Energy storage system, energy storage converter control method thereof and computer program product

Abstract

The invention provides an energy storage system, an energy storage converter control method thereof and a computer program product. The energy storage converter control method of the energy storage system comprises the steps of collecting load data of load equipment using electric energy of the energy storage system; a control instruction is sent to an energy storage converter according to the load data, and the energy storage converter executes the control instruction so that power generation equipment and energy storage equipment connected with the energy storage converter can meet the power supply requirement of the operation mode of the energy storage system; obtaining energy storage operation data after the control instruction is executed, wherein the energy storage operation data comprises an energy storage converter, power generation equipment and operation state data of the energy storage equipment; generating a materialized energy data view by using the integrated energy storage operation data; and synchronizing the materialized energy data view to the energy storage cloud control platform. The scheme provided by the invention has the characteristic of quick and efficient control of the local controller, can meet the requirement of an operation mode, and realizes efficient operation of the whole energy storage system.

Description

Technical Field

[0001] The present invention relates to the field of microgrid control, and in particular to an energy storage system and an energy storage converter control method and a computer program product thereof. Background Art

[0002] A power converter system (PCS) is a key device used to connect energy storage devices (such as battery packs), power generation equipment (such as photovoltaic panels, wind turbines), power grids, and loads. Power converters usually include bidirectional power conversion functions, which can convert direct current (DC) into alternating current (AC), or convert AC into direct current to facilitate energy storage and release. The power converter plays a vital role in the energy storage system because it is responsible for the conversion, management, and regulation of energy.

[0003] The existing control method of energy storage inverters is generally to collect data from local devices and control according to the set control program. It only considers the status of the equipment within the control range and cannot comprehensively consider the overall situation of the external power grid. Therefore, when the operating status of other energy storage systems and the operating status of the power grid side change, targeted adjustments cannot be made in time. In response to the above-mentioned defects of the local controller, some methods of remote control using cloud devices or network devices have been proposed in the prior art. However, this method requires a higher data transmission capacity to ensure the reliability and real-time nature of the transmission. As the scale of the energy storage system increases, the complexity of the control system also increases, making design and maintenance more difficult. Summary of the invention

[0004] An object of the present invention is to provide an energy storage system and an energy storage converter control method and a computer program product thereof.

[0005] A further object of the present invention is to improve control efficiency and reduce the requirements on data transmission capacity.

[0006] Another further object of the present invention is to meet the demand for electric energy in different scenarios.

[0007] Another further purpose of the present invention is to combine the energy storage cloud control platform and the power management cloud platform to realize data interaction between different cloud platforms and achieve functional goals of different devices.

[0008] In particular, the present invention provides a method for controlling an energy storage converter of an energy storage system. The method comprises:

[0009] Collect load data of load equipment using electric energy from the energy storage system; Sending control instructions to the energy storage converter according to the load data, and the energy storage converter executing the control instructions, so that the power generation equipment and energy storage equipment connected to the energy storage converter meet the power supply requirements of the energy storage system operation mode; Acquire energy storage operation data after executing the control instruction, the energy storage operation data including operation status data of the energy storage converter, the power generation equipment, and the energy storage equipment; Integrate energy storage operation data and use the integrated energy storage operation data to generate materialized energy data views; Synchronize materialized energy data views to the energy storage cloud control platform.

[0010] Optionally, after the step of synchronizing the materialized energy data view to the energy storage cloud control platform, the method further includes: Obtaining the mode adjustment instructions determined by the energy storage cloud control platform based on the materialized energy data view; The energy storage system operation mode is re-determined according to the mode adjustment instruction.

[0011] Optionally, the energy storage system operation mode includes a green mode, and In green mode, the power supply requirement is that the power generation equipment and the energy storage equipment supply power to the load equipment with the power corresponding to the load data.

[0012] Optionally, the energy storage system operation mode includes an economic mode, and In economic mode, the power supply requirement is to minimize the overall operating cost of the power generation equipment and energy storage equipment within the set operating cycle.

[0013] Optionally, the step of collecting load data of a load device using electric energy of the energy storage system includes: Sending a data reading request to the load device using a data communication interface connected to the load device data; The load data from the load device in response to the data reading request is received through the data communication interface.

[0014] Optionally, after the step of collecting load data of load devices using the electric energy of the energy storage system, the method further includes: Match the load data with the power supply capacity corresponding to the energy storage system operation mode; If there is no match, a load adjustment request is sent to the load device, and the load device determines whether to respond to the load adjustment request.

[0015] Optionally, the step of the load device determining whether to respond to the load adjustment request includes: Obtain the operating target of the load equipment, which is issued by the power management cloud platform connected to the load equipment data; Determine whether the load equipment responding to the load adjustment request meets the conditions for achieving the operation target; If so, the load device determines to respond to the load adjustment request.

