Energy management system control method, device, terminal and medium for energy storage power station

Abstract

The present invention application provides a control method, device, terminal and medium for an energy management system of an energy storage power station, the method comprising: collecting the first total forward active power and the first total forward reactive power at the initial moment of the first target time period; collecting the second total forward active power and the second total forward reactive power at the current moment; collecting the real-time power factor; calculating the comprehensive power factor to set the required output reactive power value; sending a control instruction to the energy management system to distribute the required output reactive power value to each energy storage converter execution unit. The present application can reduce the total reactive power by setting the comprehensive reactive power allowed in the second target time period and the real-time allowed reactive power factor. The method can also improve the comprehensive power factor without cutting off the connection between the energy storage converter and the power grid, avoiding the reduction of equipment service life and power station available capacity caused by circuit breaker operation, and reducing the operation risk of the power station.

Description

Technical Field

[0001] The present invention relates to the field of energy management system control technology, and in particular to an energy management system control method, device, terminal equipment and computer-readable storage medium for an energy storage power station. Background Art

[0002] During the operation of the energy storage power station, the energy management system (EMS) is an important part of the energy storage system. It monitors and controls the power station equipment and the entire energy storage system to achieve better energy utilization efficiency, improve system performance and optimize the working state. Among them, the energy storage converter and its filter circuit, boost transformer, etc. of the energy storage power station on the source and grid side will generate a certain amount of reactive power. At the same time, in order to ensure the stability and safety of the battery, the energy storage power station needs to be equipped with an air conditioning system. The reactive power of the fan, compressor and other equipment of the air conditioning system is relatively large. The active power during the charging and discharging process of the energy storage power station is relatively large, and the reactive power generated by the fan, compressor and other equipment is relatively small compared to the energy storage power station. Therefore, under this working condition, the comprehensive power factor of the energy storage power station is relatively high. However, under static working conditions, the active power component is close to 0. At this time, the energy storage converter is in a locked state. The reactive power generated by the filter circuit, boost transformer and auxiliary power of the air conditioning system on the AC side will cause more useless energy loss. The comprehensive power factor of the energy storage power station is low, and the reactive power will be transmitted to the power grid.

[0003] From the above, the operation and maintenance party needs to reduce the total reactive power generated by the energy storage power station as much as possible, so as to improve the comprehensive power factor of the energy storage power station. At present, in order to improve the comprehensive power factor over a period of time, the operation and maintenance personnel of the energy storage power station will turn off the AC side circuit breaker of the energy storage converter (PCS) of each energy storage unit when the power station is stationary, so that the filter circuit and boost transformer of the PCS are disconnected from the power grid, reducing the reactive power generated by the PCS and its filter circuit and boost transformer, and reducing the positive reactive power of the energy storage power station. However, this method requires a large manpower cost, and the frequent operation of the circuit breaker will reduce the service life of the equipment. Summary of the invention

[0004] The present invention provides an energy management system control method, device, terminal equipment and computer-readable storage medium for an energy storage power station, which can avoid frequent operation of circuit breakers under static conditions of the energy storage power station and slow down the speed at which the service life of the equipment decreases.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides an energy management system control method for an energy storage power station, comprising:

[0006] Collect the first total forward active power and the first total forward reactive power at the initial moment of the first target time period; collect the second total forward active power and the second total forward reactive power at the current moment; collect the real-time power factor;

[0007] Calculating a comprehensive power factor within the first target time period according to the first total forward active energy, the first total forward reactive energy, the second total forward active energy, and the second total forward reactive energy;

[0008] The comprehensive reactive power allowed in the second target time period is set according to the comprehensive power factor, and the reactive power factor allowed in real time is set according to the real-time power factor; and the reactive power value required to be output is set according to the comprehensive reactive power allowed in the second target time period and the reactive power factor allowed in real time; wherein the initial moment of the second target time period is the current moment;

[0009] A control instruction is sent to the energy management system so that the energy management system distributes the required output reactive power value to each energy storage converter execution unit according to the control instruction.

[0010] As a preferred solution, the calculation formula of the comprehensive power factor is:

[0011] ;

[0012] Among them, k is the comprehensive power factor, Q1 is the first total forward active power, Q2 is the first total forward reactive power, Q3 is the second total forward active power, and Q4 is the second total forward reactive power.

