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WO2018179712A1 - Dispositif de conversion de puissance et système de conversion de puissance - Google Patents

Dispositif de conversion de puissance et système de conversion de puissance Download PDF

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Publication number
WO2018179712A1
WO2018179712A1 PCT/JP2018/001802 JP2018001802W WO2018179712A1 WO 2018179712 A1 WO2018179712 A1 WO 2018179712A1 JP 2018001802 W JP2018001802 W JP 2018001802W WO 2018179712 A1 WO2018179712 A1 WO 2018179712A1
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WO
WIPO (PCT)
Prior art keywords
power
inverter
output
converter
bus
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Application number
PCT/JP2018/001802
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English (en)
Japanese (ja)
Inventor
智規 伊藤
渉 堀尾
菊池　彰洋
藤井　裕之
賢治 花村
康太 前場
Original Assignee
パナソニックＩｐマネジメント株式会社
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Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Publication of WO2018179712A1 publication Critical patent/WO2018179712A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
    • H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
    • H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Definitions

  • the present invention relates to a power conversion device and a power conversion system that convert DC power into AC power.
  • distributed power sources that are grid-connected include solar cells, fuel cells, stationary storage batteries, and in-vehicle storage batteries as power sources.
  • a typical configuration of a distributed power supply system connected to a system is a configuration in which a single distributed power supply is used to connect the system via a DC-DC converter, a DC bus and an inverter, and a plurality of distributed power supplies. Are connected to each other via each DC-DC converter, a common DC bus, and one inverter (see, for example, Patent Document 1).
  • the DC-DC converter and the inverter are physically installed in a single housing, the DC-DC converter and the inverter are controlled independently by separate control devices (for example, a microcomputer). Sometimes it is done. In such a distributed power supply system in which the DC-DC converter and the inverter are physically or controlly separated, it is necessary to make adjustments between the respective power conversion units.
  • the inverter discharge power in response to events such as system voltage rise, inverter component temperature rise, remote output command reception, and reverse power flow detection
  • a control method for suppressing the above is used.
  • the voltage of the DC bus rises immediately after starting the inverter output suppression.
  • the DC-DC converter determines from the rise in the voltage of the DC bus that the inverter is suppressing the output, and suppresses the discharge power to the DC bus so that the voltage of the DC bus does not rise above a predetermined voltage.
  • the inverter releases the output suppression when the above event is settled and a certain time has elapsed.
  • the combined power of the power stored in the DC bus and the discharge power of the DC-DC converter is input to the inverter, the output power of the inverter rises accordingly, the system voltage rises again, and again
  • a hunting phenomenon that the inverter output suppression function works will occur.
  • the hunting phenomenon leads to a lack of stability of the inverter output and also leads to a decrease in power conversion efficiency of the inverter.
  • the present invention has been made in view of such circumstances, and an object thereof is to provide a power conversion device and a power conversion system that suppress a hunting phenomenon when the output of an inverter is suppressed.
  • a power conversion device includes an inverter that converts DC power into AC power and supplies the AC power to a load or a power system, and a control circuit that controls the inverter.
  • the control circuit controls the second slope when increasing the output of the inverter by the disappearance of the output suppression reason more gently than the first slope when reducing the output of the inverter due to the occurrence of the output suppression reason. .
  • the hunting phenomenon when the output of the inverter is suppressed can be suppressed.
  • 2A and 2B are diagrams schematically illustrating the state of the voltage of the DC bus. It is a figure which shows an example of the current control at the time of the output suppression of an inverter. It is a figure which shows the application example of the current control at the time of the output suppression of an inverter.
  • FIG. 1 is a diagram for explaining a power conversion system 1 according to an embodiment of the present invention.
  • the power conversion system 1 includes a first power conversion device 10 and a second power conversion device 20.
  • the first power conversion device 10 is a power conditioner system for the solar cell 2
  • the second power conversion device 20 is a power conditioner system for the power storage unit 3.
  • FIG. 1 the example which retrofitted the power conditioner system for the electrical storage part 3 to the power conditioner system for the solar cells 2 is shown.
