A method for checking power of a light storage and charging system and a terminal

Abstract

The application discloses a kind of power checking method and terminal of light storage and filling system, when system is powered on for the first time, the power of battery component, the power of PCS component, the power of photovoltaic component and the power of charging pile component are checked in order, and PCS component, photovoltaic component and charging pile component are opened one by one according to actual checking process and power checking is carried out, so that in the checking process, the failure of single component can be avoided to cause the failure of multiple components, and the checking process can be made more clear and explicit, and the troubleshooting is more thorough, to ensure that the system can be detected whether normal in initial state, to reduce the risk of causing system damage, and to ensure the safe operation of light storage and filling system.

Description

[0001] This case is a divisional application based on the invention patent filed on November 23, 2022, with application number 202211470430.0 and titled "A Safety Verification Method and Terminal for an Optical Storage and Charging System". Technical Field

[0002] This invention relates to the field of safety technology for photovoltaic energy storage and charging systems, and particularly to a power verification method and terminal for photovoltaic energy storage and charging systems. Background Technology

[0003] A photovoltaic-storage-charging system requires a reasonable configuration of charging power, energy storage capacity, and photovoltaic system. At the same time, because the system contains so many components, the safety protection functions of the internal system of the photovoltaic-storage-charging system are also subject to extremely high requirements.

[0004] However, during sampling, existing optical storage and charging systems may experience abnormal sampling values ​​in addition to communication interruptions. When the sampling value is abnormal but still within a reasonable range, the system may not necessarily determine that it is in a fault state, but will continue to operate based on the abnormal sampling value. This can easily lead to a single component failure causing multiple component failures, posing a risk of damaging the system. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a power verification method and terminal for a photovoltaic energy storage and charging system, so as to avoid the situation where a single component failure causes multiple component failures during system operation and ensure the safe operation of the photovoltaic energy storage and charging system.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A power verification method for an optical energy storage and charging system includes: Upon initial power-on, the power of the battery components, PCS components, photovoltaic components, and charging pile components are checked sequentially, specifically as follows: Power on the battery component with high voltage and turn on the PCS component. Determine whether the photovoltaic energy storage and charging system simultaneously satisfies the following conditions: the sum of the power of all battery branches of the battery component equals the total battery circuit power, the total battery circuit power equals the DC circuit power of the PCS component, and the total battery circuit power equals the AC circuit power of the PCS component. If yes, turn on the photovoltaic component; otherwise, report a system fault. After the photovoltaic component is turned on, it is determined whether the photovoltaic storage and charging system simultaneously satisfies the conditions that the photovoltaic module power of the photovoltaic component is equal to the photovoltaic inverter power and the sum of the total battery circuit power and the photovoltaic inverter power is equal to the AC circuit power. If so, the charging pile component is turned on; otherwise, a system fault is reported. After the charging pile component is turned on, determine whether the photovoltaic-storage-charging system simultaneously satisfies the following conditions: the charging pile power of the charging pile component is equal to the DC module power and the total battery circuit power, and the sum of the DC module power and the photovoltaic inverter power is equal to the AC circuit power. If so, the power of each component is normal; otherwise, report a system fault. Determine whether the photovoltaic storage and charging system is functioning properly based on the verification results.

[0007] To solve the above-mentioned technical problems, another technical solution adopted by the present invention is as follows: A power verification terminal for an optical storage and charging system includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it performs the following steps: Upon initial power-on, the power of the battery components, PCS components, photovoltaic components, and charging pile components are checked sequentially, specifically as follows: Power on the battery component with high voltage and turn on the PCS component. Determine whether the photovoltaic energy storage and charging system simultaneously satisfies the following conditions: the sum of the power of all battery branches of the battery component equals the total battery circuit power, the total battery circuit power equals the DC circuit power of the PCS component, and the total battery circuit power equals the AC circuit power of the PCS component. If yes, turn on the photovoltaic component; otherwise, report a system fault. After the photovoltaic component is turned on, it is determined whether the photovoltaic storage and charging system simultaneously satisfies the conditions that the photovoltaic module power of the photovoltaic component is equal to the photovoltaic inverter power and the sum of the total battery circuit power and the photovoltaic inverter power is equal to the AC circuit power. If so, the charging pile component is turned on; otherwise, a system fault is reported. After the charging pile component is turned on, determine whether the photovoltaic-storage-charging system simultaneously satisfies the following conditions: the charging pile power of the charging pile component is equal to the DC module power and the total battery circuit power, and the sum of the DC module power and the photovoltaic inverter power is equal to the AC circuit power. If so, the power of each component is normal; otherwise, report a system fault. Determine whether the photovoltaic storage and charging system is functioning properly based on the verification results.

