Optical storage PCS test simulator and system

Abstract

The utility model provides an optical storage PCS test simulator and system. A photovoltaic array simulator and a battery simulator are respectively connected with the input end of an optical storage inverter to be tested through a current and voltage sampling module; the grid-connected simulator and the EPS load are respectively connected with the output end of the to-be-tested optical storage inverter through the current and voltage sampling module; according to the optical storage PCS test simulator of the utility model, through the above connection mode, the time for manually and frequently replacing a test channel and a lead can be saved, and the test efficiency can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of energy storage system testing, in particular to a photovoltaic storage PCS test simulator and system. Background Art

[0002] The PCS refers to the power conversion system in an energy storage system. It controls the charging and discharging of batteries, converting direct current (DC) to alternating current (AC). In a photovoltaic energy storage system, the PCS allows power to flow from solar panels or storage batteries to the grid, or vice versa, to meet diverse energy management needs.

[0003] A photovoltaic-storage inverter is a special type of PCS that not only converts DC power into AC power but also enables bidirectional energy flow—charging the battery when needed and providing power to the grid when needed. This bidirectional conversion capability makes photovoltaic-storage inverters important in the integration of photovoltaic power generation and energy storage systems.

[0004] As a key technology in the renewable energy sector, photovoltaic (PV) inverters have been widely adopted in solar photovoltaic power generation. They integrate solar panels, energy storage batteries, and an inverter, enabling photovoltaic power generation while also storing and regulating electrical energy, further improving the safety, reliability, and economic benefits of PV power plants. Existing PV inverter testing systems require personnel to connect test equipment to the inverter step by step according to test requirements. Due to the large number of inverter test items, frequent changes in test channels and wires are required, resulting in low accuracy and efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a photovoltaic storage PCS test simulator and system to effectively solve the problem of frequent reliance on manual operation during photovoltaic storage testing, thereby improving the efficiency of testing.

[0006] To achieve the above-mentioned purpose, the utility model provides a photovoltaic storage PCS test simulator, comprising: a photovoltaic array simulator, a battery simulator, a grid-connected simulator, an EPS load and a current and voltage sampling module;

[0007] The photovoltaic array simulator and the battery simulator are respectively connected to the input end of the photovoltaic storage inverter to be tested through the current and voltage sampling modules; the grid-connected simulator and the EPS load are respectively connected to the output end of the photovoltaic storage inverter to be tested through the current and voltage sampling modules.

[0008] Furthermore, the photovoltaic array simulator includes two PV simulation power supplies.

[0009] Furthermore, an oscilloscope is included, and the oscilloscope is connected to the current and voltage sampling module.

[0010] Furthermore, the grid-connected simulator is a programmable grid-connected simulator.

[0011] Furthermore, the battery simulator is a programmable bidirectional DC power supply.

[0012] Furthermore, the current and voltage sampling module includes a current transformer and a voltage transformer.

[0013] The present invention also provides a photovoltaic storage PCS test system, including the photovoltaic storage PCS test simulator as described above, and also including an automatic testing system, which is communicatively connected to the photovoltaic array simulator, the battery simulator, the grid-connected simulator and the current and voltage sampling module.

[0014] The external automatic test system includes a test module.

[0015] Furthermore, the test module includes a DC test module, an AC test module, a power test module and an extended test module.

[0016] Furthermore, it also includes an industrial computer, which is connected to the automatic testing system.

[0017] Furthermore, the automatic testing system also includes a test item configuration module and a test result output module.

