检测电流包含电容电流的SAPF谐波抑制和谐振阻尼新方法

发布时间：2018-01-07 18:20

本文关键词：检测电流包含电容电流的SAPF谐波抑制和谐振阻尼新方法　出处：《电工技术学报》2017年S1期 　论文类型：期刊论文

【摘要】：研究一个由并联型有源电力滤波器(SAPF)和并联电容器组成的混合补偿系统,其中并联电容器的容性阻抗会与配电网的感性阻抗发生并联谐振。当检测电流中不包含电容电流时,SAPF可以抑制谐波和阻尼谐振且系统稳定;当检测电流中包含电容电流时,SAPF采用传统方式补偿会使得系统谐振频率向高频漂移。针对SAPF检测电流包含电容电流情况,提出一种改进的控制方法。该方法基于谐波电流分频控制策略,将高于谐振频率的抑制电流指令取反,低于谐振频率的抑制电流指令保持不变,同时检测谐振频率附近的公共耦合点(PCC)电压构建虚拟阻尼电阻,并对虚拟电阻的电导值进行闭环调节。采用该方法补偿后的网侧电流和PCC电压均满足电能质量标准。最后进行了仿真和实验验证。
[Abstract]:A study by the shunt active power filter (SAPF) hybrid compensation system and capacitors connected in parallel, the parallel capacitor capacitive impedance and inductive impedance distribution network parallel resonance. When the capacitor current does not include current detection, SAPF can suppress the harmonic wave and damping resonance and the stability of the system; when including capacitance current detection current in SAPF, using the traditional way of compensation will make the system resonant frequency to high frequency drift. According to the SAPF detection current contains the capacitor current situation, this paper proposes an improved control method. This method is based on the harmonic current frequency control strategy, suppression of the current instruction will be higher than the resonant frequency of the inversion, below the current command resonance suppression the frequency remained unchanged, at the same time to detect the point of common coupling near resonant frequency (PCC) voltage virtual damping resistor and conductance on the virtual resistance value closed-loop regulation The network side current and PCC voltage compensated by this method meet the standard of power quality. Finally, the simulation and experimental verification are carried out.

【作者单位】：强电磁工程与新技术国家重点实验室(华中科技大学电气与电子工程学院);国家电网公司华中分部;
【基金】：国家自然科学基金资助项目(51277086)
【分类号】：TM761;TM935
【正文快照】： 0引言随着电力电子装置的应用日益广泛,各类非线性负载的大量应用,造成配电系统中的谐波污染严重[1]。同时为了起到改善功率因数和电压支撑的作用,我国在低压配电系统中广泛装设并联电容器,但是网侧感性阻抗和电容器容性阻抗会形成谐振网络。如果非线性负载的交流侧包含有谐振

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