Photovoltaic and energy storage integrated electrical system and metering method

Abstract

This invention provides an integrated photovoltaic-storage electrical system and metering method, belonging to the field of electrical engineering technology. The system includes: an energy storage power station, a photovoltaic power station, a station service transformer, and a PT cabinet connected to the same medium-voltage busbar; the power generated by the photovoltaic power station is stored in the energy storage power station through the medium-voltage busbar; the station service transformer is used to drive the power consumption schemes of the energy storage power station and the photovoltaic power station; the power consumption of each device in the integrated photovoltaic-storage electrical system is supplied by the energy storage power station; the PT cabinet is used to protect the medium-voltage busbar and to perform power metering on the medium-voltage busbar. This invention combines the primary and secondary equipment of two original systems into one set, and also merges the station service transformer, reducing power station investment to a certain extent; at the same time, by reasonably setting the metering meters, it avoids the problem of not being able to distinguish between photovoltaic power generation and energy storage system charging and discharging after the system is merged.

Description

Technical Field

[0001] This invention relates to the field of electrical engineering technology, specifically to an integrated photovoltaic and energy storage electrical system and a metering method for such an integrated system. Background Technology

[0002] With the rapid development of the new energy industry, existing enterprises are building distributed photovoltaic (PV) power stations using their own factory rooftops, vacant land, or circulating water pools, leading to a rapid increase in PV power generation coverage. Cement companies, in particular, are common examples due to their large factory areas and abundant idle rooftops and land. With the development of energy storage technology, most companies have proposed research plans for simultaneously configuring energy storage systems for new energy PV and wind power generation. However, due to the current high cost of energy storage per kilowatt-hour and low power station utilization, energy storage configuration in cement companies is still in its initial stage, and its development depends on further reductions in battery costs and a widening of electricity price differences. Currently, PV and energy storage power stations in cement plants are built independently. Some companies that initially built PV power stations are now required by policy to add a certain scale of energy storage power stations, resulting in large investments and poor returns. To address the significant investment-return gap in existing PV and energy storage power station construction, an integrated PV-energy storage electrical system is needed. Summary of the Invention

[0003] The purpose of this invention is to provide an integrated photovoltaic and energy storage electrical system and metering method to at least solve the problem of excessively large investment return gap in the construction of existing photovoltaic power plants and energy storage power plants.

[0004] To achieve the above objectives, the first aspect of the present invention provides an integrated photovoltaic and energy storage electrical system for the integrated operation of a photovoltaic power station and an energy storage power station. The system includes: an energy storage power station, a photovoltaic power station, a station service transformer, and a PT cabinet connected to the same medium-voltage busbar; the power generated by the photovoltaic power station is stored in the energy storage power station through the medium-voltage busbar; the station service transformer is used to drive the power consumption schemes of the energy storage power station and the photovoltaic power station; the power consumption of each device in the integrated photovoltaic and energy storage electrical system is supplied by the energy storage power station; the PT cabinet is used to protect the medium-voltage busbar and to perform power metering on the medium-voltage busbar.

[0005] Optionally, the energy storage power station is connected to the medium-voltage busbar via an energy storage incoming line cabinet.

[0006] Optionally, the photovoltaic power station is connected to the medium-voltage busbar via a photovoltaic incoming line cabinet.

[0007] Optionally, the PT cabinet is connected to the grid-connected cabinet through a metering cabinet and an outgoing line cabinet.

[0008] Optionally, the system further includes multiple energy meters for measuring energy consumption at corresponding locations, including: a first meter between the energy storage power station and the medium-voltage busbar; a second meter between the photovoltaic power station and the medium-voltage busbar; a third meter between the station service transformer and the medium-voltage busbar; a fourth meter between the station service transformer and the energy storage power station; a fifth meter between the station service transformer and the photovoltaic power station; and a sixth meter between the PT cabinet and the metering cabinet.

[0009] Optionally, the first meter and the sixth meter are bidirectional meters, while the second to fifth meters are unidirectional meters.

[0010] A second aspect of the present invention provides a metering method for an integrated photovoltaic and energy storage electrical system, applied to the aforementioned integrated photovoltaic and energy storage electrical system. The method includes: acquiring metering information from a first meter to a sixth meter in real time; responding to a user trigger signal and identifying user demand information based on the user trigger signal; calculating the demand information based on the metering information from the first meter to the sixth meter and obtaining the demand information calculation result; and pushing the demand information calculation result to the user terminal.