  • the solar cell 2 is a power generation device that directly converts light energy into electric power using the photovoltaic effect.
  • a silicon solar cell, a solar cell made of a compound semiconductor or the like, a dye-sensitized type (organic solar cell), or the like is used as the solar cell 2.
  • the solar cell 2 is connected to the first power conversion device 10 and outputs the generated power to the first power conversion device 10.
  • the first power converter 10 includes a DC-DC converter 11, a converter control circuit 12, an inverter 13, an inverter control circuit 14, and a system control circuit 15.
  • the system control circuit 15 includes a reverse flow power measurement unit 15a, a command value generation unit 15b, and a communication control unit 15c.
  • the DC-DC converter 11 and the inverter 13 are connected by a DC bus 40.
  • the converter control circuit 12 and the system control circuit 15 are connected by a communication line 41, and communication conforming to a predetermined serial communication standard (for example, RS-485 standard, TCP-IP standard) is performed between the two.
  • a predetermined serial communication standard for example, RS-485 standard, TCP-IP standard
  • the DC-DC converter 11 converts the DC power output from the solar cell 2 into DC power having a desired voltage value, and outputs the converted DC power to the DC bus 40.
  • the DC-DC converter 11 can be constituted by a step-up chopper, for example.
  • the converter control circuit 12 controls the DC-DC converter 11. As a basic control, the converter control circuit 12 performs MPPT (Maximum Power Point Tracking) control of the DC-DC converter 11 so that the output power of the solar cell 2 is maximized. Specifically, converter control circuit 12 measures the input voltage and input current of DC-DC converter 11, which are the output voltage and output current of solar cell 2, and estimates the generated power of solar cell 2. The converter control circuit 12 generates a command value for setting the generated power of the solar battery 2 to the maximum power point (optimum operating point) based on the measured output voltage of the solar battery 2 and the estimated generated power.
  • MPPT Maximum Power Point Tracking
  • the maximum power point is searched by changing the operating point voltage with a predetermined step width according to the hill-climbing method, and the command value is generated so as to maintain the maximum power point.
  • the DC-DC converter 11 performs a switching operation according to a drive signal based on the generated command value.
  • the inverter 13 is a bidirectional inverter that converts DC power input from the DC bus 40 into AC power and outputs the converted AC power to a distribution line 50 connected to a commercial power system (hereinafter simply referred to as system 4). To do. A load 5 is connected to the distribution line 50. Further, the inverter 13 converts AC power supplied from the system 4 into DC power, and outputs the converted DC power to the DC bus 40. A smoothing electrolytic capacitor (not shown) is connected to the DC bus 40.
  • the inverter control circuit 14 controls the inverter 13. As a basic control, the inverter control circuit 14 controls the inverter 13 so that the voltage of the DC bus 40 maintains the first threshold voltage. Specifically, the inverter control circuit 14 detects the voltage of the DC bus 40 and generates a command value for making the detected bus voltage coincide with the first threshold voltage. The inverter control circuit 14 generates a command value for increasing the duty ratio of the inverter 13 when the voltage of the DC bus 40 is higher than the first threshold voltage, and the inverter control circuit 14 when the voltage of the DC bus 40 is lower than the first threshold voltage. A command value for lowering the duty ratio of 13 is generated. The inverter 13 performs a switching operation according to a drive signal based on the generated command value.
  • the power storage unit 3 can charge and discharge electric power, and includes a lithium ion storage battery, a nickel hydride storage battery, a lead storage battery, an electric double layer capacitor, a lithium ion capacitor, and the like.
  • the power storage unit 3 is connected to the second power conversion device 20.
  • the second power conversion device 20 includes a DC-DC converter 21 and a converter control circuit 22.
  • the converter control circuit 22 and the system control circuit 15 of the first power conversion device 10 are connected by a communication line 42, and communication based on a predetermined serial communication standard is performed between them.
  • the DC-DC converter 21 is a bidirectional converter that is connected between the power storage unit 3 and the DC bus 40 and charges and discharges the power storage unit 3.
  • the converter control circuit 22 controls the DC-DC converter 21.
