Adaptive power replenishment control method and apparatus for user-side energy storage system, and device

Abstract

The present application relates to an adaptive power replenishment control method and apparatus for a user-side energy storage system, a computer device, a computer-readable storage medium, and a computer program product, applicable to the technical field of computers. The method comprises: acquiring current data of a user-side energy storage system, wherein the current data comprises load data of a user transformer, operation data of an energy storage converter, and the state of charge of an energy storage battery; on the basis of the current data, determining whether the user-side energy storage system satisfies power replenishment conditions, wherein the power replenishment conditions comprise a load condition of the user transformer, an off-peak electricity period condition, a state-of-charge condition of the energy storage battery, and a flat electricity period condition; when the user-side energy storage system satisfies the power replenishment conditions, determining, on the basis of the current data, a power replenishment instruction for the user-side energy storage system; and on the basis of the power replenishment instruction, controlling the user-side energy storage system to perform a power replenishment operation. The method can improve the accuracy of power replenishment control for the user-side energy storage system.

Description

Adaptive power supplement control method, device and equipment of user side energy storage system TECHNICAL FIELD

[0001] The present application relates to the technical field of computer, in particular to a kind of adaptive power supplement control method, device, computer equipment, computer readable storage medium and computer program product of user side energy storage system. BACKGROUND

[0002] With the development of electric power technology, user side energy storage system has important application in many fields. By analyzing the operation of user side energy storage system, it can be understood that reasonable power supplement strategy can improve the operation efficiency and reliability of user side energy storage system. Therefore, how to accurately control the power supplement of user side energy storage system has become an important research direction.

[0003] Traditional technology usually controls the power supplement of user side energy storage system by manually setting fixed charging period. However, this method cannot adapt to the dynamic changes of user load and energy storage system state, resulting in low accuracy of power supplement control of user side energy storage system.

[0004] SUMMARY

[0005] Therefore, it is necessary to provide an adaptive power supplement control method, device, computer equipment, computer readable storage medium and computer program product of user side energy storage system, which can improve the accuracy of power supplement control of user side energy storage system.

[0006] In a first aspect, the present application provides an adaptive power supplement control method of user side energy storage system. The method comprises:

[0007] Obtaining current data of user side energy storage system; the current data includes load data of user transformer, operation data of energy storage converter and state of charge of energy storage battery;

[0008] According to the current data, it is judged whether the user side energy storage system meets the power supplement condition; the power supplement condition includes load condition of user transformer, power consumption low valley period condition, state of charge condition of energy storage battery and power consumption flat period condition;

[0009] If the user side energy storage system meets the power supplement condition, according to the current data, the power supplement instruction of the user side energy storage system is determined;

[0010] According to the power supplement instruction, the power supplement operation of the user side energy storage system is controlled.

[0011] In one of the embodiments, the determining whether the user-side energy storage system meets the power compensation condition according to the current data comprises:

[0012] determining whether the user-side energy storage system meets a load condition of the user transformer according to the current data;

[0013] in the case that the user-side energy storage system meets the load condition of the user transformer, determining whether the user-side energy storage system meets the power consumption valley period condition;

[0014] in the case that the user-side energy storage system does not meet the power consumption valley period condition, determining whether the user-side energy storage system meets a state of charge condition of the energy storage battery;

[0015] in the case that the user-side energy storage system meets the state of charge condition of the energy storage battery, determining whether the user-side energy storage system meets a power consumption flat period condition;

[0016] in the case that the user-side energy storage system meets the power compensation condition, the method further comprises, before determining the power compensation instruction of the user-side energy storage system according to the current data:

[0017] in the case that the user-side energy storage system meets the power consumption flat period condition, confirming that the user-side energy storage system meets the power compensation condition.

[0018] In one of the embodiments, the method further comprises:

[0019] in the case that the user-side energy storage system does not meet the load condition of the user transformer, controlling the user-side energy storage system to perform a discharging operation;

[0020] in the case that the user-side energy storage system does not meet the state of charge condition of the energy storage battery, controlling the user-side energy storage system to perform a discharging operation;

[0021] in the case that the user-side energy storage system does not meet the power consumption flat period condition, controlling the user-side energy storage system to perform a discharging operation.

[0022] In one of the embodiments, in the case that the user-side energy storage system does not meet the power consumption valley period condition, the method further comprises, after determining whether the user-side energy storage system meets the state of charge condition of the energy storage battery:

[0023] in the case that the state of charge of the energy storage battery in the current data is greater than or equal to a first state of charge and less than a second state of charge, confirming that the user-side energy storage system meets the state of charge condition of the energy storage battery; the first state of charge is less than the second state of charge;

[0024] In a case where the state of charge of the energy storage battery in the current data is less than the first state of charge, it is determined that the user-side energy storage system satisfies the power compensation condition.

[0025] In one of the embodiments, in a case where the user-side energy storage system satisfies the load condition of the user transformer, after determining whether the user-side energy storage system satisfies the power consumption valley period condition, the method further comprises:

[0026] In a case where the user-side energy storage system satisfies the power consumption valley period condition, it is determined that the user-side energy storage system satisfies the power compensation condition.

[0027] In one of the embodiments, the determining, according to the current data, of the power compensation instruction of the user-side energy storage system comprises:

[0028] In a case where the power compensation type of the user-side energy storage system belongs to valley power compensation, the valley power compensation instruction of the user-side energy storage system is determined, according to the current data, as the power compensation instruction;

[0029] In a case where the power compensation type of the user-side energy storage system does not belong to valley power compensation, the non-valley power compensation instruction of the user-side energy storage system is determined, according to the current data, as the power compensation instruction.