[0013] As a preferred solution, the setting of the comprehensive reactive power allowed in the second target time period according to the comprehensive power factor is specifically:

[0014] When the comprehensive power factor is greater than or equal to the first power factor threshold, setting the comprehensive reactive power allowed in the second target time period to zero;

[0015] When the comprehensive power factor is less than the first power factor threshold, the energy storage converter is controlled to output reactive power within the second target time period so that the comprehensive power factor is equal to the first power factor threshold; and the comprehensive reactive power allowed within the second target time period is set according to the solution of the following formula:

[0016] ;

[0017] Among them, P Zis the comprehensive reactive power allowed in the second target time period, Q1 is the first total forward active power, Q2 is the first total forward reactive power, Q3 is the second total forward active power, Q4 is the second total forward reactive power, t is the time from the initial moment of the first target time period to the current moment, and k is the comprehensive power factor.

[0018] As a preferred solution, the real-time allowed reactive power factor is set according to the real-time power factor, specifically:

[0019] When the real-time power factor is greater than or equal to a second power factor threshold, setting the real-time allowed reactive power factor to zero;

[0020] When the real-time power factor is less than the second power factor threshold, the energy storage converter is controlled to emit reactive power so that the real-time power factor is equal to the second power factor threshold; the instantaneous active power and the instantaneous reactive power are collected, and according to the instantaneous active power and the instantaneous reactive power, the real-time allowed reactive power factor is set to:

[0021] ;

[0022] Among them, P n is the real-time allowed reactive power factor, P1 is the instantaneous active power, P2 is the instantaneous reactive power, is the real-time power factor.

[0023] As a preferred scheme, the required output reactive power value is set according to the comprehensive reactive power allowed in the second target time period and the real-time allowed reactive power factor, specifically: the larger of the comprehensive reactive power allowed in the second target time period and the real-time allowed reactive power factor is set as the required output reactive power value.

[0024] As a preferred solution, the energy storage power station is divided into a plurality of energy storage units; the required output reactive power value is respectively distributed to each energy storage converter execution unit, specifically:

[0025] Obtaining the remaining power of each of the energy storage units;

[0026] According to the order of the remaining power of each energy storage unit from high to low, and according to the reactive power value required to be output, the reactive power target output value of each energy storage unit is determined in sequence;

[0027] According to the reactive power target output value of each energy storage unit, the required output reactive power value is respectively distributed to each energy storage converter execution unit.

[0028] As a preferred solution, the reactive power target output value of each energy storage unit is determined in sequence, specifically:

[0029] Obtain the rated reactive power value of each energy storage unit;

[0030] In the case where the reactive power target output value of each of the energy storage units is less than or equal to the corresponding rated reactive power value, the reactive power target output value of each of the energy storage units is determined in sequence.

[0031] Accordingly, the embodiment of the present application also provides an energy management system control device for an energy storage power station, including a collection module, a calculation module, a setting module and a control module; wherein,

[0032] The acquisition module is used to acquire the first total forward active power and the first total forward reactive power at the initial moment of the first target time period; acquire the second total forward active power and the second total forward reactive power at the current moment; and acquire the real-time power factor;

[0033] The calculation module is used to calculate the comprehensive power factor within the first target time period according to the first total forward active power, the first total forward reactive power, the second total forward active power and the second total forward reactive power;

[0034] The setting module is used to set the comprehensive reactive power allowed in the second target time period according to the comprehensive power factor, and set the reactive power factor allowed in real time according to the real-time power factor; and set the required output reactive power value according to the comprehensive reactive power allowed in the second target time period and the reactive power factor allowed in real time; wherein the initial moment of the second target time period is the current moment;

[0035] The control module is used to send a control instruction to the energy management system, so that the energy management system distributes the required output reactive power value to each energy storage converter execution unit according to the control instruction.

[0036] As a preferred solution, the calculation formula of the comprehensive power factor is:

[0037] ;

[0038] Among them, k is the comprehensive power factor, Q1 is the first total forward active power, Q2 is the first total forward reactive power, Q3 is the second total forward active power, and Q4 is the second total forward reactive power.

