Chain SVG, also known as static var generator, is a device that uses a bridge converter composed of fully controlled power electronic devices to perform reactive power compensation. It has been widely used in wind power generation, photovoltaic power generation and other renewable energy field stations. At present, SVG has become an indispensable equipment in wind farms, photovoltaic power stations and other renewable energy stations, but also nowadays renewable energy station testing must be tested, in each renewable energy testing organisations are using semi-physical simulation platform for testing. However, SVG systems usually have high voltage level, large power capacity, many cascaded sub-modules, many switches, etc. Based on the characteristics of the physical platform, the testing cost is high, the cycle time is long, the risk factor is high, and the project is complicated.