[0008] The beneficial effects of this invention are as follows: A power verification method and terminal for a photovoltaic-storage-charging system, when the system is initially powered on, sequentially verifies the power of the battery components, the PCS components, the photovoltaic components, and the charging pile components. The PCS components, photovoltaic components, and charging pile components are turned on one by one and their power is verified according to the actual verification process. This avoids the situation where a single component failure causes multiple component failures during the verification process, and also makes the verification process clearer and more thorough, ensuring that the system can be detected as normal in its initial state, comprehensively reducing the risk of system damage and ensuring the safe operation of the photovoltaic-storage-charging system. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the main steps of a power verification method for a photovoltaic energy storage and charging system according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the architecture and power distribution of an optical energy storage and charging system, which is a power verification method for an optical energy storage and charging system according to an embodiment of the present invention. Figure 3 This is a flowchart illustrating the power verification method for an optical energy storage and charging system according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the structure of a power verification terminal for an optical storage and charging system according to an embodiment of the present invention.

[0010] Label Explanation: 1. A power verification terminal for an optical storage and charging system; 2. A processor; 3. A memory. Detailed Implementation

[0011] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0012] Please refer to Figures 1 to 3 A power verification method for an optical energy storage and charging system includes the following steps: Upon initial power-on, the fire protection system, the power of each component, and the lightning protection system of the photovoltaic energy storage and charging system were checked. Determine whether the optical storage and charging system is functioning properly based on the verification results.

[0013] As can be seen from the above description, the beneficial effects of the present invention are as follows: when the system is powered on for the first time, the fire protection system, the power of each component and the lightning protection system of the photovoltaic energy storage and charging system are checked respectively, so as to ensure that the system can be detected as normal in the initial state. By using a combination of component sampling and system sampling, the safe operation of the photovoltaic energy storage and charging system is guaranteed and the risk of damage to the system is reduced.

[0014] Furthermore, the power verification of each component of the optical energy storage and charging system includes: The power of the battery components, PCS components, photovoltaic components, and charging pile components are checked in sequence.

[0015] As can be seen from the above description, the use of component sampling for verification is comprehensive and detailed, which allows for a clear understanding of the location of the fault when a system malfunctions, thus facilitating maintenance work.

[0016] Furthermore, the step of sequentially verifying the power of the battery component, the PCS component, the photovoltaic component, and the charging pile component specifically involves: Power on the battery component with high voltage and turn on the PCS component. Determine whether the photovoltaic energy storage and charging system simultaneously satisfies the following conditions: the sum of the power of all battery branches of the battery component equals the total battery circuit power, the total battery circuit power equals the DC circuit power of the PCS component, and the total battery circuit power equals the AC circuit power of the PCS component. If yes, turn on the photovoltaic component; otherwise, report a system fault. After the photovoltaic component is turned on, it is determined whether the photovoltaic storage and charging system simultaneously satisfies the conditions that the photovoltaic module power of the photovoltaic component is equal to the photovoltaic inverter power and the sum of the total battery circuit power and the photovoltaic inverter power is equal to the AC circuit power. If so, the charging pile component is turned on; otherwise, a system fault is reported. After the charging pile component is turned on, it is determined whether the photovoltaic-storage-charging system simultaneously satisfies the following conditions: the charging pile power of the charging pile component is equal to the DC module power and the total battery circuit power, and the sum of the DC module power and the photovoltaic inverter power is equal to the AC circuit power. If so, the power of each component is normal; otherwise, a system fault is reported.

[0017] As can be seen from the above description, the PCS component, photovoltaic component, and charging pile component are opened one by one according to the actual verification process. This can prevent the failure of a single component from causing the failure of multiple components during the verification process, and can also make the verification process clearer and more thorough.

[0018] Furthermore, the verification of the fire protection system of the photovoltaic energy storage and charging system specifically includes: Check whether the dry contact lines and communication lines of the fire protection system are faulty.

[0019] As can be seen from the above description, in addition to the dry contact lines, the fire protection system is also equipped with communication lines to ensure that even if the dry contact fails or the communication fails, the system has a redundancy and can obtain the current fire protection status, ensuring that it will not operate under fault conditions.

[0020] Furthermore, the verification of the lightning protection system for the photovoltaic energy storage and charging system specifically includes: Verify the status of the surge protectors located on each branch of the lightning protection system.

[0021] As can be seen from the above description, each branch is equipped with a surge protector and has been checked to improve the surge protection level, avoid affecting internal components, and make the system operation safer.