[0039] As a preferred solution, the setting module sets the comprehensive reactive power allowed in the second target time period according to the comprehensive power factor, specifically:

[0040] When the comprehensive power factor is greater than or equal to the first power factor threshold, the setting module sets the comprehensive reactive power allowed in the second target time period to zero;

[0041] When the comprehensive power factor is less than the first power factor threshold, the setting module controls the energy storage converter to output reactive power within the second target time period so that the comprehensive power factor is equal to the first power factor threshold; and sets the comprehensive reactive power allowed within the second target time period to be:

[0042] ;

[0043] Among them, P Z is the comprehensive reactive power allowed in the second target time period, Q1 is the first total forward active power, Q2 is the first total forward reactive power, Q3 is the second total forward active power, Q4 is the second total forward reactive power, t is the time from the initial moment of the first target time period to the current moment, and k is the comprehensive power factor.

[0044] As a preferred solution, the setting module sets the real-time allowed reactive power factor according to the real-time power factor, specifically:

[0045] When the real-time power factor is greater than or equal to a second power factor threshold, the setting module sets the real-time allowed reactive power factor to zero;

[0046] When the real-time power factor is less than the second power factor threshold, the setting module controls the energy storage converter to emit reactive power so that the real-time power factor is equal to the second power factor threshold; collects instantaneous active power and instantaneous reactive power, and sets the real-time allowed reactive power factor to be:

[0047] ;

[0048] Among them, P n is the real-time allowed reactive power factor, P1 is the instantaneous active power, P2 is the instantaneous reactive power, is the real-time power factor.

[0049] As a preferred solution, the setting module sets the required output reactive power value based on the comprehensive reactive power allowed within the second target time period and the real-time allowed reactive power factor. Specifically, the setting module sets the larger of the comprehensive reactive power allowed within the second target time period and the real-time allowed reactive power factor as the required output reactive power value.

[0050] As a preferred solution, the energy storage power station is divided into a plurality of energy storage units; the control module distributes the required output reactive power value to each energy storage converter execution unit, specifically:

[0051] The control module obtains the remaining power of each of the energy storage units;

[0052] According to the order of the remaining power of each energy storage unit from high to low, and according to the reactive power value required to be output, the reactive power target output value of each energy storage unit is determined in sequence;

[0053] According to the reactive power target output value of each energy storage unit, the required output reactive power value is respectively distributed to each energy storage converter execution unit.

[0054] As a preferred solution, the control module determines the reactive power target output value of each energy storage unit in sequence, specifically:

[0055] The control module obtains the rated reactive power value of each energy storage unit;

[0056] In the case where the reactive power target output value of each of the energy storage units is less than or equal to the corresponding rated reactive power value, the reactive power target output value of each of the energy storage units is determined in sequence.

[0057] Correspondingly, an embodiment of the present application also provides a terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and when the processor executes the computer program, the energy management system control method of the energy storage power station is implemented.

[0058] Correspondingly, an embodiment of the present application also provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the energy management system control method of the energy storage power station.

[0059] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0060] The embodiment of the present application provides a control method, device, terminal device and computer-readable storage medium for an energy management system of an energy storage power station, wherein the control method comprises: collecting a first total forward active power and a first total forward reactive power at an initial moment of a first target time period; collecting a second total forward active power and a second total forward reactive power at a current moment; collecting a real-time power factor; calculating a comprehensive power factor within the first target time period according to the first total forward active power, the first total forward reactive power, the second total forward active power and the second total forward reactive power; setting a comprehensive reactive power allowed within a second target time period according to the comprehensive power factor, and setting a real-time allowed reactive power factor according to the real-time power factor; and setting a required output reactive power value according to the comprehensive reactive power allowed within the second target time period and the real-time allowed reactive power factor; wherein the initial moment of the second target time period is the current moment; sending a control instruction to the energy management system so that the energy management system distributes the required output reactive power value to each energy storage converter execution unit according to the control instruction. The present invention applies to setting the comprehensive reactive power allowed within the second target time period and the reactive power factor allowed in real time, and then determines the reactive power value required to be output by the energy storage power station to reduce the total reactive power. This method can improve the (comprehensive) power factor without cutting off the connection between the energy storage inverter and the power grid, avoid the reduction of equipment service life and available capacity of the power station caused by circuit breaker operation, and reduce the operating risk of the power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 : A flow chart of an embodiment of the energy management system control method of the energy storage power station provided by the present invention.

