摘要
提出了一种基于优化电压矢量的有源滤波器定频滞环电流控制新方法。该方法用一组滞环比较器判定参考电压矢量所在区域 ,并据此选择适当的两相开关独立地用定频滞环控制技术控制相应的相间电流 ,以实现良好的电流跟踪。这一方法的主要特点是无需估计系统阻抗参数即可用优化电压矢量实现定频滞环控制 ,因此既具有较高的直流电压利用率和较高的控制精度 ,又保持了稳定的开关频率 ,从而有效地提高了有源滤波器的综合性能。计算机仿真结果表明了本方法的有效性。
In this paper a novel hysteresis current control method based on quasi optimized space voltage vectors for Active Power Filters (APF) with constant switching frequency is proposed. The location region of reference voltage vector is detected by a set of hysteresis comparators. Two appropriate switches are then selected to control the two corresponding inter phase currents independently. This method is characterized by constant switching frequency without estimating the parameter of the system, the high utilizing rate of DC voltage and good control accuracy. The comprehensive performance of APF is improved noticeably which is verified by computer simulation results.
出处
《电网技术》
EI
CSCD
北大核心
2000年第6期1-8,共8页
Power System Technology
关键词
有源滤波器
滞环电流控制
电力系统
无功补偿
Active Power Filters (APF)
power system harmonics
power quality, hysteresis current control
voltage space vector
