Research On Progress Current Detection And Control Strategy Of SVG Under Unbalanced Grid Voltage

SVG, which has important dynamic reactive power compensation device, and can run on the basis of real-time requirements of the system parameters and to control the reactive power output polarity and size, reaching the flexibility to dynamically reactive power compensation, effectively improve the quality of power supply, the aim of improving the dynamic stability of the system. For the lack of low-voltage distribution systems and industrial load reactive power compensation device technology. This paper presents a need to detect reactive anti-double-loop direct current power control scheme, this control scheme adaptable, responsive, simple control, high accuracy.Firstly, the principle of reactive power compensation and significance are described in detail, which leads to the development of Static Var Generator proposed design goal of this article. In highlighting the Static Var Generator working principle, the presence of the test results under the three-phase voltage imbalance errors in this improved algorithm defects,devised a high precision, fast response, good direct result of compensation current control optimization.Build a simulation and experimental platform to DSP-based controller designed Static Var Generator hardware and software. The hardware design of the conditioning circuit, power supply circuit, the relay driver and protection circuit, the main circuit and unbalanced loads and other basic circuits.The final simulation and experimental results show that,the response,that based on direct current power control scheme Static Var Generator does not detect reactive rapid, precise, stable and good dynamic performance, improve power quality, with good prospects.