混合型有源滤波器新型检测算法研究

Research on New Detection Algorithm of Hybrid Active Power Filter

电网负载不平衡和系统电压发生畸变等情况时,采用传统检测算法易产生延迟等问题。介绍了混合型有源滤波器(HAPF)的拓扑结构,阐述了瞬时无功功率理论ip-iq谐波检测算法的原理,提出了一种新的HAPF谐波检测算法,在ip-iq检测算法的基础上通过设定补偿角来减少数模转换、控制信号等产生的延迟。利用MATLAB仿真软件对新算法进行了仿真,结果表明,新算法具有速度快、延时小等特点,能够满足HAPF谐波检测的需要,具有一定的工业实用价值。

In view of the unbalance of load in power network and the distortion of system voltage,the traditional detection algorithm is easy to produce delay and other problems.The topology of hybrid active power filter(HAPF)is introduced,the principle of instantaneous reactive power theory i p-i q harmonic detection algorithm is expounded.On this basis,a new HAPF harmonic detection algorithm is proposed.The main purpose of this algorithm is to reduce the delay of digital-to-analog conversion and control signal by setting the compensation angle on the basis of the detection algorithm.The load usually consists of 5,7,9 and 11 equal currents.In this paper,the detection principle of harmonic current of 7 loads is analyzed.The new algorithm is simulated by MATLAB simulation software.The simulation results show that the new algorithm has the characteristics of fast speed and small delay,can meet the needs of HAPF harmonic detection,and has a certain industrial practical value.