CN114069679B - Multiplying power control method, system and storage medium for lithium battery energy storage power station - Google Patents
Multiplying power control method, system and storage medium for lithium battery energy storage power station Download PDFInfo
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Abstract
The invention discloses a method, a system and a storage medium for controlling the multiplying power of a lithium battery energy storage power station, which are applied to the multiplying power based on the short-time high overload capacity characteristic of an energy storage unit of a lithium ion battery, and the control process comprises the following steps of: acquiring required input and output power, required duration, rated power of a lithium ion battery energy storage power station, rated power of a lithium ion battery energy storage unit, expected duration meeting the required input and output power and multiplying power of the lithium ion battery energy storage unit; based on the acquired data, the lithium ion battery energy storage power station is controlled to switch and operate in three modes of a high-rate overload mode, a conventional overload mode and an intelligent operation mode. By improving the redundant configuration of the energy storage converter, the multiplying power charging and discharging capacity of the lithium ion battery energy storage power station is improved under the condition of slightly increasing the cost of the energy storage power station; the whole cost of unit kilowatt in the active supporting process is reduced, and the flexibility adjusting capability of the energy storage power station is better utilized.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a multiplying power control method, a multiplying power control system and a storage medium for an active support type lithium battery energy storage power station.
Background
The electric power energy storage has the functions of smooth transition, peak clipping, valley filling, frequency modulation, voltage regulation and the like, and the electric power energy storage technology is a key link for solving the structural contradiction of an energy system. The energy storage power station can relieve the shortage of power supply, ensure energy safety, improve peak shaving and new energy utilization efficiency of a power system, and relieve a large amount of wind and light abandoning problems.
The energy storage technology based on the chemical battery has the advantages of relatively mature technology, high response speed, strong environmental adaptability and the like, and is an important development point of the electric energy storage technology at the present stage. Compared with other types of battery energy storage technologies, the lithium ion battery energy storage technology has the advantages of high charge and discharge efficiency, high charge and discharge speed, small volume, light weight and the like, and becomes an important technical route of the domestic electrochemical energy storage power station.
Unlike the electrical overload characteristic of conventional electrical equipment, the rate overload capability of an electrochemical cell has significant time characteristics due to a certain heat capacity, and is particularly characterized by strong short-time rate overload capability, long-time or heat balance state overload capability under the conditions of heat diffusion and safe operation, and weak rate overload capability. Considering the safety and multi-working condition operation of the lithium ion battery energy storage power station, the rated multiplying power of the current lithium ion battery is set according to the long-time working condition, and working conditions such as short-time power support and the like are not considered, namely, the overload capacity of the lithium ion energy storage power station for peak clipping and valley filling is determined according to the rated working condition. However, for the operation conditions of the active support type energy storage power station with more application, the operation conditions are usually non-rated conditions, the function and time parameters of the active support type energy storage power station are low in overall energy efficiency when the active support type energy storage power station is used for external regulation, the set capacity overload does not consider the characteristics of the active support time constant, such as second support, and the characteristics of the energy storage battery are not fully excavated. In addition, the redundant configuration of the energy storage converter (PCS) generally considers the active output of the direct current system, which is 150% of the rated power of the direct current system at the highest, and can not fully excavate the short-time high-rate overload capacity of the lithium ion battery under the condition of effectively meeting the dynamic nonfunctional requirement of the power station. Therefore, the unit kilowatt overall cost is higher when the active supporting working condition is operated, and the application economy of the lithium ion battery energy storage system in the stable operation of a novel power system taking new energy as a main body is affected.
The Chinese patent document CN104348256B discloses an energy management method of a multi-type battery energy storage power station considering charge and discharge multiplying power, wherein the patent calculates the characteristic value of charge or discharge multiplying power of each battery energy storage unit by reading related data of the battery energy storage power station in real time, calculates the initial power command value of each battery energy storage unit, judges whether the initial power command value of each battery energy storage unit exceeds the maximum allowable charge or discharge power of the unit in real time, determines the power command value of each battery energy storage unit by calculation and judgment, and gathers and outputs the power command value of each battery energy storage unit. And taking the charge and discharge multiplying power of each energy storage unit reasonably controlled as a target, and carrying out power coordination control and energy management in the energy storage power station. The patent considers the charge and discharge multiplying power of the battery, but belongs to passive balance, and does not consider the short-time high-multiplying power overload capacity of the energy storage battery, so that the potential of the lithium ion battery cannot be fully exerted.
