JP2011227837A - Electric power buying and selling system - Google Patents

Abstract

An electric power trading system for supporting the buying and selling of surplus power between each home and the like and a neighboring facility is provided.
A home-side system 12 measures a power generation amount of a power generation system 11 and a total power consumption of a load device 13 used in a house 10, and calculates a power saleable power amount based on the measurement result. . Then, based on the calculated amount of power that can be sold, etc., a power sale condition is created and notified to the facility system 21, and the power purchase condition notified from the facility system 21 is accepted, rejected, or Any one of the response policies for changing the power sale conditions is selected, and the facility-side system 21 is notified based on the selected response policy. When the facility-side system 21 is notified of the power sale condition from the home-side system 12, the facility-side system 21 accepts, rejects, or creates a power purchase condition for the power sale condition based on the power demand situation in the facility 20. One of the response policies is selected, and a notification based on the selected response policy is given to the home system 12.
[Selection] Figure 1

Description

  The present invention relates to a technology for supporting the buying and selling of electric power obtained by using renewable energy.

  In recent years, power generation technology using renewable energy (also referred to as natural energy) such as solar and wind power has advanced, and with the assistance of the government from the viewpoint of global warming countermeasures, It is expected to spread to ordinary households.

  Such solar power generation is characterized in that the amount of power generation varies greatly depending on the weather, and power generation is performed regardless of power demand. Since it is difficult to accumulate power, surplus power that is not used in each household, etc. out of the power generated in each household, etc. is reversely flowed to the power system of the power company, etc., and purchased by the power company, etc. It will be. Various techniques relating to the buying and selling of surplus power in such general households have been proposed (for example, Patent Documents 1 to 3).

JP 2001-243358 A JP 2006-158027 A JP 2007-72934 A

  By the way, if the reverse power flow increases due to an increase in power generation systems that use renewable energy, there is a concern that costs for stabilization of the power system will increase, such as an increase in the voltage of the power system of the power company. .

  Therefore, in the future, even if the purchase of surplus power by an electric power company or the like is restricted or not purchased, it is necessary to take measures to make it possible to effectively use surplus power in each home.

  This invention is made | formed in view of the said situation, and it aims at providing the electric power trading system for assisting the buying and selling of surplus electric power between each household etc. and neighboring facilities.

To achieve the above object, the power trading system according to the present invention is:
A power trading system comprising a power seller side system installed in a house of a power seller and a power buyer side system installed in a predetermined facility,
The power seller side system is:
First communication means for communicating with the buyer side system via a predetermined network;
The power generation amount of a power generation system that is installed in the house and generates power using renewable energy and the total power consumption of the load equipment in the house are measured, and the measured power generation amount and the total power consumption are measured. Based on the amount of electric power that can be sold to calculate the amount of electric power that can be sold,
A power sale condition is created based on the amount of power available for power sale calculated by the power saleable power amount calculation means, and the created power sale condition is sent to the power purchaser side via the first communication means. In addition to notifying the system, if there is a notification of the power purchase conditions from the power buyer side system, the power purchase conditions are analyzed, and based on the result, acceptance or rejection of the power purchase conditions is accepted. Or a power sale negotiation means for selecting one of the response policies for changing the power sale conditions and performing notification to the power buyer side system based on the selected response policy,
The power buyer side system
Second communication means for communicating with the power seller side system via the predetermined network;
Demand status acquisition means for acquiring the demand status of power in the facility;
When there is a notification of the power sale condition from the power seller side system, analyze the power sale condition, and based on the result and the demand situation of the power acquired by the demand situation acquisition means, Negotiation of power purchase for selecting the response policy of acceptance, refusal or creation of power purchase condition for the power sale condition, and performing notification based on the selected response policy to the power selling side system Means.

  According to the present invention, it is possible to smoothly purchase and sell surplus power between ordinary households and neighboring facilities in a direction that does not impair both profits as much as possible.

