CN109462246A - A kind of calculation method of energy-accumulating power station scheduling cost - Google Patents
A kind of calculation method of energy-accumulating power station scheduling cost Download PDFInfo
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- CN109462246A CN109462246A CN201811116264.8A CN201811116264A CN109462246A CN 109462246 A CN109462246 A CN 109462246A CN 201811116264 A CN201811116264 A CN 201811116264A CN 109462246 A CN109462246 A CN 109462246A
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- accumulating power
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- 238000004364 calculation method Methods 0.000 title claims abstract description 15
- 238000007599 discharging Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 12
- 238000005457 optimization Methods 0.000 abstract description 4
- 230000032683 aging Effects 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000012983 electrochemical energy storage Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000005955 Ferric phosphate Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229940032958 ferric phosphate Drugs 0.000 description 1
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 1
- 229910000399 iron(III) phosphate Inorganic materials 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of calculation methods of energy-accumulating power station scheduling cost, solve the optimization problem of energy-accumulating power station scheduling cost calculation precision, this method comprehensively considers the elements such as charge-discharge magnification, environment temperature, charge and discharge number, the charge and discharge duration of battery, using battery system SOH as the foundation for calculating remaining life, the battery system current residual service life can be accurately obtained, and then builds energy-accumulating power station scheduling cost model.The present invention can accurately obtain the battery system current residual service life using battery system SOH as the foundation for calculating its remaining life, calculate energy-accumulating power station and dispatch cost, the present invention is suitable for the energy-accumulating power station being made of electrochemical cell.
Description
Technical field
The invention belongs to energy-accumulating power station cost calculation fields, and in particular to a kind of calculating side of energy-accumulating power station scheduling cost
Method.
Background technique
Energy-accumulating power station includes power dispatching center and multiple battery systems, and higher level's power grid is assigned at energy storage power dispatching center
Scheduler task distribute to each battery system, an independent battery system includes energy accumulation current converter (PCS), battery management system
(BMS) and multiple battery packs (BP), battery pack is mainly used for storing electric energy, according to scheduler task to battery in organizing carry out charging or
Electric discharge, and worked independently from each other between battery system.After power grid issues scheduler task to energy-accumulating power station, the latter is according to each battery system
System state assignment scheduler task.
The scheduling cost model of energy-accumulating power station is built, and subsequent Optimized Operation is run most important.It calculates at present solid
Determining method used by cost is to judge its remaining life according to the charge and discharge number of battery system, thus builds energy-accumulating power station tune
Spend cost model, this method do not consider the charge-discharge magnification of battery, environment temperature, whether the factors such as complete charge and discharge, cause
Obtained battery system remaining life is not accurate enough, and there are certain errors.
Summary of the invention
The purpose of the present invention is to provide a kind of calculation methods of energy-accumulating power station scheduling cost, solve existing energy-accumulating power station
Dispatch cost calculation precision optimization problem.
Realize the technical solution of the object of the invention are as follows: a kind of calculation method of energy-accumulating power station scheduling cost, energy-accumulating power station
Dispatching cost includes O&M cost, cost depletions and fixed cost, and expression formula is as follows:
C=Cfix+Closs+Cf
In formula, C is scheduling cost, CfixFor O&M cost, ClossFor cost depletions, CfFor fixed cost；
The fixed cost expression formula are as follows:
In formula,SOH value before indicating i-th of battery system scheduling,Indicate i-th of battery system scheduling
SOH value afterwards,Indicate the SOH upper limit value of i-th of battery system,Under the SOH for indicating i-th of battery system
Limit value,Indicate the investment construction cost of i-th of battery system.
Further, O&M cost expression formula is as follows:
In formula, T indicates scheduling duration,Indicate the O&M cost coefficient of i-th of battery system, PiIndicate i-th of battery
The schedule power of system, n indicate battery system number in energy-accumulating power station.
Further, cost depletions expression formula is as follows:
In formula,Indicate the electric energy loss coefficient of i-th of battery system,Indicate i-th of battery system charge efficiency,Indicate i-th of battery system discharging efficiency.