The Chinese patent document CN109560562B discloses an energy storage power station peak regulation control method based on ultra-short-term load prediction, and the patent predicts the ultra-short-term load and corrects the load prediction curve in real time by acquiring a daily load curve of the next day, making a daily planned output curve and an energy storage charge-discharge marginal curve of the energy storage power station of the next day and planning an energy state change curve of the energy storage power station; correcting a day-ahead planned output curve of the energy storage power station in the next day to obtain an output instruction of the energy storage power station in the kth period, an energy storage charging marginal curve, an energy storage discharging marginal curve and an energy state change curve of the corrected energy storage power station; correcting an energy storage charge-discharge marginal curve and an output command of a kth period of the energy storage power station; and calculating an actual output reference value of the energy storage power station, and carrying out load peak-to-valley adjustment on the power system to complete peak regulation control of the energy storage power station. The invention calculates the actual output reference value of the energy storage power station based on ultra-short-term compound prediction, and controls peak regulation of the energy storage power station, and does not consider the high-rate discharge characteristic of the lithium ion battery.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a method, a system and a storage medium for controlling the multiplying power of an active support type lithium battery energy storage power station, so as to exert the short-time high-multiplying power overload capacity of a lithium ion battery, improve the upper limit of the charge and discharge power of the energy storage power station, and improve the adjustment capacity of the active support type energy storage power station.
In a first aspect, a method for controlling a multiplying power of a lithium battery energy storage power station is provided, and the method is applied to a case of setting redundancy configuration of an energy storage converter based on a multiplying power of a short-time high overload characteristic of an energy storage unit of a lithium ion battery, and comprises the following steps:
acquiring required input and output power, required duration, rated power of a lithium ion battery energy storage power station, rated power of a lithium ion battery energy storage unit, expected duration meeting the required input and output power and multiplying power of the lithium ion battery energy storage unit;
based on the acquired data, the lithium ion battery energy storage power station is controlled to switch and operate in three modes of a high-rate overload mode, a conventional overload mode and an intelligent operation mode.
The redundant configuration of the energy storage converter is improved by the multiplying power setting capability based on short-time overload of the lithium ion battery energy storage unit, and the power output capability of the lithium ion battery energy storage power station is improved under the condition of slightly increasing the cost of the energy storage power station; meanwhile, the lithium ion battery energy storage power station is controlled to switch operation in three modes of a high-rate overload mode, a conventional overload mode and an intelligent operation mode based on the acquired required input and output power, required duration time, expected duration time and the like, so that the operation efficiency of the energy storage converter and the box transformer is improved, and the efficiency of the lithium ion battery energy storage power station is further improved; the energy storage power station adjusting capability is better utilized, so that the reliable and stable operation of the power grid is ensured.
Further, the multiplying power overload capacity of the lithium ion battery energy storage unit is 2-100 times. The redundant configuration of the energy storage converter is arranged in a manner of adapting to the multiplying power of the lithium ion battery energy storage unit, the redundant configuration is 2-100 times, and the multiplying power charging and discharging capacity of the lithium ion battery energy storage power station is improved under the condition of slightly increasing the cost of the energy storage power station.
Further, the expected duration is obtained by the following method:
the method comprises the steps of obtaining required input and output power, a charging and discharging duration schedule of an initial lithium ion battery energy storage unit under different multiplying powers, and SOH of each lithium ion battery energy storage unit currently;
the expected duration at the required input-output power is calculated based on the acquired data.
The charging and discharging duration time table of the initial lithium ion battery energy storage unit under different multiplying powers records the charging and discharging duration time of the lithium ion battery energy storage unit under different multiplying powers when leaving a factory, and the actual expected sustainable time meeting the required input and output power can be calculated by acquiring the SOH of each current lithium ion battery energy storage unit and the required input and output power.
