摘要
针对多通道注入式混合有源电力滤波器(HAPF)无法动态补偿无功功率的问题,在对比两种不同结构多通道注入式HAPF的基础上,提出一种改进多通道注入式HAPF与晶闸管控制电抗器(TCR)联合运行系统,实现中高压配电网谐波与无功的综合动态治理。在提出的谐波电流分频控制方法中,采用改进的ip-iq算法对电网中的各次谐波进行分频检测,各次谐波电流在注入电网过程中产生的相角偏移可在相应的sin-cos函数表中进行校正,直流侧电压实时值与给定值的误差通过PI控制后送入有功通道经d-q变换转化为三相交流值后与谐波电流控制信号叠加形成最终的控制信号。仿真及实验结果证明了所提出的控制方法的有效性。
Multi-branches injection type hybrid active power filter（HAPF） has high current injection ability;however,it can not realize reactive power dynamical compensation.Based on the analysis of two multi-branches injection type HAPF,a combined system of thyristor controlled reactor（TCR） and multi-branches injection type HAPF is proposed to realize harmonic currents dynamical suppression and reactive power dynamical compensation at the same time in high voltage distribution networks.The amplitude or phase of injection current would change after it flowed through the multi-branches injection branch and output filter when conventional multi-branches injection hybrid active power filter was used.Furthermore,in the proposed dividing frequency control method,improved ip-iq method was applied to detect each order harmonic current,and phase error can be corrected by sin-cos chart.Control signal of DC-side voltage was transformed by d-q transformation using the active power channel.The whole signal was composed by the current control and DC-side voltage control signals.Simulation and experiment results have shown the effectiveness of the proposed control methods,and the whole system can meet the demand of major industry to suppress harmonic and compensate reactive power dynamically.
出处
《电机与控制学报》
EI
CSCD
北大核心
2012年第2期32-38,共7页
Electric Machines and Control
基金
国家自然科学基金(60774043)
国家863高技术基金(2008AA05Z211)
国家高技术研究发展计划(863计划)(2012AA050211)
关键词
谐波抑制
无功补偿
分频控制
电流跟踪控制
harmonic suppression
reactive power compensation
dividing frequency control
current tracking control