[0062] Figure 2 : A structural schematic diagram of an embodiment of an energy management system control device for an energy storage power station provided by the present invention. DETAILED DESCRIPTION

[0063] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0064] Embodiment 1

[0065] Please refer to Figure 1 , Figure 1 An energy management system control method for an energy storage power station provided by an embodiment of the present invention includes steps S1 to S4; wherein:

[0066] Step S1, collecting the first total forward active power and the first total forward reactive power at the initial moment of the first target time period; collecting the second total forward active power and the second total forward reactive power at the current moment; collecting the real-time power factor.

[0067] In this embodiment, the energy management system control method of the energy storage power station can be applied to computer devices, including but not limited to smart phones, laptops, tablet computers, desktop computers, and physical servers and cloud servers connected to display units. The energy management system is controlled by interacting with the energy storage power station, power grid, etc. through the above devices.

[0068] For example, an electric meter can be installed at the junction where the energy storage power station is connected to the power grid. The energy management system collects real-time power parameters from the electric meter, including but not limited to total forward active power, total forward reactive power, instantaneous active power, instantaneous reactive power, and real-time power factor, etc., for determining the control parameters of the energy management system.

[0069] Furthermore, the first target time period can be in units of one month, and the initial time of the first target time period is 0:00 a.m. on the 1st of this month. The first target time period can also be in units of one year or one week, which is determined according to the needs of the application scenario. For example, the relevant departments of the power grid use monthly assessment units, and the first target time period can be set to one month.

[0070] Step S2, calculating the comprehensive power factor within the first target time period according to the first total forward active power, the first total forward reactive power, the second total forward active power and the second total forward reactive power.

[0071] In this embodiment, the calculation formula of the comprehensive power factor is:

[0072] ;

[0073] Among them, k is the comprehensive power factor, Q1 is the first total forward active power, Q2 is the first total forward reactive power, Q3 is the second total forward active power, and Q4 is the second total forward reactive power.

[0074] The second total forward active power and the second total forward reactive power need to be collected in real time.

[0075] The comprehensive power factor k is used in the subsequent step to determine the comprehensive reactive power allowed within the second target time period, thereby determining the reactive power value required to be output.

[0076] Step S3, setting the comprehensive reactive power allowed in the second target time period according to the comprehensive power factor, and setting the real-time allowed reactive power factor according to the real-time power factor; and setting the required output reactive power value according to the comprehensive reactive power allowed in the second target time period and the real-time allowed reactive power factor; wherein the initial moment of the second target time period is the current moment.

[0077] As a preferred implementation, since the embodiment of the present application is directed to the operating state of the energy storage power station when it is stationary, the comprehensive reactive power allowed in the second target time period is set according to the comprehensive power factor, specifically:

[0078] When the comprehensive power factor is greater than or equal to the first power factor threshold, the comprehensive reactive power allowed in the second target time period is set to zero; wherein the first power factor threshold is a preset value, which may be an assessment power factor threshold of the power grid;

[0079] When the comprehensive power factor is less than the first power factor threshold, the energy storage converter is controlled to output reactive power in the second target time period to reduce reactive power, so that the comprehensive power factor is equal to the first power factor threshold; and the comprehensive reactive power allowed in the second target time period is set according to the solution of the following formula:

[0080] ;

[0081] Among them, P Z is the comprehensive reactive power allowed in the second target time period, Q1 is the first total forward active power, Q2 is the first total forward reactive power, Q3 is the second total forward active power, Q4 is the second total forward reactive power, t is the time from the initial moment of the first target time period to the current moment, and k is the comprehensive power factor.

[0082] Among them, the second target time period can be 8 hours, 12 hours or 24 hours, and the first power factor threshold can be 0.9. Taking 24 hours as an example, by calculating the comprehensive power factor k of the energy storage power station from 0:00 a.m. on the 1st of this month (the initial time of the first target time period) to the current time t in real time, the energy storage converter is controlled to emit reactive power in the next 24 hours to reduce reactive power, realize cyclic compensation and advance compensation, and ensure that the comprehensive power factor of the month meets the assessment requirements of relevant power grid departments.

