10kV系统动态电压恢复器的仿真研究

Study of Dynamic Voltage Restorer in 10 kV Grid

动态电压恢复器作为一种新型电能质量调节设备，它能够快速而有效地有效抑制电网电压波动，保护了敏感负载。文章针对10kV系统中的动态电压恢复器进行了仿真分析，利用移相式整流变压器从备用10kV电网获取能量，同时保证电流无谐波。级联式多电平逆变器使用载波移相调制技术串联接入电网，经过仿真分析发现，在电压跌落时刻，动态电压恢复器能及时补偿电压，保证负载电压的稳定。

Dynamic voltage restorer is a new power electronic controller that can restrain the undulation of the grid voltage to protect sensitive loads. The paper simulates the application of dynamic voltage restorer in lOkV system. In the model, dynamic voltage restorer get the power with the shifting transformer from the backup lOkV line. The current of the shifting transformer is sin - wave without any harmonic. The cascaded multi - level inverter connects into the grid using carrier phase - shift PWM techniques. When the voltage sags, dynamic voltage restorer can compensator to the load immediately, assure the stability of the voltage of load.