CN114094611B - Energy storage power station power instruction distribution method and system considering SOC consistency - Google Patents
Energy storage power station power instruction distribution method and system considering SOC consistency Download PDFInfo
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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
- H02J3/28—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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- 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
- H02J15/00—Systems for storing electric energy
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
- H02J3/241—The oscillation concerning frequency
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
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Abstract
The invention discloses a method and a system for distributing power instructions of an energy storage power station considering SOC consistency, wherein the method comprises the following steps: if the primary frequency modulation command and the AGC power adjustment control command exceed the total station available power, correcting the values of the primary frequency modulation command and the AGC power adjustment control command into the total station available power; otherwise, obtaining the difference value between the current SOC value of each PCS corresponding to the battery stack of the energy storage station and a preset target SOC value, and determining the charge/discharge power command distributed by each PCS based on the primary frequency modulation command, the AGC power adjustment control command and the difference value. The invention aims to realize further fine control of the battery SOC, realize convergence adjustment of the SOCs of all battery stacks with different initial SOCs by participating in daily charge and discharge, namely further improve the consistency of the SOCs of all battery stacks, and simultaneously carry out SOC adjustment for meeting the requirements of full capacity response power grid peak regulation and valley filling.
Description
Technical Field
The invention belongs to the technical field of power systems, and particularly relates to a method and a system for distributing power instructions of an energy storage power station considering SOC consistency.
Background
Along with the proposal of a novel power system construction strategy, the large-scale development of energy storage technology becomes a main means for compensating the randomness and fluctuation of the power generation of high-proportion new energy, so that the construction of the power grid side energy storage station is greatly developed in recent years. However, as the operation time of the energy storage power station is accumulated, the control effect of the SOC of the energy storage power station becomes a main influencing factor for restricting the power capability of the energy storage power station. Due to unreasonable PCS power distribution logic, the different PCS calls the battery energy unevenly, and the battery characteristics discover larger separation characteristics over time; on the other hand, due to unreasonable power distribution logic, the power distribution of each PCS does not fully consider the state of the current battery stack SOC, resulting in the individual battery stack SOC reaching its upper or lower limit prematurely, thereby limiting the full station functional regulation capability.
Currently, the more common power command allocation methods have an average allocation, or a weighted allocation logic according to the PCS available capacity allocation, and considering the SOC constraint and the available power constraint. However, the above logic is generally insufficient in comprehensive consideration of the state of the battery SOC and the operation state of the energy storage station, and is not further refined and considered by combining the charge and discharge instructions according to the operation period in which the energy storage station is located and the SOC control target. For example Yu et al large battery energy storage power station system operation control strategy study [ J ]. Power supply, 2021, 38 (3): 78-83, providing a power mode which can adopt a proportional distribution and battery charge state optimization control mode, wherein the proportional control mode is distributed according to the proportion of available power of each PCS, and the SOC difference of each battery stack cannot be considered, so that some battery stacks can be easily caused to reach the charge-forbidden and discharge-forbidden boundary; the basic idea of the method is that the PCS with high SOC and large available power bears more power regulation tasks, and compared with a simple available power method, the strategy of the method is relatively more perfect, but the performance of the method depends on the determination of a weighted value, and the difference of control targets of the SOC under different modes of charge and discharge is not considered. The Chinese patent document with publication number of CN 112103979A discloses a coordinated control method of a comprehensive energy storage system, mainly by establishing a cycle life model of an energy storage battery, the comprehensive cost of the energy storage battery is optimal and the service life of the energy storage battery is longest, but the comprehensive cost is considered, the power of the battery participating in charging and discharging is limited, the full response to the power demand of a power grid cannot be realized, and the supporting effect of an energy storage power station on the power grid is not facilitated. However, the above methods only carry out strategy design on the PCS power from the perspective of the battery body, and cannot fully consider the storage requirement of the energy storage power station for the total quantity of the battery and the control requirement of the equalization of the SOC of each battery stack when participating in the peak clipping and valley filling of the power grid.
Disclosure of Invention
The invention aims to solve the technical problems: aiming at the problems in the prior art, the invention provides a method and a system for distributing power instructions of an energy storage power station for considering the consistency of the SOC, which aim to realize further refined control of the battery SOC, realize convergence adjustment of the SOC of each battery stack with different initial SOCs by participating in daily charge and discharge, namely further improve the consistency of the SOCs of each battery stack, and simultaneously carry out SOC adjustment for meeting the requirements of full capacity response power grid peak regulation and valley filling.
