CN113922430A - Charging/discharging control method of energy storage system, storage medium and energy storage system - Google Patents
Charging/discharging control method of energy storage system, storage medium and energy storage system 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
- 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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/387—Determining ampere-hour charge capacity or SoC
- G01R31/388—Determining ampere-hour charge capacity or SoC involving voltage measurements
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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Abstract
The invention discloses a charge/discharge control method of an energy storage system, a storage medium and the energy storage system, wherein the method comprises the following steps: the method comprises the steps of obtaining charging/discharging requirements and the current SOC and voltage difference of each energy storage module, sequencing the current SOC of each energy storage module to obtain the current SOC sequencing sequence of each energy storage module, obtaining the SOC correction difference of each energy storage module according to the voltage difference and working state of each energy storage module and the current SOC of each energy storage module, obtaining the comprehensive sequencing sequence of each energy storage module according to the current SOC sequencing sequence of each energy storage module and the SOC correction difference of each energy storage module, and controlling the charging/discharging power of each energy storage module according to the comprehensive sequencing sequence and the charging/discharging requirements. By the method, the consistency of the energy storage modules in the energy storage system is better, unnecessary operation and maintenance cost caused by replacing the energy storage modules too early and the condition of shutdown of the energy storage system caused by the energy storage modules with poor use states in the operation process can be prevented.
Description
Technical Field
The invention belongs to the technical field of electric power, and particularly relates to a charging/discharging control method of an energy storage system, a storage medium and the energy storage system.
Background
Along with the development of society, the demand of people's daily production and life to the electric energy constantly increases, and the power consumption concentration is also more and more obvious, and this just can cause the power supply not enough when power consumption peak such as daytime, evening, and then directly influence the stability and the security of electric wire netting for more and more places have to adopt extreme modes such as power-off limit electricity to ensure the steady operation of electric wire netting, influence people's production and life, also brought very big inconvenience and caused great economic loss for people's life.
The inventor finds that the existing energy storage system can play a role in improving the power supply quality and improving the stability of a power grid in a peak clipping and valley filling mode. Compared with other energy storage modes, a battery energy storage system represented by a lithium-ion battery and a vanadium liquid battery has the advantages of convenience, rapidness and high energy conversion rate, and therefore more and more attention is paid to the battery energy storage system. However, the energy storage system may be charged and discharged according to actual requirements, and thus the working time of each energy storage module in the energy storage system is different, so that the consistency of each energy storage module in the energy storage system is poor, and further the state of the energy storage system in the operation process may be poor, or the maintenance cost of the energy storage system may be increased due to frequent replacement of batteries.
Disclosure of Invention
The invention provides a charge/discharge control method of an energy storage system, a storage medium and the energy storage system, which are used for effectively relieving the problem of poor consistency of energy storage modules and avoiding the problem of increased maintenance cost of the energy storage system caused by frequent replacement of the energy storage modules.
In a first aspect, the present invention provides a charge/discharge control method for an energy storage system, the method comprising:
acquiring charging/discharging requirements and the current SOC and voltage difference of each energy storage module in a plurality of energy storage modules included in an energy storage system, and sequencing the current SOC of each energy storage module to obtain the current SOC sequencing sequence of each energy storage module;
obtaining an SOC correction difference value of each energy storage module according to the voltage difference and the working state of each energy storage module and the current SOC of each energy storage module;
obtaining a comprehensive sorting sequence of each energy storage module according to the current SOC sorting sequence of each energy storage module and the SOC correction difference value of each energy storage module;
and controlling the charging/discharging power of each energy storage module according to the comprehensive sequencing sequence and the charging/discharging requirements.
Optionally, in the charge/discharge control method for the energy storage system, when the obtained charge/discharge demand is a discharge demand, a working state corresponding to each energy storage module is a discharge state, and an SOC correction difference value of each energy storage module is obtained according to the voltage difference and the working state of each energy storage module and a current SOC of each energy storage module, where the method includes:
when the working state of the energy storage modules is a discharging state, for each energy storage module, calculating according to the discharging lower limit voltage of the energy storage module, the current lowest voltage of a battery in the energy storage module and the voltage difference of the energy storage module by adopting a first preset calculation formula to obtain the discharging SOC coefficient of each energy storage module, wherein the first preset calculation formula is (V)L-VLL)/VD，VLIs the current lowest voltage, V, of the battery in the energy storage moduleLLIs the lower limit voltage, V, of the discharge of the energy storage moduleDThe voltage difference of the energy storage module;
acquiring initial SOC (state of charge) in a discharge state corresponding to the discharge SOC coefficients of the energy storage modules respectively;
and taking the difference value between the current SOC of each energy storage module and the initial SOC in the discharging state as the SOC correction difference value of each energy storage module in the discharging state, and sequencing the SOC correction difference values of each energy storage module in the discharging state to obtain the SOC correction difference value sequencing sequence of each energy storage module in the discharging state.
Optionally, in the charge/discharge control method of the energy storage system, controlling the charge/discharge power of each energy storage module according to the comprehensive sorting order and the charge/discharge demand includes:
calculating according to the discharge required power in the discharge demand and the rated power of the energy storage module by adopting a second preset calculation formula to obtain the required quantity of the energy storage module, wherein the second preset calculation formula is N ═ Pload/Pe) +1, N is the required quantity of the energy storage module, Pload is the discharge required power, and Pe is the rated power of the energy storage module;
and when the required quantity N of the energy storage modules is smaller than the quantity M of the energy storage modules in the energy storage system, selecting the N energy storage modules according to the comprehensive sorting sequence from high to low so as to enable the selected N energy storage modules to output power, wherein the sum of the output power of the N energy storage modules is the discharge required power.
