Features: The characteristics of photovoltaic grid connection include low active power on the system's incoming side, where even a small amount of reactive power can lead to a very low power factor. Additionally, reactive power fluctuates significantly, requiring compensation equipment to have extremely high response speed and compensation accuracy.
Project background: The project is a distributed photovoltaic grid-connected power generation system for a CRRC facility in a certain city. A portion of the electricity generated by the power station is consumed locally by the CRRC internally, while the remaining power is fed into the public grid. Since the photovoltaic system was put into operation, the monthly average power factor has been low (below 0.5) and has failed to meet the standards, resulting in accumulated fines of 300,000 RMB over two months. According to data analysis on site, the power factor drops to an extremely low level (as low as 0.01) when the electricity consumption and power generation at the site are roughly equal. That’s the root cause the monthly average power factor to fall short of the required standard. Therefore, the reactive power compensation device is required to achieve high-precision compensation. Ultimately, our company’s 400kvar SVG full cabinet was selected for installation.
After the installation of the SVG, the average power factor exceeded 0.96, demonstrating significant compensation effectiveness, The compensation effect remains highly precise no matter with the system's active power is high or low.
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