In order to solve the technical problems, the invention adopts the following technical scheme:
the energy storage power station power instruction distribution method considering the consistency of the SOC comprises the steps of generating charge/discharge power instructions distributed by each PCS in a peak shaving operation reserve interval:
1) Acquiring a primary frequency modulation instruction and an AGC power adjustment control instruction P;
2) Primary frequency modulation instruction, AGC power regulation control instruction and total station available power P ab By comparison, if primary frequency modulation command, AGC power adjustment control command, P, exceeds total station available power, P ab The value of the primary frequency modulation command, AGC power adjustment control command, P, is modified to the total station available power, P ab ；
3) Acquiring current SOC values SOC of battery stacks corresponding to PCS of energy storage station i And a preset target SOC value SOC tf Difference ΔSOC between i Based on primary frequency modulation command, AGC power adjustment control command P and difference delta SOC i The charge/discharge power command assigned by each PCS is determined.
Optionally, step 3) is based on a primary frequency modulation command, an AGC power adjustment control command P, a difference ΔSOC i When determining the charge/discharge power command allocated to each PCS, if the primary frequency modulation command and the AGC power adjustment control command P are charging commands, the charging power command allocated to any PCS is:
in the above, P ci Charging power command, ΔSOC, assigned to the PCS i And for the current SOC value of the corresponding cell stack of the PCS, n is the number of the PCS, and P is a primary frequency modulation command and an AGC power regulation control command.
Optionally, step 3) is based on a primary frequency modulation command, AGC power adjustment control command P c Difference delta SOC i When determining the charge/discharge power command allocated by each PCS, if the primary frequency modulation command and the AGC power adjustment control command P c When the discharge command is a discharge command, the discharge power command allocated to any PCS is as follows:
in the above, P di Discharge power command Δsoc assigned to the PCS i And for the current SOC value of the corresponding cell stack of the PCS, n is the number of the PCS, and P is a primary frequency modulation command and an AGC power regulation control command.
Optionally, the method includes the step of generating charge/discharge power commands for each PCS allocation in the valley-fill operation reserve interval:
s1) acquiring a primary frequency modulation instruction and an AGC power adjustment control instruction P;
s2) one time adjustingFrequency command, AGC power adjustment control command P and total station available power P ab By comparison, if primary frequency modulation command, AGC power adjustment control command, P, exceeds total station available power, P ab The value of the primary frequency modulation command, AGC power adjustment control command, P, is modified to the total station available power, P ab Ending and exiting; otherwise, jumping to the next step;
s3) obtaining the current SOC value SOC of each PCS corresponding to the battery stack of the energy storage station i And a preset target SOC value SOC tg Difference ΔSOC between i Based on primary frequency modulation command, AGC power adjustment control command P and difference delta SOC i The charge/discharge power command assigned by each PCS is determined.
Optionally, step S3) is based on a primary frequency modulation command, an AGC power adjustment control command P, a difference Δsoc i When determining the charge/discharge power command allocated to each PCS, if the primary frequency modulation command and the AGC power adjustment control command P are charging commands, the charging power command allocated to any PCS is:
in the above, P ci Charging power command, ΔSOC, assigned to the PCS i And for the current SOC value of the corresponding cell stack of the PCS, n is the number of the PCS, and P is a primary frequency modulation command and an AGC power regulation control command.
Optionally, step S3) is based on a primary frequency modulation command, AGC power adjustment control command P c Difference delta SOC i When determining the charge/discharge power command allocated by each PCS, if the primary frequency modulation command and the AGC power adjustment control command P c When the discharge command is a discharge command, the discharge power command allocated to any PCS is as follows:
in the above, P di Discharge power command Δsoc assigned to the PCS i Current SOC for the corresponding cell stack for the PCSThe value n is the number of PCS, and P is a primary frequency modulation instruction and an AGC power adjustment control instruction.
Optionally, step 3) or step S3) further comprises: and respectively comparing the charge/discharge power command distributed by each PCS with the maximum available power of the charge/discharge power command, obtaining an overload PCS with the distributed charge/discharge power command exceeding the maximum available power and an insufficient-load PCS with the distributed charge/discharge power command smaller than the maximum available power, traversing the overload PCS, respectively calculating the difference between the distributed charge/discharge power command and the maximum available power of the current PCS obtained by traversing to obtain a power difference delta P of the current PCS, and distributing the power difference delta P of the current PCS to the insufficient-load PCS.