[0083] As a preferred implementation manner, the real-time allowed reactive power factor is set according to the real-time power factor, specifically:

[0084] When the real-time power factor is greater than or equal to a second power factor threshold, setting the real-time allowed reactive power factor to zero;

[0085] When the real-time power factor is less than the second power factor threshold, the energy storage converter is controlled to emit reactive power so that the real-time power factor is equal to the second power factor threshold; the instantaneous active power and the instantaneous reactive power are collected, and according to the instantaneous active power and the instantaneous reactive power, the real-time allowed reactive power factor is set to:

[0086] ;

[0087] Among them, P n is the real-time allowed reactive power factor, P1 is the instantaneous active power, P2 is the instantaneous reactive power, is the real-time power factor.

[0088] The second power factor threshold value can be equal to the first power factor threshold value, that is, both are 0.9. In the implementation of this preferred embodiment, by collecting the power parameters at the connection point between the energy storage power station and the power grid, the real-time allowable reactive power factor of the energy storage power station is dynamically calculated according to the instantaneous active power, instantaneous reactive power and instantaneous power factor at the energy storage power station, and then the required output reactive power value is obtained, so that the real-time power factor of the energy storage power station can be improved.

[0089] In some embodiments, the reactive power value required to be output is set according to the comprehensive reactive power allowed in the second target time period and the reactive power factor allowed in real time, specifically: the larger of the comprehensive reactive power allowed in the second target time period and the reactive power factor allowed in real time is set as the reactive power value required to be output, that is, P out =max(P Z ,P n ), where P out In this way, by comprehensively considering the real-time instantaneous power factor and the comprehensive power factor in the first target time period, the reactive power output is adjusted in real time, which can ensure the stable operation of the energy storage power station and reduce the risk during the operation.

[0090] When the energy storage power station is in the charging or discharging state, the output reactive power value P out is 0.

[0091] Step S4, sending a control instruction to the energy management system, so that the energy management system distributes the required output reactive power value to each energy storage converter execution unit according to the control instruction.

[0092] In this embodiment, the energy storage power station is divided into a plurality of energy storage units; the required output reactive power value is respectively distributed to each energy storage converter execution unit, specifically:

[0093] Obtaining the remaining capacity (SOC) of each of the energy storage units;

[0094] According to the order of the remaining power of each energy storage unit from high to low, and according to the reactive power value required to be output, the reactive power target output value of each energy storage unit is determined in sequence;

[0095] According to the reactive power target output value of each energy storage unit, the required output reactive power value is respectively distributed to each energy storage converter execution unit.

[0096] Furthermore, the reactive power target output value of each of the energy storage units is determined in sequence, specifically:

[0097] Obtain the rated reactive power value of each energy storage unit; when the reactive power target output value of each energy storage unit is less than or equal to the corresponding rated reactive power value, determine the reactive power target output value of each energy storage unit in turn.

[0098] For example, the remaining capacity (or power or SOC) of each energy storage unit is sorted from high to low, namely A1, A2, A3, A4, etc., and the corresponding rated reactive power is B1, B2, B3, B4, etc. The required output reactive power value P out The power output is distributed in the corresponding order. Then the reactive power target output values ​​Pa1, Pa2, Pa3, Pa4, etc. of each energy storage unit are determined. Specifically, when Pa1=Pout, the subsequent Pa2, Pa3, Pa4, etc. are zero, and when Pa1=B1, Pa2=Pout-B1, Pa3, Pa4, Pa5, etc. are zero, and the subsequent reactive power target output values ​​of each energy storage unit are deduced in the same way. Thus, the energy management system EMS distributes the reactive power target output value to each energy storage converter execution unit.