It is a figure which shows the whole structure of the electric power trading system which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structure of the home side system of FIG. It is a block diagram which shows the structure of the facility side system of FIG. It is a flowchart which shows the procedure of a power sale negotiation process. It is a figure which shows an example of a power sale condition pattern. It is a flowchart which shows the procedure of a power purchase negotiation process. It is a block diagram which shows the structure of the home side system in the modification 1 of Embodiment 1. FIG. It is a block diagram which shows the structure of the home side system in the modification 2 of Embodiment 1. FIG. It is a figure which shows the whole structure of the electric power trading system which concerns on the modification 3 of Embodiment 1. FIG. It is a block diagram which shows the structure of the home side system of FIG. It is a figure which shows the whole structure of the electric power trading system which concerns on Embodiment 2 of this invention. It is a block diagram which shows the structure of the electric power aggregation electrical storage system of FIG. It is a figure which shows the whole structure of the electric power trading system which concerns on Embodiment 3. FIG.

  Hereinafter, a power trading system according to an embodiment of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a diagram illustrating an overall configuration of a power trading system according to Embodiment 1 of the present invention. This power trading system includes a home side system 12 and a facility side system 21. A power transmission line 30 is extended between the house 10 of a general household where the home system 12 is installed and the facility 20 where the facility system 21 is installed.

  The home-side system 12 (power seller-side system) is installed for each of a plurality of ordinary homes 10. Similarly, the home-side system 12 is connected to a power generation system 11 installed for each of a plurality of general homes 10. The power generation system 11 is a power generation system using renewable energy such as sunlight. Electric power obtained as a result of power generation by the power generation system 11 is supplied to and consumed by various load devices 13 (for example, an electric lamp, a refrigerator, a television, etc.) installed in the house 10 via the home-side system 12. The load device 13 is configured to be able to be supplied with power from a power system such as a power company.

  As shown in FIG. 2, the home-side system 12 includes a power saleable power amount calculation unit 121, a power sale negotiation unit 122, a communication unit 123, and a power transmission unit 124.

  The electric power sale possible electric energy calculation part 121 measures the electric power generation amount of the electric power generation system 11, and also measures the total electric power consumption of the load apparatus 13 in the house 10. FIG. Then, the power saleable power amount calculation unit 121 calculates a power amount that can be sold (power saleable power amount) based on the measured power generation amount and total power consumption.

  The power sale negotiation unit 122 notifies the facility side system 21 of the power sale condition created under the predetermined condition via the communication unit 123. In addition, when there is a notification of power purchase conditions from the facility-side system 21, a response policy of accepting, refusing, or creating power sale conditions for the power purchase conditions under a predetermined condition is set. The notification is made to the facility-side system 21 based on the selected response policy. In the home-side system 12, the sales contract is to notify the facility-side system 21 of “accept” or to “accept” from the facility-side system 21 for the presented power sale conditions. It is established by receiving notification.

  The communication unit 123 (first communication means) performs data communication according to a predetermined communication method with the facility side system 21 via the predetermined network 40. After the sales contract is established, the power transmission unit 124 transmits the power obtained as a result of power generation by the power generation system 11 to the facility 20 through the power transmission line 30 in accordance with the power transmission conditions based on the sales contract.

  The facility-side system 21 (power purchaser-side system) is installed in a facility 20 such as a shopping center, factory, or hospital located in the vicinity of each house 10. As shown in FIG. 3, the facility-side system 21 includes a demand status acquisition unit 211, a power purchase negotiation unit 212, a communication unit 213, and a power reception unit 214.

  The demand status acquisition unit 211 acquires the power demand status (power demand status) in the facility 20 based on the power usage status in the facility 20 and the amount of power scheduled to be supplied from a home for which a sales contract has been established. The power purchase negotiation unit 212 sets the power sale conditions presented by the home system 12 based on the power demand status acquired by the demand status acquisition unit 211 and the conditions set in advance by the operator of the facility. On the other hand, any response policy of accepting, refusing, or creating a power purchase condition is selected, and notification based on the selected response policy is made to the home-side system 12. In the facility-side system 21, the sales contract is to notify the home-side system 12 of “accepting” or to “accept” from the home-side system 12 for the presented power purchase conditions. It is established by receiving notification.