Further, P is used for indicating required input and output power, T is used for indicating required duration, P1 is used for indicating rated power of the lithium ion battery energy storage power station, C is used for indicating multiplying power of the lithium ion battery energy storage unit, and T is used for indicating expected duration;
when a multiplied by P1 is more than P and less than or equal to C multiplied by P1, controlling the lithium ion battery energy storage power station to operate in a short-time high-rate overload mode, carrying out second-level support according to requirements, and carrying out average distribution on overload capacity of the lithium ion battery energy storage unit under the condition of meeting the requirement of input and output power; wherein a is a preset value, and a is more than 1 and less than 2;
when T is more than or equal to T, the lithium ion battery energy storage power station outputs according to the required duration time T and the required input and output power P, and the lithium ion battery energy storage power station can meet the requirements;
when T is less than T, the lithium ion battery energy storage power station enters a protection state after the overload time reaches the expected sustainable time T, enters a conventional overload mode, and gives an alarm to an energy storage power station management system in advance.
Further, when P1 is more than P and less than or equal to a multiplied by P1, the lithium ion battery energy storage power station operates in a conventional overload mode, performs minute-level support according to requirements, and performs balance distribution on overload capacity of the lithium ion battery energy storage unit under the condition of meeting the requirements of input and output power;
when T is more than or equal to T, the lithium ion battery energy storage power station outputs according to the required duration time T and the required input and output power P, and the lithium ion battery energy storage power station can meet the requirements;
when T is less than T, the lithium ion battery energy storage power station enters a protection state after the overload time reaches the expected sustainable time T, enters an intelligent operation mode, and gives an alarm to an energy storage power station management system in advance.
Further, when P is more than 0 and less than or equal to P1, the lithium ion battery energy storage power station operates in an intelligent operation mode; calculating P/P2, wherein the result is an integer n, and P2 represents the rated power of the energy storage unit of the lithium ion battery; and selecting n lithium ion battery energy storage units for power output, and outputting the lithium ion battery energy storage power station according to the required duration time T and the required input and output power P.
Further, under the intelligent operation mode, SOH of each lithium ion battery energy storage unit is obtained in real time, and from the balance angle of each lithium ion battery energy storage unit, the operation state of each lithium ion battery energy storage unit is intelligently selected and switched on the premise that the input and output power is required. The method meets the requirement of input and output power, improves the operation efficiency of the energy storage converter and the box transformer, and further improves the efficiency of the energy storage power station.
In a second aspect, a system for actively supporting a multiplying power control of a lithium battery energy storage power station is provided, where the system is applied to multiplying power based on short-time high overload characteristic of an energy storage unit of a lithium ion battery, and under the condition of setting redundant configuration of an energy storage converter, the system comprises:
the data acquisition module is used for acquiring required input and output power, required duration, rated power of the lithium ion battery energy storage power station, rated power of the lithium ion battery energy storage unit, expected duration meeting the required input and output power and multiplying power of the lithium ion battery energy storage unit;
and the control module is used for controlling the lithium ion battery energy storage power station to switch and operate in three modes of a high-rate overload mode, a conventional overload mode and an intelligent operation mode based on the acquired data.
In a third aspect, an electronic device is provided, comprising:
a memory storing a computer program;
and the processor is used for realizing the rate control method of the lithium battery energy storage power station when loading and executing the computer program stored in the memory.
In a fourth aspect, a computer readable storage medium is provided, storing a computer program which when executed by a processor implements a lithium battery energy storage power station rate control method as described above.
Advantageous effects
The invention provides a method, a system and a storage medium for controlling the multiplying power of an active support lithium battery energy storage power station, which have the following advantages:
1) According to the invention, by improving the redundant configuration of the energy storage converter, the multiplying power charging and discharging capacity of the lithium ion battery energy storage power station is increased under the condition of slightly increasing the cost of the energy storage power station;
2) According to the invention, the working mode is selected according to the required input and output power, the required duration and the expected duration, the functions of the energy storage converter, the box transformer and the lithium ion battery energy storage unit are fully exerted, the operation efficiency of the energy storage converter and the box transformer is improved, and the efficiency of the lithium ion battery energy storage power station is further improved.