[0016] Optionally, when it is determined that the load device responding to the load adjustment request cannot meet the conditions for achieving the operation target, an operation target adjustment request is sent to the power management cloud platform; If the power consumption management cloud platform responds to the operation target adjustment request with a reply indicating that adjustment is allowed, the operation target is adjusted, and the load device determines to respond to the load adjustment request; If the power management cloud platform's response to the operation target adjustment request indicates that adjustment is not allowed or the power management cloud platform's response to the operation target adjustment request is not received, the load device determines not to respond to the load adjustment request.

[0017] Optionally, the step of sending energy storage operation data to the energy storage cloud control platform of the energy storage system includes: Integrate energy storage operation data and use the integrated energy storage operation data to generate materialized energy data views; Synchronize materialized energy data views to the energy storage cloud control platform.

[0018] According to another aspect of the present invention, there is further provided a computer program product, comprising a computer program, which, when executed by a processor, implements the steps of any of the above-mentioned energy storage converter control methods for energy storage systems.

[0019] According to another aspect of the present invention, there is also provided a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of any of the above-mentioned energy storage converter control methods for energy storage systems are implemented.

[0020] According to another aspect of the present invention, there is also provided a control device for an energy storage converter, which includes a memory, a processor and a computer program stored in the memory, and the processor executes the computer program to implement the steps of any of the above-mentioned energy storage converter control methods for the energy storage system.

[0021] According to another aspect of the present invention, there is also provided an energy storage system, which includes: power generation equipment; energy storage equipment; load equipment; an energy storage inverter, which is respectively connected to the power generation equipment and the energy storage equipment and is configured to convert electrical energy into a form; a control device for the above-mentioned energy storage inverter; and an energy storage cloud control platform, which is communicatively connected to the control device.

[0022] The energy storage inverter control method of the energy storage system of the present invention is that the control device of the energy storage inverter collects the load data of the load equipment that uses the electric energy of the energy storage system; the energy storage inverter is controlled according to the load data, and the control target is that the power generation equipment and energy storage equipment connected to the energy storage inverter meet the power supply requirements of the energy storage system operation mode. It has the characteristics of fast and efficient control of the local controller, and can meet the requirements of the operation mode, and realize the overall efficient operation of multiple energy storage systems. During the control process, the operating status data of the energy storage inverter, the power generation equipment, and the energy storage equipment are sent to the energy storage cloud control platform of the energy storage system through the local controller, which provides a data basis for the further development and utilization of the data of the energy storage system, reduces the communication transmission pressure of the energy storage cloud control platform, and reduces the complexity of system control.

[0023] Furthermore, the energy storage converter control method of the energy storage system of the present invention improves the data interaction process between the control device of the energy storage converter and the energy storage cloud control platform, generates the integrated energy storage operation data into an atomized energy data view, and uses the data view synchronization method to achieve synchronization. This data system method reduces the transmission of invalid data, improves the data security level, and helps to improve the data processing efficiency of the energy storage cloud control platform.

[0024] Furthermore, in the energy storage inverter control method of the energy storage system of the present invention, the energy storage cloud control platform determines the mode adjustment instruction according to the operating data uploaded by the control device of the energy storage inverter, and determines the operating mode of the energy storage system by means of big data and the data processing capability of the cloud platform, provides control guidance for the control device of the energy storage inverter, clarifies the control target, avoids the control device being limited to local device control, and realizes coordinated control of different energy storage systems.

[0025] Furthermore, the energy storage converter control method of the energy storage system of the present invention can be configured with a variety of energy storage system operation modes, and provides improved power supply requirements for each mode, thereby meeting the respective requirements of the energy storage system, load equipment, and power grid, and achieving good economic benefits and social value.

[0026] Furthermore, the energy storage converter control method of the energy storage system of the present invention, the control device of the energy storage converter can also coordinate the load equipment to adjust the state, realize load-side management, and achieve coordinated control of load equipment of different energy storage systems with the help of the power management cloud platform.

[0027] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0029] Figure 1 is a schematic diagram of the architecture of an energy storage system according to an embodiment of the present invention; Figure 2 is a schematic diagram of a method for controlling an energy storage converter of an energy storage system according to an embodiment of the present invention; Figure 3 is a control flow chart of an economic mode of an energy storage converter control method according to an embodiment of the present invention; Figure 4 is a control flow chart of a green mode of an energy storage converter control method according to an embodiment of the present invention; Figure 5 is a schematic diagram of adjusting the operating state of a load device in a method for controlling an energy storage converter of an energy storage system according to an embodiment of the present invention; Figure 6 is a schematic diagram of a computer program product according to an embodiment of the present invention; Figure 7 is a schematic diagram of a computer-readable storage medium according to an embodiment of the present invention; and Figure 8 is a schematic block diagram of a control device for an energy storage converter according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] Figure 1 Schematic diagram of an energy storage system according to an embodiment of the present invention. The energy storage system generally may include: power generation equipment 11, energy storage equipment 12, load equipment 13, energy storage converter 14, control device 15, energy storage cloud control platform 21.