[0030] In a second aspect, the present application further provides a self-adaptive power compensation control device of a user-side energy storage system. The device comprises:

[0031] a data acquisition module configured to acquire current data of the user-side energy storage system; the current data comprises load data of a user transformer, operation data of an energy storage converter, and a state of charge of an energy storage battery;

[0032] a condition determination module configured to determine, according to the current data, whether the user-side energy storage system satisfies a power compensation condition; the power compensation condition comprises a load condition of the user transformer, a power consumption valley period condition, a state of charge condition of the energy storage battery, and a power consumption flat period condition;

[0033] an instruction determination module configured to determine, according to the current data, a power compensation instruction of the user-side energy storage system in a case where the user-side energy storage system satisfies the power compensation condition;

[0034] a system control module configured to control the user-side energy storage system to perform a power compensation operation according to the power compensation instruction.

[0035] In a third aspect, the present application further provides a computer device. The computer device comprises a memory and a processor, the memory stores a computer program, and the processor implements the following steps when executing the computer program:

[0036] obtaining current data of the user-side energy storage system; the current data comprises load data of a user transformer, operation data of an energy storage converter, and a state of charge of an energy storage battery;

[0037] judging, according to the current data, whether the user-side energy storage system satisfies a power compensation condition; the power compensation condition comprises a load condition of the user transformer, a low power consumption period condition, a state of charge condition of the energy storage battery, and a power consumption flat period condition;

[0038] in a case where the user-side energy storage system satisfies the power compensation condition, determining, according to the current data, a power compensation instruction of the user-side energy storage system;

[0039] controlling the user-side energy storage system to perform a power compensation operation according to the power compensation instruction.

[0040] In a fourth aspect, the present application further provides a computer readable storage medium. The computer readable storage medium has a computer program stored thereon, and the computer program is executed by a processor to implement the following steps:

[0041] obtaining current data of the user-side energy storage system; the current data comprises load data of a user transformer, operation data of an energy storage converter, and a state of charge of an energy storage battery;

[0042] judging, according to the current data, whether the user-side energy storage system satisfies a power compensation condition; the power compensation condition comprises a load condition of the user transformer, a low power consumption period condition, a state of charge condition of the energy storage battery, and a power consumption flat period condition;

[0043] in a case where the user-side energy storage system satisfies the power compensation condition, determining, according to the current data, a power compensation instruction of the user-side energy storage system;

[0044] controlling the user-side energy storage system to perform a power compensation operation according to the power compensation instruction.

[0045] In a fifth aspect, the present application further provides a computer program product. The computer program product comprises a computer program, and the computer program is executed by a processor to implement the following steps:

[0046] obtaining current data of the user-side energy storage system; the current data comprises load data of a user transformer, operation data of an energy storage converter, and a state of charge of an energy storage battery;

[0047] judging, according to the current data, whether the user-side energy storage system satisfies a power compensation condition; the power compensation condition comprises a load condition of the user transformer, a low power consumption period condition, a state of charge condition of the energy storage battery, and a power consumption flat period condition;

[0048] In a case where the user-side energy storage system meets the power compensation condition, a power compensation instruction of the user-side energy storage system is determined according to the current data.

[0049] The user-side energy storage system is controlled to perform power compensation operation according to the power compensation instruction.

[0050] The adaptive power compensation control method, device, computer equipment, computer readable storage medium and computer program product of the user-side energy storage system obtain current data of the user-side energy storage system. The current data includes load data of a user transformer, operation data of an energy storage converter and a state of charge of an energy storage battery. Whether the user-side energy storage system meets a power compensation condition is determined according to the current data. The power compensation condition includes a load condition of the user transformer, a low electricity consumption period condition, a state of charge condition of the energy storage battery and a flat electricity consumption period condition. In a case where the user-side energy storage system meets the power compensation condition, a power compensation instruction of the user-side energy storage system is determined according to the current data. The user-side energy storage system is controlled to perform power compensation operation according to the power compensation instruction. The scheme obtains current data of the user-side energy storage system, determines whether the power compensation condition is met according to the current data, determines a power compensation instruction and controls the user-side energy storage system to perform power compensation in a case where the power compensation condition is met. The user-side energy storage system can adaptively perform power compensation according to actual conditions, the problem of insufficient energy storage power or improper charging power setting caused by a traditional fixed period charging strategy is avoided, the accuracy and efficiency of power compensation control of the user-side energy storage system are improved, the user-side energy storage system has sufficient power to meet peak clipping demand, and the risk of overload of the user transformer caused by energy storage charging is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments or the related art, the drawings needed to be used in the embodiments or the related art description will be briefly introduced. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor.

[0052] FIG. 1 is a flowchart of an adaptive power compensation control method of a user-side energy storage system in an embodiment;

[0053] FIG. 2 is a flowchart of steps of discharging operation in an embodiment;

[0054] FIG. 3 is a flowchart of steps of confirming that a condition is met in an embodiment;

[0055] FIG. 4 is a flowchart of an adaptive power compensation control method of a user-side energy storage system in another embodiment;

[0056] Fig. 5 is a flow diagram of steps of calculating power compensation instructions in an embodiment;

[0057] Fig. 6 is a structural block diagram of an adaptive power compensation control device of a user-side energy storage system in an embodiment;

[0058] Fig. 7 is an internal structural diagram of a computer device in an embodiment. DETAILED DESCRIPTION

[0059] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0060] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or authorized by all parties, and the collection, use and processing of related data need to comply with relevant regulations.