3) According to the scheme, the multiplying power charging and discharging capability of the lithium ion battery energy storage power station is fully exerted, the configuration requirement on the energy storage power station is reduced, the unit kilowatt overall cost during active support is reduced, the flexibility adjusting capability of the energy storage power station is better utilized, and therefore the reliable and stable operation of a power grid is ensured.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flow chart of a method for controlling the multiplying power of an active support lithium battery energy storage power station according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.
The invention aims to exert short-time high-rate overload capacity of the lithium ion battery, improve the upper limit of charge and discharge power of an energy storage power station and improve the adjustment capacity of an active support energy storage power station. And the redundant configuration of the energy storage converter is increased, so that the high-rate overload capacity of the lithium ion battery energy storage power station is improved. The power input and output requirements of the power grid are actively supported by tracking information such as a power grid dispatching system, a regional power grid and the like in real time, acquiring a historical load curve, acquiring an optimal power output scheme according to the input and output power required by analysis and the duration required by the input and output power required, and carrying out input and output power adjustment and multiplying power output by combining the state of an energy storage unit of the lithium ion battery. And then, according to the actual condition of the lithium ion battery energy storage unit, determining the expected sustainable time of the lithium ion battery energy storage power station under different powers, providing a supporting effect under the non-rated working condition, and effectively meeting the dynamic nonfunctional capacity of the power station. The rated power and the capacity of the lithium ion battery energy storage power station are based on the direct-current lithium ion battery system, and the capacities of the PCS, the transformer and other matched equipment are based on the lithium ion battery system. The overload capacity of the lithium ion battery energy storage power station mainly refers to overload of a direct current system, and a power distribution system corresponding to the lithium ion battery energy storage power station is subjected to redundant configuration according to the overload requirement of the direct current system. The invention is further illustrated by the following examples.
Example 1
The embodiment provides a method for controlling the multiplying power of an active support lithium battery energy storage power station, which is applied to multiplying power based on short-time high overload characteristic of an energy storage unit of a lithium ion battery, and comprises the following control processes under the condition of setting redundant configuration of an energy storage converter:
s1: the method comprises the steps of obtaining required input and output power P, required duration T, rated power P1 of a lithium ion battery energy storage power station, rated power P2 of a lithium ion battery energy storage unit, expected duration T meeting the required input and output power and multiplying power C of the lithium ion battery energy storage unit.
The power input/output requirements of the active support power grid are obtained by analyzing the information of a power grid dispatching system, a regional power grid and the like in real time, and acquiring a historical load curve, namely, the power input/output requirements are mainly determined according to the difference between the historical load curve and the real-time actual power of the power grid. The rated power P1 of the lithium ion battery energy storage power station, the rated power P2 of the lithium ion battery energy storage unit and the multiplying power C of the lithium ion battery energy storage unit are set values in production, and the multiplying power of the lithium ion battery energy storage unit and the redundant configuration value range of the energy storage converter are 2-100 times. The redundant configuration of the energy storage converter is arranged in a manner of adapting to the multiplying power of the energy storage unit of the lithium ion battery, the redundant configuration (namely the output power capability) is set to be 2-100 times according to actual needs, and the multiplying power charging and discharging capability of the energy storage power station of the lithium ion battery is improved under the condition of slightly increasing the cost of the energy storage power station.
Wherein the expected duration is obtained by the following method: the method comprises the steps of obtaining required input and output power, a charging and discharging duration schedule of an initial lithium ion battery energy storage unit under different multiplying powers, and SOH of each lithium ion battery energy storage unit currently; the expected duration at the required input-output power is calculated.
The charging and discharging duration time table of the initial lithium ion battery energy storage unit under different multiplying powers records the charging and discharging duration time of the lithium ion battery energy storage unit under different multiplying powers when leaving a factory, and the actual expected sustainable time meeting the required input and output power can be calculated by acquiring the SOH of each current lithium ion battery energy storage unit and the required input and output power.