[0031] The power generation equipment 11 can convert various energy sources into electrical energy, for example, it can be renewable energy power generation equipment such as solar photovoltaic panels and wind power generation equipment. Solar photovoltaic panels and wind power generation equipment use wind energy and solar energy to convert into electrical energy respectively, for example, they can include solar panels laid on the roof, small wind turbines, etc. In addition, the power generation equipment can also be other power generation equipment suitable for use in scenes such as homes, small parking lots, small buildings, etc., such as biomass power generation equipment.

[0032] The energy storage device 12 can use battery energy storage, mechanical energy storage, and thermal energy storage to help balance electricity supply and demand, improve grid stability, smooth intermittent output of renewable energy, provide backup power, and achieve efficient use of energy.

[0033] The load equipment 13 includes various electrical equipment, such as a heat pump system, a lighting system, an electric vehicle charging station, etc.

[0034] The energy storage converter 14 is used to convert the form of electrical energy, such as converting AC to DC. In some embodiments, the energy storage converter 14 may include an inverter, a charging and discharging component, etc., to realize the conversion of various forms of electrical energy between the power generation equipment 11, the energy storage equipment 12, the load equipment 13, and the external power grid 22.

[0035] The control device 15 is connected to the energy storage inverter 14 and is used to control the energy storage inverter 14. By adjusting the operating state of the energy storage inverter 14, the power supply direction of the power generation equipment 11, the charging and discharging state of the energy storage battery, and the charging and discharging power are adjusted and controlled.

[0036] The control device 15 can be arranged on the local side adjacent to the controlled device to control the energy storage converter 14 within the control range. For example, in a household distributed energy system, the control device 15 can be a control device set indoors, corresponding to the energy storage converter 14 set in the household. The control device 15 can control one or more energy storage converters 14 at the same time. In some embodiments, the control device 15 can be connected to the power generation equipment 11, the energy storage equipment 12, the load equipment 13, and the external energy storage converter 14 through a wired or wireless data communication interface.

[0037] The control device 15 can also directly or through a data acquisition device obtain the load data (power size, load forecast, load fluctuation, equipment status, operating mode, etc.) of the load device 13, the power generation data (power size, voltage, current, frequency, equipment status, operating mode, etc.) of the power generation equipment 11, the energy storage data (voltage, current, battery SOC, battery SOH, energy storage capacity, equipment status, charging and discharging status, etc.) of the energy storage device 12, the operating status of the energy storage converter 14 (power, current, voltage of AC and DC input and output, bus voltage, active power, reactive power, inverter frequency, direction of electric energy flow, etc.), and the real-time status of the external power grid 22 (voltage, current, direction of electric energy flow, power, etc.). The above-mentioned collected data, on the one hand, serves as energy storage operation data, as the control basis of the control device 15 and / or data provided to the energy storage cloud control platform 21, and on the other hand, data or information serving as the control basis of the energy storage converter 14 can be selected therefrom.

[0038] The energy storage cloud control platform 21 receives the energy storage operation data uploaded by the control device 15, and uses this data to realize remote monitoring, remote control, data analysis, and equipment management, and regulates the energy storage system within its control range to improve the overall efficiency of the system. The energy storage cloud control platform 21 can be used to manage and provide services for a certain number of control devices 15. That is, the energy storage cloud control platform 21 can manage multiple energy storage systems, provide remote services, and realize overall coordination of multiple energy storage systems.

[0039] The power management cloud platform 23 is used to manage the load devices 13. For example, it may include a heat pump management cloud platform for managing the heat pump system and a charging pile management cloud platform for managing the electric vehicle charging piles. The functions of the power management cloud platform 23 can be configured according to the type, working characteristics and functions of the load equipment to achieve remote monitoring, remote control, data analysis, equipment management, cost metering, fault diagnosis, equipment maintenance and other functions. In some embodiments, each type of load device 13 can transmit data to the corresponding power management cloud platform 23 and receive its remote control. The power management cloud platform 23 can manage and provide services for the load devices 13 for which it is responsible, and achieve overall coordination of multiple load devices 13.

[0040] This embodiment also provides a method for controlling an energy storage converter of an energy storage system. The method can be executed by the control device 15 to control the energy storage converter 14, thereby achieving the desired control target for the power generation equipment 11 and the energy storage equipment 12. Figure 2 is a schematic diagram of a method for controlling an energy storage converter of an energy storage system according to an embodiment of the present invention. The method for controlling an energy storage converter of an energy storage system may generally include:

[0041] Step S201, collect load data of load devices that use the electric energy of the energy storage system. These load data may include but are not limited to the type of load device, the device status of the load device, the operating mode of the load device, the power consumption, the load forecast data, and the load fluctuation data. One implementation method of this collection step is: using a data communication interface connected to the data of the load device to send a data read request to the load device; receiving the load data of the load device in response to the data read request through the data communication interface. The control device accesses the load device according to a predetermined request cycle (for example, 5s), and then obtains the load data. The access cycle of the control device can be configured according to the control requirements. At the same time, the load device can provide a communication interface that is compatible with the data communication interface of the control device, and provide control authority to the control device. In some embodiments, part of the collected data collected by the control device can also be obtained through other sensor devices connected to the load device.