[0061] In an exemplary embodiment, as shown in Fig. 1, an adaptive power compensation control method of a user-side energy storage system is provided, and the present embodiment is exemplarily described by taking the method applied to a terminal. It should be understood that the method can also be applied to a server, and can also be applied to a system including a terminal and a server, and can be realized through the interaction between the terminal and the server. The terminal can be, but is not limited to, various personal computers, notebook computers, smart phones, tablet computers, etc.; the server can be a standalone physical server, or a server cluster or distributed system composed of multiple physical servers, or a cloud server providing cloud computing services. In the present embodiment, the method includes the following steps:

[0062] Step S101, current data of the user-side energy storage system is acquired; the current data includes load data of a user transformer, operation data of an energy storage converter and state of charge of an energy storage battery.

[0063] Step S102, whether the user-side energy storage system meets power compensation conditions is judged according to the current data; the power compensation conditions include load conditions of the user transformer, low electricity consumption period conditions, state of charge conditions of the energy storage battery and electricity consumption flat period conditions.

[0064] Step S103, power compensation instructions of the user-side energy storage system are determined according to the current data in the case that the user-side energy storage system meets the power compensation conditions.

[0065] Step S104, the user-side energy storage system is controlled to perform power compensation operation according to the power compensation instructions.

[0066] The user-side energy storage system can be an energy storage device system located at the power user end. For example, the user-side energy storage system can include main devices such as an energy storage line breaker, an energy storage converter, and an energy storage battery.

[0067] The current data can be data representing the current operating state of the user-side energy storage system. For example, the current data can include load data of the user transformer, operating data of the energy storage converter, and the state of charge of the energy storage battery.

[0068] The load data of the user transformer can be data representing the current load condition of the user transformer. For example, the load data of the user transformer can include the line current value at the low-voltage side of the transformer.

[0069] The operating data of the energy storage converter can be data representing the current operating state of the energy storage converter. For example, the operating data of the energy storage converter can include the active power instruction of the energy storage converter and the AC side line voltage value.

[0070] The state of charge of the energy storage battery can be a state quantity representing the current power level of the energy storage battery. For example, the state of charge of the energy storage battery can be represented by SOC (state of charge), indicating the percentage of stored power relative to the rated power.

[0071] The power compensation condition can be a condition triggering the user-side energy storage system to perform power compensation operation. For example, the power compensation condition can include the load condition of the user transformer, the low electricity valley period condition, the state of charge condition of the energy storage battery, and the electricity flat period condition.

[0072] The load condition of the user transformer can be a power compensation condition related to the load of the user transformer. For example, the load condition of the user transformer can be a condition for determining whether the calculated current of the transformer excluding the energy storage output exceeds the rated current.

[0073] The low electricity valley period condition can be a power compensation condition related to the low electricity valley period of the power grid. For example, the low electricity valley period condition can be a condition for determining whether the current time is in the preset low electricity valley period of the power grid.

[0074] The state of charge condition of the energy storage battery can be a power compensation condition related to the current power level of the energy storage battery. For example, the state of charge condition of the energy storage battery can include conditions for determining whether the current SOC is less than a preset smaller threshold and whether the current SOC is less than a preset larger threshold.

[0075] The electricity flat period condition can be a power compensation condition related to the electricity flat period of the power grid. For example, the electricity flat period condition can be a condition for determining whether the current time is in the preset electricity flat period of the power grid.

[0076] The power supplement instruction can be an instruction signal for controlling the user-side energy storage system to perform a power supplement operation. For example, the power supplement instruction can include a charging power instruction of the energy storage converter.

[0077] The power supplement operation can be an operation of charging the energy storage battery of the user-side energy storage system. For example, the power supplement operation can be charging the energy storage battery using grid power during a valley period or a flat period of grid power consumption, so as to improve the state of charge of the energy storage battery.

[0078] Optionally, the terminal acquires load data of the user transformer, operation data of the energy storage converter, and the state of charge of the energy storage battery in real time through monitoring equipment. When determining whether the user-side energy storage system meets the power supplement condition, the load condition of the user transformer, the valley period condition of power consumption, the state of charge condition of the energy storage battery, and the flat period condition of power consumption can be determined by comparing the current data with preset threshold values. When the user-side energy storage system meets the power supplement condition, a charging power instruction of the user-side energy storage system is calculated according to the current data, as the power supplement instruction. According to the power supplement instruction, the energy storage converter is controlled to perform a power supplement operation (charging operation) on the energy storage battery.

[0079] In the above adaptive power supplement control method of the user-side energy storage system, current data of the user-side energy storage system is acquired. The current data includes load data of the user transformer, operation data of the energy storage converter, and the state of charge of the energy storage battery. Whether the user-side energy storage system meets a power supplement condition is determined according to the current data. The power supplement condition includes a load condition of the user transformer, a valley period condition of power consumption, a state of charge condition of the energy storage battery, and a flat period condition of power consumption. When the user-side energy storage system meets the power supplement condition, a power supplement instruction of the user-side energy storage system is determined according to the current data. According to the power supplement instruction, the user-side energy storage system is controlled to perform a power supplement operation. This scheme acquires current data of the user-side energy storage system, and determines whether the power supplement condition is met according to the current data. When the power supplement condition is met, a power supplement instruction is determined, and the user-side energy storage system is controlled to perform power supplement. This is conducive to the user-side energy storage system adaptively performing power supplement according to actual conditions, avoids problems such as insufficient energy storage power or improper charging power setting caused by a traditional fixed period charging strategy, and thus is conducive to improving the accuracy and efficiency of power supplement control of the user-side energy storage system, ensuring that the user-side energy storage system has sufficient power to meet peak clipping demand, and reducing the risk of overloading of the user transformer caused by energy storage charging.