S2: based on the acquired data, the lithium ion battery energy storage power station is controlled to switch and operate in three modes of a high-rate overload mode, a conventional overload mode and an intelligent operation mode. The method specifically comprises the following steps:
s2.1: when a multiplied by P1 is more than P and less than or equal to C multiplied by P1, controlling the lithium ion battery energy storage power station to operate in a high-multiplying power overload mode, carrying out second-level support according to requirements, and carrying out average distribution on overload capacity of the lithium ion battery energy storage unit under the condition of meeting the requirements of input and output power; wherein a is a preset value, and a is more than 1 and less than 2, and when the method is implemented, the value of a can be set according to actual needs, and in the embodiment, a is 1.5;
when T is more than or equal to T, the lithium ion battery energy storage power station outputs according to the required duration time T and the required input and output power P, and the lithium ion battery energy storage power station can meet the requirements;
when T is less than T, the lithium ion battery energy storage power station enters a protection state after the overload time reaches the expected sustainable time T, enters a conventional overload mode, and gives an alarm to an energy storage power station management system in advance.
S2.2: when P1 is more than P and less than or equal to a multiplied by P1, the lithium ion battery energy storage power station operates in a conventional overload mode, performs minute-level support according to requirements, and performs balance distribution on overload capacity of the lithium ion battery energy storage unit under the condition of meeting the requirements of input and output power;
when T is more than or equal to T, the lithium ion battery energy storage power station outputs according to the required duration time T and the required input and output power P, and the lithium ion battery energy storage power station can meet the requirements;
when T is less than T, the lithium ion battery energy storage power station enters a protection state after the overload time reaches the expected sustainable time T, enters an intelligent operation mode, and gives an alarm to an energy storage power station management system in advance.
S2.3: when P is more than 0 and less than or equal to P1, the lithium ion battery energy storage power station operates in an intelligent operation mode; calculating P/P2, wherein the result is an integer n, and P2 represents the rated power of the energy storage unit of the lithium ion battery; and selecting n lithium ion battery energy storage units for power output, and outputting the lithium ion battery energy storage power station according to the required duration time T and the required input and output power P. In this embodiment, in the intelligent operation mode, SOH of each lithium ion battery energy storage unit is obtained in real time, and from the balance angle of each lithium ion battery energy storage unit, the operation state of each lithium ion battery energy storage unit is intelligently selected and switched on the premise of meeting the requirement of input and output power. The method meets the requirement of input and output power, improves the operation efficiency of the energy storage converter and the box transformer, and further improves the efficiency of the energy storage power station.
For further understanding of the aspects of the present embodiments, the present aspects are further described below in conjunction with several examples.
The lithium ion battery energy storage power station consists of 10 lithium ion battery energy storage units, and the rated power of the lithium ion battery energy storage power station is P1; the multiplying power of the lithium ion battery energy storage unit is 4 times, and the rated power of the lithium ion battery energy storage unit is 0.1P1; a takes on a value of 1.5. The three states of the lithium ion battery energy storage power station are as follows: when the input/output power P=4×P1 is required, the required duration is 5s, and the expected duration of the lithium ion battery energy storage power station is 10s; when the input/output power P=1.5X1 is required, the required duration is 20min, and the expected duration of the lithium ion battery energy storage power station is 15min; when the input/output power p=0.75xp1 is required.
When p=4×p1, the lithium ion battery energy storage power station adopts a high-rate overload mode, and under the condition of meeting the requirement of input and output power, the overload capacities of 10 lithium ion battery energy storage units are distributed in a balanced mode, and the state information of the lithium ion battery energy storage units is collected through a monitoring system, so that the safety is ensured. And as T is more than or equal to T, the lithium ion battery energy storage power station is operated for 5 seconds according to the required input and output power P, and then the scheduling and the power grid condition standby operation are tracked.
When P=1.5X1, the lithium ion battery energy storage power station adopts a conventional overload mode, and under the condition of meeting the requirement of input and output power, the overload capacity of 10 lithium ion battery energy storage units is distributed in a balanced manner as much as possible, and the monitoring system collects state information of the lithium ion battery energy storage units at any time, so that safety is ensured. And because T is less than T, after the lithium ion battery energy storage power station operates for 15 minutes according to the output of the required power P, the lithium ion battery energy storage power station enters a protection state, enters an intelligent operation mode and gives an alarm to an energy storage power station management system in advance.