[0099] Correspondingly, such as Figure 2 As shown, the embodiment of the present application also provides an energy management system control device for an energy storage power station, including a collection module 101, a calculation module 102, a setting module 103 and a control module 104; wherein,

[0100] The acquisition module 101 is used to acquire the first total forward active power and the first total forward reactive power at the initial moment of the first target time period; acquire the second total forward active power and the second total forward reactive power at the current moment; and acquire the real-time power factor;

[0101] The calculation module 102 is used to calculate the comprehensive power factor in the first target time period according to the first total forward active power, the first total forward reactive power, the second total forward active power and the second total forward reactive power;

[0102] The setting module 103 is used to set the comprehensive reactive power allowed in the second target time period according to the comprehensive power factor, and set the reactive power factor allowed in real time according to the real-time power factor; and set the required output reactive power value according to the comprehensive reactive power allowed in the second target time period and the reactive power factor allowed in real time; wherein the initial moment of the second target time period is the current moment;

[0103] The control module 104 is used to send a control instruction to the energy management system, so that the energy management system distributes the required output reactive power value to each energy storage converter execution unit according to the control instruction.

[0104] As a preferred solution, the calculation formula of the comprehensive power factor is:

[0105] ;

[0106] Among them, k is the comprehensive power factor, Q1 is the first total forward active power, Q2 is the first total forward reactive power, Q3 is the second total forward active power, and Q4 is the second total forward reactive power.

[0107] As a preferred solution, the setting module 103 sets the comprehensive reactive power allowed in the second target time period according to the comprehensive power factor, specifically:

[0108] When the comprehensive power factor is greater than or equal to the first power factor threshold, the setting module 103 sets the comprehensive reactive power allowed in the second target time period to zero;

[0109] When the comprehensive power factor is less than the first power factor threshold, the setting module 103 controls the energy storage converter to output reactive power within the second target time period so that the comprehensive power factor is equal to the first power factor threshold; and sets the comprehensive reactive power allowed within the second target time period to be:

[0110] ;

[0111] Among them, P Z is the comprehensive reactive power allowed in the second target time period, Q1 is the first total forward active power, Q2 is the first total forward reactive power, Q3 is the second total forward active power, Q4 is the second total forward reactive power, t is the time from the initial moment of the first target time period to the current moment, and k is the comprehensive power factor.

[0112] As a preferred solution, the setting module 103 sets the real-time allowed reactive power factor according to the real-time power factor, specifically:

[0113] When the real-time power factor is greater than or equal to a second power factor threshold, the setting module 103 sets the real-time allowed reactive power factor to zero;

[0114] When the real-time power factor is less than the second power factor threshold, the setting module 103 controls the energy storage converter to emit reactive power so that the real-time power factor is equal to the second power factor threshold; collects instantaneous active power and instantaneous reactive power, and sets the real-time allowed reactive power factor to be:

[0115] ;

[0116] Among them, P n is the real-time allowed reactive power factor, P1 is the instantaneous active power, P2 is the instantaneous reactive power, is the real-time power factor.

[0117] As a preferred solution, the setting module 103 sets the required output reactive power value based on the comprehensive reactive power allowed within the second target time period and the real-time allowed reactive power factor. Specifically, the setting module 103 sets the larger of the comprehensive reactive power allowed within the second target time period and the real-time allowed reactive power factor as the required output reactive power value.

[0118] As a preferred solution, the energy storage power station is divided into a plurality of energy storage units; the control module 104 distributes the required output reactive power value to each energy storage converter execution unit, specifically:

[0119] The control module 104 obtains the remaining power of each energy storage unit;

[0120] According to the order of the remaining power of each energy storage unit from high to low, and according to the reactive power value required to be output, the reactive power target output value of each energy storage unit is determined in sequence;

[0121] According to the reactive power target output value of each energy storage unit, the required output reactive power value is respectively distributed to each energy storage converter execution unit.

[0122] As a preferred solution, the control module 104 determines the reactive power target output value of each energy storage unit in sequence, specifically:

[0123] The control module 104 obtains the rated reactive power value of each energy storage unit;

[0124] In the case where the reactive power target output value of each of the energy storage units is less than or equal to the corresponding rated reactive power value, the reactive power target output value of each of the energy storage units is determined in sequence.

[0125] Correspondingly, an embodiment of the present application also provides a terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and when the processor executes the computer program, the energy management system control method of the energy storage power station is implemented.

[0126] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the terminal, and various interfaces and lines are used to connect various parts of the entire terminal.