  The communication unit 213 (second communication means) performs data communication with the home system 12 via the network 40 in accordance with a predetermined communication method. The power receiving unit 214 receives the power transmitted from the home-side system 12 via the power transmission line 30 after the sales contract is established.

  FIG. 4 is a flowchart showing the procedure of the power sale negotiation process executed in the home system 12.

  First, the power sellable power amount calculation unit 121 calculates a power sellable power amount (step S101). The power sale negotiation unit 122 determines whether or not the power sale negotiation is necessary based on the calculated amount of power available for sale (step S102). For example, when the amount of power that can be sold is equal to or greater than a predetermined value, the power is not currently being sold, and there is no plan to sell power, it is determined that power sale negotiation is necessary.

  When it is determined that it is not necessary to negotiate the power sale (step S102; NO), the processing of the home system 12 returns to step S101. On the other hand, when it is determined that it is necessary to negotiate the power sale (step S102; YES), the power sale negotiation unit 122 creates a power sale condition (step S103). The power sale negotiation unit 122 selects one of the three power sale condition patterns as shown in FIG. 5 based on the amount of power that can be sold and conditions set in advance by the user (such as the household head of the household). A power sale condition is created by selecting one power sale condition pattern. Note that “constant” in each power sale condition pattern has a certain range (a specific power amount value or time is set at the time of notification), and negotiates with the facility system 21 within this range. It will be. In addition, a price (for example, a price per 1 kWh) may be included in the power sale conditions.

  Then, the power sale negotiation unit 122 notifies the facility-side system 21 of the created power sale condition via the communication unit 123 (step S104). When there is a response to the notification from the facility-side system 21 (step S105; YES), the power sale negotiation unit 122 determines whether the content of the response indicates acceptance or rejection (step S106). ). If it indicates acceptance or rejection (step S106; YES), the negotiation ends, and the processing of the home system 12 returns to step S101. In the case of acceptance, the power transmission unit 124 performs power transmission in accordance with the sales contract to indicate that the sales contract has been established.

  On the other hand, when neither the acceptance nor the rejection is accepted (step S106; NO), the response indicates the power purchase condition from the facility-side system 21, and therefore the power sale negotiation unit 122 analyzes the content and analyzes the power purchase. A response policy of either accepting, rejecting, or creating a power sale condition is selected for the condition. When accepting or rejecting the power purchase conditions (step S107; YES), the power sale negotiation unit 122 notifies the facility side system 21 via the communication unit 123 (step S108). Here, when the contents of the power purchase conditions (power amount, power purchase period, price, etc.) are outside the range of sale negotiation (preliminarily set by the user), the power sale negotiation unit 122 displays the power purchase conditions. To refuse. In addition, when the content of the power purchase condition is within the range of sales acceptance (preliminarily set by the user), the power sale negotiation unit 122 accepts the power purchase condition.

  In the case of acceptance, in order to indicate that the sales contract has been established, the power transmission unit 124 performs power transmission in accordance with the sales contract.

  On the other hand, when creation of power sale conditions is selected (step S107; NO), the power sale negotiation unit 122 creates power sale conditions again (step S103). In this case, it becomes the condition contents concessed to the facility 20 side than the previous power sale condition. For example, in the case of negotiating with the power sale condition pattern 1, a change is made such as increasing the value of the amount of power committed to supply or extending the power sale period. It is assumed that the change width at this time is set in advance by the user.

  The home-side system 12 negotiates power sales with the facility-side system 21 as described above.

  Next, the power purchase negotiation process executed by the facility system 21 will be described. FIG. 6 is a flowchart showing the procedure of the power purchase negotiation process.

