Universal battery and photovoltaic energy storage inverter matching test platform

Abstract

The utility model discloses a universal battery and photovoltaic energy storage inverter matching test platform. The universal battery and photovoltaic energy storage inverter matching test platform comprises a photovoltaic access module, a battery access module, a power grid access module and an EPS emergency load access module, the photovoltaic access module is connected with a PV interface of a tested photovoltaic energy storage inverter, the battery access module is connected with a BAT interface of the tested photovoltaic energy storage inverter, the power grid access module is connected with a GRID interface of the tested photovoltaic energy storage inverter, and the EPS emergency load access module is connected with an EPS / Backup interface and a GRID interface of the tested photovoltaic energy storage inverter. The battery access module comprises a tested battery module, and the tested battery module is electrically connected with a BAT interface of a tested photovoltaic energy storage inverter. According to the utility model, most three-phase and single-phase photovoltaic energy storage inverters in the market can be compatible, input and output of most electrical interfaces of the photovoltaic energy storage inverters can be provided, and communication protocol adaptation, parameter configuration, working mode and performance tests of the photovoltaic energy storage inverters can be carried out. The device is suitable for matching test of energy storage batteries of different manufacturer models and photovoltaic energy storage inverters.

Description

TECHNICAL FIELD

[0001] The utility model relates to a general battery and photovoltaic energy storage inverter matching test platform. BACKGROUND

[0002] Photovoltaic power generation is an intermittent energy source, closely related to the changes of meteorological conditions such as four seasons, day and night, and sunny and cloudy, and has problems such as volatility, randomness, and supply-demand matching.

[0003] The photovoltaic energy storage inverter connects the energy storage battery and the power grid on the basis of converting the power generated by the photovoltaic power generation system, and through bidirectional conversion of AC and DC and control of the charging and discharging process of the energy storage battery, the electric energy generated by photovoltaic can be preferentially used by local loads, and the excess energy is stored in the energy storage battery. In the case of still having surplus electric energy, it is selectively integrated into the power grid. When the electric energy generated by photovoltaic is insufficient, the energy storage battery discharges to provide electric energy for local loads.

[0004] As a key supporting technology, the energy storage battery can improve the utilization rate of renewable energy, ensure the safe and stable operation of the power grid, and is an important support for energy transformation.

[0005] When the energy storage battery and the photovoltaic energy storage inverter build a photovoltaic energy storage system, the energy storage battery and the photovoltaic energy storage inverter need to be matched and tested, including but not limited to power communication cable connection, information interaction adaptation, function performance test, etc. However, there is no industry standard to unify the electrical interfaces, communication protocols, functions and working modes of photovoltaic energy storage inverters. Therefore, if the energy storage battery is matched with photovoltaic energy storage inverters of different manufacturers and different models, different test platforms need to be built for the matching test of photovoltaic energy storage inverters.

[0006] Temporarily building different photovoltaic energy storage inverter test platforms not only wastes a lot of time and resources, but also affects the accuracy and reliability of some electrical devices in the test platform due to frequent disassembly and assembly. In addition, if the system test platform is not well isolated and protected, accidents may occur. UTILITY MODEL CONTENT

[0007] The utility model aims to provide a general battery and photovoltaic energy storage inverter matching test platform to solve the technical problems mentioned in the background technology.

[0008] The technical scheme for achieving the utility model is: a universal battery and photovoltaic energy storage inverter matching test platform, comprising a photovoltaic access module, a battery access module, a power grid access module and an EPS emergency load access module; the photovoltaic access module is connected with a PV interface of a measured photovoltaic energy storage inverter, the battery access module is connected with a BAT interface of the measured photovoltaic energy storage inverter, the power grid access module is connected with a GRID interface of the measured photovoltaic energy storage inverter, and the EPS emergency load access module is connected with an EPS / Backup interface and the GRID interface of the measured photovoltaic energy storage inverter; the battery access module comprises a measured battery module, and the measured battery module is electrically connected with the BAT interface of the measured photovoltaic energy storage inverter.

