采用CDSC滤波实现网侧有功电流前馈的APF无谐波检测控制

发布时间：2018-01-04 21:43

本文关键词：采用CDSC滤波实现网侧有功电流前馈的APF无谐波检测控制　出处：《电网技术》2017年09期 　论文类型：期刊论文

【摘要】：用无谐波检测法控制有源电力滤波器(active power filter,APF)省去了谐波检测环节,减少了计算量,但传统的无谐波检测法存在APF直流电压随负荷变化而波动严重的缺点。为此,该文基于对传统无谐波检测法直流电压波动机理的分析,提出利用网侧正序有功电流前馈来提高无谐波检测法下APF直流电压的动态响应特性,从而抑制直流电压波动的改进方案。为简化该方案在静止坐标系下的实现,选用并设计了级联延迟信号对消(cascaded delayed signal cancellation,CDSC)滤波器来获取基波正序电流信号。由于稳态的网侧电流与电压相位相同,据此设计了有功逼近算法代替传统有功电流计算方法。仿真和实验验证了改进方案的有效性。与传统无谐波检测法相比,改进方案加快了直流电压恢复速度,提高了负荷电流波动时直流电压稳定性,降低了APF损耗和网侧电流不平衡度。
[Abstract]:With no harmonic detection of active power filter control method (active power filter, APF) eliminates the harmonic detection, reduce the amount of computation, but the traditional non harmonic detection method of APF DC voltage with load changes serious shortcoming. Therefore, the analysis of the traditional harmonic detection method based on the mechanism of DC voltage fluctuation the network side, to improve the positive sequence active current feedforward harmonic detection under DC voltage APF dynamic response characteristics, improvement scheme to suppress DC voltage fluctuation. In order to simplify the program in static coordinates are selected, and the design of the cascaded delayed signal cancellation (cascaded delayed signal cancellation, CDSC) filter to obtain the fundamental positive sequence current signal. Because of the net side current and voltage phase steady same, according to the design of the active approximation calculation method instead of the traditional algorithm of active current simulation. The effectiveness of the improved scheme is verified by experiments. Compared with the traditional harmonic free detection method, the improved scheme speeds up the DC voltage recovery, improves the DC voltage stability when the load current fluctuates, and reduces the APF loss and the network side current imbalance.

【作者单位】：电力系统运行与控制山西省重点实验室(太原理工大学);
【基金】：山西省煤基重点科技攻关项目(MD2014-06) 山西省回国留学人员科研资助项目(2015-重点1) 国家自然科学基金项目(U1610121)~~
【分类号】：TM761;TM935
【正文快照】： Natural Science Foundation of China(NSFC)(U1610121).filter,APF)省去了谐波检测环节,减少了计算量,但传统的无谐波检测法存在APF直流电压随负荷变化而波动严重的缺点。为此,该文基于对传统无谐波检测法直流电压波动机理的分析,提出利用网侧正序有功电流前馈来提高无谐波检

【相似文献】