摘要
并联型有源电力滤波器能够补偿非线性负载产生的谐波电流、抑制电网电流谐波含量,提高电网的电能质量。现在,并联型有源电力滤波器的变换器几乎均采用PWM(Pulse Width Modulation)控制方式,致使滤波器输出的补偿电流含有变换器开关频率附近的高次谐波,通常可采用在有源电力滤波器的交流侧增设输出滤波器加以抑制。输出滤波器目前大多采用2阶Butterworth低通滤波器,近年来更多是对输出滤波器设计的研究,很少研究输出滤波器对并联型有源电力滤波器性能的影响。提出了并联型有源电力滤波器PAPF(Parallel active power filters)系统输出滤波器的设计方法,分析了输出滤波器对PAPF系统性能影响,通过仿真验证了分析的正确性。
Parallel active power filters （PAPF） are used to eliminate current harmonics produced by loads, and thus reduce the harmonic contents of electrical grids and improve power quality. Generally, the main control circuit of a PAPF system uses Pulse Width Modulation （PWM） and produces harmonics around the switching frequency of the PWM. An output filter （OF） can eliminate these harmonics. The output filters used are usually second-order Butterworth low pass filters （LPF）. Usually, most research focuses on the design of the OF, and it is rare that an analysis of the filter＇s influence is performed. A method for the design of output power filters was proposed, and the influence of the output filter on PAPF system performance was investigated Simulation results have validated the analysis and design of the output filter.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2009年第4期969-972,共4页
Journal of System Simulation
基金
教育部高等学校博士学科点专项科研基金项目(20050359002)
教育部科学技术研究重大项目(306004)