[0042] Step S202, send a control instruction to the energy storage converter according to the load data, and the energy storage converter executes the control instruction so that the power generation equipment and energy storage equipment connected to the energy storage converter meet the power supply requirements of the energy storage system operation mode. The energy storage system operation mode may include: economic mode, green mode, fast charging mode, standby mode, etc. The above modes are configured for different control requirements to achieve their respective goals. For example, the green mode gives priority to the use of electricity generated by renewable energy to achieve energy conservation and emission reduction, and its power supply requirement is to use the electricity of power generation equipment and energy storage equipment as much as possible to meet the power demand of load equipment. The economic mode gives priority to the conditions of economic benefits and reduces energy consumption costs. Its power supply requirement is to avoid using grid electricity during the peak electricity price period of the grid as much as possible. The fast charging mode is used to realize the fast charging of electric vehicles, give priority to meeting the charging needs of electric vehicle users, and its power supply requirement is to meet the fast charging requirements of electric vehicles. The standby mode is used to maintain the power generation equipment and energy storage equipment as backup energy for the grid power, with sufficient reserve energy, and its power supply requires the equipment to be in a balanced state of reserve power.

[0043] Step S203, obtaining energy storage operation data after executing the control instruction, the energy storage operation data includes the operation status data of the energy storage converter, the power generation equipment, and the energy storage equipment. The energy storage operation data may include the operation status and operation data of all equipment of the energy storage system required by the power analysis platform.

[0044] Step S204, sending the energy storage operation data to the energy storage cloud control platform of the energy storage system. An optional execution process of this step is to integrate the energy storage operation data, generate a materialized energy data view using the integrated energy storage operation data, and synchronize the materialized energy data view to the energy storage cloud control platform.

[0045] The above-mentioned integration method for integrating the energy storage operation data may include: filtering out abnormal data (deleting obviously erroneous data), standardization processing (unification of data formats), adding descriptive information and statistical information. Through the above process, the quality of the energy storage operation data can be improved, which is convenient for the energy storage cloud control platform to parse and further analyze. Step S204 generates the integrated energy storage operation data into an atomized energy data view, and synchronizes it using data view synchronization. On the one hand, this data system method reduces the transmission of invalid data, improves the data security level, and helps to improve the data processing efficiency of the energy storage cloud control platform.

[0046] The process of generating a materialized energy data view using the integrated energy storage operation data may include: generating a data view of the integrated energy storage operation data according to a preset view definition; and materializing the data view to obtain a materialized energy data view. The preset view definition is set according to the data requirements of the energy storage cloud control platform. The data view can customize the data representation for the energy storage cloud control platform, which can represent a data query result. By selecting, combining and converting the data, it is convenient for the subsequent provision of the data, hides the actual storage structure of the data, and can provide the required data in a targeted manner.

[0047] Materialized Energy Data Views store or "materialize" predefined data views as schema objects for summarizing, calculating, replicating, and distributing data. Materialized Energy Data Views reduce query time by precalculating joins and aggregation operations and storing the results in a single dataset. Materialized Energy Data Views contain a full or partial copy of a dataset from a single point in time. Materialized Energy Data Views can also replicate data across distributed sites, synchronize updates performed across multiple sites, and synchronize across multiple platforms.

[0048] The generated materialized energy data view can be used for read-only operation, which can realize read-write separation and avoid the pollution of original data by the data requester. In addition, the materialized energy data view can be used for data replication, realize distributed storage of data, and reduce the data pressure of the platform.

[0049] In the method of the above embodiment, the control device of the energy storage inverter collects the load data of the load equipment that uses the electric energy of the energy storage system; the energy storage inverter is controlled according to the load data, and the control target is that the power generation equipment and energy storage equipment connected to the energy storage inverter meet the power supply requirements of the energy storage system operation mode, which has the characteristics of fast and efficient control of the local controller, and can meet the requirements of the operation mode, and realize the overall efficient operation of multiple energy storage systems. During the control process, the operating status data of the energy storage inverter, the power generation equipment, and the energy storage equipment are sent to the energy storage cloud control platform of the energy storage system through the local controller, which provides a data basis for the further development and utilization of the data of the energy storage system, reduces the communication transmission pressure of the energy storage cloud control platform, and reduces the complexity of system control.