[0022] Please refer to Figure 4 A power verification terminal 1 for an optical storage and charging system includes a memory 3, a processor 2, and a computer program stored in the memory 3 and executable on the processor 2. When the processor 2 executes the computer program, it performs the following steps: Upon initial power-on, the fire protection system, the power of each component, and the lightning protection system of the photovoltaic energy storage and charging system were checked. Determine whether the optical storage and charging system is functioning properly based on the verification results.

[0023] Furthermore, the power verification of each component of the optical energy storage and charging system includes: The power of the battery components, PCS components, photovoltaic components, and charging pile components are checked in sequence.

[0024] As can be seen from the above description, the use of component sampling for verification is comprehensive and detailed. Prioritizing the correct state of the battery system before gradually activating other systems avoids multi-system failures caused by single-system problems. This allows for a clear understanding of the fault location when a system malfunctions, facilitating repair work.

[0025] Furthermore, the step of sequentially verifying the power of the battery component, the PCS component, the photovoltaic component, and the charging pile component specifically involves: Power on the battery component with high voltage and turn on the PCS component. Determine whether the photovoltaic energy storage and charging system simultaneously satisfies the following conditions: the sum of the power of all battery branches of the battery component equals the total battery circuit power, the total battery circuit power equals the DC circuit power of the PCS component, and the total battery circuit power equals the AC circuit power of the PCS component. If yes, turn on the photovoltaic component; otherwise, report a system fault. After the photovoltaic component is turned on, it is determined whether the photovoltaic storage and charging system simultaneously satisfies the conditions that the photovoltaic module power of the photovoltaic component is equal to the photovoltaic inverter power and the sum of the total battery circuit power and the photovoltaic inverter power is equal to the AC circuit power. If so, the charging pile component is turned on; otherwise, a system fault is reported. After the charging pile component is turned on, it is determined whether the photovoltaic-storage-charging system simultaneously satisfies the following conditions: the charging pile power of the charging pile component is equal to the DC module power and the total battery circuit power, and the sum of the DC module power and the photovoltaic inverter power is equal to the AC circuit power. If so, the power of each component is normal; otherwise, a system fault is reported.

[0026] As can be seen from the above description, the PCS component, photovoltaic component, and charging pile component are opened one by one according to the actual verification process. This can prevent the failure of a single component from causing the failure of multiple components during the verification process, and can also make the verification process clearer and more thorough.

[0027] Furthermore, the verification of the fire protection system of the photovoltaic energy storage and charging system specifically includes: Check whether the dry contact lines and communication lines of the fire protection system are faulty.

[0028] As can be seen from the above description, in addition to the dry contact lines, the fire protection system is also equipped with communication lines to ensure that even if the dry contact fails or the communication fails, the system has a redundancy and can obtain the current fire protection status, ensuring that it will not operate under fault conditions.

[0029] Furthermore, the verification of the lightning protection system for the photovoltaic energy storage and charging system specifically includes: Verify the status of the surge protectors located on each branch of the lightning protection system.

[0030] As can be seen from the above description, each branch is equipped with a surge protector and has been checked to improve the surge protection level, avoid affecting internal components, and make the system operation safer.

[0031] The power verification method and terminal for a photovoltaic energy storage and charging system of the present invention can be applied to the scenario of safety testing of photovoltaic energy storage and charging systems. The following is a description of specific implementation methods: Please refer to Figures 1 to 3 Embodiment 1 of the present invention is as follows: A power verification method for an optical energy storage and charging system includes the following steps: Upon initial power-on, the fire protection system, the power of each component, and the lightning protection system of the photovoltaic energy storage and charging system were checked. In this embodiment, the verification of the fire protection system of the photovoltaic energy storage and charging system specifically includes: verifying whether the dry contact line and communication line of the fire protection system are faulty; the fire protection system is connected to the EMS system through the dry contact and communication lines respectively, to ensure that even if the dry contact or communication fails, the system has one redundancy, and the EMS can obtain the current fire protection status to ensure that it will not operate under fault conditions; the verification of the lightning protection system of the photovoltaic energy storage and charging system specifically includes: verifying the status of the surge protectors located on each branch of the lightning protection system.

