基于复合控制的交流电子负载研究  

Novel Combined Control for AC Electronic Load

作　　者：李芬[1] 邹旭东[1] 张杰[1] 王成智[1] 陈伟[1] 

机构地区：[1]华中科技大学电气与电子工程学院,湖北武汉430074

出　　处：《电气传动》2008年第10期47-50,共4页Electric Drive

基　　金：湖北省自然科学基金资助项目(2007ABA051)

摘　　要：研究了一种可适用于交流电能装置的各种电特性的测试,同时又将试验电能回馈至电网的交流电子负载。根据其主电路的两级AC/DC/AC变换结构,详细分析了系统功率平衡机理,提出一种新的复合控制方法,较好地满足系统对指令电流跟踪的精度、快速性和稳定性的要求。该方法能消除电压扰动带来的电流跟踪误差,可以实现对单相交流测试电源的阻抗特性精确模拟,同时完成功率因数接近于1的有源逆变将测试电源电能回馈电网。仿真和试验结果证明了复合控制方法的有效性。A kind of AC electronic load based on AC/DC/AC converter for testing of AC power source with energy recycling capability was presented. The active power balance of this AC electronic load was analyzed in detail. Based on the analysis, a novel combined control strategy was put forward, which can meet the require- ments of fast response, accurate tracking ability and control stability. This proposed method can eliminate the steady-state control error caused by tested-power voltage completely, achieve good dynamic and steady performance of simulating the specified impedance and realizing near unity power factor operation. The research is proved to be effective in power recovery by simulation and experiments.

关 键 词：交流电子负载 负载特性 能量回馈 复合控制 

分 类 号：TM461[电气工程—电器]