Optionally, in the charge/discharge control method for the energy storage system, the selecting N energy storage modules according to the comprehensive sorting order from high to low to enable the selected N energy storage modules to output power includes:
selecting N energy storage modules according to the comprehensive sorting sequence from high to low, and summing the current SOC of the selected N energy storage modules to obtain a total SOC;
calculating the calculated power corresponding to each energy storage module in the N energy storage modules by adopting a third preset calculation formula according to the selected current SOC, the total SOC and the discharge required power of each energy storage module in the N energy storage modules, so that each energy storage module in the N energy storage modules outputs the corresponding calculated power, wherein the third preset calculation formula is as follows: pk output＝(SOCk/SumSOC)*PloadDischarge of electricity，SumSOC＝∑SOCk，k＝1,2...N，SOCkIs the current SOC, P of the kth energy storage modulek outputFor the output power of the Kth energy storage module, PloadCharging of electricityPower is required for the discharge.
Optionally, in the charge/discharge control method for the energy storage system, when the obtained charge/discharge demand is a charge demand, the working state corresponding to each energy storage module is a charge state, and an SOC correction difference value of each energy storage module is obtained according to the voltage difference and the working state of each energy storage module and the current SOC of each energy storage module, where the method includes:
when the working state of the energy storage modules is a charging state, for each energy storage module, calculating according to the charging upper limit voltage of the energy storage module, the current highest voltage of the battery in the energy storage module and the voltage difference of the energy storage module by adopting a fourth preset calculation formula to obtain the charging SOC coefficient of each energy storage module, wherein the fourth preset calculation formula is (V)HL-VH)/VD，VHLFor charging the energy storage module to an upper limit voltage, VHIs the current highest voltage, V, of the battery in the energy storage moduleDThe voltage difference of the energy storage module;
acquiring initial SOC (state of charge) in a charging state corresponding to the SOC coefficients of the energy storage modules;
and taking the obtained difference value between the initial SOC and the current SOC of each energy storage module in the charging state as the SOC correction difference value of each energy storage module in the charging state.
Optionally, in the charge/discharge control method of the energy storage system, controlling the charge/discharge power of each energy storage module according to the comprehensive sorting order and the charge/discharge demand includes:
selecting the first J energy storage modules according to the sequence from low to high of the comprehensive sequencing sequence, and calculating the residual electric quantity of each energy storage module in the selected J energy storage modules;
calculating according to a fifth preset calculation formula according to the charging demand power in the charging demand, the selected maximum storage capacity and the selected residual electric quantity of each energy storage module in the J energy storage modules to obtain the charging calculation power of each energy storage module in the J energy storage modules, so that each energy storage module in the J energy storage modules is charged according to the charging calculation power, wherein the charging calculation power is used for charging each energy storage module in the J energy storage modules, and the charging calculation power is used for charging each energy storage module in the J energy storage modulesThe fifth preset calculation formula is: pk input＝((Qk electric quantity-Qk remains)/SumQ)*PloadCharging of electricity,SumQ＝∑(Qk electric quantity-Qk remains)，k＝1,2...J，Pk inputCalculating the power, Q, for charging the Kth energy storage modulek electric quantityIs the maximum charge capacity, Q, of the kth energy storage modulek remainsFor the residual capacity of the Kth energy storage module, PloadCharging of electricityPower is required for charging.
Optionally, in the charge/discharge control method of the energy storage system, obtaining a comprehensive sorting order of the energy storage modules according to the current SOC sorting order of the energy storage modules and the SOC correction difference of the energy storage modules includes:
sorting according to the SOC correction difference values of the energy storage modules to obtain a corrected SOC sorting sequence of the energy storage modules;
and carrying out weight calculation according to the current SOC sorting sequence and the corrected SOC sorting sequence of each energy storage module to obtain a comprehensive sorting sequence of each energy storage module.
Optionally, in the charge/discharge control method of the energy storage system, the method further includes:
obtaining the historical charging/discharging efficiency of each energy storage module, and sequencing according to the historical charging/discharging efficiency of each energy storage module to obtain a charging efficiency sequencing sequence of each energy storage module;
predicting according to the corrected SOC of each energy storage module and the current SOC of each energy storage module to obtain the predicted SOC of each energy storage module, and sequencing the predicted SOC of each energy storage module to obtain the predicted SOC sequencing sequence of each energy storage module;
obtaining a comprehensive sorting sequence of each energy storage module according to the current SOC sorting sequence of each energy storage module and the SOC correction difference value of each energy storage module, wherein the comprehensive sorting sequence comprises the following steps:
sorting according to the SOC correction difference values of the energy storage modules to obtain a corrected SOC sorting sequence of the energy storage modules;
and carrying out weight calculation according to the current SOC sequencing order, the corrected SOC sequencing order, the charging efficiency sequencing order and the predicted SOC sequencing order of each energy storage module to obtain a comprehensive sequencing order of each energy storage module.
In a second aspect, the invention also provides a storage medium storing a computer program which, when executed by one or more processors, performs the method as described above.
In a third aspect, the present invention provides an energy storage system, including a plurality of energy storage modules connected in parallel and a controller, where the controller is connected to each of the energy storage modules, and the controller is configured to execute the method described above.
