摘要
滞环电流控制是三相四线有源电力滤波器(APF)常用的电流控制方法,但在三相三线APF中应用不够成熟。分析了三相三线APF滞环电流控制策略的原理及可行性,给出了滞环控制中关键参数的设计和选择方法。通过对开关模态及三相电流关系的分析,推导出了三相三线APF直流侧电压选择的理论参考公式。在此基础上提出一种基于双数字信号处理器的APF数字滞环电流控制方法,实现了全数字化三相三线APF的滞环电流控制,实验结果证明了该方法的有效性。
Hysteretic current control technique is commonly used in the three-phase four-wire active power filter （APF）. However, it has not been applied in three-phase three-wire APF very well. The principles and feasibility of hysteretic current control strategy in three-phase three-wire APF are analyzed in this paper, and the design method of the critical parameters is also discussed. By analyzing the switching states and the relationship of three-phase currents, the theoretic referenced formula of DC-link voltage in three-phase three-wire APF is deduced. In addition, a novel dual-DSP-hased digital hysteretic current control scheme for APFs is presented and the full-digital hysteretic current control for three-phase three-wire APF is achieved. Experimental results demonstrate the validity of the control strategy proposed.
出处
《电力系统自动化》
EI
CSCD
北大核心
2007年第18期57-60,76,共5页
Automation of Electric Power Systems