[0011] Optionally, the user's demand information includes: energy storage power station charging capacity, energy storage power station discharging capacity, photovoltaic power station power generation, power consumption of station substation, power consumption of energy storage power station, power consumption of photovoltaic power station, power generation of integrated photovoltaic and energy storage electrical system, power consumption of integrated photovoltaic and energy storage electrical system, photovoltaic power station power generation based on photovoltaic power station system efficiency, the amount of photovoltaic power generation stored in the energy storage power station, charging capacity based on energy storage power station system cycle efficiency, and discharging capacity based on energy storage power station system cycle efficiency.

[0012] Optionally, the charging and discharging amounts of the energy storage power station are directly obtained from the first meter; the power generation of the photovoltaic power station is directly obtained from the second meter; the power consumption of the station substation is directly obtained from the third meter; the power consumption of the energy storage power station is directly obtained from the fourth meter; the power consumption of the photovoltaic power station is directly obtained from the fifth meter; the power generation and power consumption of the integrated photovoltaic-energy storage electrical system are directly obtained from the sixth meter; the photovoltaic power station system efficiency (the photovoltaic power generation) is obtained from the metering information of the second and fifth meters, and the calculation rule is as follows:

[0013] P1 = PJ2 - PJ5

[0014] Wherein, P1 represents the photovoltaic power generation of the photovoltaic power station system efficiency; PJ2 represents the metering information of the second meter; PJ5 represents the metering information of the fifth meter; the amount of electricity generated by the photovoltaic power station and stored in the energy storage station is obtained from the metering information of the first meter, the third meter, and the fourth meter, and the calculation rule is as follows:

[0015] P2 = PJ 1正 +PJ3-PJ 6正

[0016] Where P2 represents the amount of electricity generated by the photovoltaic power station that is stored in the energy storage power station; PJ 1正 PJ1 represents the positive measurement information from the first measuring instrument; PJ2 represents the measurement information from the third measuring instrument; PJ... 6正 The positive metering information is from the sixth meter; the charging amount for the cycle efficiency of the energy storage power station system is obtained from the metering information of the first meter and the metering information of the fourth meter, and the calculation rule is as follows:

[0017] P3 = PJ 1正 +PJ4

[0018] Wherein, P3 represents the charging amount of the energy storage power station system's cycle efficiency; PJ4 represents the metering information from the fourth meter; the discharging amount of the energy storage power station system's cycle efficiency is obtained from the metering information from the first meter and the metering information from the fourth meter, and the calculation rule is as follows:

[0019] P4 = PJ 1反 -PJ4

[0020] Where P4 is the discharge quantity of the energy storage power station system's cycle efficiency; PJ 1反 This is the reverse measurement information of the first meter.

[0021] On the other hand, the present invention provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the above-described metering method for an integrated photovoltaic and energy storage electrical system.

[0022] Through the above technical solution, the present invention combines the design of the photovoltaic power station and the energy storage power station of the cement plant according to the simultaneous planning. After the combination, the primary and secondary equipment of the two systems can be combined into one set, and the station transformer can be combined, which reduces the investment of the power station to a certain extent. At the same time, by reasonably setting the metering meters, the problem of not being able to distinguish between the photovoltaic power generation and the charging and discharging of the energy storage system after the system is combined is avoided.

[0023] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is a system structure diagram of an integrated photovoltaic and energy storage electrical system provided in one embodiment of the present invention;

[0026] Figure 2 This is a flowchart of the metering method for an integrated photovoltaic and energy storage electrical system provided in one embodiment of the present invention.

[0027] Explanation of reference numerals in the attached figures

[0028] 10 - First measuring table; 20 - Second measuring table; 30 - Third measuring table; 40 - Fourth measuring table; 50 - Fifth measuring table; 60 - Sixth measuring table. Detailed Implementation

[0029] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0030] With the rapid development of the new energy industry, existing enterprises are building distributed photovoltaic power stations using their own factory rooftops, vacant land, or circulating water pools, resulting in a rapid increase in the photovoltaic power generation coverage rate of enterprises. Cement enterprises, in particular, have large factory areas and a lot of idle rooftops and vacant land, making the construction of photovoltaic power stations within their factory areas very common.