[0009] Further, the photovoltaic access module comprises a PV photovoltaic simulation source, a first DC circuit breaker and a first parallel box, the PV photovoltaic simulation source is electrically connected with the measured photovoltaic energy storage inverter, the first DC circuit breaker is arranged between the PV photovoltaic simulation source and the measured photovoltaic energy storage inverter, and the first parallel box is arranged between the first DC circuit breaker and the measured photovoltaic energy storage inverter.

[0010] Further, the first parallel box divides the input of the PV photovoltaic simulation source into four-way PV photovoltaic input, and the four-way PV photovoltaic input is connected with the measured photovoltaic energy storage inverter.

[0011] Further, the battery access module further comprises a second parallel box, a second DC circuit breaker, a current transformer, a multi-channel power analyzer and a voltage monitoring probe, the second parallel box is arranged between the measured battery module and the measured photovoltaic energy storage inverter, the second DC circuit breaker is arranged between the second parallel box and the measured photovoltaic energy storage inverter, and the current transformer, the multi-channel power analyzer and the voltage monitoring probe monitor the voltage and the current of the battery loop together.

[0012] Further, the measured battery module is provided with four groups, and the second parallel box combines the multiple measured battery modules into one way and is connected with the measured photovoltaic energy storage inverter.

[0013] Further, the power grid access module comprises a loss-of-voltage trip circuit breaker, a smart meter, a current transformer, a power grid simulation source / 220V alternating current power grid, a first leakage protector, and a general load / RLC simulation load, the power grid simulation source / 220V alternating current power grid is electrically connected with the measured photovoltaic energy storage inverter, the loss-of-voltage trip circuit breaker is arranged between the power grid simulation source / 220V alternating current power grid and the measured photovoltaic energy storage inverter, and the input end of the general load / RLC simulation load is connected between the power grid simulation source / 220V alternating current power grid and the measured photovoltaic energy storage inverter after being connected with the first leakage protector.

[0014] Further, the EPS emergency load access module comprises an alternating current circuit breaker, a dual power supply switch, a second leakage protector and an EPS load, the dual power supply switch comprises two input ends and one output end, the EPS load is connected to the output end of the dual power supply switch through the second leakage protector, one input end of the dual power supply switch is connected to the EPS / Backup interface of the measured photovoltaic energy storage inverter through the alternating current circuit breaker, and the other input end is connected to the GRID interface of the measured photovoltaic energy storage inverter.

[0015] By adopting the technical scheme, the utility model has the following beneficial effects:

[0016] (1) The utility model discloses compatible with most three-phase, single-phase photovoltaic energy storage inverters in the market, provides the input and output of most electrical interfaces of photovoltaic energy storage inverters, can carry out communication protocol adaptation, parameter configuration, working mode and performance test of photovoltaic energy storage inverters, and is suitable for matching test of energy storage batteries and photovoltaic energy storage inverters of different manufacturers.

[0017] (2) The utility model discloses provide at most 4 photovoltaic input interfaces to the measured photovoltaic energy storage inverter, satisfy the multichannel photovoltaic input demand of the measured photovoltaic energy storage inverter.

[0018] (3) The utility model discloses that alternating current circuit breaker or voltage-loss tripping circuit breaker is designed in each output loop, and leakage protector is designed in the front end of load loop, can effectively prevent the electric shock, electrical fire and electrical equipment damage caused by short circuit, misoperation and circuit fault, improve the safety and reliability of system platform.