Compared with prior art, the invention has the benefit that the present invention proposes a kind of meter of energy-accumulating power station scheduling cost
Calculation method, O&M cost and cost depletions are calculated by scheduling times, and fixed cost is calculated by its degree of aging, solve energy storage
The optimization problem of power station scheduling cost calculation precision；The present invention comprehensively considers the charge-discharge magnification of battery, environment temperature, charge and discharge
The elements such as electric number, charge and discharge duration can accurately obtain electricity using battery system SOH as the foundation for calculating remaining life
The cell system current residual service life, and then build energy-accumulating power station scheduling cost model；Sentence compared to battery charging and discharging number is only relied on
Break the method for its degree of aging, the present invention is more accurate to the calculating of battery system.
Detailed description of the invention
Fig. 1 is energy-accumulating power station structural schematic diagram.
Specific embodiment
The present invention provides a kind of calculation method of energy-accumulating power station scheduling cost, and O&M cost and cost depletions are by scheduling time
Number calculates, and fixed cost is calculated by its degree of aging, solves the optimization problem of energy-accumulating power station scheduling cost calculation precision；Energy
The no scheduling cost for accurately calculating energy-accumulating power station is formulated subsequent energy-accumulating power station scheduling strategy most important.It calculates at present
Method used by fixed cost is to judge its remaining life according to the charge and discharge number of battery system, thus builds energy-accumulating power station
Dispatch cost model, this method do not consider the charge-discharge magnification of battery, environment temperature, whether the factors such as complete charge and discharge, lead
Cause obtained battery system remaining life not accurate enough, there are certain errors.The present invention comprehensively consider battery charge-discharge magnification,
The elements such as environment temperature, charge and discharge number, charge and discharge duration, with battery system cell health state (State of Health,
SOH) as the foundation for calculating remaining life, the battery system current residual service life can be accurately obtained, and then builds energy storage electricity
It stands and dispatches cost model.Compared to the method for only relying on battery charging and discharging number and judging its degree of aging, the present invention is to battery system
The calculating of system is more accurate.
Application of the invention is electrochemical energy storage power station, and structural schematic diagram is as shown in Figure 1, the energy-accumulating power station includes
Multiple battery systems, battery system include energy accumulation current converter (PCS), battery management system (BMS) and multiple battery packs (BP).
After energy-accumulating power station receives the scheduler task that higher level's power grid issues, task allocation plan is formulated, under each battery system
It sends out scheduler task respective, scheduling cost can be brought when energy-accumulating power station executes scheduler task, including O&M cost, loss
Cost and fixed cost.
Energy-accumulating power station needs to carry out necessary maintenance and maintenance to relevant device after putting into operation, improves power station operation
Reliability, resulting cost is denoted as the operation expense of energy-accumulating power station, is shown below:
In formula, CfixIndicate O&M cost；T indicates scheduling duration；Indicate the O&M cost system of i-th of battery system
Number；PiIndicate the schedule power of i-th of battery system；N indicates battery system number in energy-accumulating power station.
Since battery system has certain loss in charge and discharge process, and the equipment such as transformer can also generate in operation
Loss, is denoted as cost depletions for such loss bring cost herein, and consider respectively in charge and discharge process, such as following formula institute
Show:
In formula, ClossIndicate cost depletions；Indicate electric energy loss coefficient；Indicate i-th of battery system charging effect
Rate；Indicate i-th of battery system discharging efficiency.Wherein, schedule power is timing, indicates battery charging；Schedule power is negative
When, indicate battery discharge.