[0031] With the rapid development of new energy sources in the cement industry, user-side energy storage has begun to attract the attention of cement industry entrepreneurs. On the one hand, the cement industry itself is a high-energy-consuming enterprise with large electricity demand, and power departments or governments may impose power rationing on enterprises due to power supply shortages or environmental protection requirements. On the other hand, with the encouragement of domestic electricity pricing policies, the peak-valley electricity price difference has further widened, which has significantly improved the economic benefits of user-side energy storage. Based on the above considerations, cement enterprises can configure energy storage systems to effectively avoid the risk of production stoppages caused by power rationing by adjusting production, and can also earn certain profits by taking advantage of the peak-valley price difference.

[0032] With the development of energy storage technology, most companies have proposed research plans for the simultaneous configuration of energy storage systems for new energy photovoltaic and wind power generation. However, due to the current high cost per kilowatt-hour of energy storage and low power plant utilization, the energy storage configuration of cement companies is still in its initial stage. Its development depends on further reductions in battery costs and a further widening of the electricity price gap. Currently, photovoltaic power plants and energy storage power plants in cement plants are constructed independently. Some companies built photovoltaic power plants initially, but now, due to policy requirements, they are required to add a certain scale of energy storage power plants, resulting in large investments and poor returns.

[0033] To address the significant gap in investment returns between existing photovoltaic (PV) and energy storage power plant construction, this invention presents an integrated PV-energy storage electrical system for the combined operation of both systems. Designed for simultaneous planning of a cement plant's PV and energy storage power plants, this invention merges the two systems into a single unit. This integration allows for the consolidation of primary and secondary equipment from the original two systems into a single system, along with the merging of the station's power transformer, thereby reducing overall power plant investment. Furthermore, by strategically configuring metering, the invention avoids the inability to distinguish between PV power generation and energy storage system charging / discharging volumes after system merging.

[0034] Figure 1 This is a system structure diagram of an integrated photovoltaic and energy storage electrical system provided in one embodiment of the present invention. Figure 1 As shown, this invention provides an integrated photovoltaic-storage electrical system, comprising: an energy storage power station, a photovoltaic power station, a station service transformer, and a PT cabinet connected to the same medium-voltage busbar; the power generated by the photovoltaic power station is stored in the energy storage power station through the medium-voltage busbar; the station service transformer is used to drive the power consumption schemes of the energy storage power station and the photovoltaic power station; the power consumption of each device in the integrated photovoltaic-storage electrical system is supplied by the energy storage power station; the PT cabinet is used to protect the medium-voltage busbar and to perform power metering on the medium-voltage busbar.

[0035] In this embodiment of the invention, the purpose of the solution is to achieve direct integration of photovoltaic power plants and energy storage power plants, reducing the need for synchronization equipment after separate setup. If the two systems are built separately, subsequent integration requires equipment replacement or supplementation for both the station substation and the corresponding energy storage solution, as the initial capacity considerations did not take integration into account, resulting in excessive equipment investment. However, in the integrated photovoltaic-energy storage electrical system of this invention, the entire system has only one grid-connected terminal, and all power consumption within the system is driven by a single station substation. The photovoltaic power plant's power generation is not considered in the grid-connected equipment setup; all generated power is directly stored in the energy storage power plant. Only when the entire system cannot store excess power is the power transmitted directly to the grid through a single port. This port also supplements the energy storage power plant's power supply through the mains grid when the photovoltaic power plant's power supply is insufficient.

[0036] The above technical solution ensures that the entire energy storage power station remains in a floating charging state, which is significant for the overall lifespan of the power station. Furthermore, the entire system has only one grid-connected terminal and one power-consuming drive device, solving the problem of the increased equipment costs associated with setting up two separate systems.

[0037] Preferably, the energy storage power station is connected to the medium-voltage busbar via an energy storage grid connection cabinet.

[0038] Preferably, the photovoltaic power station is connected to the medium-voltage busbar via a photovoltaic incoming line cabinet.

[0039] In this embodiment of the invention, the solution is applicable to photovoltaic and energy storage grid-connected systems with voltage levels of 6kV or 10kV. Therefore, it is necessary to connect the energy storage power station and the photovoltaic power station to a medium-voltage busbar. In order to ensure the safety of power consumption and transmission of the system, corresponding switchgear needs to be set up between the photovoltaic power station and the energy storage power station and the medium-voltage busbar to ensure the convenience and safety of the entire system control.