Alternatively, the allocation of the power difference Δp of the current PCS to the insufficient load PCS means: a1 Selecting one distributed charge/discharge power instruction from all the insufficient load PCS and the insufficient load PCS with the largest difference between the maximum available power to obtain the distributed charge/discharge power instruction of the insufficient load PCS and the difference delta P between the maximum available power j The method comprises the steps of carrying out a first treatment on the surface of the A2 Distribution of the power difference Δp of the current PCS to be not more than the difference Δp j Partially giving the insufficient load PCS; a3 According to DeltaDeltaP) =Δp- Δp j Calculating the residual power difference delta P to be distributed, if the residual power difference delta P to be distributed is larger than or equal to 0, taking the residual power difference delta P to be distributed as the new power difference delta P of the current PCS, and skipping to the step A1); otherwise, the power difference delta P of the current PCS is judged to be distributed.
In addition, the invention also provides an energy storage power station power instruction distribution system for taking the SOC into consideration, which comprises a microprocessor and a memory which are connected with each other, wherein the microprocessor is programmed or configured to execute the steps of the energy storage power station power instruction distribution method for taking the SOC into consideration.
Furthermore, the present invention provides a computer readable storage medium having stored therein a computer program for execution by a computer device to perform the steps of the energy storage plant power instruction allocation method accounting for SOC consistency.
Compared with the prior art, the invention has the following advantages: the invention fully considers the requirements of different running periods of the battery on the SOC control target and the requirements of consistency and balance of each battery stack, and adjusts the total quantity and balance of the SOC in the process of participating in primary frequency modulation and AGC adjustment of the power grid, so as to make battery SOC storage in advance for meeting the continuous power output of peak regulation and valley filling. The special battery SOC maintenance of each battery stack is required to be carried out independently when the energy storage power station participates in peak shaving and valley filling of the power grid, the time period of the energy storage power station participating in primary frequency modulation and AGC regulation of the power grid can be effectively widened, and meanwhile, the consistency of each battery stack is improved.
Drawings
FIG. 1 is a schematic general flow chart of a method according to an embodiment of the invention.
Detailed Description
Referring to fig. 1, the method for allocating power instructions of an energy storage power station for SOC consistency according to the present embodiment includes the steps of generating charge/discharge power instructions allocated by each PCS in a peak shaver operation reserve interval:
1) Acquiring a primary frequency modulation instruction and an AGC power adjustment control instruction P;
2) Primary frequency modulation instruction, AGC power regulation control instruction and total station available power P ab By comparison, if primary frequency modulation command, AGC power adjustment control command, P, exceeds total station available power, P ab The value of the primary frequency modulation command, AGC power adjustment control command, P, is modified to the total station available power, P ab ；
3) Acquiring current SOC values SOC of battery stacks corresponding to PCS of energy storage station i And a preset target SOC value SOC tf Difference ΔSOC between i Based on primary frequency modulation command, AGC power adjustment control command P and difference delta SOC i The charge/discharge power command assigned by each PCS is determined.
It should be noted that, in the flowchart in fig. 1, the current SOC value SOC of the battery stack corresponding to each PCS of the energy storage station is to be obtained i And a preset target SOC value SOC tf Difference ΔSOC between i Pretreatment, but in practice, the result is used only in step 3), so it can be as desiredThe pre-processing is selected or embedded in step 3).
Referring to fig. 1, in step 3) of the present embodiment, the primary frequency modulation command, the AGC power adjustment control command P, and the difference Δsoc are based on i When determining the charge/discharge power command allocated to each PCS, if the primary frequency modulation command and the AGC power adjustment control command P are charging commands, the charging power command allocated to any PCS is:
in the above, P ci Charging power command, ΔSOC, assigned to the PCS i And for the current SOC value of the corresponding cell stack of the PCS, n is the number of the PCS, and P is a primary frequency modulation command and an AGC power regulation control command.