[0018] Compared with the prior art, the beneficial effects of the present invention are mainly reflected in: providing a photovoltaic storage PCS test simulator and system, wherein the photovoltaic array simulator and battery simulator are respectively connected to the input end of the photovoltaic storage inverter to be tested through the current and voltage sampling modules; the grid-connected simulator and EPS load are respectively connected to the output end of the photovoltaic storage inverter to be tested through the current and voltage sampling modules; the automatic test system is communicatively connected with the photovoltaic array simulator, battery simulator, grid-connected simulator and current and voltage sampling modules. Testing with the photovoltaic storage PCS test system of the present invention can save manual time in frequently changing test channels and wires, greatly improving test efficiency. The automatic test system can perform multi-faceted tests in a short period of time by acquiring, calculating and analyzing data, and can then quickly determine whether the photovoltaic storage inverter to be tested is qualified, thereby improving test efficiency and reducing errors in manual calculation results. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the connection relationship between the main components of the optical storage PCS test simulator according to an embodiment of the present invention;

[0020] Figure 2This is a schematic diagram of the connection relationship between the main components of the optical storage PCS test system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The following, in conjunction with the accompanying drawings, provides a more detailed description of a photovoltaic storage PCS test simulator and system of the present invention. Preferred embodiments of the present invention are shown, and it should be understood that those skilled in the art may modify the present invention as described herein while still achieving the beneficial effects of the present invention. Therefore, the following description should be understood as a general guide for those skilled in the art and not as a limitation of the present invention.

[0022] The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are greatly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.

[0023] Example 1

[0024] like Figure 1 As shown, this embodiment proposes a photovoltaic storage PCS simulator, which aims to improve the automation, efficiency and accuracy of photovoltaic storage inverter testing, including: multiple photovoltaic array simulators, battery simulators, grid-connected simulators, EPS loads and current and voltage sampling modules (CT / VT);

[0025] The multiple photovoltaic array simulators, battery simulators, grid-connected simulators, and EPS loads are all connected to the photovoltaic storage inverter to be tested through the current and voltage sampling module.

[0026] Therefore, in the present invention, the photovoltaic storage inverter to be tested can be connected to multiple photovoltaic array simulators, battery simulators, grid-connected simulators and EPS loads at the same time. Therefore, there is no need for frequent manual replacement as described in the background technology, thereby improving the test efficiency of the comprehensive performance of the photovoltaic storage inverter.

[0027] In this embodiment, the photovoltaic array simulator is a programmable analog power supply PV, specifically the Chroma 62180H-1800S, which can design and verify the maximum power tracking circuit, calculation mechanism and tracking accuracy of the photovoltaic inverter; the battery simulator is a programmable bidirectional DC power supply, specifically the Chroma 62180D-100, which can operate in dual-quadrant power supply and load, and can also operate in constant voltage, constant current, and constant power working modes.

[0028] Further, the photovoltaic array simulator includes two-way PV simulation power supply, which can simulate the power generation characteristics of actual photovoltaic panels under different environmental and working conditions, and is connected with the input end of the photovoltaic storage inverter to be tested through the current-voltage sampling module, so as to ensure the accuracy of the input conditions of the test. The battery simulator serves as a direct current power supply, simulates the battery power supply condition, and is also connected with the input end of the photovoltaic storage inverter to be tested through the current-voltage sampling module, so as to test the performance of the inverter at the direct current input end.

[0029] In the embodiment, the grid-connected simulator is a programmable grid-connected simulator, which can simulate various working states of the power grid, and is connected with the output end of the photovoltaic storage inverter to be tested through the current-voltage sampling module, so as to test the grid-connected performance of the inverter. The EPS load is connected with the output end of the inverter through the current-voltage sampling module, so as to simulate the actual load condition and test the load adaptability of the inverter.

[0030] In the embodiment, the RLC load is also connected with the output end of the photovoltaic storage inverter to be tested through the current-voltage sampling module, so as to test the performance of the inverter under various load conditions. The current-voltage sampling module (including a current transformer and a voltage transformer) is responsible for real-time monitoring and recording of the current and voltage passing through the RLC load, so as to ensure the accuracy of the test data. In this way, the test system of the embodiment can accurately evaluate the output quality and adaptability of the inverter, and provide an important basis for the design and optimization of the inverter.

[0031] In the embodiment, the photovoltaic storage PCS test simulator also includes an oscilloscope connected with the current-voltage sampling module, which is used for capturing and analyzing the current-voltage waveform, and further ensures the accuracy of the test data.