[0040] Preferably, the PT cabinet is connected to the grid-connected cabinet through a metering cabinet and an outgoing line cabinet.

[0041] In this embodiment of the invention, as previously known, the integrated photovoltaic and energy storage system proposed in this invention ensures that the entire system only requires one grid-connected terminal. This invention prioritizes storing the power generated by the photovoltaic power station in the energy storage system before uploading any excess power to the grid. Therefore, the corresponding metering cabinet and outgoing line cabinet are connected to the PT cabinet for grid connection, performing grid-connected power transmission on one hand, and statistical analysis of uploaded and acquired power on the other.

[0042] Preferably, the system further includes multiple power meters for measuring power consumption at corresponding locations, including: a first meter 10 between the energy storage power station and the medium-voltage busbar; a second meter 20 between the photovoltaic power station and the medium-voltage busbar; a third meter 30 between the station service transformer and the medium-voltage busbar; a fourth meter 40 between the station service transformer and the energy storage power station; a fifth meter 50 between the station service transformer and the photovoltaic power station; and a sixth meter 60 between the PT cabinet and the metering cabinet.

[0043] In this embodiment of the invention, to ensure monitoring of the power consumption and generation of the entire system, the solution incorporates power meters at multiple nodes within the system, guaranteeing comprehensive monitoring of operational parameters throughout the system's operation and maintenance process. Furthermore, subsequent monitoring personnel can not only use these meters to monitor corresponding system operating parameters but also promptly identify potential system problems.

[0044] Furthermore, the monitoring objects for the electricity consumption or power generation of the present invention include the charging amount of the energy storage power station, the discharging amount of the energy storage power station, the power generation of the photovoltaic power station, the electricity consumption of the station's transformer cabinet, the electricity consumption of the energy storage power station, the electricity consumption of the photovoltaic power station, the power generation of the integrated photovoltaic and energy storage electrical system, the electricity consumption of the integrated photovoltaic and energy storage electrical system, the photovoltaic power generation of the photovoltaic power station system efficiency, the amount of electricity generated by the photovoltaic power station stored in the energy storage power station, the charging amount of the energy storage power station system cycle efficiency, and the discharging amount of the energy storage power station system cycle efficiency.

[0045] Furthermore, the power generation of the photovoltaic power station is directly obtained from the second meter 20; the power consumption of the station transformer is directly obtained from the third meter 30; the power consumption of the energy storage power station is directly obtained from the fourth meter 40; the power consumption of the photovoltaic power station is directly obtained from the fifth meter 50; the power generation and power consumption of the integrated photovoltaic and energy storage electrical system are directly obtained from the sixth meter 60; the photovoltaic power station system efficiency is obtained from the metering information of the second meter 20 and the metering information of the fifth meter 50, and the calculation rule is as follows:

[0046] P1 = PJ2 - PJ5

[0047] Wherein, P1 represents the photovoltaic power generation of the photovoltaic power station system efficiency; PJ2 represents the metering information of the second meter 20; PJ5 represents the metering information of the fifth meter 50; the amount of electricity generated by the photovoltaic power station and stored in the energy storage station is obtained from the metering information of the first meter 10, the third meter 30, and the fourth meter 40, and the calculation rule is as follows:

[0048] P2 = PJ 1正 +PJ3-PJ 6正

[0049] Where P2 represents the amount of electricity generated by the photovoltaic power station that is stored in the energy storage power station; PJ 1正 PJ3 represents positive measurement information from the first meter 10; PJ3 represents measurement information from the third meter 30; PJ 6正 The sixth meter 60 provides positive metering information; the charging amount for the cycle efficiency of the energy storage power station system is obtained from the metering information of the first meter 10 and the fourth meter 40, and the calculation rule is as follows:

[0050] P3 = PJ 1正 +PJ4

[0051] Wherein, P3 represents the charging amount of the energy storage power station system's cycle efficiency; PJ4 represents the metering information from the fourth meter 40; the discharging amount of the energy storage power station system's cycle efficiency is obtained from the metering information from the first meter 10 and the metering information from the fourth meter 40, and the calculation rule is as follows:

[0052] P4 = PJ 1反 -PJ4

[0053] Where P4 is the discharge quantity of the energy storage power station system's cycle efficiency; PJ 1反 This is the reverse measurement information for the first meter 10.