Referring to fig. 1, in step 3) of the present embodiment, the AGC power adjustment control command P is based on the primary frequency modulation command c Difference delta SOC i When determining the charge/discharge power command allocated by each PCS, if the primary frequency modulation command and the AGC power adjustment control command P c When the discharge command is a discharge command, the discharge power command allocated to any PCS is as follows:
in the above, P di Discharge power command Δsoc assigned to the PCS i And for the current SOC value of the corresponding cell stack of the PCS, n is the number of the PCS, and P is a primary frequency modulation command and an AGC power regulation control command.
Referring to fig. 1, the present embodiment further includes the step of generating charge/discharge power commands for each PCS allocation in the valley-fill operation reserve interval:
s1) acquiring a primary frequency modulation instruction and an AGC power adjustment control instruction P;
s2) the primary frequency modulation instruction, the AGC power adjustment control instruction and the total station available power P ab By comparison, if primary frequency modulation command, AGC power adjustment control command, P, exceeds total station available power, P ab Will be oneThe value of the secondary frequency modulation command and AGC power adjustment control command P is corrected to the total station available power P ab Ending and exiting; otherwise, jumping to the next step;
s3) obtaining the current SOC value SOC of each PCS corresponding to the battery stack of the energy storage station i And a preset target SOC value SOC tg Difference ΔSOC between i Based on primary frequency modulation command, AGC power adjustment control command P and difference delta SOC i The charge/discharge power command assigned by each PCS is determined.
Referring to fig. 1, in step S3) of the present embodiment, the primary frequency modulation command, the AGC power adjustment control command P, and the difference Δsoc are based on i When determining the charge/discharge power command allocated to each PCS, if the primary frequency modulation command and the AGC power adjustment control command P are charging commands, the charging power command allocated to any PCS is:
in the above, P ci Charging power command, ΔSOC, assigned to the PCS i And for the current SOC value of the corresponding cell stack of the PCS, n is the number of the PCS, and P is a primary frequency modulation command and an AGC power regulation control command.
Referring to fig. 1, in step S3) of the present embodiment, the AGC power adjustment control command P is based on the primary frequency modulation command c Difference delta SOC i When determining the charge/discharge power command allocated by each PCS, if the primary frequency modulation command and the AGC power adjustment control command P c When the discharge command is a discharge command, the discharge power command allocated to any PCS is as follows:
in the above, P di Discharge power command Δsoc assigned to the PCS i And for the current SOC value of the corresponding cell stack of the PCS, n is the number of the PCS, and P is a primary frequency modulation command and an AGC power regulation control command.
Referring to FIG. 1, the method of the present embodiment is an energy storage power stationThe operation time section is divided into a peak shaving operation reserve section (a period between the last peak shaving operation and the next peak shaving operation) and a valley shaving operation reserve section (a period between the last peak shaving operation and the next valley shaving operation); SOC control target SOC for setting peak shaving operation reserve interval tf SOC control target SOC for setting valley-fill operation reserve interval tg The method comprises the steps of carrying out a first treatment on the surface of the Acquiring the current SOC value of each PCS corresponding to the battery stack of the energy storage station, and recording the current SOC value as SOC i There is typically an SOC tg <SOC i <SOC tf The method comprises the steps of carrying out a first treatment on the surface of the Acquiring current SOC values SOC of battery stacks corresponding to PCS of energy storage station i And a preset target SOC value SOC tf Difference ΔSOC between i This can be expressed as: ΔSOC (delta SOC) i ＝SOC tf -SOC i The method comprises the steps of carrying out a first treatment on the surface of the Acquiring current SOC values SOC of battery stacks corresponding to PCS of energy storage station i And a preset target SOC value SOC tg Difference ΔSOC between i This can be expressed as: ΔSOC (delta SOC) i ＝SOC i -SOC tg The method comprises the steps of carrying out a first treatment on the surface of the The obtained primary frequency modulation instruction, AGC control instruction P and total station available power P ab By comparison, if the primary frequency modulation command and the AGC control command P do not exceed the total station available power P ab The inconvenience of maintaining the current power instruction; if primary frequency modulation instruction and AGC control instruction P exceed total station available power P ab Correcting the primary frequency modulation command and AGC control command P to the total station available power P ab . The power distribution logic described above may then be executed in accordance with the operating segment in which the energy storage power station is located.
