一种新型具有暂升和暂降补偿功能的宽范围动态电压校正器

A Wide Range Dynamic Voltage Corrector for Voltage Swell and Sag

研究了一种新型的宽范围动态电压校正变换器,详细地分析了其工作原理、关键参数设计和控制方案。该动态电压校正器通过对直流母线电压控制拓宽电网电压暂降的校正范围并实现对电网电压暂升的校正。通过采用三电平半桥逆变以及合理设计输出滤波器参数,保证了输出电压波形质量。通过合理的控制参数设计,输出电压具有较好的稳态精度和快速的动态响应。样机实验验证了该动态电压调节器方案的可行性和理论分析的正确性。

A new type of wide range dynamic voltage converter is studied, and the working principle, key parameters design and control scheme are analyzed in detail. The dynamic voltage corrector broadens grid voltage sag correction range and compensates grid voltage swell by controlling the DC bus voltage. With using the three level half bridge inverter and reasonable design of output filter parameters, the corrector can ensure the quality of output voltage. The output voltage has good steady-state accuracy and fast dynamic response by reasonable control parameters design. Prototype experiments verify the feasibility and theoretical analysis of the dynamic voltage regulator scheme.