After energy-accumulating power station puts into operation, battery system can carry out charge or discharge with power dispatching, and battery is filling
In discharge process, SOH can gradually decay, until being down to a certain particular valueAfterwards, it is believed that the battery system can not continue
Scheduler task is completed, is needed replacing.The investment construction cost of battery system is denoted as fixed cost, and fixed cost is uniformly divided
During cloth is decayed to battery system SOH, it is denoted as fixed cost waste, is shown below:
In formula,SOH value before indicating i-th of battery system scheduling；Indicate i-th of battery system scheduling
SOH value afterwards；Indicate the SOH upper limit value of i-th of battery system；Under the SOH for indicating i-th of battery system
Limit value；Indicate the investment construction cost of i-th of battery system.
To sum up, the scheduling cost of energy-accumulating power station is calculated:
The following describes the present invention in detail with reference to examples.
Embodiment
The application of the present embodiment is the electrochemical energy storage power station being made of ferric phosphate lithium cell, energy-accumulating power station schematic diagram
As shown in Figure 1, wherein battery system number n takes 4, i.e., energy-accumulating power station is containing there are four independent battery systems in the present embodiment.The storage
Energy power station relevant parameter value is as shown in table 1.
1 case energy-accumulating power station relevant parameter of table
After energy-accumulating power station receives scheduler task, energy storage power dispatching center analysis obtains task allocation plan, to four
Battery system distributes respective scheduler task.Assuming that each battery system receives electric discharge task, discharge power value is followed successively by
100kW, 80kW, 70kW, 50kW, electric discharge duration is 1h, and discharge time takes 1 time.By statistics, obtains each battery system and execute
SOH value is followed successively by 79.96%, 69.95%, 59.93%, 49.94% after scheduler task, and above data is substituted into following formula:
Obtain the energy-accumulating power station this scheduling cost be about 1038 yuan.
Claims (3)
1. a kind of calculation method of energy-accumulating power station scheduling cost, which is characterized in that the scheduling cost of energy-accumulating power station include O&M at
Originally, cost depletions and fixed cost, expression formula are as follows:
C=Cfix+Closs+Cf
In formula, C is scheduling cost, CfixFor O&M cost, ClossFor cost depletions, CfFor fixed cost；
The fixed cost expression formula are as follows:
In formula,SOH value before indicating i-th of battery system scheduling,After indicating i-th of battery system scheduling
SOH value,Indicate the SOH upper limit value of i-th of battery system,Indicate the SOH lower limit value of i-th of battery system,
fi BIndicate the investment construction cost of i-th of battery system.
2. the calculation method of energy-accumulating power station scheduling cost according to claim 1, which is characterized in that O&M cost expression formula
It is as follows:
In formula, T indicates scheduling duration,Indicate the O&M cost coefficient of i-th of battery system, PiIndicate i-th of battery system
Schedule power, n indicate energy-accumulating power station in battery system number.
3. the calculation method of energy-accumulating power station scheduling cost according to claim 2, which is characterized in that cost depletions expression formula
It is as follows:
In formula, Ki lIndicate the electric energy loss coefficient of i-th of battery system, ηi cIndicate i-th of battery system charge efficiency, ηi dTable
Show i-th of battery system discharging efficiency.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111539619A (en) * | 2020-04-21 | 2020-08-14 | 中国电力科学研究院有限公司 | Energy storage power station operation method and system for providing auxiliary service |
| CN111539620A (en) * | 2020-04-21 | 2020-08-14 | 中国电力科学研究院有限公司 | An energy storage operation method and system for providing energy services |
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- 2018-09-25 CN CN201811116264.8A patent/CN109462246A/en active Pending
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| CN103001331A (en) * | 2012-11-13 | 2013-03-27 | 中国电力科学研究院 | An economical optimal dispatching method for energy storage power stations |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111539619A (en) * | 2020-04-21 | 2020-08-14 | 中国电力科学研究院有限公司 | Energy storage power station operation method and system for providing auxiliary service |
| CN111539620A (en) * | 2020-04-21 | 2020-08-14 | 中国电力科学研究院有限公司 | An energy storage operation method and system for providing energy services |
| CN111539620B (en) * | 2020-04-21 | 2022-08-05 | 中国电力科学研究院有限公司 | Energy storage operation method and system for providing energy service |
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Application publication date: 20190312 |