The above power allocation command also needs to consider the current available power constraint of each PCS, that is, when the power allocated according to the SOC exceeds the current available power, the PCS power command is the maximum available power, and at this time, the insufficient power is lacked and is borne by the remaining available power in other PCS to be the maximum, until the power responses of all PCS meet the total primary frequency modulation or AGC power command. Referring to fig. 1, step 3) or step S3) of the present embodiment further includes: and respectively comparing the charge/discharge power command distributed by each PCS with the maximum available power of the charge/discharge power command, obtaining an overload PCS with the distributed charge/discharge power command exceeding the maximum available power and an insufficient-load PCS with the distributed charge/discharge power command smaller than the maximum available power, traversing the overload PCS, respectively calculating the difference between the distributed charge/discharge power command and the maximum available power of the current PCS obtained by traversing to obtain a power difference delta P of the current PCS, and distributing the power difference delta P of the current PCS to the insufficient-load PCS.
Referring to fig. 1, the allocation of the power difference Δp of the current PCS to the insufficient load PCS as described in the present embodiment means: a1 Selecting one distributed charge/discharge power instruction from all the insufficient load PCS and the insufficient load PCS with the largest difference between the maximum available power to obtain the distributed charge/discharge power instruction of the insufficient load PCS and the difference delta P between the maximum available power j The method comprises the steps of carrying out a first treatment on the surface of the A2 Distribution of the power difference Δp of the current PCS to be not more than the difference Δp j Partially giving the insufficient load PCS; a3 According to DeltaDeltaP) =Δp- Δp j Calculating the residual power difference delta P to be distributed, if the residual power difference delta P to be distributed is larger than or equal to 0, taking the residual power difference delta P to be distributed as the new power difference delta P of the current PCS, and skipping to the step A1); otherwise, the power difference delta P of the current PCS is judged to be distributed.
In this embodiment, a certain energy storage station has three PCS, and is currently in a peak shaving reserve operation area, and the SOC peak shaving target SOCtf is set to 90%. Each parameter is set as shown in table 1, and there are 3 PCS and corresponding battery energy storage units, each PCS has maximum chargeable/dischargeable power, and the SOC of each battery energy storage unit is different. The AGC issued power is output 100kW, and the power distribution to PCS under different algorithms is calculated.
Table 1: and (5) energy storage control parameters.
The difference between each PCS and the target SOC is 30%, 40% and 50% respectively. According to the allocation strategy of the method of the present embodiment, the absorption power is 100kW, the charging power of pcs1 is pc1=0.3/1.2×100=25 kW; the charging power of PCS2 is pc2=0.4/1.2×100=33.33 kW; the charging power of PCS3 is pc3=0.5/1.2×100=41.66 kW. Currently, the cell capacities of the cell stacks of each PCS are 60kWh, 50kWh, and 40kWh, and if the cell stacks are charged for 1 hour according to the current power distribution command, the electric quantity of each PCS cell stack is changed to 85kWh, 83.33kWh, and 81.66kWh. If the calculation method of 78-83 is adopted according to the prior art (Yu, etc. the research on the operation control strategy of the large-scale battery energy storage power station system [ J ] power supply and power consumption, 2021, 38 (3)), the power values of the PCS are 35.29kW,35.29kW and 29.42kW respectively. After 1 hour of charging, each PCS corresponds to a stack charge of 95.29kWh, 85.29kWh, 69.42kWh. It can be seen that over time, according to the prior art (Yu et al. Large battery energy storage power station system operation control strategy study [ J ]. Power supply, 2021, 38 (3): 78-83 ]) calculation method, PCS1 will quickly reach its upper SOC limit, resulting in failure to provide charge power capacity, the overall station power will be limited first, while the SOC of PCS will be pulled a large distance from the SOC of PCS1, PCS2, while according to the proposed method of the present embodiment method, the battery SOCs of each PCS will gradually converge, and the power capacity will not prematurely reach its upper limit (lower limit) due to a certain stack SOC, thus limiting the power regulation capability of the overall station.