[0080] In one example embodiment, the terminal determines whether the user-side energy storage system meets the power compensation condition according to the current data, specifically including the following: determining whether the user-side energy storage system meets the load condition of the user transformer according to the current data; in the case where the user-side energy storage system meets the load condition of the user transformer, determining whether the user-side energy storage system meets the power consumption valley period condition; in the case where the user-side energy storage system does not meet the power consumption valley period condition, determining whether the user-side energy storage system meets the state of charge condition of the energy storage battery; in the case where the user-side energy storage system meets the state of charge condition of the energy storage battery, determining whether the user-side energy storage system meets the power consumption flat period condition; and in the case where the user-side energy storage system meets the power compensation condition, the terminal further determines the power compensation instruction of the user-side energy storage system according to the current data, and in the case where the user-side energy storage system meets the power consumption flat period condition, it is determined that the user-side energy storage system meets the power compensation condition.

[0081] Optionally, when the terminal determines whether the user-side energy storage system meets the power compensation condition according to the current data, it first determines whether the user-side energy storage system meets the load condition of the user transformer, and if so, further determines whether it meets the power consumption valley period condition; if it does not meet the power consumption valley period condition, it continues to determine whether it meets the state of charge condition of the energy storage battery; if it meets the state of charge condition of the energy storage battery, it continues to determine whether it meets the power consumption flat period condition; in the case where it meets the power consumption flat period condition, it is determined that the user-side energy storage system meets the power compensation condition, and then the terminal determines the power compensation instruction of the user-side energy storage system according to the current data.

[0082] For example, when the terminal determines whether the user-side energy storage system meets the load condition of the user transformer, it can compare the actual load current of the user transformer with the rated current value, and if the actual load current is less than or equal to the rated current value, it is determined that the user transformer meets the load condition; when determining whether it meets the power consumption valley period condition, it can compare the current time with the preset power price valley period, and if the current time is within the power price valley period, it is determined that the power consumption valley period condition is met; when determining whether it meets the state of charge condition of the energy storage battery, it can obtain the current state of charge of the energy storage battery and compare it with the preset threshold; and when determining whether it meets the power consumption flat period condition, it can compare the current time with the preset power consumption flat period.

[0083] The technical solution provided in this embodiment first determines the load condition of the user transformer, and then determines the power consumption valley period condition, the state of charge condition of the energy storage battery and the power consumption flat period condition, thereby determining whether the user-side energy storage system meets the power compensation condition, which is conducive to flexibly determining whether the energy storage battery needs to be compensated according to the actual situation, avoiding unnecessary charging operations, and thereby improving the accuracy and efficiency of the power compensation control of the user-side energy storage system.

[0084] In an example embodiment, referring to FIG. 2, the method further comprises the step of discharging the user-side energy storage system, specifically comprising the following contents:

[0085] In step S201, when the user-side energy storage system does not meet the load condition of the user transformer, the user-side energy storage system is controlled to discharge.

[0086] In step S202, when the user-side energy storage system does not meet the state of charge condition of the energy storage battery, the user-side energy storage system is controlled to discharge.

[0087] In step S203, when the user-side energy storage system does not meet the power consumption period condition, the user-side energy storage system is controlled to discharge.

[0088] The discharging operation can be an operation of supplying power to the outside by the energy storage battery, for example, the discharging operation can be an operation of controlling the energy storage battery to discharge and reducing the power supply transmitted by the power grid, which can be an operation of starting the energy storage peak shaving.

[0089] Optionally, the terminal controls the user-side energy storage system to discharge when the user-side energy storage system does not meet the load condition of the user transformer, does not meet the state of charge condition of the energy storage battery, or does not meet the power consumption period condition.

[0090] For example, when the terminal detects that the calculated line current of the transformer excluding the energy storage output is greater than the rated current of the user transformer, it is determined that the user-side energy storage system does not meet the load condition of the user transformer, and the user-side energy storage system is controlled to discharge; when it is detected that the state of charge of the energy storage battery is greater than or equal to a preset larger threshold (second state of charge) of the state of charge of the energy storage battery, it is determined that the user-side energy storage system does not meet the state of charge condition of the energy storage battery, and the user-side energy storage system is controlled to discharge; when it is detected that the current time is not within the power consumption period, it is determined that the user-side energy storage system does not meet the power consumption period condition, and the user-side energy storage system is controlled to discharge.

[0091] The technical scheme provided in the embodiment is advantageous in starting the energy storage discharge in time when the user power load exceeds the rated capacity of the transformer, the energy storage battery has sufficient power, or it is not in the power consumption period, thereby being advantageous in guaranteeing the user power demand, reducing the power grid load, and improving the reliability of system operation.

[0092] In an example embodiment, referring to FIG. 3, after determining whether the user-side energy storage system meets the state of charge condition of the energy storage battery, if the user-side energy storage system does not meet the power consumption valley period condition, the following is further included:

[0093] In step S301, if the state of charge of the energy storage battery in the current data is greater than or equal to a first state of charge and less than a second state of charge, it is determined that the user-side energy storage system meets the state of charge condition of the energy storage battery; the first state of charge is less than the second state of charge.

[0094] In step S302, if the state of charge of the energy storage battery in the current data is less than the first state of charge, it is determined that the user-side energy storage system meets the power compensation condition.

[0095] The first state of charge can be a first threshold of the preset state of charge of the energy storage battery, for example, the first state of charge can be a lower threshold of the preset state of charge of the energy storage battery. When the state of charge of the energy storage battery is lower than the first state of charge, it indicates that the remaining power of the energy storage battery is low, and charging is needed.

