摘要
高电压等级电力系统中,大容量有源电力滤波器的谐波抑制性能主要受主电路开关器件耐压水平和工作频率的限制。提出一种由有源级联多电平逆变器和无源单调谐滤波器构成的混合型有源电力滤波器主电路拓扑结构以及该混合型装置主要参数的设计方法。由于无源滤波器的存在,稳态运行时,可以大幅降低有源部分的容量和耐压水平,同时分析了该混合型装置绝大多数基波电压由无源部分承担的原因。此外,有源部分级联结构的应用可以降低单个开关器件的耐压水平,获得较高的等效输出频率。对级联混合型有源电力滤波器主电路及其控制系统进行仿真,仿真结果验证了所提方案的特点以及良好的补偿效果。
In the high-voltage level power system, the harmonic suppression performance of large capacity active power filter （APF） is limited mainly by the voltage withstand level and the operation frequency of switching device. The main circuit and its calculation method for key parameters of hybrid APF （ HAPF）, which consists of cascade multi- level converter and single-tuned passive filters, are proposed in this paper. The capacity and voltage withstand level of active parts in this circuit can be largely reduced due to the passive filter in the steady state. And the reasons why the fundamental voltage of hybrid device is undertaken by the passive part are analyzed in detail in this paper. In addi- tion, the cascade structure of active part can effectively reduce the voltage withstand level of single switching device and obtain higher equivalent output frequency. The main circuit and control system of the cascade hybrid active power filter are researched by simulation and the results of which validates the characteristics and good compensation per- formanee of the scheme proposed in this paper.
出处
《电测与仪表》
北大核心
2013年第1期71-77,共7页
Electrical Measurement & Instrumentation