[0032] Embodiment 2

[0033] As shown in Figure 2 Embodiment 1, the embodiment proposes a photovoltaic storage PCS test system, which includes the photovoltaic storage PCS simulator as described in Embodiment 1, and an automatic test system. The automatic test system can realize functions such as direct current test, alternating current test, power test, expansion test, data analysis, test item configuration, and test result output, and can comprehensively cover various test requirements of the inverter.

[0034] The photovoltaic array simulator, the battery simulator, the grid-connected simulator, and the current-voltage sampling module are connected with the automatic test system through a communication interface.

[0035] The optional model of the automatic test system can be Chroma 6180, Kikusui PVS, and other models with related functions.

[0036] Preferably, the test system of this embodiment further includes an industrial computer connected to the automatic test system for monitoring the test process and displaying the test results.

[0037] When using:

[0038] a) Prepare test equipment;

[0039] b) Connect the PV-storage inverter to be tested, with the input end connected to the PV simulated power supply and battery simulator, and the output end connected to the grid simulator, RLC load, and EPS;

[0040] c) Connect the solar-storage inverter to be tested, PV simulation power supply, battery simulator, grid-connected simulator RLC load

[0041] and EPS connections are connected to the automatic test system for testing.

[0042] In summary, the present invention provides a photovoltaic storage PCS test simulator and system. The photovoltaic array simulator and battery simulator are connected to the input of the photovoltaic storage inverter to be tested via current and voltage sampling modules, respectively. The grid-connected simulator and EPS load are connected to the output of the photovoltaic storage inverter to be tested via current and voltage sampling modules, respectively. Testing using the photovoltaic storage PCS test simulator of the present invention can greatly save time associated with frequent replacement of test channels and wires. The automatic test system can perform multi-faceted tests in a short period of time by acquiring, calculating, and analyzing data, and can quickly determine whether the photovoltaic storage inverter to be tested is qualified, thereby improving test efficiency and reducing errors in human calculation results.

[0043] It should be understood that the above-described specific embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the scope of protection of the present invention. In addition, the appended claims of the present invention are intended to cover all variations and modifications that fall within the scope and metes and bounds of the appended claims, or equivalents thereof.

Claims

1. A PCS test simulator for optical storage, characterized in that: include: Photovoltaic array simulator, battery simulator, grid-connected simulator, EPS load and current and voltage sampling module; The photovoltaic array simulator and the battery simulator are respectively connected to the input end of the photovoltaic storage inverter to be tested through the current and voltage sampling modules; the grid-connected simulator and the EPS load are respectively connected to the output end of the photovoltaic storage inverter to be tested through the current and voltage sampling modules.

2. The optical storage PCS test simulator according to claim 1, characterized in that: The photovoltaic array simulator includes two PV simulation power supplies.

3. The optical storage PCS test simulator according to claim 1, characterized in that: It also includes an oscilloscope, which is connected to the current and voltage sampling module test block.

4. The optical storage PCS test simulator according to claim 1, characterized in that: The grid-connected simulator is a programmable grid-connected simulator.

5. The optical storage PCS test simulator according to claim 1, characterized in that: The battery simulator is a programmable bidirectional DC power supply.

6. The optical storage PCS test simulator according to claim 1, characterized in that: The current and voltage sampling module includes a current transformer and a voltage transformer.

7. A photovoltaic storage PCS test system, comprising the photovoltaic storage PCS test simulator according to any one of claims 1 to 6, further comprising: An automatic testing system is communicatively connected with the photovoltaic array simulator, the battery simulator, the grid-connected simulator, and the current and voltage sampling module.

8. The optical storage PCS test system according to claim 7, characterized in that: The automatic testing system includes a testing module.

9. The optical storage PCS test system according to claim 8, characterized in that: The test modules include a DC test module, an AC test module, a power test module and an extended test module.

10. The optical storage PCS test system according to claim 7, characterized in that: It also includes an industrial computer, which is connected to the automatic testing system.

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