When p=0.75×p1, P/P2 is calculated, and the result is taken as an integer of 8, and the intelligent operation mode is entered. The lithium ion battery energy storage power station intelligently selects and switches the running states of 8 unit energy storage modules according to the state of the existing lithium ion battery energy storage unit and from the state balance angle of each lithium ion battery energy storage unit, and outputs the required power P.
The energy storage converter redundancy configuration is set on the basis of the multiplying power of the lithium ion battery energy storage unit, so that the multiplying power charging and discharging capacity of the lithium ion battery energy storage power station is improved under the condition of slightly increasing the cost of the energy storage power station; meanwhile, the lithium ion battery energy storage power station is controlled to switch operation in three modes of a high-rate overload mode, a conventional overload mode and an intelligent operation mode based on the acquired required input and output power, required duration time, expected duration time and the like, so that the operation efficiency of the energy storage converter and the box transformer is improved, and the efficiency of the lithium ion battery energy storage power station is further improved; the peak regulation capacity of the energy storage power station is better utilized, so that the reliable and stable operation of the power grid is ensured.
Example 2
The embodiment provides an initiative support lithium battery energy storage power station multiplying power control system, is applied to the multiplying power based on the short-time high overload characteristic of lithium ion battery energy storage unit, sets up under the condition of energy storage converter redundancy configuration, includes:
the data acquisition module is used for acquiring required input and output power, required duration, rated power of the lithium ion battery energy storage power station, rated power of the lithium ion battery energy storage unit, expected duration meeting the required input and output power and multiplying power of the lithium ion battery energy storage unit;
and the control module is used for controlling the lithium ion battery energy storage power station to switch and operate in three modes of a high-rate overload mode, a conventional overload mode and an intelligent operation mode based on the acquired data.
Example 3
The present embodiment provides an electronic device, including:
a memory storing a computer program;
and the processor is used for realizing the rate control method of the lithium battery energy storage power station when loading and executing the computer program stored in the memory.
Example 4
The present embodiment provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements a lithium battery energy storage power station magnification control method as described above.
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-usable 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.
It is to be understood that the same or similar parts in the above embodiments may be referred to each other, and that in some embodiments, the same or similar parts in other embodiments may be referred to.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (7)
1. The method is characterized in that the control process is applied to the situation of setting the redundant configuration of the energy storage converter based on the short-time high overload characteristic of the lithium ion battery energy storage unit, and comprises the following steps:
acquiring required input and output power, required duration, rated power of a lithium ion battery energy storage power station, rated power of a lithium ion battery energy storage unit, expected duration meeting the required input and output power and multiplying power of the lithium ion battery energy storage unit;
based on the acquired data, controlling the lithium ion battery energy storage power station to switch operation in three modes of a high-rate overload mode, a conventional overload mode and an intelligent operation mode;
p is used for indicating required input and output power, T is used for indicating required duration, P1 is used for indicating rated power of the lithium ion battery energy storage power station, C is used for indicating multiplying power of the lithium ion battery energy storage unit, and T is used for indicating expected duration;
when a multiplied by P1 is more than P and less than or equal to C multiplied by P1, controlling the lithium ion battery energy storage power station to operate in a high-multiplying power overload mode, and carrying out average distribution on overload capacity of the lithium ion battery energy storage unit under the condition of meeting the requirement of input and output power; wherein a is a preset value, and a is more than 1 and less than 2;
when T is more than or equal to T, the lithium ion battery energy storage power station outputs according to the required duration time T and the required input and output power P;
when T is less than T, the lithium ion battery energy storage power station enters a conventional overload mode after the overload time reaches the expected sustainable time T, and alarms to an energy storage power station management system in advance;
when P1 is more than P and less than or equal to a multiplied by P1, the lithium ion battery energy storage power station operates in a conventional overload mode, and the overload capacity of the lithium ion battery energy storage unit is balanced and distributed under the condition of meeting the requirement of input and output power;
when T is more than or equal to T, the lithium ion battery energy storage power station outputs according to the required duration time T and the required input and output power P;
when T is less than T, the lithium ion battery energy storage power station enters an intelligent operation mode after the overload time reaches the expected sustainable time T, and alarms to an energy storage power station management system in advance;
when P is more than 0 and less than or equal to P1, the lithium ion battery energy storage power station operates in an intelligent operation mode; calculating P/P2, wherein the result is an integer n, and P2 represents the rated power of the energy storage unit of the lithium ion battery; and selecting n lithium ion battery energy storage units for power output, and outputting the lithium ion battery energy storage power station according to the required duration time T and the required input and output power P.