  • the converter control circuit 22 controls the DC-DC converter 21 based on the command value transmitted from the system control circuit 15 to control the power storage unit 3 at a constant current (CC) / constant voltage (CV).
  • CC constant current
  • CV constant voltage
  • Charge / discharge For example, the converter control circuit 22 receives a power command value from the system control circuit 15 at the time of discharging, and uses a value obtained by dividing the power command value by the voltage of the power storage unit 3 as a current command value. Discharge.
  • the operation display device 30 is a user interface of the first power conversion device 10 and is installed at a predetermined position in the room.
  • the operation display device 30 can be constituted by a touch panel display, for example, and provides predetermined information to the user and accepts an operation from the user.
  • the operation display device 30 and the system control circuit 15 are connected by a communication line 43, and communication based on a predetermined serial communication standard is performed between them.
  • the operation display device 30 and the system control circuit 15 may be connected wirelessly.
  • the output power of the inverter 13 needs to be suppressed.
  • the main output suppression reasons include the occurrence of reverse power flow from the inverter 13 to the grid 4, the rise of the grid voltage exceeding the set voltage, the reception of the remote output command, the temperature rise exceeding the set temperature of the components in the inverter 13, the inverter 13 An increase in power exceeding the rated power and an increase in current exceeding the rated current of the inverter 13 can be mentioned.
  • the system control circuit 15 receives an instruction related to the output power amount and output timing to the grid 4 from a grid operating organization such as a power company via an external network (for example, the Internet or a dedicated line).
  • a grid operating organization such as a power company
  • an external network for example, the Internet or a dedicated line
  • the reverse power flow measurement unit 15 a of the first power conversion device 10 detects the occurrence of reverse power flow based on the measurement value of a CT sensor (not shown) installed on the distribution line 50. .
  • the converter control circuit 22 of the second power conversion device 20 receives reverse flow detection information from the system control circuit 15 via the communication line 42.
  • the communication line 42 is often installed over the DC bus 40 that connects the first power conversion device 10 and the second power conversion device 20, and in this configuration, the communication line 42 is affected by noise from the DC bus 40. .
  • the shorter the unit period representing one bit the weaker it becomes to noise. Basically, the bit error is more likely to occur as the communication speed is increased.
  • the first power conversion device 10 detects reverse power flow, generates communication data instructing output suppression, and transmits the communication data to the second power conversion device 20 via the communication line 42, it is defined in the grid interconnection regulations.
  • the time limit 500 ms
  • the content of communication data may change during the process due to noise.
  • the inverter control circuit 14 controls the inverter 13 so that the voltage of the DC bus 40 maintains the first threshold voltage as basic control.
  • the inverter control circuit 14 executes output suppression control as priority control. Specifically, the inverter control circuit 14 controls the inverter 13 so that the output of the inverter 13 does not exceed the command value (specifically, the upper limit current value or the upper limit power value) generated by the command value generation unit 15b.
  • the bus voltage stabilization control for controlling the voltage of the DC bus 40 to be maintained at the first threshold voltage is stopped.
  • the converter control circuit 22 receives, as basic control, the amount of discharge from the power storage unit 3 to the DC-DC converter 21 or the amount of charge from the DC-DC converter 21 to the power storage unit 3 transmitted from the system control circuit 15.
  • the DC-DC converter 21 is controlled so that the command value comes.
  • the converter control circuit 22 controls the DC-DC converter 21 as priority control so that the voltage of the DC bus 40 does not exceed the second threshold voltage. This control has priority over the control for adjusting the output to the command value transmitted from the system control circuit 15.
  • the second threshold voltage is set to a value higher than the first threshold voltage.
  • the converter control circuit 12 performs MPPT control on the DC-DC converter 11 so that the output power of the solar cell 2 is maximized as basic control. Further, the converter control circuit 12 controls the DC-DC converter 11 as priority control so that the voltage of the DC bus 40 does not exceed the third threshold voltage. This control has priority over MPPT control.
  • the third threshold voltage is set to a value higher than the second threshold voltage.
  • the first threshold voltage is set to a steady voltage of the DC bus 40.