The invention provides a charge/discharge control method of an energy storage system, a storage medium and the energy storage system, wherein the method comprises the following steps: obtaining charging/discharging requirements and a current SOC and a voltage difference of each energy storage module in a plurality of energy storage modules included in the energy storage system, sequencing the current SOC of each energy storage module to obtain a current SOC sequencing sequence of each energy storage module, obtaining an SOC correction difference value of each energy storage module according to the voltage difference and working state of each energy storage module and the current SOC of each energy storage module, sequencing according to the SOC correction difference value of each energy storage module to obtain an SOC correction difference value sequencing sequence of each energy storage module, obtaining a comprehensive sequencing sequence of each energy storage module according to the current SOC sequencing sequence and the SOC correction difference value sequencing sequence of each energy storage module, controlling charging/discharging power of each energy storage module according to the comprehensive sequencing sequence and the charging/discharging requirements, and reflecting a more real state of the current energy storage module by using the comprehensive sequencing sequence, and then utilize comprehensive sequencing order with each is filled/discharge demand control during the energy storage module fills/discharge power, can select the optimal energy storage module and fill/discharge, prevent that the energy storage module that the state is not good from overusing to make the uniformity of energy storage module better among the energy storage system, reach extension energy storage module life, unnecessary operation and maintenance cost that the energy storage module brought is changed to the earliest and the energy storage system that the state is not good in the operation process uses and leads to stops the operation, can not satisfy the load requirement condition.
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The accompanying drawings are included to provide a further understanding of the technology or prior art of the present application and are incorporated in and constitute a part of this specification. The drawings expressing the embodiments of the present application are used for explaining the technical solutions of the present application, and should not be construed as limiting the technical solutions of the present application.
Fig. 1 is a schematic flowchart of a charge/discharge control method of an energy storage system according to an embodiment of the present disclosure.
Fig. 2 is a schematic flowchart of step S120 in fig. 1.
Fig. 3 is another schematic flow chart of step S120 in fig. 1.
Fig. 4 is another schematic flow chart of a charging/discharging control method of an energy storage system according to an embodiment of the present disclosure.
Fig. 5 is a schematic flowchart of step S140 in fig. 1.
Fig. 6 is another schematic flow chart of step S140 in fig. 1.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the accompanying drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the corresponding technical effects can be fully understood and implemented. The embodiments and the features of the embodiments can be combined without conflict, and the technical solutions formed are all within the scope of the present invention.
Additionally, the steps illustrated in the flow charts of the figures may be performed in a computer such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
First embodiment
Referring to fig. 1, the present embodiment provides a charge/discharge control method for an energy storage system, where the method is applied to a controller in the energy storage system, the energy storage system further includes a plurality of energy storage modules connected in parallel, and the controller is electrically connected to each of the energy storage modules respectively for controlling charge/discharge power of each of the energy storage modules.
When the controller controls the charging/discharging power of each energy storage module, step S110 to step S140 are executed.
Step S110: the charging/discharging requirements and the current SOC and the voltage difference of each energy storage module in a plurality of energy storage modules included in the energy storage system are obtained, and the current SOC of each energy storage module is sequenced to obtain the current SOC sequencing sequence of each energy storage module.
Step S120: and obtaining the SOC correction difference value of each energy storage module according to the voltage difference and the working state of each energy storage module and the current SOC of each energy storage module.
Step S130: and obtaining a comprehensive sorting sequence of the energy storage modules according to the current SOC sorting sequence of the energy storage modules and the SOC correction difference values of the energy storage modules.
Step S140: and controlling the charging/discharging power of each energy storage module according to the comprehensive sequencing sequence and the charging/discharging requirements.
By adopting the steps S110 to S140, the comprehensive sorting sequence of each energy storage module is obtained according to the sorting sequence of the current SOC of each energy storage module in the energy storage system and the correction difference of each energy storage module, wherein the comprehensive sorting sequence reflects the real state of each energy storage module more truly, so that when the comprehensive sorting sequence and the charging/discharging requirements are utilized to control each energy storage module to charge/discharge, the optimal energy storage module can be selected to charge and discharge, the energy storage module with poor state is prevented from being used excessively, the consistency of the energy storage modules in the energy storage system is better as much as possible, and the service life of the energy storage modules is prolonged. In addition, unnecessary operation and maintenance cost caused by premature replacement of the energy storage module can be prevented, and the condition that the load requirement cannot be met due to shutdown of the energy storage system caused by use of the energy storage module with a poor state in the operation process can be avoided.
In step S110, it should be noted that the charge/discharge requirement includes a charge requirement or a discharge requirement, where when the charge/discharge requirement includes a charge requirement, the manner of obtaining the charge requirement from the charge requirement including the charge required power may be to obtain a pre-stored charge power of the energy storage system; when the charging/discharging requirement includes a discharging requirement, the energy storage system is usually connected with a load, and a specific manner of acquiring the discharging requirement may be to acquire a required power of the load connected with the energy storage system, so as to use the required power of the load as the discharging required power of the discharging requirement.
The manner of obtaining the current SOC of each energy storage module may be: acquiring information such as total charging/discharging time, actual maximum capacity, nominal maximum capacity and energy storage module attenuation life characteristic curves acquired through a large number of experiments of each energy storage module, and calculating attenuation degree and possible service life of each energy storage module so as to obtain current SOC of each energy storage module; it can also be: exciting each energy storage module by using alternating currents with different frequencies, measuring alternating current resistance in the energy storage modules, and obtaining a current SOC value through the established calculation model; the method can also be as follows: the method is obtained by calculation by using a Kalman filtering method, is not particularly limited, and can be set according to actual requirements.