[0050] On the basis of the energy storage operation data uploaded by the control device, the energy storage cloud control platform can also determine the mode adjustment instruction according to the operation data uploaded by the control device of the energy storage converter, and determine the operation mode of the energy storage system by means of big data and the data processing capability of the cloud platform, and provide control guidance for the control device of the energy storage converter, clarify the control target, avoid the control device being limited to local device control, and realize the coordinated control of different energy storage systems. For example, in some embodiments, after the step of sending the operation data to the energy storage cloud control platform of the energy storage system, it also includes: obtaining the mode adjustment instruction determined by the energy storage cloud control platform according to the operation data; and re-determining the operation mode of the energy storage system according to the mode adjustment instruction.

[0051] When the energy storage system is operated in economic mode, the power supply requirement is that the overall operating cost of the power generation equipment and the energy storage equipment within the set operating cycle is the lowest. Figure 3 : is a control flow chart of an economic mode of an energy storage converter control method according to an embodiment of the present invention. The control flow of the economic mode may include:

[0052] Step S301 , judging whether there is surplus electric energy in the power generation equipment according to the power supply threshold of the power generation equipment.

[0053] Step S302: If there is surplus power in the power generation equipment, the surplus power of the power generation equipment is used to charge the energy storage device. The power supply threshold of the power generation equipment is used to identify the proportion of power remaining when the power generation equipment meets the power demand of the energy storage device. If it is greater than the power supply threshold of the power generation equipment, it can be considered that the power generation equipment can charge the energy storage system. For example, the current total power generation power of the power generation equipment is Ptotal, and the power supplied to the power consumption equipment is Puse. If (Ptotal-Puse) / Ptotal is greater than or equal to the power supply threshold of the power generation equipment Pthreshold, it is considered that there is surplus power.

[0054] Step S303, determining whether the energy storage battery is fully charged. For example, if the SOC of the energy storage battery is greater than a full charge threshold, it is considered that the energy storage battery is fully charged.

[0055] Step S304: If the battery is fully charged, the remaining power of the power generation equipment is used to supply power to the load equipment.

[0056] Step S305: when there is no surplus electric energy in the power generation equipment, determine whether the current time is in the peak electricity price period.

[0057] Step S306: during the peak electricity price period, judging whether the energy storage device has surplus electric energy according to the power supply threshold of the energy storage device.

[0058] Step S307: If the energy storage device has surplus power, the energy storage device is controlled to discharge to supply power to the load device; the energy storage device power supply threshold is used to identify the SOC of the energy storage device, that is, when the SOC of the energy storage device is greater than the energy storage device power supply threshold, it is considered whether the energy storage device has surplus power to supply power to the outside. The energy storage device power supply threshold is generally less than the energy storage battery full threshold.

[0059] Step S308: If the energy storage device does not have any remaining electric energy, the load device is requested to reduce the electric energy consumption.

[0060] Step S309: During the period of low electricity prices, grid electricity is introduced to charge the energy storage system and supply power to the load.

[0061] The above economic model fully utilizes the surplus power of power generation equipment and the power of energy storage equipment, minimizes the introduction of power grid power during peak electricity price periods, and increases user benefits. In addition, the above economic model fully considers the power supply capacity of power generation equipment and energy storage equipment, and avoids the impact and fluctuation of frequent adjustment of equipment status on power generation equipment, load equipment, and power grid.

[0062] As an alternative embodiment, the control process of the above economic mode may also include: obtaining the load forecast curve of the load equipment in the next set operation cycle, obtaining the power generation forecast curve of the power generation equipment in the next set operation cycle, matching the load forecast curve with the power generation forecast curve, and determining the power imbalance curve in the next set operation cycle, the power imbalance curve reflects the difference between the supply and demand power at each moment in the next set operation cycle. According to the power imbalance curve, the current power state of the energy storage device, and the power price information of the power grid at different moments in the next set operation cycle, the lowest overall operating cost is determined, that is, the operating mode with the lowest cost of obtaining power from the power grid.

[0063] When the energy storage system operates in green mode, the power supply requirement is that the power generation equipment and the energy storage equipment supply power to the load equipment at a power corresponding to the load data. Figure 4 : is a control flow chart of the green mode of the energy storage converter control method according to an embodiment of the present invention. The control flow of the green mode may include:

[0064] Step S401, the power generation equipment supplies power to the load equipment; Step S402, determining whether the power generation equipment has surplus electric energy; the determination method can still be implemented by comparing with the power supply threshold of the power generation equipment; Step S403, if the power generation device does not have surplus electric energy, then determine whether the energy storage device has surplus electric energy, and the determination method can still be implemented by comparing with the power supply threshold of the energy storage device; Step S404: if the energy storage device has surplus electric energy, the energy storage device discharges to supply power to the load device; Step S405: If the energy storage device does not have surplus electric energy, request the load device to reduce electric energy consumption; Step S406, if the power generation device still has remaining power, determine whether the energy storage device is fully charged, that is, whether the SOC of the energy storage device is greater than a set full threshold; Step S407, if the energy storage device is fully charged, the power generation device feeds back electric energy to the power grid; Step S408: the power generation device charges the energy storage device.