[0019] (4) The utility model discloses that dual power supply switch is designed in the front end of EPS emergency load, and the RMS value and phase of the three-phase voltage of two power supplies of three-phase four-wire power grid supply can be detected in real time, and reliable and fast switching can be carried out between main power supply and standby power supply, when the main power supply has power grid fault such as overvoltage, undervoltage or open phase, can be switched from main power supply to standby power supply automatically and quickly, ensure that EPS load equipment can still normally operate, improve the reliability of EPS load power supply circuit, and better test photovoltaic energy storage inverter off-grid switching and EPS output function. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to make the content of the utility model more easily understood clearly, the utility model is further explained in detail below according to specific embodiments and in conjunction with drawings, wherein

[0021] Figure 1 It is the system principle diagram of the utility model.

[0022] Figure 2 It is the photovoltaic access module PV multi-input scheme schematic diagram of the utility model.

[0023] Figure 3 The utility model discloses a battery access module multiple battery parallel connection scheme schematic diagram.

[0024] Figure 4 The utility model discloses an EPS load dual power supply scheme schematic diagram.

[0025] The reference in the drawing is: photovoltaic access module 1, PV photovoltaic analog source 1-1, first direct current circuit breaker 1-2, first parallel box 1-3, battery access module 2, measured battery module 2-1, second parallel box 2-2, second direct current circuit breaker 2-3, power grid access module 3, voltage-loss tripping circuit breaker 3-1, power grid analog source / 220V AC power grid 3-2, first earth leakage protector 3-3, ordinary load / RLC analog load 3-4, EPS emergency load access module 4, AC circuit breaker 4-1, dual power supply switch 4-2, second earth leakage protector 4-3, EPS load 4-4, measured photovoltaic energy storage inverter 5. DETAILED DESCRIPTION

[0026] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the drawings and specific embodiments of the specification.

[0027] In order to make the purpose, technical scheme and advantage of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be described clearly and completely in conjunction with the drawings in the utility model embodiment. Obviously, the described embodiments are part of the embodiments of the utility model, not all the embodiments. The components of the utility model embodiments described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor belong to the scope of protection of the utility model.

[0029] It should be noted that: similar signs and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0030] In the description of the embodiments of the utility model, it is understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0031] In the description of the embodiments of the utility model, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "set", "mount", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. The utility model will be further described below in conjunction with the drawings. The following examples are only used to more clearly illustrate the technical scheme of the utility model, and cannot limit the protection scope of the utility model.

[0032] (Example 1)

[0033] See Figures 1-4 The universal battery and photovoltaic energy storage inverter matching test platform of the embodiment comprises a photovoltaic access module 1, a battery access module 2, a power grid access module 3 and an EPS emergency load access module 4; the photovoltaic access module 1 is connected with the PV interface of the measured photovoltaic energy storage inverter 5, the battery access module 2 is connected with the BAT interface of the measured photovoltaic energy storage inverter 5, the power grid access module 3 is connected with the GRID interface of the measured photovoltaic energy storage inverter 5, and the EPS emergency load access module 4 is connected with the EPS / Backup interface and the GRID interface of the measured photovoltaic energy storage inverter 5.

[0034] Specifically, see Figure 2The photovoltaic access module 1 comprises a PV photovoltaic simulation source 1-1, a first DC circuit breaker 1-2 and a first parallel box 1-3. The PV photovoltaic simulation source 1-1 is electrically connected to the measured photovoltaic energy storage inverter 5. The first DC circuit breaker 1-2 is arranged between the PV photovoltaic simulation source 1-1 and the measured photovoltaic energy storage inverter 5. The first parallel box 1-3 is arranged between the first DC circuit breaker 1-2 and the measured photovoltaic energy storage inverter 5. The PV photovoltaic simulation source 1-1 can simulate various photovoltaic cell panel output characteristics. The first DC circuit breaker 1-2 can control the on-off of the entire PV circuit and effectively prevent electric shock and equipment damage caused by short circuit or misoperation. The first parallel box 1-3 can divide the 1-1 path output circuit of the PV photovoltaic simulation source into at most 4 paths of output, meeting the multi-path photovoltaic input requirement of the measured photovoltaic energy storage inverter.

