直流输电系统交流侧的有源滤波技术

Active Filter Technique on AC-side of HVDC Transmission Systems

对高压直流输电系统交流侧产生的谐波进行分析,并针对高压直流输电系统交流侧产生的谐波的特点提出了一种并联有源滤波方案,该有源滤波器采用瞬时无功功率理论进行谐波检测,通过PI控制维持电容电压的稳定,采用高频载波PWM脉宽调制技术使实际输出电流信号跟踪指令电流信号.最后对该有源滤波方案进行了动态模拟仿真,仿真结果表明,该有源滤波方案对高压直流输电系统直流侧产生的谐波的滤除是非常有效的,能够得到理想的结果.

The harmonics in HVDC converter station analysed, a shunt active filter is presented. The shunt active filter detects the harmonics using instantaneous reactive power theory, keeps constant capacitor voltage by PI control algorithms, and keeps output current tracing the ideal current by utilizing the high-frequency carrier PWM modulation technique. The MATLAB simulation of the active filter scheme is carried out. The simulation results demonstrate the effectiveness of the active filter technique on AC side of HVDC converter station.