[0065] Using the above steps, the green mode gives priority to the use of electricity generated by renewable energy to achieve energy conservation and emission reduction. Its power supply requirement is to use the electricity of power generation equipment and energy storage equipment as much as possible to meet the power demand of load equipment.

[0066] The above economic mode and green mode are examples. Based on this technology, those skilled in the art can configure other operating modes according to the different needs of the energy storage system and the operating efficiency of the entire power system, such as fast charging mode, standby mode, etc. The adjustment details of each operating mode can also be updated by the energy storage cloud control platform according to the feedback of the operating conditions to achieve optimization.

[0067] After the step of collecting load data of load devices that use the electric energy of the energy storage system, the method of this embodiment may also include: matching the load data with the power supply capacity corresponding to the operation mode of the energy storage system; if not, sending a load adjustment request to the load device, and the load device determines whether to respond to the load adjustment request. The step of the load device determining whether to respond to the load adjustment request includes: obtaining the operation target of the load device, the operation target is issued by the power management cloud platform connected to the load device data; judging whether the load device after responding to the load adjustment request meets the conditions for achieving the operation target; if so, the load device determines to respond to the load adjustment request.

[0068] When it is determined that the load device cannot meet the conditions for achieving the operating target after responding to the load adjustment request, an operating target adjustment request can be further sent to the power management cloud platform; if the power management cloud platform's reply to the operating target adjustment request indicates that adjustment is allowed, the operating target is adjusted, and the load device determines to respond to the load adjustment request; if the power management cloud platform's reply to the operating target adjustment request indicates that adjustment is not allowed or the power management cloud platform's reply to the operating target adjustment request is not received, the load device determines not to respond to the load adjustment request.

[0069] Figure 51 is a schematic diagram of adjusting the operating state of a load device in a method for controlling an energy storage converter of an energy storage system according to an embodiment of the present invention. The process may include: Step S501, matching the load data with the power supply capacity corresponding to the operation mode of the energy storage system, that is, determining whether the power supply capacity corresponding to the operation mode of the energy storage system is sufficient to meet the power demand of the load equipment. For example, for the economic mode, the energy storage system can determine the power supply capacity that can be provided at the minimum economic cost; for another example, for the green mode, the energy storage system can determine the maximum power supply capacity that the current power generation equipment and energy storage equipment can provide.

[0070] Step S502: If there is no match, a load adjustment request is sent to the load device. The load adjustment request at least includes: the degree of decrease in the power consumption of the load device or the expected power consumption of the load device. The load adjustment request reflects the gap between the power supply capacity of the current energy storage system and the load demand of the load device.

[0071] Step S503, the load device obtains the operation target, which is issued by the power management cloud platform connected to the load device data. For example, for the charging load of an electric vehicle, the operation target may include the charging target of the electric vehicle (charging power size, charging time requirements, etc.); for the thermal energy load of a heat pump, the operation target may include the heat exchange target of the heat pump (such as target temperature, temperature change speed requirements, etc.). The realization of the above operation targets is directly related to the consumed electrical energy, so the power load can be adjusted by adjusting the operation target of the load device.

[0072] Step S504: determine whether the load device responding to the load adjustment request meets the conditions for achieving the operation target. The load device can make a specific determination based on the power consumption required for the operation target.

[0073] Step S505: If it is determined that the load device after responding to the load adjustment request can meet the conditions for achieving the operation target, the load device determines to respond to the load adjustment request. That is, if the load device can still achieve the operation target according to the degree of reduction of the power consumption requested by the load adjustment or the expected power consumption of the load device, the load device automatically reduces the power consumption. In this case, the operation target of the load device remains unchanged.

[0074] Step S506: If it is determined that the load device responding to the load adjustment request cannot meet the conditions for achieving the operation target, the load device sends an operation target adjustment request to the power management cloud platform. Since the load device's own adjustment of the operation target may also affect the operation of other related devices, such as multiple heat pump devices that provide heating / cooling for the same building, the load device needs to request the power management cloud platform that manages the load devices of the entire system to adjust the operation target.

[0075] Step S507, determine whether the power management cloud platform's response to the operation target adjustment request indicates that the adjustment is allowed. The power management cloud platform can determine whether the operation target adjustment is allowed based on the operation status of other load devices related to the current load device and the negative power device itself.

[0076] Step S508: If the adjustment is not allowed, the information indicating that the adjustment is not allowed is fed back to the control device. If the adjustment is allowed, the load device determines to respond to the load adjustment request.

[0077] The adjustment of the above-mentioned load devices is determined by the load devices and their respective power management cloud platforms, and the control objectives of the energy storage inverter are achieved by means of the original data connection method of the load devices, which is convenient for expansion and updating.

[0078] The control device can also perform the following processing on the energy storage operation data to facilitate data synchronization and subsequent processing of the energy storage cloud control platform: filter out abnormal data according to preset data filtering rules to obtain qualified data; standardize the qualified data according to the preset data format; add descriptive information and statistical information to the standardized data to obtain integrated energy storage operation data.

