In this context, manufacturers and users of new energy power generation equipment are generally concerned about the performance of equipment in complex power grid environments. For example, the intermittent and volatile nature of new energy power generation leads to instability in grid voltage and frequency, which can easily lead to islanding effects, threatening grid safety and equipment life; when grid voltage fluctuates significantly, high and low voltage ride-through capabilities are insufficient, and new energy power generation equipment may be disconnected from the grid, affecting the continuity of power supply. The lack of accurate and efficient detection methods and equipment makes it difficult to comprehensively evaluate and optimize the performance of new energy power generation equipment.

Therefore, with the introduction of IEC62116 "Anti-islanding test method for inverters for photovoltaic grid-connected systems", higher requirements have been put forward for the testing and inspection of grid-connected inverter products. In response to this technical demand of the new energy industry, Qingdao Sunwin Technologies Co., Ltd. (hereinafter referred to as "Sunwin") independently developed an anti-islanding test platform. As a professional boutique in the field of power supply testing in China, it strictly follows the relevant requirements of IEC62116 and provides a one-stop solution for factory testing and type testing of grid-connected inverter products. The platform integrates high-precision testing functions and intelligent control systems, which can simulate the occurrence of islanding effects to achieve comprehensive testing of inverters in complex working environments.

Specifications and functions can be customized according to user needs

Comprehensive test functions: The platform not only has basic functions such as testing island formation and structural strength, but also realizes precise control of current, voltage and frequency through three-phase independent adjustment technology. Even under the condition of unbalanced three-phase voltage, the resonance point of each phase can be accurately debugged to ensure the accuracy and reliability of the test results.

Real load simulation: Built-in pure resistive, inductive and capacitive loads can simulate various complex working environments. This design makes the test results closer to the actual application scenario and provides strong support for the performance evaluation of the inverter.

Intuitive harmonic analysis: The host is equipped with voltage harmonic and current harmonic detection functions, which can intuitively display the harmonic content in the form of a bar graph to help users quickly identify and solve problems.

Intelligent control: As a fully automatic detection platform, the RLC anti-islanding load realizes automatic adjustment and optimization of key parameters such as quality factor through software, which greatly improves the detection efficiency and accuracy and avoids human detection errors.

Application scenarios:

1. Photovoltaic inverter production test: During the production process of photovoltaic inverters, the RLC anti-islanding test platform is used to verify the anti-islanding protection function of the product to ensure that the product meets the grid connection requirements.

2. Energy storage inverter test: As an important part of the smart grid, the anti-islanding protection capability of the energy storage inverter is equally important. The RLC anti-islanding test platform can be used for type testing and factory testing of energy storage inverters.

3. Scientific research and educational institutions: Scientific research institutions and educational institutions can use this platform to conduct research and teaching experiments on new energy power generation technology to improve scientific research level and teaching quality.

In terms of the safety and stability of new energy grid connection, Sunwin strictly follows the standard requirements of GB/T 36995-2018 "Test Procedure for Fault Voltage Ride-Through Capability of Wind Turbines", GB/T 31365-2015 "Test Procedure for Photovoltaic Power Station Access to the Grid" and the National Energy Administration NB/T 31111-2017 "Test Procedure for High Voltage Ride-Through of Wind Turbines", and launched a high and low voltage ride-through detection platform to provide a scientific solution for new energy power generation grid connection detection.

Specifications and functions can be customized according to user needs

This platform not only meets the needs of grid-connected detection of new energy power stations, but also provides solid technical support for the stable operation of the power system. The real simulation of grid faults and fault location simulation functions provide users with comprehensive testing services. First of all, its intelligent control system supports local, remote and intelligent operations, which provides great convenience for users. Secondly, the platform has 256 low-through gears and 256 high-through gears, which can meet the testing needs of various models. In addition, the self-developed special high-speed sampling recorder ensures the accuracy and integrity of data records, and the real simulation of grid faults and fault location simulation functions provide users with comprehensive testing services.

In terms of safety performance, Sunwin's high and low voltage through detection platform also performs well. The system has a complete protection mechanism, including emergency stop, short circuit, overvoltage, overheating and smoke protection. The secondary power supply is isolated and purified to avoid the inversion phenomenon during the debugging process, further ensuring the safety of the system.

Application scenarios:

1. Grid-connected detection of new energy power stations: Before wind farms, photovoltaic power stations and distributed power stations are connected to the grid, the high and low voltage ride-through detection platform is used to verify the high and low voltage ride-through capabilities of the power generation equipment to ensure that the power station can be safely and stably connected to the grid.

2. Factory testing of equipment manufacturers: New energy power generation equipment manufacturers can use this platform to test and verify the high and low voltage ride-through capabilities of factory equipment to ensure that product performance meets standard requirements.

3. Power grid company operation and maintenance detection: Power grid companies can purchase this platform for regular operation and maintenance detection of grid-connected new energy power generation equipment to promptly discover and deal with potential safety hazards.

In summary, Qingdao Sunwin Technologies Co., Ltd. has broad application prospects and important technical value in the new energy industry with its innovative technical solutions and high-quality product services. It not only improves the testing efficiency and accuracy of new energy power generation equipment, but also provides a strong guarantee for the safe and stable development of the new energy industry, and plays an important role in promoting the high-quality development of the new energy industry.

In the future, with the continuous increase in the installed capacity of new energy, the demand for detection platforms will continue to grow. Not only in large-scale centralized power generation projects, but also distributed energy systems and microgrids need such detection platforms to ensure safe and stable operation. Sunwin will continue to be committed to providing customers with more efficient and reliable testing and verification services, and jointly promote the healthy development of the new energy industry.