The voltage difference of each energy storage module may be obtained by obtaining a voltage of each battery cell in each energy storage module, and taking a difference between the voltage of the battery cell with the largest voltage value and the voltage of the battery cell with the smallest voltage value in each energy storage module as the voltage difference of the energy storage module. The voltages of each battery cell in the energy storage module can also be sequenced from large to small, and the voltages of the first two battery cells sequenced in the front are summed and then are subtracted from the voltages of the last two battery cells sequenced in the end, and the average value is obtained to obtain the voltage difference of the energy storage module. The process of obtaining the voltage difference of each energy storage module is set according to actual requirements, and is not specifically limited herein
The sorting of the current SOC of each energy storage module may be sorting the current SO C of each energy storage module in an order from large to small, or sorting the current SOC of each energy storage module in an order from small to large. Optionally, in this embodiment, the sorting the current SOC of each energy storage module includes: and sequencing the current SOC of each energy storage module from large to small to obtain the current sequencing sequence of each energy storage module.
In step S120, it should be noted that, when the obtained charging/discharging demand is a charging demand, each energy storage module of the energy storage system should operate in a charging state, and correspondingly, when the obtained charging/discharging demand is a discharging demand, each energy storage module of the energy storage system should operate in a discharging state. Because energy storage module is when just beginning work (when each battery monomer is the battery monomer of first use in the energy storage module), energy storage module corresponds a standard SOC respectively under different operating condition and different voltages, and along with battery live time increases in the energy storage module, its performance changes, and then can influence the current SOC value that obtains of detection.
In order to obtain the correction difference of the energy storage module in different working states according to the working state of the energy storage module, in this embodiment, please refer to fig. 2, when the obtained charging/discharging demand is a discharging demand, the step S120 includes:
step S122 a: and when the working state of the energy storage modules is a discharging state, aiming at each energy storage module, calculating by adopting a first preset calculation formula according to the discharging lower limit voltage of the energy storage module, the current lowest voltage of a battery in the energy storage module and the voltage difference of the energy storage module so as to obtain the discharging SOC coefficient of each energy storage module.
Wherein the first preset calculation formula is (V)L-VLL)/VD，VLIs the current lowest voltage, V, of the battery in the energy storage moduleLLIs the lower limit voltage, V, of the discharge of the energy storage moduleDIs the voltage difference of the energy storage module.
The current lowest voltage of the battery in the energy storage module is the voltage of the lowest battery in the voltages of the plurality of batteries in the energy storage module under the current state.
Step S124 a: and acquiring initial SOC (state of charge) in a discharge state corresponding to the discharge SOC coefficients of the energy storage modules respectively.
In step S124a, the initial SOC in the discharging state corresponding to the discharging SOC coefficient of each energy storage module may be obtained from a preset correspondence table, where the preset correspondence table includes a plurality of discharging SOC coefficients and the initial SOC in the discharging state corresponding to each discharging SOC coefficient.
Step S126 a: and taking the difference value between the current SOC of each energy storage module and the initial SOC in the discharging state as the SOC correction difference value of each energy storage module in the discharging state.
Through the steps of the method, the SOC correction difference value of the energy storage modules in the discharging state is accurately obtained, and then the comprehensive sequencing sequence of the energy storage modules in the discharging state is conveniently obtained according to the SOC correction difference value of each energy storage module in the discharging state and the current SOC of each energy storage module.
Referring to fig. 3, when the acquired charging/discharging demand is a charging demand, the step S120 includes:
step S122 b: and when the working state of the energy storage modules is a charging state, aiming at each energy storage module, calculating by adopting a fourth preset calculation formula according to the charging upper limit voltage of the energy storage module, the current highest voltage of the battery in the energy storage module and the voltage difference of the energy storage module so as to obtain the charging SOC coefficient of each energy storage module.
Wherein the fourth preset calculation formula is (V)HL-VH)/VD，VHLFor charging the energy storage module to an upper limit voltage, VHIs the current highest voltage, V, of the battery in the energy storage moduleDIs the voltage difference of the energy storage module.
The current highest voltage of the batteries in the energy storage module is the voltage of the battery with the highest voltage value in the voltages of the batteries in the energy storage module.
Step S124 b: and acquiring initial SOC (state of charge) in a charging state corresponding to the SOC coefficients of the energy storage modules.
In step S124b, the initial SOC in the charging state corresponding to the SOC coefficient of each energy storage module may be obtained from a preset correspondence table, where the preset correspondence table includes a plurality of SOC coefficients and the initial SOC in the charging state corresponding to each SOC coefficient.
Step S126 b: and taking the obtained difference value between the initial SOC and the current SOC of each energy storage module in the charging state as the SOC correction difference value of each energy storage module in the charging state.
Through the steps of the method, the SOC correction difference value of the energy storage modules in the charging state is accurately obtained, and then the comprehensive sequencing sequence of the energy storage modules in the charging state is conveniently obtained according to the SOC correction difference value of the energy storage modules in the charging state and the current SOC of the energy storage modules.