[0079] The above data filtering rules can be defined based on preset logical conditions, such as numerical range, text matching, timestamp, data format, etc., to ensure the accuracy and relevance of the data. The numerical range can be configured according to the normal size of the data information. If it exceeds the set threshold, it is considered abnormal. For example, in the case where the current data and voltage data obviously exceed the rated maximum limit, the abnormal data can be directly determined. Text matching can use string matching, regular expression matching, etc. to filter out irrelevant data. Timestamps can be used to filter out data that has been processed or expired. The data format can verify whether the format of the data is correct, for example, the format of the date data is not the date format, the format of the time data is not the time format, the device coding does not comply with the coding rules, etc.

[0080] Furthermore, in some embodiments, composite logic filtering can be performed, such as combining energy storage operation data with power data and time data for logical judgment. For example, if the device operation status is shutdown but power consumption still occurs, the data is considered abnormal. For another example, if photovoltaic power generation data appears during the night time period when there is no sunlight, the data is considered abnormal.

[0081] By filtering out abnormal data through the above data filtering rules, the data quality of energy storage operation data can be improved.

[0082] Standardization of qualified data can form a unified, consistent, high-quality data set, such as unified data dimensions, unified protocols, unified coding methods, etc. The conversion process can convert data into a unified format and structure, including data type conversion, data normalization, data aggregation, etc.

[0083] Adding descriptive information and statistical information to the standardized data can help enhance the interpretability of the data. Such descriptive information may include: the time, source, collection method, transmission method of data collection, data standardization parameters, data version number, etc. The statistical information of the data includes but is not limited to information reflecting the concentration trend, degree of dispersion, change trend, and value range of the data set.

[0084] The process of generating a materialized energy data view may include: generating a data view according to a preset view definition; materializing the data view to obtain a materialized energy data view. The preset view definition is set according to the data requirements of the data requester. The data view can customize the data representation for the data requester, which can represent a data query result. By selecting, combining and converting the data, it is convenient for the subsequent provision of the data, hides the actual storage structure of the data, and can provide the required data in a targeted manner.

[0085] The step of materializing the data view may include: encrypting the data view and configuring access rights; synchronizing the encrypted data view on the distributed storage nodes, thereby storing the materialized energy data view on the distributed storage nodes.

[0086] Materialized views are predefined views of data that are stored or "materialized" in advance as schema objects for summarizing, calculating, replicating, and distributing data. Materialized views reduce query time by pre-calculating joins and aggregation operations and storing the results in a single data set. Materialized views contain a complete or partial copy of a data set from a single point in time. Materialized views also replicate data across distributed sites and synchronize updates performed on multiple cloud nodes.

[0087] The generated materialized energy data view can be used for read-only operation, which can realize read-write separation and avoid the pollution of original data by the data requester. In addition, the materialized energy data view can be used for data replication, realize distributed storage of data, and reduce the data pressure of the platform.

[0088] In some embodiments, after the step of generating a data view of the integrated energy storage operation data according to the preset view definition, the data in the data view can also be desensitized to avoid leakage of sensitive data. In the process of data desensitization, the original sensitive data is replaced or modified, but the original format and characteristics of the data are retained to ensure the functional availability of the data. In this way, even if the data is improperly accessed, the attacker cannot obtain the real sensitive information. User information, address information, and financial information in energy data can all be prevented from leakage through desensitization.

[0089] The process of the energy storage cloud control platform determining the mode adjustment instruction according to the materialized energy data view may include: the energy storage cloud control platform queries the materialized energy data view to obtain the data required for the mode adjustment instruction generation, such as querying the values ​​of voltage, current, power and their statistical values ​​within a specific time period, matching the data according to the instruction generation logic or using the above data as the input of the instruction matching model, thereby obtaining the corresponding mode adjustment instruction.

[0090] This embodiment also provides a computer program product 112 , a computer-readable storage medium 113 , and a photovoltaic power station design device 30 . Figure 6 is a schematic diagram of a computer program product 112 according to one embodiment of the present invention, Figure 7 is a schematic diagram of a computer-readable storage medium 113 according to an embodiment of the present invention, Figure 8 is a schematic block diagram of a control device 15 for an energy storage converter according to an embodiment of the present invention.

[0091] The computer program product 112 includes a computer program 111, which implements the steps of any of the above-mentioned energy storage converter control methods for energy storage systems when the computer program 111 is executed by the processor 310. The computer-readable storage medium 113 stores the above-mentioned computer program 111, which implements the steps of any of the above-mentioned energy storage converter control methods for energy storage systems when the computer program 111 is executed by the processor 310. The control device 15 of the energy storage converter may include a memory 320, a processor 310, and a computer program 111 stored in the memory 320 and running on the processor 310.