[0096] The second state of charge can be a second threshold of the preset state of charge of the energy storage battery, and the second state of charge is greater than the first state of charge, for example, the second state of charge can be an upper threshold of the preset state of charge of the energy storage battery. When the state of charge of the energy storage battery is higher than the second state of charge, it indicates that the remaining power of the energy storage battery is high, and charging is not needed.

[0097] Optionally, after determining whether the user-side energy storage system meets the state of charge condition of the energy storage battery, if the state of charge of the energy storage battery in the current data is greater than or equal to the first state of charge, and the state of charge of the energy storage battery in the current data is less than the second state of charge, it is determined that the user-side energy storage system meets the state of charge condition of the energy storage battery; if the state of charge of the energy storage battery in the current data is less than the first state of charge, it is determined that the user-side energy storage system meets the power compensation condition.

[0098] The technical scheme provided in the embodiment is advantageous in determining whether power compensation is needed according to the actual state of charge of the energy storage battery, avoiding the case that the energy storage battery has too low or too high power, and at the same time, when the state of charge of the energy storage battery is lower than the first state of charge, it is timely determined that the power compensation condition is met and the power compensation is started, thereby being advantageous in ensuring that the energy storage battery has sufficient power for peak shaving, and improving the reliability of the user-side energy storage system.

[0099] In an example embodiment, after determining whether the user-side energy storage system meets the power consumption valley period condition, the method further comprises: in the case that the user-side energy storage system meets the power consumption valley period condition, determining whether the user-side energy storage system meets the power compensation condition.

[0100] Optionally, the terminal determines whether the current time is in the preset power consumption valley period, and if so, determines that the user-side energy storage system meets the power compensation condition, and the charging process of the energy storage battery can be started; if the current time is not in the preset power consumption valley period, it is determined whether other power compensation conditions are met.

[0101] The technical scheme provided in the embodiment is advantageous in that, in the case that the user-side energy storage system meets the user transformer load condition, it is further determined whether the preset power consumption valley period is met, which is advantageous in that the energy storage charging is preferentially started when the power grid power consumption demand is low and the electricity price is low, and the transformer load is not increased due to charging in the power consumption peak period, thereby reducing the influence of energy storage charging on the power grid and improving the power utilization efficiency.

[0102] In an example embodiment, the power compensation instruction of the user-side energy storage system is determined according to the current data, and specifically comprises: in the case that the power compensation type of the user-side energy storage system is valley power compensation, the valley power compensation instruction of the user-side energy storage system is determined according to the current data as the power compensation instruction; and in the case that the power compensation type of the user-side energy storage system is not valley power compensation, the non-valley power compensation instruction of the user-side energy storage system is determined according to the current data as the power compensation instruction.

[0103] The power compensation type of the user-side energy storage system can refer to the charging mode of the user-side energy storage system in different periods, for example, the power compensation type of the user-side energy storage system can include valley power compensation in the power grid power consumption valley period and non-valley power compensation in the power grid power consumption non-valley period.

[0104] The valley power compensation instruction can refer to the energy storage charging power calculated according to the current collected user-side energy storage system operation data in the power grid power consumption valley period, for example, the valley power compensation instruction can be a power compensation instruction of the charging power value of the energy storage converter obtained through a preset algorithm according to the transformer load current, the energy storage battery SOC, the valley period duration and other parameters.

[0105] The non-valley power compensation instruction can refer to the energy storage charging power calculated according to the current collected user-side energy storage system operation data in the power grid power consumption non-valley period, for example, the non-valley power compensation instruction can be a power compensation instruction of the charging power value of the energy storage converter obtained through a preset algorithm.

[0106] Optionally, the terminal judges whether the current power compensation type belongs to valley power compensation; if it is valley power compensation, a valley power compensation instruction is calculated according to the current collected user-side energy storage system operation data through a preset valley power compensation model, as the power compensation instruction; if it is not valley power compensation, a non-valley power compensation instruction is calculated according to the current collected user-side energy storage system operation data through a preset non-valley power compensation model, as the power compensation instruction.

[0107] The technical scheme provided by the embodiment distinguishes between valley power compensation and non-valley power compensation, and calculates the power compensation instruction by using different power compensation modes respectively, which is beneficial to preferentially charging at the power grid low-load period, reducing the charging cost, and timely compensating power according to the transformer load at the non-valley period to avoid transformer overload, thereby being beneficial to improving the economy and reliability of the energy storage system operation and better playing the peak load shifting role.

[0108] The following describes the adaptive power compensation control method of the user-side energy storage system provided by the application by using an application example. The application example is used for the terminal.

[0109] The user-side energy storage usually includes main devices such as an energy storage line breaker, an energy storage converter, and an energy storage battery. In the user-side energy storage system operation process, the energy storage system bears the roles of peak load shifting and valley load filling, especially when the user transformer is overloaded, the peak load shifting role of the energy storage is more important. However, the prerequisite for the energy storage peak load shifting is that the energy storage must have sufficient chargeable capacity. Therefore, the key to the peak load shifting is the energy storage power compensation. That is, at any time, the energy storage must have sufficient capacity for discharging in the peak load shifting. The so-called peak load shifting is that when the user power consumption exceeds the rated capacity of the transformer or exceeds the user demand, the energy storage system discharges to reduce the power supply transmitted through the user transformer. The so-called power compensation (or valley load filling) is that the energy storage starts the charging process in the system low-load period or the battery system capacity is low. The application example is mainly used for solving how to reliably, economically, and adaptively compensate power in the user-side peak load shifting scenario.