The step S130 may be: and adjusting each current SOC in the current SOC sequencing sequence according to the SOC correction difference value (SOC correction difference value in a charging state or SOC correction difference value in a discharging state) of each energy storage module, and sequencing the adjusted SOCs to obtain a comprehensive sequencing sequence. For example, the SOC correction difference of each energy storage module is multiplied by a set coefficient and then is directly superimposed on the current SOC of the energy storage module to obtain the corrected SOC of each energy storage module, and the corrected SOCs of the energy storage modules are sorted to obtain a comprehensive sorting order. In the step S130, the SOC correction difference values of the energy storage modules may be sorted to obtain a corrected SOC sorting order, and a weight calculation may be performed according to the corrected SOC sorting order and the current SOC sorting order to obtain a comprehensive sorting order of the energy storage modules.
Optionally, in this embodiment, the step S130 includes:
and sorting according to the SOC correction difference values of the energy storage modules to obtain a corrected SOC sorting sequence of the energy storage modules, and performing weight calculation according to the current SOC sorting sequence and the corrected SOC sorting sequence of the energy storage modules to obtain a comprehensive sorting sequence of the energy storage modules.
Through the arrangement, the corresponding current SOC is calibrated by utilizing the pressure difference assistance of the energy storage modules, so that a more real sequencing sequence of the energy storage modules is obtained.
It should be noted that, during weight calculation, different weights need to be assigned to the current SOC sorting order and the corrected SOC sorting order, different weights need to be assigned to energy storage modules corresponding to different sorting sequence numbers in the current SOC sorting order, different weights need to be assigned to energy storage modules corresponding to different sorting sequence numbers in the corrected SOC sorting order, so that weight calculation is performed on each energy storage module by using a weight calculation formula to obtain a weight calculation result of each energy storage module, and sorting is performed according to the weight calculation result of each energy storage module to obtain a comprehensive sorting order of each energy storage module.
The sorting according to the weight calculation results of the energy storage modules may specifically be sorting according to a descending order of the weight calculation results of the energy storage modules to obtain a comprehensive sorting order of the energy storage modules.
Referring to fig. 4, in order to further make the comprehensive sorting order more reliable, in this embodiment, the method further includes step S150 and step S160.
Step S150: and obtaining the historical charging/discharging efficiency of each energy storage module, and sequencing according to the historical charging/discharging efficiency of each energy storage module to obtain a charging efficiency sequencing sequence of each energy storage module.
Step S160: and predicting according to the corrected SOC of each energy storage module and the current SOC of each energy storage module to obtain the predicted SOC of each energy storage module, and sequencing the predicted SOC of each energy storage module to obtain the predicted SOC sequencing sequence of each energy storage module.
Step S130 may further obtain a comprehensive ranking order according to the charging efficiency ranking order obtained in step S150, the predicted SOC ranking order obtained in step S160, the current SOC ranking order, and the corrected SOC ranking order; that is, the step S130 further includes a step S132 and a step S134.
Step S132: and sequencing according to the SOC correction difference value of each energy storage module to obtain a corrected SOC sequencing sequence of each energy storage module.
Step S134: and carrying out weight calculation according to the current SOC sequencing order, the corrected SOC sequencing order, the charging efficiency sequencing order and the predicted SOC sequencing order of each energy storage module to obtain a comprehensive sequencing order of each energy storage module.
Referring to table 1, taking three energy storage modules included in the energy storage system, which are a module a, a module B, and a module C as an example, and a current SOC sorting order, a corrected SOC sorting order, a charging efficiency sorting order, and a predicted SOC sorting order of each energy storage module, a total sorting score and a new sorting obtained by performing weight calculation on the four sorting orders are shown in table 1:
through the arrangement, when only 1 energy storage module needs to be adopted for power supply, the B module is selected for power supply, so that the selected energy storage module can be effectively ensured to be more reasonable, the purpose of preventing the energy storage module in a poor state from being excessively used is achieved, and the consistency of the energy storage module in the energy storage system is better.
In step S140, when the charging/discharging requirement is a charging requirement, in step S140, the required number of the energy storage modules may be determined according to the discharging required power in the discharging requirement and the power of the energy storage modules, and when the required number of the energy storage modules is greater than the number of the energy storage modules, each energy storage module in the energy storage system is controlled to output power; and when the required number of the energy storage modules is smaller than the number of the energy storage modules, selecting the energy storage modules with the required number from the plurality of energy storage modules according to the comprehensive sorting sequence so as to control the output power of the selected energy storage modules.
Referring to fig. 5, in detail, in the present embodiment, the step S140 includes:
step S142 a: and calculating according to the discharge required power in the discharge demand and the rated power of the energy storage module by adopting a second preset calculation formula to obtain the demand of the energy storage module.
The second preset calculation formula is (Pload/Pe) +1, N is the demand of the energy storage module, Pload is the discharge power demand, and Pe is the rated power of the energy storage module.
Step S144 a: and when the required quantity N of the energy storage modules is smaller than the quantity M of the energy storage modules in the energy storage system, selecting the N energy storage modules according to the comprehensive sorting sequence from high to low so as to enable the selected N energy storage modules to output power, wherein the sum of the output power of the N energy storage modules is the discharge required power.
It should be noted that the comprehensive sorting sequence is the sorting sequence of the real states of the energy storage modules, and the sorting sequence is more forward, the performance of the corresponding energy storage modules is better, and then when the N energy storage modules are selected from the high to low sequence according to the comprehensive sorting sequence for supplying power, the energy storage modules in a bad state are prevented from being used excessively, so that the consistency of the energy storage modules in the energy storage system can be further improved, the service life of the energy storage modules can be prolonged, the energy storage modules in a bad state are prevented from being used excessively, the energy storage modules are frequently replaced, unnecessary operation and maintenance cost is brought, and the situation that the energy storage system is stopped due to the fact that the load requirement is not met when the energy storage modules in a bad state are used for supplying power is avoided.