[0092] The computer program 111 used to perform the operations of the present invention may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, configuration data for an integrated circuit, or source code or object code written in any combination of one or more programming languages ​​and procedural programming languages.

[0093] The computer program 111 may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the latter case, the remote computer may be connected to the user's computer via any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet Service Provider). In some embodiments, to perform various aspects of the present invention, electronic circuits including, for example, programmable logic circuits, Field-Programmable Gate Arrays (FPGAs), or Programmable Logic Arrays (PLAs) may execute computer-readable program instructions by utilizing state information of the computer-readable program instructions to personalize the electronic circuits.

[0094] In the description of this embodiment, the computer program product 112 is a related product including the computer program 111 .

[0095] For the purpose of the description of the present embodiment, the computer readable storage medium 113 is a tangible device capable of retaining and storing the computer program 111, which may be any device that can contain, store, communicate, propagate or transmit the program 111 for use with or in conjunction with an instruction execution system, device or apparatus. More specific examples (a non-exhaustive list) of the computer readable storage medium 113 include the following: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, and any suitable combination of the above.

[0096] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. A method for controlling an energy storage converter of an energy storage system, characterized in that include: Collecting load data of load devices that use the electrical energy of the energy storage system; Sending a control instruction to the energy storage converter according to the load data, and having the energy storage converter execute the control instruction so that the power generation equipment and the energy storage equipment connected to the energy storage converter meet the power supply requirements of the energy storage system operation mode; Acquire energy storage operation data after executing the control instruction, wherein the energy storage operation data includes operation status data of the energy storage converter, the power generation equipment, and the energy storage equipment; Integrating the energy storage operation data, and generating a materialized energy data view using the integrated energy storage operation data; The materialized energy data view is synchronized to the energy storage cloud control platform.

2. The energy storage converter control method of the energy storage system according to claim 1, wherein: After the step of synchronizing the materialized energy data view to the energy storage cloud control platform, the step further includes: Obtaining a mode adjustment instruction determined by the energy storage cloud control platform according to the materialized energy data view; The energy storage system operation mode is re-determined according to the mode adjustment instruction.

3. The energy storage converter control method of the energy storage system according to claim 2, wherein: The energy storage system operation mode includes a green mode, and In the green mode, the power supply requirement is that the power generation device and the energy storage device supply power to the load device with the power corresponding to the load data.

4. The energy storage converter control method of the energy storage system according to claim 2, wherein: The energy storage system operation mode includes an economic mode, and In the economic mode, the power supply requirement is that the overall operating cost of the power generation equipment and the energy storage equipment within a set operating cycle is the lowest.

5. The energy storage converter control method of the energy storage system according to claim 1, wherein: The step of collecting load data of load equipment using the electric energy of the energy storage system comprises: Sending a data reading request to the load device using a data communication interface that is data-connected to the load device; The load data from the load device in response to the data read request is received through the data communication interface.

6. The energy storage converter control method of the energy storage system according to claim 5, wherein: After the step of collecting load data of load devices using the electric energy of the energy storage system, the method further includes: Matching the load data with the power supply capacity corresponding to the operation mode of the energy storage system; If there is no match, a load adjustment request is sent to the load device, and the load device determines whether to respond to the load adjustment request.

7. The energy storage converter control method of the energy storage system according to claim 6, wherein: The step of the load device determining whether to respond to the load adjustment request comprises: Obtaining the operation target of the load device, where the operation target is issued by a power management cloud platform connected to the data of the load device; Determining whether the load device, after responding to the load adjustment request, meets the condition for achieving the operation target; If so, the load device determines to respond to the load adjustment request.

8. The energy storage converter control method of the energy storage system according to claim 7, wherein: When it is determined that the load device cannot meet the condition for achieving the operation target after responding to the load adjustment request, sending an operation target adjustment request to the power management cloud platform; If the power consumption management cloud platform responds to the operation target adjustment request and indicates that adjustment is allowed, the operation target is adjusted, and the load device determines to respond to the load adjustment request; If the reply of the power consumption management cloud platform in response to the operation target adjustment request indicates that adjustment is not allowed or the reply of the power consumption management cloud platform in response to the operation target adjustment request is not received, the load device determines not to respond to the load adjustment request.

9. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the energy storage converter control method of the energy storage system according to any one of claims 1 to 8 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that When the computer program is executed by a processor, the steps of the energy storage converter control method of the energy storage system according to any one of claims 1 to 8 are implemented.

11. A control device for an energy storage converter, comprising a memory, a processor and a computer program stored in the memory, characterized in that: The processor executes the computer program to implement the steps of the energy storage converter control method of the energy storage system according to any one of claims 1 to 8.

12. An energy storage system, characterized in that include: Power generation equipment; Energy storage equipment; Load equipment; an energy storage converter, connected to the power generation device and the energy storage device respectively, and configured to convert the form of electric energy; The control device of the energy storage converter according to claim 11; The energy storage cloud control platform is communicatively connected with the control device.

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