  First, the demand status acquisition unit 211 acquires the power demand status of the facility 20 (step S201). And if the power sale condition notification from the home side system 12 is received via the communication part 213 (step S202; YES), the power purchase negotiation part 212 will read the power demand situation acquired by the demand situation acquisition part 211 and the power demand situation in advance. Based on the set condition, a response policy of accepting, refusing, or creating a power purchase condition is selected for the power sale condition.

  As a result, when accepting or rejecting the power purchase conditions (step S203; YES), the power purchase negotiation unit 212 notifies the home system 12 via the communication unit 213 (step S204). .

  Here, when the contents of the power sale conditions (power amount, power sale period, price, etc.) are outside the range of the purchase negotiation set based on the power demand situation etc., the power purchase negotiation unit 212 To refuse. In addition, when the content of the power sale condition is within the range of the purchase consent set based on the power demand situation or the like, the power purchase negotiation unit 212 accepts the power sale condition.

  In the case of acceptance, in order to indicate that the sales contract has been established, power transmission according to the sales contract is performed by the power transmission unit 124 of the home system 12 and is received by the power reception unit 214.

  On the other hand, when creation of power purchase conditions is selected (step S203; NO), the power purchase negotiation unit 212 creates power purchase conditions (step S205). The power purchase conditions in this case are slightly stricter than the notified power sale conditions (for example, an increase in the amount of power or an extension of the power sale period is required). It is assumed that the change width at this time is set in advance by the user. Then, the power purchase negotiation unit 212 notifies the home power system 12 of the created power purchase conditions via the communication unit 213 (step S206).

  When there is a response to the notification from the home-side system 12 (step S207; YES), the power purchase negotiation unit 212 determines whether the content of the response indicates acceptance or rejection (step S208). ). If it indicates acceptance or rejection (step S208; YES), the negotiation ends, and the processing of the facility side system 21 returns to step S201. Here, in the case of acceptance, in order to indicate that a sales contract has been established, power transmission in accordance with the sales contract is performed by the power transmission unit 124 of the facility-side system 21.

  On the other hand, when neither the acceptance nor the rejection is present (step S208; NO), the power purchase negotiation unit 212 executes the process of step 203 described above because the response indicates the power sale condition from the home-side system 12. . Thereafter, the above-described processing is repeated.

  As described above, according to the power trading system of the present embodiment, it is possible to smoothly purchase and sell surplus power between ordinary households and neighboring facilities in a direction in which both profits are not lost as much as possible. Therefore, it can contribute to the spread of power generation systems using renewable energy. In addition, in the facility 20, by using electric power based on renewable energy (so-called green electric power), an advertising effect such as an improvement in image can be expected.

  Then, the modification of the electric power trading system which concerns on the above Embodiment 1 is demonstrated. FIG. 7 is a block diagram illustrating a configuration of the home-side system 12 according to the first modification of the first embodiment. In this example, as shown in FIG. 7, the home-side system 12 includes a demand prediction unit 125 that predicts the demand for power in the house 10. For example, the demand prediction unit 125 predicts the power demand from the present time to a predetermined period from the current time and the past power usage record in the house 10. The power sale negotiation unit 122 executes the power sale negotiation process in consideration of the prediction result of the demand prediction unit 125. By doing in this way, the precision of the power sale conditions to create can be improved.

  FIG. 8 is a block diagram illustrating a configuration of the home-side system 12 in the second modification of the first embodiment. In this example, as illustrated in FIG. 8, the home-side system 12 includes a power storage unit 126 such as a storage battery that stores surplus power generated by the power generation system 11. In this case, for example, the power sale negotiation unit 122 starts negotiation with the facility-side system 21 when full power storage in the power storage unit 126 is completed (or reaches a predetermined power storage amount). When the sales contract is established, the power from the power storage unit 126 is transmitted to the facility system 21.