In order to further improve the consistency of each energy storage module in the energy storage system, in this embodiment, the step S144a includes:
step S1441 a: and selecting N energy storage modules according to the comprehensive sorting sequence from high to low, and summing the current SOC of the selected N energy storage modules to obtain the total SOC.
Step S1442 a: and calculating the calculated power corresponding to each energy storage module in the N energy storage modules by adopting a third preset calculation formula according to the selected current SOC, the total SOC and the discharge required power of each energy storage module in the N energy storage modules, so that each energy storage module in the N energy storage modules outputs the corresponding calculated power.
Wherein the third preset calculation formula is:Pk output＝(SOCk/SumS OC)*PlDischarge of electricity，SumSOC＝∑SOCk，k＝1,2...N，SOCkIs the current SOC, P of the kth energy storage modulek outputFor the output power of the Kth energy storage module, PloadCharging of electricityPower is required for the discharge.
It should be noted that, in the process of executing step S1442, when the power of the energy storage module in the selected N energy storage modules runs out, step S110 may be executed again.
Through the arrangement, the calculated power which should be output by each selected energy storage module is calculated for each selected energy storage module according to the comprehensive sequencing order, the current SOC and the discharging required power of each energy storage module, and the corresponding power is output according to the calculated power, so that more electric energy is released by the energy storage modules with higher performance, the consistency of the energy storage modules in the energy storage system is further higher, and the service life of each energy storage module in the energy storage system is further prolonged.
Referring to fig. 6, when the charge/discharge demand is a charge demand, the step S140 includes:
step S142 b: and selecting the first J energy storage modules according to the sequence of the comprehensive sequencing sequence from low to high, and calculating the residual electric quantity of each energy storage module in the selected J energy storage modules.
The number of the selected energy storage modules should be less than or equal to the number of the energy storage modules in the energy storage system. The specific number of the selected energy storage modules is not specifically limited, and the energy storage modules are set according to actual requirements.
Step S144 b: and calculating according to a fifth preset calculation formula, the charging required power in the charging requirement, the selected maximum storage capacity and the selected residual electric quantity of each energy storage module in the J energy storage modules to obtain the charging calculation power of each energy storage module in the J energy storage modules, so that each energy storage module in the J energy storage modules is charged according to the charging calculation power.
Wherein the fifth preset calculation formula is: pk input＝((Qk electric quantity-Qk remains)/SumQ)*PloadCharging of electricity,SumQ＝∑(Qk electric quantity-Qk remains)，k＝1,2...J，Pk inputCalculating the power, Q, for charging the Kth energy storage modulek electric quantityIs the maximum charge capacity, Q, of the kth energy storage modulek remainsFor the residual capacity of the Kth energy storage module, PloadCharging of electricityPower is required for charging.
It should be noted that, in the process of charging the selected J energy storage modules, when the remaining power of the selected J energy storage modules reaches the maximum power storage amount, the step S110 may be executed again, or the step S110 may be executed again when the remaining power of the selected J energy storage modules reaches the maximum power storage amount, where no specific limitation is made, and the setting may be performed according to actual requirements.
Through the arrangement, the energy storage modules with more power consumption can be quickly charged, so that the energy storage modules with excessive power consumption in the energy storage system can quickly recover the electric quantity, the charging consistency of each energy storage module in the energy storage system is further improved, the energy storage modules are comprehensively sequenced under the condition of full points in the using and using process of the energy storage system after charging is completed, the more real state of the current energy storage module is reflected, the optimal energy storage module can be selected for charging and discharging, the energy storage modules with poor states are prevented from being excessively used, the consistency of the energy storage modules in the energy storage system is better as much as possible, the service life of the energy storage modules is prolonged, unnecessary operation and maintenance cost caused by the energy storage modules being replaced too early and the energy storage system caused by the energy storage modules with poor states in the operating process is prevented from being stopped, the load demand situation cannot be met.
Example two
The present embodiment also provides a storage medium, such as a flash memory, a hard disk, a multimedia card, a card-type memory (e.g., SD or DX memory, etc.), a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a Read Only Memory (ROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a Programmable Read Only Memory (PROM), a magnetic memory, a magnetic disk, an optical disk, a server, an App application store, etc., on which a computer program is stored, which when executed by a processor can implement the charge and discharge control method of the energy storage system in the first embodiment.
For the specific embodiment of the process of the above method steps, reference may be made to this embodiment, which is not repeated herein.
EXAMPLE III
The embodiment of the application provides an energy storage system, which may include a controller and a plurality of energy storage modules, and the energy storage system may further include a memory, where the controller is connected to each of the energy storage modules and the memory, respectively, and the memory stores a computer program, and the computer program is executed by the controller to implement the charging/discharging control method of the energy storage system according to the first embodiment.
In this embodiment, in order to facilitate control of charging/discharging power of each energy storage module, the energy storage modules are connected to the controller through a bidirectional converter, and the structures of the energy storage modules are identical.
The controller is configured to perform all or part of the steps in the method for controlling charging/discharging of an energy storage system in the first embodiment. The memory is used to store various types of data, which may include, for example, instructions for any application or method in the electronic device, as well as application-related data.
The controller may be implemented by an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a microcontroller, a microprocessor, or other electronic components, and is configured to perform all or part of the steps of the method in the first embodiment.
The Memory may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk or optical disk.