[0110] The main function of the user-side energy storage system is peak load shifting and valley load filling, and the power compensation strategy is particularly important for the user-side energy storage with more urgent demand for the peak load shifting function. The application example can automatically decide the charging time and power of the energy storage according to the period, the load of the user transformer, and the SOC (percentage of the rated capacity) of the battery system according to the established program, and timely meet the battery storage capacity to ensure sufficient energy for discharging in the peak load shifting period.

[0111] Referring to FIG. 4, the adaptive power compensation strategy of the user-side energy storage system for peak clipping of the present application embodiment includes a power compensation strategy during a non-system power consumption valley period and a power compensation strategy during a system power consumption valley period. The specific strategy includes two parts of power compensation condition judgment and power compensation instruction calculation program. The power compensation condition judgment is logically calculated and judged by collecting the user transformer load, the active instruction of the PCS (energy storage converter), and the SOC of the battery. The power compensation condition judgment includes at least four aspects of judgment, which are: 01 whether the transformer user load is overloaded, 02 whether it is in a valley period, 03 whether the battery SOC is less than a certain small constant value, and 04 whether the battery SOC is less than a larger constant value and whether it is in a system power consumption flat period. For example, referring to FIG. 4, the overall process is: collecting the load data of the user transformer, the operation data of the energy storage converter, and the state of charge of the energy storage battery; entering the process of power compensation start condition judgment, judging whether the transformer is overloaded, if yes, starting the energy storage peak clipping process (discharging), if no, going to the next step; judging whether it is in a valley period, if yes, starting the charging power compensation process, if no, going to the next step; judging whether the state of charge < the first state of charge, if yes, starting the charging power compensation process, if no, going to the next step; judging whether the state of charge < the second state of charge, if no, starting the energy storage peak clipping process, if yes, going to the next step; judging whether it is in a flat period, if no, starting the energy storage peak clipping process, if yes, starting the charging power compensation process.

[0112] 01 whether the transformer user load is overloaded is determined by judging the size of the power load (except for energy storage) carried by the transformer. The real-time load of the transformer at each moment can be calculated by formula (1). Formula (1):

[0113] In formula (1), I tran (t) is the calculated line current (A) of the transformer excluding the output of the energy storage, I meter (t) is the line current value (A) of the low side of the transformer measured by the power terminal, P pcs (t), U PCS are the active instruction (kW) of the energy storage converter and the AC side line voltage (V) respectively, P pcs (t) is positive indicating discharging, P pcs (t) is negative indicating charging. When the calculated I tran (t) is greater than the rated current (the value can be input from the monitoring interface) indicating that the load has exceeded the limit, the energy storage system (i.e. the user-side energy storage system) should be in peak clipping operation mode. Otherwise, continue to judge the truth or falsehood of other conditions.

[0114] 02 Whether to determine in the low valley period, is through the computer system time whether in a certain established low valley period (can input value in monitoring system), if true, enter the power compensation process; otherwise, continue to determine.

[0115] 03 Whether the battery SOC is less than a certain smaller constant value, is to compare the collected SOC value with the constant value a (which can be input in the monitoring system interface), when SOC is less than a, enter the power compensation process, otherwise continue to determine.

[0116] 04 Whether the battery SOC is less than a larger constant value b and whether it is in the power consumption level, when SOC is less than b, and the period is in the flat section, enter the power compensation process, otherwise, do not enter the power compensation process.

[0117] The core of the power compensation process is the calculation of the charging command. Referring to Figure 5, in order to balance the risk of transformer overload and the requirement of low rate charging of energy storage system, the adaptive calculation of power compensation of energy storage system P pcs (Charging command is negative), the charging command of energy storage system (i.e. user side energy storage system) in the non-system power consumption low valley period at t+1 (t can represent the current time) can be calculated by formula (2). The following is formula (2):

[0118] In the above formula (2), P is the active power command of energy storage at t+1 (kW); I tran (t) is the calculated line current of transformer excluding energy storage output (A), which can be calculated by formula (1); I meter (t) is the line current value of transformer low side measured by power consumption terminal (A); U PCS is the AC side line voltage of energy storage converter (V). The recursive formula composed of formula (2) and formula (1) is suitable for 1-2s operation period for cyclic calculation, which can effectively prevent the occurrence of system charging oscillation phenomenon caused by measurement lag.

[0119] The charging power of the power compensation process system power consumption low valley period can be calculated by formula (3), formula (4) and formula (5).

[0120] Formula (3):

[0121] Formula (4):

[0122] Formula (5):

[0123] Formula (3) is similar to formula (2), which is the maximum charging power (negative value, maximum absolute value) during power compensation, and needs to be combined with formula (1) to carry out rolling calculation. Formula (4) can ensure that the energy storage system can be charged to 100% within the specified number of hours of the valley period. Among them, is the intermediate value of the charging instruction of the energy storage system at t+1 time (kW), SOC start is the SOC value (%) of the start of energy compensation of the energy storage system; Num t is the number of hours of the valley period; W N is the rated energy (kWh) of the energy storage system; P N is the rated power (kW) of the energy storage system; k soc is a coefficient greater than 1 (which can be 1.1-1.5), which mainly considers that the energy storage will be limited power operation when charging at high SOC. In order to ensure that the energy storage battery can be fully charged within the specified time, the average charging power instruction of the energy storage needs to be amplified. is the charging instruction (kW) of the energy storage system during the system valley period power compensation, which can be selected according to formula (5) P N The absolute minimum value of the three is the charging power instruction during power compensation. For example, referring to FIG. 5, after starting the cycle compensation, it is judged whether it is a valley compensation. If so, the valley compensation instruction is calculated, and if not, the non-valley compensation instruction is calculated.