[0054] Preferably, the first meter 10 and the sixth meter 60 are bidirectional meters, and the remaining meters are unidirectional meters.

[0055] In this embodiment of the invention, since the entire system's power consumption comes from the energy storage power station, the energy storage power station operates in two states: charging and discharging. To monitor these two states, the present invention installs a bidirectional meter between the energy storage power station and the medium-voltage busbar, which can simultaneously collect charging and discharging power. Similarly, to monitor the system's power consumption from the mains grid and the surplus power fed into the grid, the present invention also installs a sixth meter 60, which is a bidirectional meter, between the PT cabinet and the metering cabinet.

[0056] Figure 2 This is a flowchart of a metering method for an integrated photovoltaic and energy storage electrical system according to one embodiment of the present invention. Figure 2 As shown, an embodiment of the present invention provides a metering method for an integrated photovoltaic and energy storage electrical system, the method comprising:

[0057] Step S10: Obtain metering information from each electricity meter in real time.

[0058] Step S20: In response to the user trigger signal, identify the user's demand information based on the user trigger signal.

[0059] Specifically, users often need to query target parameters based on their actual needs. Since the power parameters monitored by this invention are of many types, displaying all of them would require users to search for the specific information, increasing their workload. Furthermore, simultaneous display of multiple data sets can cause interference and lead to reading errors. To avoid this, this invention provides a targeted query function, pushing the corresponding monitoring parameters based on the user's actual needs. Of course, if the user does not have a specific query target, this invention will also perform real-time power monitoring data statistics and store it for later retrospective queries.

[0060] Step S30: Calculate the demand information based on the metering information of each electricity meter and obtain the demand information calculation result.

[0061] Specifically, the power generation of the photovoltaic power station is directly obtained from the second meter 20; the power consumption of the station's transformer cabinet is directly obtained from the third meter 30; the power consumption of the energy storage power station is directly obtained from the fourth meter 40; the power consumption of the photovoltaic power station is directly obtained from the fifth meter 50; the power generation and power consumption of the integrated photovoltaic and energy storage electrical system are directly obtained from the sixth meter 60; the photovoltaic power station system efficiency is obtained from the metering information of the second meter 20 and the metering information of the fifth meter 50, and the calculation rule is as follows:

[0062] P1 = PJ2 - PJ5

[0063] Wherein, P1 represents the photovoltaic power generation of the photovoltaic power station system efficiency; PJ2 represents the metering information of the second meter 20; PJ5 represents the metering information of the fifth meter 50; the amount of electricity generated by the photovoltaic power station and stored in the energy storage station is obtained from the metering information of the first meter 10, the third meter 30, and the fourth meter 40, and the calculation rule is as follows:

[0064] P2 = PJ 1正 +PJ3-PJ 6正

[0065] Where P2 represents the amount of electricity generated by the photovoltaic power station that is stored in the energy storage power station; PJ 1正 PJ3 represents positive measurement information from the first meter 10; PJ3 represents measurement information from the third meter 30; PJ 6正 The sixth meter 60 provides positive metering information; the charging amount for the cycle efficiency of the energy storage power station system is obtained from the metering information of the first meter 10 and the fourth meter 40, and the calculation rule is as follows:

[0066] P3 = PJ 1正 +PJ4

[0067] Wherein, P3 represents the charging amount of the energy storage power station system's cycle efficiency; PJ4 represents the metering information from the fourth meter 40; the discharging amount of the energy storage power station system's cycle efficiency is obtained from the metering information from the first meter 10 and the metering information from the fourth meter 40, and the calculation rule is as follows:

[0068] P4 = PJ 1反 -PJ4

[0069] Where P4 is the discharge quantity of the energy storage power station system's cycle efficiency; PJ 1反 This is the reverse measurement information for the first meter 10.

[0070] Step S40: Push the calculation results of the demand information to the user terminal.

[0071] The present invention also provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the above-described metering method for an integrated photovoltaic and energy storage electrical system.

[0072] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. This program is stored in a storage medium and includes several instructions to cause a microcontroller, chip, or processor to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0073] The optional embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details described above. Within the scope of the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the protection scope of the embodiments of the present invention. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe the various possible combinations.

[0074] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the embodiments of the present invention, they should also be regarded as the content disclosed by the embodiments of the present invention.