[0127] The memory can be used to store the computer program, and the processor realizes various functions of the terminal by running or executing the computer program stored in the memory and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0128] Correspondingly, an embodiment of the present application also provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the energy management system control method of the energy storage power station.

[0129] Wherein, if the module integrated in the energy management system control device of the energy storage power station is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Wherein, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal and software distribution medium, etc.

[0130] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0131] The embodiment of the present application provides a control method, device, terminal device and computer-readable storage medium for an energy management system of an energy storage power station, wherein the control method comprises: collecting a first total forward active power and a first total forward reactive power at an initial moment of a first target time period; collecting a second total forward active power and a second total forward reactive power at a current moment; collecting a real-time power factor; calculating a comprehensive power factor within the first target time period according to the first total forward active power, the first total forward reactive power, the second total forward active power and the second total forward reactive power; setting a comprehensive reactive power allowed within a second target time period according to the comprehensive power factor, and setting a real-time allowed reactive power factor according to the real-time power factor; and setting a required output reactive power value according to the comprehensive reactive power allowed within the second target time period and the real-time allowed reactive power factor; wherein the initial moment of the second target time period is the current moment; sending a control instruction to the energy management system so that the energy management system distributes the required output reactive power value to each energy storage converter execution unit according to the control instruction. The present invention applies to setting the comprehensive reactive power allowed within the second target time period and the reactive power factor allowed in real time, and then determines the reactive power value required to be output by the energy storage power station to reduce the total reactive power. This method can improve the (comprehensive) power factor without cutting off the connection between the energy storage inverter and the power grid, avoid the reduction of equipment service life and available capacity of the power station caused by circuit breaker operation, and reduce the operating risk of the power station.

[0132] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for controlling an energy management system of an energy storage power station, It is characterized in that include: Collecting a first total forward active power and a first total forward reactive power at an initial moment of a first target time period; Collect the second positive active total electric quantity and the second positive reactive total electric quantity at the current moment; Collect real-time power factor; Calculating a comprehensive power factor within the first target time period according to the first total forward active energy, the first total forward reactive energy, the second total forward active energy, and the second total forward reactive energy; The comprehensive reactive power allowed in the second target time period is set according to the comprehensive power factor, and the reactive power factor allowed in real time is set according to the real-time power factor; and the reactive power value required to be output is set according to the comprehensive reactive power allowed in the second target time period and the reactive power factor allowed in real time; wherein the initial moment of the second target time period is the current moment; Sending a control instruction to the energy management system so that the energy management system distributes the required output reactive power value to each energy storage converter execution unit according to the control instruction; The calculation formula of the comprehensive power factor is: ； Wherein, k is the comprehensive power factor, Q1 is the first total forward active power, Q2 is the first total forward reactive power, Q3 is the second total forward active power, and Q4 is the second total forward reactive power; The step of setting the comprehensive reactive power allowed in the second target time period according to the comprehensive power factor is specifically as follows: When the comprehensive power factor is greater than or equal to the first power factor threshold, setting the comprehensive reactive power allowed in the second target time period to zero; When the comprehensive power factor is less than the first power factor threshold, the energy storage converter is controlled to output reactive power within the second target time period so that the comprehensive power factor is equal to the first power factor threshold; and the comprehensive reactive power allowed within the second target time period is set according to the solution of the following formula: ； Among them, P Z is the comprehensive reactive power allowed in the second target time period, Q1 is the first total forward active power, Q2 is the first total forward reactive power, Q3 is the second total forward active power, Q4 is the second total forward reactive power, t is the time from the initial moment of the first target time period to the current moment, and k is the comprehensive power factor; The step of setting the real-time allowed reactive power factor according to the real-time power factor is specifically as follows: When the real-time power factor is greater than or equal to a second power factor threshold, setting the real-time allowed reactive power factor to zero; When the real-time power factor is less than the second power factor threshold, the energy storage converter is controlled to emit reactive power so that the real-time power factor is equal to the second power factor threshold; the instantaneous active power and the instantaneous reactive power are collected, and according to the instantaneous active power and the instantaneous reactive power, the real-time allowed reactive power factor is set to: ； Among them, P n is the real-time allowed reactive power factor, P1 is the instantaneous active power, P2 is the instantaneous reactive power, is the real-time power factor.