[0032] In this embodiment, as Figure 1 and 2 As shown, the power verification of each component of the optical energy storage and charging system includes the following steps:

[0033] S1. Check the power of the battery components, PCS components, photovoltaic components, and charging pile components in sequence: The components of the photovoltaic energy storage and charging system are described below: PCS components: directly connected to the 380Vac power grid, including surge protectors, AC transformers, DC current sensors, automatic switches, manual switches, and fuses; the PCS components have AC circuit power ΣP AC and DC circuit power ΣP DC ; Battery components include: a cabinet system and an external total current sensor; each cabinet's cells are connected in series; each cabinet includes its own sensor, as well as total battery voltage sampling and individual cell sampling accumulation verification. Each cabinet contains a fuse, and each cabinet includes an automatic switch, a manual switch, and a fuse; the battery components have battery branch power ΣP. Rack and total battery circuit power ΣP Battery ; Photovoltaic components: Each MPPT circuit in the photovoltaic combiner box includes a DC current transformer for data acquisition, and each photovoltaic input circuit has a built-in fuse for protection, ensuring no short circuits occur between the photovoltaic DC input circuits. Simultaneously, the photovoltaic inverter also includes a DC acquisition module for data acquisition. The photovoltaic system includes manual switches, automatic switches, and fuses; the photovoltaic components have the photovoltaic module power ΣP. PV and photovoltaic inverter power ΣP INV ; Charging pile components: These include a built-in DC power module and an external charging pile system. Both the charging pile system and the DC module system include DC current sensors, and both the charging pile and the DC module include automatic switches, manual switches, and fuses. The charging pile components have a charging pile power ΣP. Cha and DC module power ΣP power .

[0034] In this embodiment, the battery component, PCS component, photovoltaic component, and charging pile component are connected together via a DC circuit. The advantage is that during the power-on self-test process, even if a fault or fluctuation occurs, internal faults are prevented from disturbing the power grid, ensuring grid stability. In this embodiment, for example... Figure 3 As shown, the specific verification process for each component of the optical storage and charging system is as follows: Power on the battery components with high voltage and turn on the PCS components. Determine whether the photovoltaic-storage-charging system simultaneously satisfies the following conditions: the sum of the power of all battery branches of the battery components equals the total battery circuit power, the total battery circuit power equals the DC circuit power of the PCS components, and the total battery circuit power equals the AC circuit power of the PCS components. If so, turn on the photovoltaic components; otherwise, report a system fault. Before energizing the battery components with high voltage, ensure that all cell data can be collected; after energizing the battery components with high voltage, verify that the sum of the voltages of all cells equals the total voltage of the cabinet.

[0035] After the photovoltaic component is turned on, determine whether the photovoltaic storage and charging system simultaneously satisfies the following conditions: the photovoltaic module power of the photovoltaic component is equal to the photovoltaic inverter power, and the sum of the battery total circuit power and the photovoltaic inverter power is equal to the AC circuit power. If so, turn on the charging pile component; otherwise, report a system fault. After the charging pile component is turned on, determine whether the photovoltaic-storage-charging system simultaneously satisfies the following conditions: the charging pile power of the charging pile component is equal to the DC module power and the total battery circuit power, and the sum of the DC module power and the photovoltaic inverter power is equal to the AC circuit power. If so, the power of each component is normal; otherwise, report a system fault.

[0036] As can be seen, performing fire protection checks, battery checks, AC / DC checks, photovoltaic + battery checks, and photovoltaic + battery + charging checks in sequence ensures that the system's status can be checked in its initial state, guaranteeing safe operation thereafter. Furthermore, the surge protectors are checked sequentially according to the opening order of the battery component, PCS component, photovoltaic component, and charging pile component, verifying the status of the surge protectors located on each of these components.

[0037] S2. Determine whether the photovoltaic storage and charging system is normal based on the verification results.

[0038] In this embodiment, the optical storage and charging system is considered normal and can enter the operating mode only after all the above verification processes have passed correctly.

[0039] Therefore, in this embodiment, after initial power-on, safety tests are performed on fire protection, the power of each component, and lightning protection, depending on the importance of the equipment. This ensures that if problems arise in the initial state, the equipment will not continue to be used and cause secondary damage.

[0040] In this embodiment, after the initial power-on, the EMS will continuously verify the status of each item and will protect the system in case of any logic failure, thus protecting the system through rigorous logic.

[0041] Please refer to Figure 4 Embodiment two of the present invention is as follows: A power verification terminal 1 for an optical storage and charging system includes a memory 3, a processor 2, and a computer program stored in the memory 3 and run on the processor 2. When the processor 2 executes the computer program, it implements the steps of the above embodiment 1.

[0042] In summary, the power verification method and terminal for a photovoltaic energy storage and charging system provided by this invention verifies the power of the fire protection system, each component, and the lightning protection system of the photovoltaic energy storage and charging system when the system is initially powered on. This ensures that the system's normal operation can be detected in its initial state. The method combines component sampling and system sampling, and verifies the components one by one by opening them to avoid the occurrence of multiple component failures due to a single component failure. A communication line is established on the fire protection system, and lightning arresters are installed on each branch of the system to ensure the safe operation of the photovoltaic energy storage and charging system and reduce the risk of system damage.