[0035] See Figure 3 The battery access module 2 comprises a measured battery module 2-1, a second parallel box 2-2, a second DC circuit breaker 2-3, a current transformer, a multi-channel power analyzer and a voltage monitoring probe. The measured battery module 2-1 is electrically connected to the measured photovoltaic energy storage inverter 5. The second parallel box 2-2 is arranged between the measured battery module 2-1 and the measured photovoltaic energy storage inverter 5. The second DC circuit breaker 2-3 is arranged between the second parallel box 2-2 and the measured photovoltaic energy storage inverter 5. The second parallel box 2-2 can connect at most 4 measured battery modules 2-1 in parallel into 1 path to the measured photovoltaic energy storage inverter 4. The second DC circuit breaker 2-3 can control the on-off of the entire battery circuit and effectively prevent electric shock and equipment damage caused by short circuit or misoperation. The current transformer, the multi-channel power analyzer and the voltage monitoring probe are used together to monitor the voltage and current of the battery circuit in real time.

[0036] The grid access module 3 includes a loss-of-voltage trip circuit breaker 3-1, a smart meter, a current transformer, a grid simulation source / 220V AC grid 3-2, a first leakage protector 3-3, and a general load / RLC simulation load 3-4. The grid simulation source / 220V AC grid 3-2 is electrically connected to the measured photovoltaic energy storage inverter 5. The loss-of-voltage trip circuit breaker 3-1 is arranged between the grid simulation source / 220V AC grid 3-2 and the measured photovoltaic energy storage inverter 5. The input end of the general load / RLC simulation load 3-4 is connected to the first leakage protector 3-3 and then connected between the grid simulation source / 220V AC grid 3-2 and the measured photovoltaic energy storage inverter 5. The grid simulation source can simulate the normal and abnormal characteristics of domestic and international grids. The loss-of-voltage trip circuit breaker 3-1 can effectively prevent damage to the inverter and the load caused by sudden voltage drop or loss of voltage of the grid. The smart meter, together with the current transformer, can be used to monitor the AC voltage and current of the grid loop in real time, and can calculate and display the power consumption and power feeding in the grid loop. The first leakage protector 3-3 can effectively prevent electric shock, electrical fire, and damage to electrical equipment during a fault. The general load / RLC simulation load 3-4, as an important component of the system matching test bench, can test various working modes of the photovoltaic energy storage inverter off-grid and grid-connected. This module can perform tests such as harmonic, interharmonic, flicker, high-low voltage ride-through, and three-phase imbalance.

[0037] See Figure 4 The EPS emergency load access module 4 includes an AC circuit breaker 4-1, a dual power switch 4-2, a second leakage protector 4-3, and an EPS load 4-4. The dual power switch 4-2 includes two input ends and one output end. The EPS load 4-4 is connected to the output end of the dual power switch 4-2 through the second leakage protector 4-3. One input end of the dual power switch 4-2 is connected to the EPS / Backup interface of the measured photovoltaic energy storage inverter 5 through the AC circuit breaker 4-1, and the other input end is connected to the GRID interface of the measured photovoltaic energy storage inverter 5. The AC circuit breaker 4-1 can control the on-off of the EPS load circuit, and can effectively prevent electric shock and equipment damage caused by short circuit or misoperation. The dual power switch 4-2 can quickly and reliably switch between the main power and the backup power to ensure that the EPS load cannot be powered off. The second leakage protector 4-3 can effectively prevent electric shock, electrical fire, and damage to electrical equipment during a fault. The EPS load 4-4 is an uninterrupted power supply load, which can test the grid switching and EPS output function of the photovoltaic energy storage inverter.