[0124] The technical scheme provided by the application example realizes that the peak shaving function is placed in the first place, and then according to the load of the transformer, the SOC state, and the power consumption period, the energy storage charging strategies for the non-system power consumption valley estimation period and the system power consumption valley period are respectively proposed. The charging strategy has obvious adaptive ability, can adaptively charge in real time by collecting the running parameters of the transformer, the battery SOC, etc., meets the peak shaving function of the user, and the compensation strategy can set parameter constants on the monitoring interface to adapt to different application occasions, and has wide adaptability.

[0125] It should be understood that although each step in the flowchart involved in each of the above-described embodiments is shown in sequence according to the arrow, these steps are not necessarily executed in sequence according to the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other sequences. Moreover, at least part of the steps in the flowchart involved in each of the above-described embodiments can include multiple steps or stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence of these steps or stages is not necessarily sequential, but can be executed in rotation or alternation with at least part of other steps or steps or stages in other steps.

[0126] Based on the same inventive concept, the embodiments of the present application further provide a user-side energy storage system adaptive power supplement control device for implementing the user-side energy storage system adaptive power supplement control method described above. The device provides a solution implementation similar to the implementation described in the above method, so the specific limitations in one or more user-side energy storage system adaptive power supplement control device embodiments provided below can refer to the limitations of the user-side energy storage system adaptive power supplement control method described above, which will not be repeated here.

[0127] In an exemplary embodiment, as shown in FIG. 6, a user-side energy storage system adaptive power supplement control device is provided, which can include:

[0128] A data acquisition module 601 is configured to acquire current data of the user-side energy storage system; the current data includes load data of the user transformer, operation data of the energy storage converter, and state of charge of the energy storage battery;

[0129] A condition judgment module 602 is configured to judge whether the user-side energy storage system meets a power supplement condition according to the current data; the power supplement condition includes a load condition of the user transformer, a low electricity consumption period condition, a state of charge condition of the energy storage battery, and a flat electricity consumption period condition;

[0130] An instruction determination module 603 is configured to determine a power supplement instruction of the user-side energy storage system according to the current data in the case that the user-side energy storage system meets the power supplement condition;

[0131] A system control module 604 is configured to control the user-side energy storage system to perform a power supplement operation according to the power supplement instruction.

[0132] In an exemplary embodiment, the condition judgment module 602 is further configured to judge whether the user-side energy storage system meets the load condition of the user transformer according to the current data; in the case that the user-side energy storage system meets the load condition of the user transformer, judge whether the user-side energy storage system meets the low electricity consumption period condition; in the case that the user-side energy storage system does not meet the low electricity consumption period condition, judge whether the user-side energy storage system meets the state of charge condition of the energy storage battery; in the case that the user-side energy storage system meets the state of charge condition of the energy storage battery, judge whether the user-side energy storage system meets the flat electricity consumption period condition; the device 600 further includes a first confirmation module configured to confirm that the user-side energy storage system meets the power supplement condition in the case that the user-side energy storage system meets the flat electricity consumption period condition.

[0133] In an example embodiment, the apparatus 600 further comprises a discharge control module configured to control the user-side energy storage system to perform a discharge operation in a case where the user-side energy storage system does not satisfy a load condition of the user transformer, in a case where the user-side energy storage system does not satisfy a state of charge condition of the energy storage battery, and in a case where the user-side energy storage system does not satisfy a power consumption valley period condition.

[0134] In an example embodiment, the apparatus 600 further comprises a second confirmation module configured to confirm that the user-side energy storage system satisfies the state of charge condition of the energy storage battery in a case where the state of charge of the energy storage battery in the current data is greater than or equal to a first state of charge and less than a second state of charge, the first state of charge being less than the second state of charge, and confirm that the user-side energy storage system satisfies the power compensation condition in a case where the state of charge of the energy storage battery in the current data is less than the first state of charge.

[0135] In an example embodiment, the apparatus 600 further comprises a third confirmation module configured to confirm that the user-side energy storage system satisfies the power compensation condition in a case where the user-side energy storage system satisfies the power consumption valley period condition.

[0136] In an example embodiment, the instruction determination module 603 is further configured to determine, as the power compensation instruction, a valley power compensation instruction of the user-side energy storage system according to the current data in a case where a power compensation type of the user-side energy storage system belongs to valley power compensation, and determine, as the power compensation instruction, a non-valley power compensation instruction of the user-side energy storage system according to the current data in a case where the power compensation type of the user-side energy storage system does not belong to valley power compensation.

[0137] The above-mentioned modules of the adaptive power compensation control apparatus of the user-side energy storage system can be realized by software, hardware, or a combination thereof, in whole or in part. The above-mentioned modules can be embedded in or independent of a processor in a computer device in hardware form, or stored in a memory in a computer device in software form, so as to be called and executed by a processor to perform the operations corresponding to the above-mentioned modules.

[0138] In an example embodiment, a computer device is provided, which can be a terminal, and an internal structure diagram of the computer device can be as shown in FIG. 7. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium to run. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals in a wired or wireless manner, and the wireless manner can be achieved through WIFI, mobile cellular network, NFC (near field communication) or other technologies. The computer program is executed by the processor to implement a user-side energy storage system adaptive power compensation control method. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer overlaid on the display screen, or a key, trackball or touchpad arranged on the shell of the computer device, or an external keyboard, touchpad or mouse, etc.