[0043] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A power verification method for a photovoltaic energy storage and charging system, characterized in that, include: Upon initial power-on, the power of the battery components, PCS components, photovoltaic components, and charging pile components are checked sequentially, specifically as follows: Power on the battery component with high voltage and turn on the PCS component. Determine whether the photovoltaic energy storage and charging system simultaneously satisfies the following conditions: the sum of the power of all battery branches of the battery component equals the total battery circuit power, the total battery circuit power equals the DC circuit power of the PCS component, and the total battery circuit power equals the AC circuit power of the PCS component. If yes, turn on the photovoltaic component; otherwise, report a system fault. After the photovoltaic component is turned on, it is determined whether the photovoltaic storage and charging system simultaneously satisfies the conditions that the photovoltaic module power of the photovoltaic component is equal to the photovoltaic inverter power and the sum of the total battery circuit power and the photovoltaic inverter power is equal to the AC circuit power. If so, the charging pile component is turned on; otherwise, a system fault is reported. After the charging pile component is turned on, determine whether the photovoltaic-storage-charging system simultaneously satisfies the following conditions: the charging pile power of the charging pile component is equal to the DC module power and the total battery circuit power, and the sum of the DC module power and the photovoltaic inverter power is equal to the AC circuit power. If so, the power of each component is normal; otherwise, report a system fault. Determine whether the photovoltaic storage and charging system is functioning properly based on the verification results.

2. The power verification method for a photovoltaic energy storage and charging system according to claim 1, characterized in that, Also includes: After the initial power-on is completed, the control EMS continuously verifies the power of each component.

3. The power verification method for a photovoltaic energy storage and charging system according to claim 1, characterized in that, Also includes: Following the opening sequence of the battery component, the PCS component, the photovoltaic component, and the charging pile component, the status of the surge protectors located on the battery component, the PCS component, the photovoltaic component, and the charging pile component are checked sequentially.

4. The power verification method for a photovoltaic energy storage and charging system according to claim 1, characterized in that, Also includes: Collect all cell data before applying high voltage to the battery components; After the battery components are powered on at high voltage, verify that the sum of the voltages of all the cells equals the total voltage of the cabinet.

5. A power verification terminal for a photovoltaic energy storage and charging system, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it performs the following steps: Upon initial power-on, the power of the battery components, PCS components, photovoltaic components, and charging pile components are checked sequentially, specifically as follows: Power on the battery component with high voltage and turn on the PCS component. Determine whether the photovoltaic energy storage and charging system simultaneously satisfies the following conditions: the sum of the power of all battery branches of the battery component equals the total battery circuit power, the total battery circuit power equals the DC circuit power of the PCS component, and the total battery circuit power equals the AC circuit power of the PCS component. If yes, turn on the photovoltaic component; otherwise, report a system fault. After the photovoltaic component is turned on, it is determined whether the photovoltaic storage and charging system simultaneously satisfies the conditions that the photovoltaic module power of the photovoltaic component is equal to the photovoltaic inverter power and the sum of the total battery circuit power and the photovoltaic inverter power is equal to the AC circuit power. If so, the charging pile component is turned on; otherwise, a system fault is reported. After the charging pile component is turned on, determine whether the photovoltaic-storage-charging system simultaneously satisfies the following conditions: the charging pile power of the charging pile component is equal to the DC module power and the total battery circuit power, and the sum of the DC module power and the photovoltaic inverter power is equal to the AC circuit power. If so, the power of each component is normal; otherwise, report a system fault. Determine whether the photovoltaic storage and charging system is functioning properly based on the verification results.

6. A power verification terminal for a photovoltaic energy storage and charging system according to claim 5, characterized in that, Also includes: After the initial power-on is completed, the control EMS continuously verifies the power of each component.

7. A power verification terminal for a photovoltaic energy storage and charging system according to claim 5, characterized in that, Also includes: Following the opening sequence of the battery component, the PCS component, the photovoltaic component, and the charging pile component, the status of the surge protectors located on the battery component, the PCS component, the photovoltaic component, and the charging pile component are checked sequentially.

8. A power verification terminal for a photovoltaic energy storage and charging system according to claim 5, characterized in that, Also includes: Collect all cell data before applying high voltage to the battery components; After the battery components are powered on at high voltage, verify that the sum of the voltages of all the cells equals the total voltage of the cabinet.

Images