  FIG. 9 is a diagram illustrating the overall configuration of the power trading system according to the third modification of the first embodiment, and FIG. 10 is a block diagram illustrating the configuration of the home-side system 12 in this example. As shown in FIG. 10, the home-side system 12 includes a certification information generation unit 128. The certification information generation unit 128 is connected to the power meter 14 via the communication line 127 so that data communication is possible. The power meter 14 measures the power value of the transmission line 60 that is wired to the house 10 from a power system (commercial power supply) such as an electric power company, and transmits the measurement result to the home-side system 12.

  The certification information generation unit 128 (certification notification means) monitors the measurement result of the power meter 14, and if the power supply from the commercial power source is not received during the power transmission period to the facility side system 21, the fact is notified. Information (certification information) to be shown is generated and transmitted to the facility side system 21 via the communication unit 123. Thus, the household can prove to the facility 20 that the surplus power has been sold, and the facility 20 can externally prove that it has been supplied with electric power based on renewable energy. become.

(Embodiment 2)
Next, the power trading system according to Embodiment 2 of the present invention will be described. FIG. 11 is a diagram showing an overall configuration of the power trading system according to Embodiment 2 of the present invention. This power trading system includes a home side system 15 (power seller side system), a facility side system 21 (power purchaser side system), and a power intensive power storage system 50. In the power trading system according to the second embodiment, the home-side system 15 does not directly negotiate or supply power with the facility-side system 21, but the power-intensive power storage system 50 mediates between them.

  As illustrated in FIG. 12, the power-intensive power storage system 50 includes a power storage unit 501, a power storage status acquisition unit 502, a power sale negotiation unit 503, a communication unit 504, and a power transmission unit 505. The power storage unit 501 is configured by a storage battery or the like, and stores surplus power supplied from the home-side system 15 of each house 10. The power storage status acquisition unit 502 acquires the power storage status such as the power storage amount of the power storage unit 501. The power sale negotiation unit 503 negotiates with the facility side system 21 on the basis of the power storage status acquired by the power storage status acquisition unit 502, similar to the home system 12 of the first embodiment.

  The communication unit 504 performs data communication according to a predetermined communication method with the home-side system 15 and the facility-side system 21 via the network 40. The power transmission unit 505 transmits power from the power storage unit 501 to the facility system 21 via the power transmission line 30 in accordance with the power transmission conditions based on the sales contract after the sales contract is established.

  In the above configuration, surplus power in each household is collected and stored in the power intensive power storage system 50. Thereby, the power intensive power storage system 50 can provide the facility 20 with stable power at all times. For this reason, the negotiation about the sales contract with the facility 20 works favorably, and the sales contract can be established under favorable conditions. Money obtained from this sales contract is distributed according to the amount of power supplied by each household. For this reason, each household can sell electricity on favorable conditions rather than negotiating a sales contract with the facility-side system 21 individually.

(Embodiment 3)
Then, the power trading system concerning Embodiment 3 of the present invention is explained. FIG. 13 is a diagram illustrating an overall configuration of a power trading system according to Embodiment 3 of the present invention. This power trading system includes a vehicle side system 16 (power seller side system) and a facility side system 21 (power purchaser side system). The vehicle side system 16 is mounted on a vehicle 70 such as an electric vehicle. For example, when the car 70 is parked in a predetermined parking space at the home of the owner of the car 70, the car-side system 16 is connected to the power generation system 11 installed at the home or the like. The power generation system 11 is a power generation system using renewable energy such as sunlight as in the first and second embodiments. The vehicle side system 16 has the same configuration (see FIG. 8) as the home side system 12 in the second modification of the first embodiment.

  The power sale negotiation unit 122 of the vehicle-side system 16 starts negotiations with the facility-side system 21 via the communication unit 123 when full power storage in the power storage unit 126 is completed (or when a predetermined power storage amount is reached). To do. When the sales contract is established, power from the power storage unit 126 is transmitted to the facility-side system 21 via the power transmission line 30 in a power sale area (for example, a parking lot of the facility 20).