In addition, the embodiment also provides an energy storage power station power instruction distribution system for taking the SOC consistency into account, which comprises a microprocessor and a memory which are connected with each other, wherein the microprocessor is programmed or configured to execute the steps of the energy storage power station power instruction distribution method for taking the SOC consistency into account. Furthermore, the present embodiment also provides a computer-readable storage medium having stored therein a computer program for execution by a computer device to implement the steps of the aforementioned energy storage power station power instruction allocation method taking into account SOC consistency.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-readable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks. These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks. These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (9)
1. The power instruction distribution method of the energy storage power station considering the consistency of the SOC is characterized by comprising the steps of generating charge/discharge power instructions distributed by each PCS in a peak shaving operation reserve interval:
1) Acquiring a primary frequency modulation instruction and an AGC power adjustment control instruction P;
2) Primary frequency modulation instruction, AGC power regulation control instruction and total station available power P ab By comparison, if primary frequency modulation command, AGC power adjustment control command, P, exceeds total station available power, P ab The value of the primary frequency modulation command, AGC power adjustment control command, P, is modified to the total station available power, P ab ；
3) Acquiring current SOC values SOC of battery stacks corresponding to PCS of energy storage station i And a preset target SOC value SOC tf Difference ΔSOC between i Based on primary frequency modulation command, AGC power adjustment control command P and difference delta SOC i Determining charge/discharge power instructions allocated by each PCS;
based on primary frequency modulation instruction and AGC power adjustment control instruction P in step 3) c Difference delta SOC i When determining the charge/discharge power command allocated by each PCS, if the primary frequency modulation command and the AGC power adjustment control command P c When the discharge command is a discharge command, the discharge power command allocated to any PCS is as follows:
in the above, P di Discharge power command Δsoc assigned to the PCS i Current SOC value of corresponding battery stack for the PCS i And a preset target SOC value SOC tf The difference value, n is the number of PCS, P is primary frequency modulation instruction and AGC power regulation control instruction.
2. The method for distributing power commands for an energy storage power station according to claim 1, wherein the step 3) is based on a primary frequency modulation command, an AGC power adjustment control command P, a difference Δsoc i When determining the charge/discharge power command allocated to each PCS, if the primary frequency modulation command and the AGC power adjustment control command P are charging commands, the charging power command allocated to any PCS is:
in the above, P ci Charging power command, ΔSOC, assigned to the PCS i Current SOC value of corresponding battery stack for the PCS i And a preset target SOC value SOC tf The difference value, n is the number of PCS, P is primary frequency modulation instruction and AGC power regulation control instruction.
3. The method of claim 2, further comprising the step of generating charge/discharge power commands for each PCS allocation during a valley fill reserve interval:
s1) acquiring a primary frequency modulation instruction and an AGC power adjustment control instruction P;
s2) the primary frequency modulation instruction, the AGC power adjustment control instruction and the total station available power P ab By comparison, if primary frequency modulation command, AGC power adjustment control command, P, exceeds total station available power, P ab The value of the primary frequency modulation command, AGC power adjustment control command, P, is modified to the total station available power, P ab Ending and exiting; otherwise, jumping to the next step;
s3) obtaining the current SOC value SOC of each PCS corresponding to the battery stack of the energy storage station i And a preset target SOC value SOC tg Difference ΔSOC between i Based on primary frequency modulation command, AGC power adjustment control command P and difference delta SOC i The charge/discharge power command assigned by each PCS is determined.
4. The method for power command distribution for an energy storage plant according to claim 3, wherein the step S3) is based on a primary frequency modulation command, an AGC power adjustment control command P, a difference Δsoc i Determining the allocation of PCSIn the charge/discharge power instruction, if the primary frequency modulation instruction and the AGC power adjustment control instruction P are charging instructions, the charging power instruction allocated to any PCS is:
in the above, P ci Charging power command, ΔSOC, assigned to the PCS i Current SOC value of corresponding battery stack for the PCS i And a preset target SOC value SOC tf The difference value, n is the number of PCS, P is primary frequency modulation instruction and AGC power regulation control instruction.
5. The method for power command distribution for an energy storage power station according to claim 4, wherein the step S3) is based on a primary frequency modulation command and an AGC power adjustment control command P c Difference delta SOC i When determining the charge/discharge power command allocated by each PCS, if the primary frequency modulation command and the AGC power adjustment control command P c When the discharge command is a discharge command, the discharge power command allocated to any PCS is as follows:
in the above, P di Discharge power command Δsoc assigned to the PCS i Current SOC value of corresponding battery stack for the PCS i And a preset target SOC value SOC tf The difference value, n is the number of PCS, P is primary frequency modulation instruction and AGC power regulation control instruction.
