【摘要】 为实现较好的滤波效果,确保系统安全稳定运行,针对大功率混合型有源电力滤波器的补偿电流是通过控制逆变器的输出电压来产生适当输出电流的情况,在考虑有源滤波器的输出滤波器的基础上,利用开关函数法建立了大功率混合型有源电力滤波器的数学模型,为将电流参考信号转化为电压参考信号进行控制提供理论依据。实验仿真和工程应用都表明根据系统数学模型所设计有源滤波器的控制器能达到较好的滤波效果。更多还原

【Abstract】 LC single tuned passive power filter has some intrinsic shortcomings in filtering performance,Active power filter application on harmonic suppression and reactive power compensation has made great development,however,an important drawback of active power filter is its high rating and so-caused high cost,which restricts the application of active power filter.Generally,the rating of active power filter is about 1/3 of the load rating when only used for compensating harmonics and will be much bigger when used to compensate reactive power simultaneously.Many hybrid active power filter have been proposed in the literature.It combines passive power filter and active power filter in series and parallel.The current compensation of high-power hybrid active power filter(HHAPF) is controlled by the output voltage of converter.Considering the output filter of APF,this paper used the switch function method and established the high-power hybrid APF mathematical model,which provided theoretical basis for transforming current reference signal into voltage reference signal.The experimental simulation and the project application all indicated the APF controller based on the system mathematical model designs could achieve the good filtering effect.更多还原