  In the power trading system of the third embodiment, surplus power trading negotiation based on power generation of the power generation system 11 using renewable energy such as sunlight is performed using the vehicle-side system 16 mounted on the car 70. Then, when the sales contract is established, the power stored in the power storage unit 126 of the vehicle side system 16 is transmitted to the facility side system 21. For this reason, in addition to the same effects as those of the first embodiment, an overhead line of the power transmission line connecting the facility 20 and each home is not necessary, and the equipment cost can be reduced.

  In addition, this invention is not limited to the said embodiment, Of course, the various change in the range which does not deviate from the summary of this invention is possible.

  For example, in sales negotiations between the home-side system 12 and the facility-side system 21, as a consideration for selling power, not only money but also securities that can be used in the same way as cash in the facility 20 are not included in the power-selling conditions or power purchase. You may make it include in conditions.

  In addition, when negotiations are not settled within a predetermined time in a sales negotiation (power sale negotiation process, power purchase negotiation process), the contract may be not established, or the home system 12 or the like is presented from the facility system 21. You may make it accept unconditionally the price etc. which were done.

  INDUSTRIAL APPLICABILITY The present invention can be suitably employed as a technology that supports the buying and selling of electric power obtained using renewable energy.

DESCRIPTION OF SYMBOLS 10 House 11 Electric power generation system 12, 15 Home side system 121 Power sale possible electric energy calculation part 122 Power sale negotiation part 123 Communication part 124 Power transmission part 125 Demand prediction part 126 Power storage part 127 Communication line 128 Certification information generation part 13 Load apparatus 14 Electric power Meter 16 Vehicle-side system 20 Facility 21 Facility-side system 211 Demand status acquisition unit 212 Electricity purchase negotiation unit 213 Communication unit 214 Power reception unit 30 Transmission line 40 Network 50 Power-intensive power storage system 501 Power storage unit 502 Power storage status acquisition unit 503 Power sale negotiation unit 504 Communication unit 505 Power transmission unit 60 Transmission line 70 Car

Claims (9)

