Main Test Equipment for PV System Test

       The main test equipment can be operated by the upper computer, and the operating software of the upper computer is provided free of charge. The centralized control program of the upper computer can be customized and developed to provide customized development services for one-key automatic testing and automatic generation of reports.

The system meets the test requirements of the following standards:

● Golden Sun Certification Standard CGC/GF004:2011 Technical Conditions for Grid-connected PV Power Generation Inverter

● Enterprise Standard of State Grid Corporation of China Q/GDW 617-2011 Technical Rule for Connecting Photovoltaic Power Station to Power Grid

● Germany DIN V VDE V 0126-1-1:2011 Specification for inverters used in low voltage distribution networks

● Germany VDE-AR-N 4105:2011(E) Connection of electricity generation systems to low voltage distribution networks

● BDEW, Germany: 2008 Technical Guidelines for Connecting Power Plants to Medium Voltage Grids

● United StatesUL 1741-2010 Standard for Inverters and Controllers Applied to Power Systems

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The main characteristics of the grid simulation source are as follows:

1. Four-quadrant AC source, with energy feedback to the power grid;

2. Be able to simulate the low/zero voltage ride through characteristics of the power grid according to the low voltage ride through requirements defined in standards such as State Grid and Germany BDEW;

3. Three-phase decoupling design is adopted for output, which can simulate the normal and abnormal characteristics of three-phase balance or imbalance of various power grids. The output voltage, phase and frequency can be set at will;

4. It is allowed to set 2-25 times of voltage harmonic components at the fundamental frequency of 50Hz or 60Hz to form a periodic distortion waveform; it is used for tests in IEC 61000-4-13, GB/T 14549-1993, GB/T 24337-2009 and other standards.

The main characteristics of the solar panel simulation source are as follows:

1. The number of simulation points is more than 1000, and the static characteristics of the I-V curve can be accurately simulated;

2. The optimized communication transmission mode is adopted, and the I-V curve can be quickly switched (typically 1s), accurately simulating the rapid change characteristics of dynamic MPPT tracking and local shadow;

3. The software has built-in standard curves of EN50530 and CGC/GF004 on static and dynamic MPPT tests, with one key to call the test;

4. The software has a typical curve library that simulates different types of photovoltaic panels for users to call, and has all-weather curve clusters that simulate different weather conditions such as sunny days and cloudy days. The device software can export any I-V curve to generate files.

Typical waveform

Zero voltage ride through

Harmonic simulation