  • the first threshold voltage is set in the range of DC 280 V to 360 V, for example.
  • the second threshold voltage is set to 390V
  • the third threshold voltage is set to 410V, for example.
  • FIG. 2 (a) and 2 (b) are diagrams schematically illustrating the voltage state of the DC bus 40.
  • FIG. FIG. 2A shows the voltage state of the DC bus 40 in a steady state. The constant voltage of the DC bus 40 is maintained at the first threshold voltage by the inverter 13.
  • FIG. 2B shows the voltage state of the DC bus 40 when the output of the inverter 13 is suppressed. Normally, the voltage of the DC bus 40 during output suppression is maintained at the second threshold voltage by the DC-DC converter 21 of the power storage unit 3.
  • the inverter 13 When the output suppression of the inverter 13 is released from the state shown in FIG. 2B, the inverter 13 returns to the control for maintaining the voltage of the DC bus 40 at the first threshold voltage. Specifically, the limit value (upper limit value) of the output of the inverter 13 is returned to the rated output value of the inverter 13. In this state, unless an unexpected event occurs, the output of the inverter 13 does not reach the limit value, and only the voltage stabilization control of the DC bus 40 is activated.
  • the inverter 13 When the output suppression of the inverter 13 is released, the inverter 13 tries to discharge the electric charge accumulated in the electrolytic capacitor at the same time in order to reduce the voltage of the DC bus 40 from the second threshold voltage to the first threshold voltage. As a result, the output power of the inverter 13 increases, an output suppression event occurs again, and the voltage of the DC bus 40 increases again. Thereafter, when the reason for suppressing the output disappears, the inverter 13 again releases the electric charge accumulated in the electrolytic capacitor, and the output power of the inverter 13 increases. That is, a hunting phenomenon occurs.
  • the first inclination when the output of the inverter 13 is decreased due to the generation of the output suppression reason is controlled so as to become gentler.
  • FIG. 3 is a diagram illustrating an example of current control when the output of the inverter 13 is suppressed.
  • the limit value (upper limit value) of the suppression current of the inverter 13 is set to the rated output current value of the inverter 13 in a steady state. That is, even if the voltage of the DC bus 40 increases due to a sudden event during normal operation, the output current of the inverter 13 is set to stop increasing at the rated output current value.
  • the inverter control circuit 14 decreases the output of the inverter 13 with the first slope S1.
  • the first slope S1 is defined by a suppression amount [A / ms] per unit time.
  • the first slope S1 is set so that the time from when the inverter 13 starts suppression during discharge at the rated output value to when the suppression is completed falls within the standard value.
  • the power storage unit 3 discharges 2.0 kW, and the inverter 13 supplies 5.5 kW to the load 5.
  • the load 5 is disconnected from this state and the power consumption of the load 5 becomes 0.0 W, the 5.5 kW output power of the inverter 13 flows backward to the grid 4.
  • the reverse power flow is not stopped within 500 ms, the inverter 13 must be disconnected from the system 4, and the power generation of the solar cell 2 is stopped during the disconnection, resulting in an economic loss.
  • the grid interconnection regulations can be satisfied, and the inverter 13 need not be disconnected. .
  • the amount of suppression [A / ms] per unit time is calculated by dividing the difference between the rated output value of the inverter 13 and the target power value by the time for completing the suppression. For example, in the case of output suppression by a remote output command, the time to complete the suppression is on the order of seconds or minutes, and the first slope S1 becomes gentle compared to the case of output suppression due to the occurrence of reverse power flow.
  • the output of the inverter 13 may be suppressed by a current value or may be suppressed by a power value.
  • the current value it is possible to suppress overcurrent due to excessive output at the time of release of suppression.
  • the power value the output can be accurately suppressed even when the system voltage changes.
  • the system voltage may change according to output suppression such as suppression when the system voltage rises.
  • the output of the inverter 13 may be suppressed by both the current value and the power value.
  • the inverter control circuit 14 increases the output of the inverter 13 with the second slope S2.
  • the second slope S2 is defined by the suppression release amount [A / ms] per unit time.
  • the second slope S2 is set more gently than the first slope S1.