In summary, the present invention provides a charge/discharge control method for an energy storage system, a storage medium and an energy storage system, the method includes: the method comprises the steps of obtaining charging/discharging requirements, the current SOC and the voltage difference of each energy storage module, sequencing the current SOC of each energy storage module to obtain the current SOC sequencing sequence of each energy storage module, obtaining the SOC correction difference of each energy storage module according to the voltage difference and the working state of each energy storage module and the current SOC of each energy storage module, obtaining the comprehensive sequencing sequence of each energy storage module according to the current SOC sequencing sequence of each energy storage module and the SOC correction difference of each energy storage module, and controlling the charging/discharging power of each energy storage module according to the comprehensive sequencing sequence and the charging/discharging requirements. The energy storage module that can effectively prevent the state not good overuse, the uniformity that lets energy storage module among the energy storage system as far as possible is better, extension energy storage module life prevents to change the unnecessary fortune dimension expense that energy storage module brought too early, and uses and the energy storage system that leads to of the not good energy storage module of state in the operation process and stops the fortune, can not satisfy the load requirement condition.
Although the embodiments of the present invention have been described above, the above descriptions are only for the convenience of understanding the present invention, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A method of controlling charge/discharge of an energy storage system, the method comprising:
acquiring charging/discharging requirements and the current SOC and voltage difference of each energy storage module in a plurality of energy storage modules included in an energy storage system, and sequencing the current SOC of each energy storage module to obtain the current SOC sequencing sequence of each energy storage module;
obtaining an SOC correction difference value of each energy storage module according to the voltage difference and the working state of each energy storage module and the current SOC of each energy storage module;
obtaining a comprehensive sorting sequence of each energy storage module according to the current SOC sorting sequence of each energy storage module and the SOC correction difference value of each energy storage module;
and controlling the charging/discharging power of each energy storage module according to the comprehensive sequencing sequence and the charging/discharging requirements.
2. The charge/discharge control method of the energy storage system according to claim 1, wherein when the obtained charge/discharge demand is a discharge demand, the operating state corresponding to each of the energy storage modules is a discharge state, and the SOC correction difference value of each of the energy storage modules is obtained according to the voltage difference and the operating state of each of the energy storage modules and the current SOC of each of the energy storage modules, and includes:
when the working state of the energy storage modules is a discharging state, for each energy storage module, calculating according to the discharging lower limit voltage of the energy storage module, the current lowest voltage of a battery in the energy storage module and the voltage difference of the energy storage module by adopting a first preset calculation formula to obtain the discharging SOC coefficient of each energy storage module, wherein the first preset calculation formula is (V)L-VLL)/VD，VLIs the current lowest voltage, V, of the battery in the energy storage moduleLLIs the lower limit voltage, V, of the discharge of the energy storage moduleDThe voltage difference of the energy storage module;
acquiring initial SOC (state of charge) in a discharge state corresponding to the discharge SOC coefficients of the energy storage modules respectively;
and taking the difference value between the current SOC of each energy storage module and the initial SOC in the discharging state as the SOC correction difference value of each energy storage module in the discharging state.
3. The charge/discharge control method of the energy storage system according to claim 2, wherein controlling the charge/discharge power of each energy storage module according to the comprehensive ranking order and the charge/discharge demand comprises:
calculating according to the discharge required power in the discharge demand and the rated power of the energy storage module by adopting a second preset calculation formula to obtain the required quantity of the energy storage module, wherein the second preset calculation formula is N ═ Pload/Pe) +1, N is the required quantity of the energy storage module, Pload is the discharge required power, and Pe is the rated power of the energy storage module;
and when the required quantity N of the energy storage modules is smaller than the quantity M of the energy storage modules in the energy storage system, selecting the N energy storage modules according to the comprehensive sorting sequence from high to low so as to enable the selected N energy storage modules to output power, wherein the sum of the output power of the N energy storage modules is the discharge required power.
4. The charge/discharge control method of the energy storage system according to claim 3, wherein the step of selecting the N energy storage modules according to the comprehensive sorting order from high to low so that the selected N energy storage modules output power comprises:
selecting N energy storage modules according to the comprehensive sorting sequence from high to low, and summing the current SOC of the selected N energy storage modules to obtain a total SOC;
calculating the calculated power corresponding to each energy storage module in the N energy storage modules by adopting a third preset calculation formula according to the selected current SOC, the total SOC and the discharge required power of each energy storage module in the N energy storage modules, so that each energy storage module in the N energy storage modules outputs the corresponding calculated power, wherein the third preset calculation formula is as follows: pk output＝(SOCk/SumSOC)*PloadDischarge of electricity，SumSOC＝∑SOCk，k＝1,2...N，SOCkFor the kth energy storageCurrent SOC, P of the modulek outputFor the output power of the Kth energy storage module, PloadCharging of electricityPower is required for the discharge.
5. The charge/discharge control method of the energy storage system according to claim 1, wherein when the obtained charge/discharge demand is a charge demand, the working state corresponding to each of the energy storage modules is a charge state, and the SOC correction difference value of each of the energy storage modules is obtained according to the voltage difference and the working state of each of the energy storage modules and the current SOC of each of the energy storage modules, and includes:
when the working state of the energy storage modules is a charging state, for each energy storage module, calculating according to the charging upper limit voltage of the energy storage module, the current highest voltage of the battery in the energy storage module and the voltage difference of the energy storage module by adopting a fourth preset calculation formula to obtain the charging SOC coefficient of each energy storage module, wherein the fourth preset calculation formula is (V)HL-VH)/VD，VHLFor charging the energy storage module to an upper limit voltage, VHIs the current highest voltage, V, of the battery in the energy storage moduleDThe voltage difference of the energy storage module;
acquiring initial SOC (state of charge) in a charging state corresponding to the SOC coefficients of the energy storage modules;
and taking the obtained difference value between the initial SOC and the current SOC of each energy storage module in the charging state as the SOC correction difference value of each energy storage module in the charging state.