[0139] Those skilled in the art can understand that the structure shown in FIG. 7 is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme of the present application is applied. A specific computer device can include more or fewer components than those shown in the figure, or combine certain components, or have a different component arrangement.

[0140] In an example embodiment, a computer device is also provided, which includes a memory and a processor, the memory stores a computer program, and the processor executes the computer program to implement the steps in each of the above method embodiments.

[0141] In an example embodiment, a computer readable storage medium is provided, which stores a computer program, and the computer program is executed by a processor to implement the steps in each of the above method embodiments.

[0142] In an example embodiment, a computer program product is provided, which includes a computer program, and the computer program is executed by a processor to implement the steps in each of the above method embodiments.

[0143] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when the computer program is executed, the processes of the above-mentioned embodiments of the methods can be included. Any reference to memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (Read-Only Memory, ROM), magnetic tape, floppy disk, flash memory, optical storage, high-density embedded non-volatile memory, resistive memory (ReRAM), magnetoresistive memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric memory (Ferroelectric Random Access Memory, FRAM), phase change memory (Phase Change Memory, PCM), graphene memory, etc. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, etc. As an illustration but not limitation, RAM can be in various forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), etc. The database involved in the embodiments provided in the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided in the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., without being limited thereto.

[0144] Any combination of the technical features of the above embodiments can be made. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0145] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An adaptive power replenishment control method for a user-side energy storage system, characterized in that, The method includes: Obtain current data of the user-side energy storage system; the current data includes load data of the user transformer, operating data of the energy storage converter, and state of charge of the energy storage battery; Based on the current data, determine whether the user-side energy storage system meets the power replenishment conditions; the power replenishment conditions include the load conditions of the user transformer, the conditions during off-peak hours, the state of charge conditions of the energy storage battery, and the conditions during peak hours of electricity consumption. If the user-side energy storage system meets the replenishment conditions, a replenishment command for the user-side energy storage system is determined based on the current data. According to the power replenishment command, the user-side energy storage system is controlled to perform a power replenishment operation.

2. The method according to claim 1, characterized in that, The step of determining whether the user-side energy storage system meets the power replenishment conditions based on the current data includes: Based on the current data, determine whether the user-side energy storage system meets the load conditions of the user transformer; If the user-side energy storage system meets the load conditions of the user transformer, determine whether the user-side energy storage system meets the off-peak electricity demand conditions. If the user-side energy storage system does not meet the conditions for the off-peak electricity consumption period, determine whether the user-side energy storage system meets the state of charge conditions of the energy storage battery. If the user-side energy storage system meets the state of charge conditions of the energy storage battery, determine whether the user-side energy storage system meets the user-side energy consumption period conditions. Before determining the power replenishment command for the user-side energy storage system based on the current data, if the user-side energy storage system meets the power replenishment conditions, the method further includes: If the user-side energy storage system meets the power consumption period conditions, then the user-side energy storage system is confirmed to meet the power replenishment conditions.

3. The method according to claim 2, characterized in that, The method further includes: If the user-side energy storage system does not meet the load conditions of the user transformer, the user-side energy storage system is controlled to perform a discharge operation. If the user-side energy storage system does not meet the state of charge conditions of the energy storage battery, the user-side energy storage system is controlled to perform a discharge operation. If the user-side energy storage system does not meet the power consumption period conditions, the user-side energy storage system is controlled to perform a discharge operation.

4. The method according to claim 2, characterized in that, If the user-side energy storage system does not meet the off-peak electricity demand conditions, after determining whether the user-side energy storage system meets the state of charge conditions of the energy storage battery, the method further includes: If the state of charge of the energy storage battery in the current data is greater than or equal to the first state of charge and less than the second state of charge, it is confirmed that the user-side energy storage system meets the state of charge condition of the energy storage battery; the first state of charge is less than the second state of charge. If the state of charge of the energy storage battery in the current data is less than the first state of charge, it is confirmed that the user-side energy storage system meets the charging conditions.

5. The method according to claim 2, characterized in that, After determining whether the user-side energy storage system meets the load conditions of the user transformer, and assuming the user-side energy storage system meets the off-peak electricity demand conditions, the method further includes: If the user-side energy storage system meets the conditions for the off-peak electricity consumption period, then it is confirmed that the user-side energy storage system meets the conditions for power replenishment.

6. The method according to claim 1, characterized in that, The step of determining the power replenishment command for the user-side energy storage system based on the current data includes: When the power replenishment type of the user-side energy storage system is off-peak power replenishment, the off-peak power replenishment command of the user-side energy storage system is determined based on the current data and used as the power replenishment command; If the power replenishment type of the user-side energy storage system is not off-peak power replenishment, the non-off-peak power replenishment command of the user-side energy storage system is determined based on the current data and used as the power replenishment command.

7. An adaptive power replenishment control device for a user-side energy storage system, characterized in that, The device includes: The data acquisition module is used to acquire the current data of the user-side energy storage system; the current data includes the load data of the user transformer, the operating data of the energy storage converter, and the state of charge of the energy storage battery; The condition judgment module is used to determine whether the user-side energy storage system meets the power replenishment conditions based on the current data; the power replenishment conditions include the load conditions of the user transformer, the conditions during off-peak hours, the state of charge conditions of the energy storage battery, and the conditions during peak hours of electricity consumption. The instruction determination module is used to determine the power replenishment instruction of the user-side energy storage system based on the current data when the user-side energy storage system meets the power replenishment conditions. The system control module is used to control the user-side energy storage system to perform a power replenishment operation according to the power replenishment command.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

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