  • the second slope S2 is determined based on the rated output value of the inverter 13 and the rated output value of the DC-DC converter 21, for example.
  • the inverter 13 when the rated output power value of the inverter 13 is 5 kW and the rated output power value of the DC-DC converter 21 is 3 kW, only the DC-DC converter 21 is discharging at the rated output value (the inverter 13 is outputting at 3 kW).
  • the DC-DC converter 21 is discharged again at the rated output value, and the inverter 13 is connected to the DC bus 40 according to the discharge power of the DC-DC converter 21.
  • the electric charge accumulated in the electrolytic capacitor is discharged.
  • the inverter 13 discharges a maximum of 5 kW immediately after the suppression is released.
  • the output power of the inverter 13 becomes excessive with respect to the output power of the DC-DC converter 21.
  • the second slope S2 is set in consideration of this excessive electric energy. Specifically, the second slope S2 is set so that the suppression release time becomes longer as the excessive amount of power increases.
  • the suppression release time is the time from when the suppression release is started until the limiter value of the output current or output power of the inverter 13 is restored to the limiter value at the steady state. Thereby, the output power of the inverter 13 can be discharged so that the output suppression function is not activated again.
  • the second slope S2 may be determined in consideration of the difference between the first threshold voltage and the second threshold voltage and the capacitance of the electrolytic capacitor.
  • the second slope S2 may be determined based on the difference between the voltage of the DC bus 40 when the inverter 13 starts output suppression and the voltage of the DC bus 40 when the inverter 13 cancels output suppression. As the difference is larger, the second slope S2 is set more gently.
  • FIG. 4 is a diagram showing an application example of current control when the output of the inverter 13 is suppressed.
  • the first slope S1 and / or the second slope S2 shown in FIG. 3 may be variably designed (see S1, S1a, S1b, S2, S2a, S2b).
  • the suppression speed can be delayed or the suppression release speed can be increased according to the state of the system 4 or the load 5.
  • the suppression release speed can be increased for the system 4 having a larger capacity.
  • the suppression release speed can be increased as the power consumption of the load 5 increases. Conversely, when the capacity of the system 4 is small or when the power consumption of the load 5 is small, it is necessary to slow down the suppression release speed.
  • the first slope S1 and / or the second slope S2 may be changed according to the type of the output suppression reason. For example, when the reason for output suppression is temperature rise or system voltage rise, immediate output suppression and output suppression release are not required. On the other hand, as described above, when reverse power flow occurs, immediate output suppression is required. Further, when the output is suppressed due to the power failure of the grid 4, after the recovery from the power failure, the immediate output suppression release is requested according to the FRT (Fault Ride Through) requirement defined by the grid interconnection regulations. As described above, the required return time period differs depending on the cause of the suppression start. However, by making the first slope S1 and / or the second slope S2 variable, it is possible to cope flexibly.
  • FRT ault Ride Through
  • the output of the inverter 13 becomes excessive when the output suppression is canceled, and the hunting phenomenon is suppressed again. Can be suppressed.
  • the first slope S1 is set to a value that can suppress the rated output value of the inverter 13 to a predetermined power value within a predetermined time. Thereby, for example, when a remote output command is received, power suppression that satisfies the command can be quickly performed. In addition, even when a reverse power flow occurs due to the opening of the load 5 or the like, it is possible to suppress power within a time limit that complies with the grid connection regulations.
  • the second slope S2 is set based on the rated output value of the DC-DC converter 21.
  • the output current or output power of the DC-DC converter 21 is specified using communication. There is a need.
  • the output suppression of the inverter 13 is canceled, the output of the inverter 13 becomes excessive when the voltage of the DC bus 40 is greatly deviated upward from the target value (first threshold voltage). In other words, since the maximum voltage is discharged so that the voltage of the DC bus 40 becomes the target value, the output of the inverter 13 becomes excessive.
  • the second slope S2 is determined based on the difference between the voltage of the DC bus 40 when the inverter 13 starts suppressing the output and the voltage of the DC bus 40 when releasing the output suppression, the inverter 13 is connected to the DC bus 40. Even if there are a plurality of DC-DC converters or the DC-DC converter 21 is separated from the inverter 13, the power can be controlled independently on the inverter 13 side.