6. The method for distributing power commands to an energy storage power station in view of SOC uniformity as set forth in claim 5, further comprising, after step 3) or step S3): and respectively comparing the charge/discharge power command distributed by each PCS with the maximum available power of the charge/discharge power command, obtaining an overload PCS with the distributed charge/discharge power command exceeding the maximum available power and an insufficient-load PCS with the distributed charge/discharge power command smaller than the maximum available power, traversing the overload PCS, respectively calculating the difference between the distributed charge/discharge power command and the maximum available power of the current PCS obtained by traversing to obtain a power difference delta P of the current PCS, and distributing the power difference delta P of the current PCS to the insufficient-load PCS.
7. The method for assigning power commands to an energy storage plant that accounts for SOC uniformity according to claim 6, wherein said assigning a power difference Δp for a current PCS to an insufficient load PCS is: a1 Selecting one distributed charge/discharge power instruction from all the insufficient load PCS and the insufficient load PCS with the largest difference between the maximum available power to obtain the distributed charge/discharge power instruction of the insufficient load PCS and the difference delta P between the maximum available power j The method comprises the steps of carrying out a first treatment on the surface of the A2 Distribution of the power difference Δp of the current PCS to be not more than the difference Δp j Partially giving the insufficient load PCS; a3 According to DeltaDeltaP) =Δp- Δp j Calculating the residual power difference delta P to be distributed, if the residual power difference delta P to be distributed is larger than or equal to 0, taking the residual power difference delta P to be distributed as the new power difference delta P of the current PCS, and skipping to the step A1); otherwise, the power difference delta P of the current PCS is judged to be distributed.
8. An SOC-consistency-taking-up energy storage power plant power instruction distribution system comprising a microprocessor and a memory interconnected, wherein the microprocessor is programmed or configured to perform the steps of the SOC-consistency-taking-up energy storage power plant power instruction distribution method of any of claims 1 to 7.
9. A computer-readable storage medium having stored therein a computer program for execution by a computer device to perform the steps of the energy storage plant power instruction allocation method of any one of claims 1 to 7 that accounts for SOC uniformity.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102867977A (en) * | 2011-07-05 | 2013-01-09 | 中国科学院大连化学物理研究所 | All-vanadium redox flow energy storage battery system and subsystem power consistency adjustment method thereof |
| CN103187733A (en) * | 2011-12-31 | 2013-07-03 | 中国电力科学研究院 | Megawatt liquid flow battery energy storage power station real-time power control method and system thereof |
| CN106451505A (en) * | 2016-10-21 | 2017-02-22 | 许继集团有限公司 | Output regulation method and device for distributed energy storage system |
| CN109212420A (en) * | 2018-09-11 | 2019-01-15 | 深圳市科陆电子科技股份有限公司 | SOC modification method based on AGC frequency modulation energy-storage system |
| CN111756058A (en) * | 2019-03-29 | 2020-10-09 | 比亚迪股份有限公司 | Energy storage system charge-discharge power distribution method |
| CN113541174A (en) * | 2021-07-08 | 2021-10-22 | 国网湖南省电力有限公司 | Energy storage AGC PCS active power distribution method and system considering SOC sequencing |
-
2021
- 2021-11-23 CN CN202111397766.4A patent/CN114094611B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102867977A (en) * | 2011-07-05 | 2013-01-09 | 中国科学院大连化学物理研究所 | All-vanadium redox flow energy storage battery system and subsystem power consistency adjustment method thereof |
| CN103187733A (en) * | 2011-12-31 | 2013-07-03 | 中国电力科学研究院 | Megawatt liquid flow battery energy storage power station real-time power control method and system thereof |
| CN106451505A (en) * | 2016-10-21 | 2017-02-22 | 许继集团有限公司 | Output regulation method and device for distributed energy storage system |
| CN109212420A (en) * | 2018-09-11 | 2019-01-15 | 深圳市科陆电子科技股份有限公司 | SOC modification method based on AGC frequency modulation energy-storage system |
| CN111756058A (en) * | 2019-03-29 | 2020-10-09 | 比亚迪股份有限公司 | Energy storage system charge-discharge power distribution method |
| CN113541174A (en) * | 2021-07-08 | 2021-10-22 | 国网湖南省电力有限公司 | Energy storage AGC PCS active power distribution method and system considering SOC sequencing |
Non-Patent Citations (1)
| Title |
|---|
| 大规模储能电站参与电力***自动发电控制的协调控制策略优化研究;孟高军等;《可再生能源》;第39卷(第2期);第270-276页 * |
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