一种三相电力电子负载的电流控制方法  

A Novel Current Control Method for Three-phase Power Electronics Load

作　　者：吴振兴[1] 王翔[2] 邹旭东[1] 黄清军[1] 邹云屏[1] 

机构地区：[1]电力安全与高效湖北省重点实验室(华中科技大学),湖北省武汉市430074 [2]湖南省电力公司,湖南省长沙市410007

出　　处：《中国电机工程学报》2010年第30期7-14,共8页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50977036);湖北省自然科学基金项目(2007ABA051)~~

摘　　要：电力电子模拟负载(power electronics load,PEL)是一种绿色节能的试验装置。为了获得较好的跟踪特性,对传统的谐振控制器进行超前校正,在‘s’域中设计了控制器参数,使得电流环具有合适的带宽和相角裕度。采用状态观测器对控制的滞后一拍进行补偿,改善了电流环的稳定性,并且加入重复控制器大大减小了周期性的观测误差。仿真及实验结果表明,PEL具有较小的稳态误差以及较好的动态性能,对输入电压不对称及畸变导致的影响亦具有较强的抑制能力。Power electronics load （PEL） is a green and energy-saving experiment device.In order to achieve more excellent performance,the improved resonant controller with leading correction was adopted as the controller of the current loop.Then in the ‘s’ domain,the parameters of the controller were designed to maintain the appropriate bandwidth and phase margin of the current loop.A state observer was applied for eliminating the effect of the one-step-delay control;and according to the repetitive compensation,the periodic observation error was greatly reduced.Simulation and experiment results showed that the PEL has the advantage of less steady-state error and better dynamic response.At the same time,it possesses a strong ability against the unbalance and distortion of supply voltage.

关 键 词：电力电子负载 谐振控制器 超前校正 状态观测器 重复补偿 

分 类 号：TM46[电气工程—电器]