  • the inverter control circuit 14 and the system control circuit 15 are depicted separately, but each may be realized by a separate microcomputer or may be realized by a single microcomputer.
  • the example in which the first power conversion device 10 and the second power conversion device 20 are installed in different cases has been described.
  • a configuration example in which the system control circuit 15 and the converter control circuit 22 are connected by the communication line 42 while the first power conversion device 10 and the second power conversion device 20 are installed in one housing is also an example of the present invention. It is included in the embodiment.
  • the solar cell 2 is connected to the first power conversion device 10 .
  • another power generation device using renewable energy such as a wind power generation device or a micro hydraulic power generation device, may be connected.
  • the power converter (10) characterized by controlling the 2nd inclination at the time of making loose. According to this, it is possible to suppress a hunting phenomenon in which the output becomes excessive when the suppression of the inverter (13) is released and is suppressed again.
  • the DC side of the inverter (13) is connected via a DC bus (40) to a DC-DC converter (21) that controls the output of a predetermined DC power supply (3).
  • the power converter (10) according to item 1 or 2 wherein the second slope is determined based on a rated output of the DC-DC converter (21) and a rated output of the inverter (13). ).
  • the DC side of the inverter (13) is connected via a DC bus (40) to a DC-DC converter (21) that controls the output of a predetermined DC power supply (3).
  • the inverter (13) and the DC-DC converter (21) are installed in separate housings,
  • the second slope includes the voltage of the DC bus (40) when the inverter (13) starts output suppression and the voltage of the DC bus (40) when the inverter (13) ends output suppression.
  • control circuit (14, 15) changes at least one of the value of the first inclination and the value of the second inclination in accordance with the type of the output suppression reason.
  • Conversion device (10) According to this, flexible output suppression control according to the kind of output suppression reason is attained.
  • the present invention can be used for a distributed power supply system in which a solar battery and a stationary storage battery are combined.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

L'invention concerne un dispositif de conversion de puissance (10) dans lequel un onduleur (13) convertit une puissance en courant continu en une puissance en courant alternatif et fournit la puissance en courant alternatif à une charge (5) ou à un système (4). Des circuits de commande (14, 15) commandent l'onduleur (13). Les circuits de commande (14, 15) commandent plus rigoureusement une première pente qui est destinée à faire diminuer le courant de sortie de l'onduleur (13) du fait d'une raison visant à inhiber le courant de sortie qu'une seconde pente qui est destinée à faire augmenter le courant de sortie de l'onduleur (13) du fait de l'expiration d'une raison visant à inhiber le courant de sortie.
PCT/JP2018/001802 2017-03-30 2018-01-22 Dispositif de conversion de puissance et système de conversion de puissance WO2018179712A1 (fr)

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JP2017-068993 2017-03-30
JP2017068993A JP6846709B2 (ja) 2017-03-30 2017-03-30 電力変換装置、電力変換システム

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113965098A (zh) * 2021-09-22 2022-01-21 江苏阿诗特能源科技有限公司 一种非线性负载下单相逆变器控制方法及相关装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08280136A (ja) * 1995-04-05 1996-10-22 Fuji Electric Co Ltd 電力系統と連系する分散配置型電源の制御方法
JPH11206021A (ja) * 1997-12-29 1999-07-30 Hitachi Ltd 分散形発電システム

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08280136A (ja) * 1995-04-05 1996-10-22 Fuji Electric Co Ltd 電力系統と連系する分散配置型電源の制御方法
JPH11206021A (ja) * 1997-12-29 1999-07-30 Hitachi Ltd 分散形発電システム

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113965098A (zh) * 2021-09-22 2022-01-21 江苏阿诗特能源科技有限公司 一种非线性负载下单相逆变器控制方法及相关装置
CN113965098B (zh) * 2021-09-22 2023-04-07 江苏阿诗特能源科技有限公司 一种非线性负载下单相逆变器控制方法及相关装置

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