[0038] The above-described specific embodiments further specifically describe the purposes, technical solutions and beneficial effects of the present application, and it should be understood that the above-described specific embodiments are merely examples of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A universal battery and photovoltaic energy storage inverter matching test platform, characterized in that: The photovoltaic access module (1), the battery access module (2), the grid access module (3) and the EPS emergency load access module (4) are included; the photovoltaic access module (1) is connected with the PV interface of the measured photovoltaic energy storage inverter (5), the battery access module (2) is connected with the BAT interface of the measured photovoltaic energy storage inverter (5), the grid access module (3) is connected with the GRID interface of the measured photovoltaic energy storage inverter (5), and the EPS emergency load access module (4) is connected with the EPS / Backup interface and the GRID interface of the measured photovoltaic energy storage inverter (5); the battery access module (2) includes a measured battery module (2-1), and the measured battery module (2-1) is electrically connected with the BAT interface of the measured photovoltaic energy storage inverter (5).

2. The universal battery and photovoltaic energy storage inverter matching test platform according to claim 1, characterized in that: The photovoltaic access module (1) includes a PV photovoltaic analog source (1-1), a first DC circuit breaker (1-2) and a first parallel box (1-3), the PV photovoltaic analog source (1-1) is electrically connected with the measured photovoltaic energy storage inverter (5), the first DC circuit breaker (1-2) is arranged between the PV photovoltaic analog source (1-1) and the measured photovoltaic energy storage inverter (5), and the first parallel box (1-3) is arranged between the first DC circuit breaker (1-2) and the measured photovoltaic energy storage inverter (5).

3. The universal battery and photovoltaic energy storage inverter matching test platform according to claim 2, characterized in that: The first parallel box (1-3) divides the input of the PV photovoltaic analog source (1-1) into four-way PV photovoltaic input, and the four-way PV photovoltaic input is connected with the measured photovoltaic energy storage inverter (5).

4. The universal battery and photovoltaic energy storage inverter matching test platform according to claim 1, characterized in that: The battery access module (2) further includes a second parallel box (2-2), a second DC circuit breaker (2-3), a current transformer, a multi-channel power analyzer and a voltage monitoring probe, the second parallel box (2-2) is arranged between the measured battery module (2-1) and the measured photovoltaic energy storage inverter (5), the second DC circuit breaker (2-3) is arranged between the second parallel box (2-2) and the measured photovoltaic energy storage inverter (5), and the current transformer, the multi-channel power analyzer and the voltage monitoring probe monitor the voltage and current of the battery loop together.

5. The universal battery and photovoltaic energy storage inverter matching test platform according to claim 4, characterized in that: The measured battery module (2-1) is provided with four groups, and the second parallel box (2-2) combines the multiple measured battery modules (2-1) into one way and is connected with the measured photovoltaic energy storage inverter (5).

6. The universal battery and photovoltaic energy storage inverter matching test platform according to claim 1, characterized in that: The grid access module (3) includes a loss-of-voltage trip circuit breaker (3-1), a smart meter, a current transformer, a grid analog source / 220V AC grid (3-2), a first leakage protector (3-3) and a general load / RLC analog load (3-4), the grid analog source / 220V AC grid (3-2) is electrically connected with the measured photovoltaic energy storage inverter (5), the loss-of-voltage trip circuit breaker (3-1) is arranged between the grid analog source / 220V AC grid (3-2) and the measured photovoltaic energy storage inverter (5), and the input end of the general load / RLC analog load (3-4) is connected with the first leakage protector (3-3) and then connected between the grid analog source / 220V AC grid (3-2) and the measured photovoltaic energy storage inverter (5).

7. The universal battery and photovoltaic energy storage inverter matching test platform according to claim 1, characterized in that: The EPS emergency load access module (4) comprises an AC circuit breaker (4-1), a dual power switch (4-2), a second leakage protector (4-3) and an EPS load (4-4), the dual power switch (4-2) comprises two input ends and one output end, the EPS load (4-4) is connected to the output end of the dual power switch (4-2) through the second leakage protector (4-3), one input end of the dual power switch (4-2) is connected to the EPS / Backup interface of the measured photovoltaic energy storage inverter (5) through the AC circuit breaker (4-1), and the other input end is connected to the GRID interface of the measured photovoltaic energy storage inverter (5).

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