2. The energy management system control method of an energy storage power station according to claim 1, It is characterized in that The reactive power value required to be output is set according to the comprehensive reactive power allowed within the second target time period and the reactive power factor allowed in real time, specifically: the larger of the comprehensive reactive power allowed within the second target time period and the reactive power factor allowed in real time is set as the reactive power value required to be output.

3. The energy management system control method of an energy storage power station according to claim 1, It is characterized in that The energy storage power station is divided into a plurality of energy storage units; the reactive power value required to be output is respectively distributed to each energy storage converter execution unit, specifically: Obtaining the remaining power of each of the energy storage units; According to the order of the remaining power of each energy storage unit from high to low, and according to the reactive power value required to be output, the reactive power target output value of each energy storage unit is determined in sequence; According to the reactive power target output value of each energy storage unit, the required output reactive power value is respectively distributed to each energy storage converter execution unit.

4. The energy management system control method of an energy storage power station according to claim 3, It is characterized in that The reactive power target output value of each energy storage unit is determined in sequence, specifically: Obtain the rated reactive power value of each energy storage unit; In the case where the reactive power target output value of each of the energy storage units is less than or equal to the corresponding rated reactive power value, the reactive power target output value of each of the energy storage units is determined in sequence.

5. An energy management system control device for an energy storage power station, It is characterized in that It includes an acquisition module, a calculation module, a setting module and a control module; wherein, The acquisition module is used to acquire the first total forward active power and the first total forward reactive power at the initial moment of the first target time period; acquire the second total forward active power and the second total forward reactive power at the current moment; and acquire the real-time power factor; The calculation module is used to calculate the comprehensive power factor within the first target time period according to the first total forward active power, the first total forward reactive power, the second total forward active power and the second total forward reactive power; The setting module is used to set the comprehensive reactive power allowed in the second target time period according to the comprehensive power factor, and set the reactive power factor allowed in real time according to the real-time power factor; and set the required output reactive power value according to the comprehensive reactive power allowed in the second target time period and the reactive power factor allowed in real time; wherein the initial moment of the second target time period is the current moment; The control module is used to send a control instruction to the energy management system, so that the energy management system distributes the required output reactive power value to each energy storage converter execution unit according to the control instruction; The calculation formula of the comprehensive power factor is: ； Wherein, k is the comprehensive power factor, Q1 is the first total forward active power, Q2 is the first total forward reactive power, Q3 is the second total forward active power, and Q4 is the second total forward reactive power; The setting module sets the comprehensive reactive power allowed in the second target time period according to the comprehensive power factor, specifically: When the comprehensive power factor is greater than or equal to the first power factor threshold, the setting module sets the comprehensive reactive power allowed in the second target time period to zero; When the comprehensive power factor is less than the first power factor threshold, the setting module controls the energy storage converter to output reactive power within the second target time period so that the comprehensive power factor is equal to the first power factor threshold; and sets the comprehensive reactive power allowed within the second target time period to be: ； Among them, P Z is the comprehensive reactive power allowed in the second target time period, Q1 is the first total forward active power, Q2 is the first total forward reactive power, Q3 is the second total forward active power, Q4 is the second total forward reactive power, t is the time from the initial moment of the first target time period to the current moment, and k is the comprehensive power factor; The setting module sets the real-time allowed reactive power factor according to the real-time power factor, specifically: When the real-time power factor is greater than or equal to a second power factor threshold, the setting module sets the real-time allowed reactive power factor to zero; When the real-time power factor is less than the second power factor threshold, the setting module controls the energy storage converter to emit reactive power so that the real-time power factor is equal to the second power factor threshold; collects instantaneous active power and instantaneous reactive power, and sets the real-time allowed reactive power factor to be: ； Among them, P n is the real-time allowed reactive power factor, P1 is the instantaneous active power, P2 is the instantaneous reactive power, is the real-time power factor.

6. A terminal device, It is characterized in that It comprises a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and when the processor executes the computer program, it implements the energy management system control method of the energy storage power station as described in any one of claims 1 to 4.

7. A computer-readable storage medium, It is characterized in that The computer-readable storage medium includes a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute the energy management system control method of the energy storage power station according to any one of claims 1 to 4.

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