2. The method for controlling the multiplying power of the lithium battery energy storage power station according to claim 1, wherein the multiplying power of the lithium battery energy storage unit and the redundant configuration of the energy storage converter are in a range of 2-100 times.
3. The method of claim 1, wherein the expected duration is obtained by:
the method comprises the steps of obtaining required input and output power, charging and discharging duration time tables of an initial lithium ion battery energy storage unit module under different multiplying powers, and SOH of each lithium ion battery energy storage unit at present;
the expected duration at the required input-output power is calculated based on the acquired data.
4. The method for controlling the multiplying power of the lithium battery energy storage power station according to claim 1, wherein in the intelligent operation mode, the SOH of each lithium battery energy storage unit is obtained in real time, and from the balance angle of each lithium battery energy storage unit, the operation state of each lithium battery energy storage unit is intelligently selected and switched on the premise that the required input and output power is met.
5. The utility model provides a lithium battery energy storage power station multiplying power control system which characterized in that is applied to the multiplying power based on lithium ion battery energy storage unit short-time high overload characteristic, sets up under the condition of energy storage converter redundant configuration, includes:
the data acquisition module is used for acquiring required input and output power, required duration, rated power of the lithium ion battery energy storage power station, rated power of the lithium ion battery energy storage unit, expected duration meeting the required input and output power and multiplying power of the lithium ion battery energy storage unit;
the control module is used for controlling the lithium ion battery energy storage power station to switch and operate in three modes of a high-rate overload mode, a conventional overload mode and an intelligent operation mode based on the acquired data;
p is used for indicating required input and output power, T is used for indicating required duration, P1 is used for indicating rated power of the lithium ion battery energy storage power station, C is used for indicating multiplying power of the lithium ion battery energy storage unit, and T is used for indicating expected duration;
when a multiplied by P1 is more than P and less than or equal to C multiplied by P1, controlling the lithium ion battery energy storage power station to operate in a high-multiplying power overload mode, and carrying out average distribution on overload capacity of the lithium ion battery energy storage unit under the condition of meeting the requirement of input and output power; wherein a is a preset value, and a is more than 1 and less than 2;
when T is more than or equal to T, the lithium ion battery energy storage power station outputs according to the required duration time T and the required input and output power P;
when T is less than T, the lithium ion battery energy storage power station enters a conventional overload mode after the overload time reaches the expected sustainable time T, and alarms to an energy storage power station management system in advance;
when P1 is more than P and less than or equal to a multiplied by P1, the lithium ion battery energy storage power station operates in a conventional overload mode, and the overload capacity of the lithium ion battery energy storage unit is balanced and distributed under the condition of meeting the requirement of input and output power;
when T is more than or equal to T, the lithium ion battery energy storage power station outputs according to the required duration time T and the required input and output power P;
when T is less than T, the lithium ion battery energy storage power station enters an intelligent operation mode after the overload time reaches the expected sustainable time T, and alarms to an energy storage power station management system in advance;
when P is more than 0 and less than or equal to P1, the lithium ion battery energy storage power station operates in an intelligent operation mode; calculating P/P2, wherein the result is an integer n, and P2 represents the rated power of the energy storage unit of the lithium ion battery; and selecting n lithium ion battery energy storage units for power output, and outputting the lithium ion battery energy storage power station according to the required duration time T and the required input and output power P.
6. An electronic device, comprising:
a memory storing a computer program;
a processor for implementing the lithium battery energy storage power station multiplying power control method according to any one of claims 1 to 4 when loading and executing the computer program stored in the memory.
7. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the lithium battery energy storage power station magnification control method according to any one of claims 1 to 4.
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