6. The charge/discharge control method of the energy storage system according to claim 5, wherein controlling the charge/discharge power of each energy storage module according to the comprehensive ranking order and the charge/discharge demand comprises:
selecting the first J energy storage modules according to the sequence from low to high of the comprehensive sequencing sequence, and calculating the residual electric quantity of each energy storage module in the selected J energy storage modules;
selecting the J energy storages according to the charging demand power in the charging demandCalculating the maximum storage capacity and the residual capacity of each energy storage module in the modules according to a fifth preset calculation formula to obtain the charging calculation power of each energy storage module in the selected J energy storage modules, so that each energy storage module in the J energy storage modules is charged according to the charging calculation power, wherein the fifth preset calculation formula is as follows: pk input＝((Qk electric quantity-Qk remains)/SumQ)*PloadCharging of electricity,SumQ＝∑(Qk electric quantity-Qk remains)，k＝1,2...J，Pk inputCalculating the power, Q, for charging the Kth energy storage modulek electric quantityIs the maximum charge capacity, Q, of the kth energy storage modulek remainsFor the residual capacity of the Kth energy storage module, PloadCharging of electricityPower is required for charging.
7. The charge/discharge control method of an energy storage system according to claim 1, wherein obtaining a comprehensive ranking order of the energy storage modules according to the current SOC ranking order of the energy storage modules and the SOC correction difference values of the energy storage modules comprises:
sorting according to the SOC correction difference values of the energy storage modules to obtain a corrected SOC sorting sequence of the energy storage modules;
and carrying out weight calculation according to the current SOC sorting sequence and the corrected SOC sorting sequence of each energy storage module to obtain a comprehensive sorting sequence of each energy storage module.
8. The charge/discharge control method of an energy storage system according to claim 1, characterized by further comprising:
obtaining the historical charging/discharging efficiency of each energy storage module, and sequencing according to the historical charging/discharging efficiency of each energy storage module to obtain a charging efficiency sequencing sequence of each energy storage module;
predicting according to the corrected SOC of each energy storage module and the current SOC of each energy storage module to obtain the predicted SOC of each energy storage module, and sequencing the predicted SOC of each energy storage module to obtain the predicted SOC sequencing sequence of each energy storage module;
obtaining a comprehensive sorting sequence of each energy storage module according to the current SOC sorting sequence of each energy storage module and the SOC correction difference value of each energy storage module, wherein the comprehensive sorting sequence comprises the following steps:
sorting according to the SOC correction difference values of the energy storage modules to obtain a corrected SOC sorting sequence of the energy storage modules;
and carrying out weight calculation according to the current SOC sequencing order, the corrected SOC sequencing order, the charging efficiency sequencing order and the predicted SOC sequencing order of each energy storage module to obtain a comprehensive sequencing order of each energy storage module.
9. A storage medium storing a computer program, characterized in that the computer program, when executed by one or more processors, implements the method according to any one of claims 1-7.
10. An energy storage system, characterized by comprising a plurality of energy storage modules connected in parallel and a controller, wherein the controller is connected with each energy storage module respectively, and the controller is used for executing the charging/discharging control method of the energy storage system according to any one of claims 1 to 8.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010233287A (en) * | 2009-03-26 | 2010-10-14 | Hitachi Industrial Equipment Systems Co Ltd | Charge and discharge control device, and method of controlling charge and discharge |
| CN102577010A (en) * | 2009-10-05 | 2012-07-11 | 日本碍子株式会社 | Controller, controller network and control method |
| KR20150062050A (en) * | 2013-11-28 | 2015-06-05 | 주식회사 포스코아이씨티 | Battery Conditioning System and Battery Energy Storage System Including That Battery Conditioning System |
| CN108092352A (en) * | 2017-11-27 | 2018-05-29 | 浙江大学 | A kind of modulator approach suitable for the state-of-charge equilibrium of multimode battery modules |
| KR101922478B1 (en) * | 2017-06-01 | 2018-11-27 | 한국전력공사 | Apparatus for diagnosing battery and method thereof |
-
2020
- 2020-07-08 CN CN202010652931.5A patent/CN113922430A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010233287A (en) * | 2009-03-26 | 2010-10-14 | Hitachi Industrial Equipment Systems Co Ltd | Charge and discharge control device, and method of controlling charge and discharge |
| CN102577010A (en) * | 2009-10-05 | 2012-07-11 | 日本碍子株式会社 | Controller, controller network and control method |
| KR20150062050A (en) * | 2013-11-28 | 2015-06-05 | 주식회사 포스코아이씨티 | Battery Conditioning System and Battery Energy Storage System Including That Battery Conditioning System |
| KR101922478B1 (en) * | 2017-06-01 | 2018-11-27 | 한국전력공사 | Apparatus for diagnosing battery and method thereof |
| CN108092352A (en) * | 2017-11-27 | 2018-05-29 | 浙江大学 | A kind of modulator approach suitable for the state-of-charge equilibrium of multimode battery modules |
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