Claims

1. A metering method for an integrated photovoltaic-storage electrical system, implemented based on an integrated photovoltaic-storage electrical system, characterized in that, The system includes: an energy storage power station, a photovoltaic power station, a station service transformer, and a PT cabinet connected to the same medium-voltage busbar; wherein, the energy storage power station is connected to the medium-voltage busbar via an energy storage incoming line cabinet; the photovoltaic power station is connected to the medium-voltage busbar via a photovoltaic incoming line cabinet; the PT cabinet is connected to the grid-connected cabinet via a metering cabinet and an outgoing line cabinet; the power generated by the photovoltaic power station is stored in the energy storage power station through the medium-voltage busbar; the station service transformer is used to drive the power consumption schemes of the energy storage power station and the photovoltaic power station; the power consumption of all equipment in the photovoltaic-energy storage integrated electrical system is supplied by the energy storage power station; the PT cabinet is used to protect the medium-voltage busbar and to perform maintenance on the medium-voltage busbar. Line power metering; the system also includes multiple power meters for measuring power at corresponding locations, including: a first meter between the energy storage power station and the medium-voltage busbar; a second meter between the photovoltaic power station and the medium-voltage busbar; a third meter between the station service transformer and the medium-voltage busbar; a fourth meter between the station service transformer and the energy storage power station; a fifth meter between the station service transformer and the photovoltaic power station; and a sixth meter between the PT cabinet and the metering cabinet; the first meter and the sixth meter are bidirectional meters, and the second to fifth meters are unidirectional meters; the method includes: The photovoltaic power station directly stores all the generated electricity into the energy storage station. Only when the entire system cannot store excess electricity will the electricity be directly transmitted to the grid through a port. This port will also supplement the energy storage station with electricity from the mains grid when the photovoltaic power station is underpowered. Real-time acquisition of measurement information from the first to the sixth metering meters; In response to a user trigger signal, the system identifies the user's demand information based on the user trigger signal. The user's demand information includes: energy storage station charging amount, energy storage station discharging amount, photovoltaic power generation, station power consumption, energy storage power consumption, photovoltaic power consumption, power generation of the integrated photovoltaic-storage electrical system, power consumption of the integrated photovoltaic-storage electrical system, photovoltaic power generation at the photovoltaic power station system efficiency, the amount of photovoltaic power stored in the energy storage station, the charging amount at the energy storage station system cycle efficiency, and the discharging amount at the energy storage station system cycle efficiency. The demand information is calculated based on the measurement information from the first to the sixth metering meters, and the demand information calculation result is obtained. The charging amount and discharging amount of the energy storage station are obtained directly from the first meter. The power generation of the photovoltaic power station is obtained directly from the reading of the second meter. The power consumption of the station's transformer cabinet is directly obtained from the reading of the third meter. The electricity consumption of the energy storage power station is directly obtained from the fourth meter. The electricity consumption of the photovoltaic power station is directly obtained from the fifth meter. The power generation and power consumption of the integrated photovoltaic and energy storage electrical system are obtained directly from the sixth meter. The photovoltaic power plant system efficiency, specifically the photovoltaic power generation, is obtained from the metering information of the second meter and the fifth meter. The calculation rule is as follows: in, The power generation of a photovoltaic power station is the system efficiency of the photovoltaic power station. This refers to the measurement information from the second meter. This refers to the measurement information from the fifth measurement meter; The electricity generated by the photovoltaic power station and stored in the energy storage power station is obtained from the metering information of the first meter, the third meter, and the fourth meter, and the calculation rule is as follows: in, The amount of electricity generated by a photovoltaic power plant and stored in an energy storage power plant; This is the positive measurement information from the first meter. This refers to the measurement information from the third meter. This is the positive measurement information for the sixth measurement meter; The charging amount of the energy storage power station system's cycle efficiency is obtained from the metering information of the first meter and the metering information of the fourth meter, and the calculation rule is as follows: in, The amount of charge required to achieve the cycle efficiency of an energy storage power station system; This refers to the measurement information of the fourth measurement meter; The discharge amount of the energy storage power station system's cycle efficiency is obtained from the metering information of the first meter and the metering information of the fourth meter, and the calculation rule is as follows: in, The discharge amount represents the cycle efficiency of the energy storage power station system. This is the reverse measurement information of the first meter; The calculation results of the aforementioned demand information are pushed to the user's terminal.

2. A computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the metering method of the integrated photovoltaic-storage electrical system as described in claim 1.

Images