A power trading system comprising a power seller side system installed in a house of a power seller and a power buyer side system installed in a predetermined facility,
The power seller side system is:
First communication means for communicating with the buyer side system via a predetermined network;
The power generation amount of a power generation system that is installed in the house and generates power using renewable energy and the total power consumption of the load equipment in the house are measured, and the measured power generation amount and the total power consumption are measured. Based on the amount of electric power that can be sold to calculate the amount of electric power that can be sold,
A power sale condition is created based on the amount of power available for power sale calculated by the power saleable power amount calculation means, and the created power sale condition is sent to the power purchaser side via the first communication means. In addition to notifying the system, if there is a notification of the power purchase conditions from the power buyer side system, the power purchase conditions are analyzed, and based on the result, acceptance or rejection of the power purchase conditions is accepted. Or a power sale negotiation means for selecting one of the response policies for changing the power sale conditions and performing notification to the power buyer side system based on the selected response policy,
The power buyer side system
Second communication means for communicating with the power seller side system via the predetermined network;
Demand status acquisition means for acquiring the demand status of power in the facility;
When there is a notification of the power sale condition from the power seller side system, analyze the power sale condition, and based on the result and the demand situation of the power acquired by the demand situation acquisition means, Negotiation of power purchase for selecting the response policy of acceptance, refusal or creation of power purchase condition for the power sale condition, and performing notification based on the selected response policy to the power selling side system Means,
Electricity trading system characterized by that. When the power seller side system receives a notification regarding acceptance or rejection from the power purchaser side system, or when the power purchaser side system receives notification regarding acceptance or rejection from the power seller side system If received, the sales negotiations between the two parties will end.
The power trading system according to claim 1. If the sales negotiation between the power seller side system and the power buyer side system is not terminated within a predetermined time, the power sale negotiation means of the power seller side system is A notification indicating acceptance of the presented power purchase conditions is given to the power buyer side system;
The power trading system according to claim 2. A transmission line is installed between the house and the facility,
The power seller side system further includes power transmission means for transmitting power based on power generation of the power generation system to the facility via the power transmission line,
The power buyer side system further includes power receiving means for receiving power transmitted from the house via the power transmission line,
The power buying and selling system according to any one of claims 1 to 3. The power seller side system is:
Further comprising a demand prediction means for predicting the demand for electric power in the house,
The power sale negotiation means includes the prediction result of the demand prediction means, and creates the power sale conditions or selects the response policy.
The power buying and selling system according to any one of claims 1 to 4. The power seller side system further includes power storage means for storing surplus power generated by the power generation system,
The power saleable power amount calculating means calculates the amount of power that can be sold, taking into account the state of power storage in the power storage means.
The power buying and selling system according to any one of claims 1 to 5. The power seller side system is:
When the power value of a transmission line connected from the commercial power source to the house is monitored, and the load device does not receive power supply from the commercial power source within the power transmission period to the power buyer side system , Further comprising proof notification means for performing notification to that effect to the power buyer side system via the first communication means,
The power buying and selling system according to any one of claims 1 to 6. A power trading system comprising a power seller side system installed in a house of a power seller, a power intensive storage system, and a power buyer side system installed in a predetermined facility,
The power seller side system is:
Means for communicating with the power intensive power storage system via a predetermined network;
Power transmission means installed in the house and transmitting surplus power generated by a power generation system that generates power using renewable energy to the power-intensive power storage system,
The power intensive power storage system is:
First communication means for communicating with the power buyer side system and the power seller side system via the predetermined network;
Power storage means for storing the power transmitted from the power seller side system;
Power storage status acquisition means for acquiring the power storage status in the power storage means;
A power sale condition is created based on the power storage status acquired by the power storage status acquisition means, the created power sale condition is notified to the power buyer side system via the first communication means, and the purchase If there is a notification of the power purchase conditions from the power-side system, the power purchase conditions are analyzed, and on the basis of the result, acceptance, refusal, or change of the power sale conditions is made. A power sale negotiation means for selecting any response policy and performing notification based on the selected response policy to the power buyer side system,
The power buyer side system
Second communication means for communicating with the power intensive power storage system via the predetermined network;
Demand status acquisition means for acquiring the demand status of power in the facility;
When there is a notification of power sale conditions from the power intensive power storage system, analyze the power sale conditions, and based on the result and the demand situation of the power obtained by the demand situation acquisition means, A power purchase negotiation means for selecting a response policy of acceptance, refusal or creation of a power purchase condition with respect to the power sale condition, and performing notification based on the selected response policy to the power intensive power storage system; Comprising
Electricity trading system characterized by that. A power trading system comprising a power seller side system installed in a car owned by a power seller and a power buyer side system installed in a predetermined facility,
The power seller side system is:
First communication means for communicating with the buyer side system via a predetermined network;
Power storage means for storing surplus power generated by the power generation system that generates power using renewable energy; and
A power saleable electric energy calculating means for calculating the amount of electric power that can be sold based on the state of power storage in the power storage means;
A power sale condition is created based on the amount of power available for power sale calculated by the power saleable power amount calculation means, and the created power sale condition is sent to the power purchaser side via the first communication means. In addition to notifying the system, if there is a notification of the power purchase conditions from the power buyer side system, the power purchase conditions are analyzed, and based on the result, acceptance or rejection of the power purchase conditions is accepted. Or a power sale negotiation means for selecting one of the response policies for changing the power sale conditions and performing notification to the power buyer side system based on the selected response policy,
The power buyer side system
Second communication means for communicating with the power seller side system via the predetermined network;
Demand status acquisition means for acquiring the demand status of power in the facility;
When there is a notification of the power sale condition from the power seller side system, analyze the power sale condition, and based on the result and the demand situation of the power acquired by the demand situation acquisition means, Negotiation of power purchase for selecting the response policy of acceptance, refusal or creation of power purchase condition for the power sale condition, and performing notification based on the selected response policy to the power selling side system Means,
Electricity trading system characterized by that.

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