广义有源电力滤波器指令电流检测的广义谐波理论法

Generalized Harmonic Theory Method for Detection of Referential Current of Generalized Active Power Filter

谐波抑制是建设高电能质量电网的重要措施之一。针对电网中谐波危害问题,首先,在传统谐波理论的基础上,对其理论进行进一步拓展,发展了广义谐波理论,并详细阐述了广义谐波电流的基本理论及广义谐波电流检测的实现过程;然后,分析了广义有源电力滤波器以广义谐波电流作为指令电流信号实现电能质量综合补偿的必要性和有效性,设计出广义谐波电流检测电路的硬件电路和软件系统;最后,基于广义谐波理论进行了广义有源电力滤波器指令电流检测的仿真和实验。仿真和实验结果表明,该检测算法能够实现实时无原理误差检测广义谐波电流,具有准确度高、实时性好、算法简单及硬件实现方便等特点。

Harmonic suppression is one of the important measures to construct the power networks of high power quali- ty. Firstly, according to the harmonic problem of power networks, a generalized harmonic theory is proposed based on further analysis of the traditional harmonic wave theory. Secondly, the basic theory of generalized harmonic current and its detection process are elaborated. Then, the analysis the necessity and effectiveness of the generalized harmonic cur- rent used as the instruction current signal of generalized active power filter to realize the comprehensive compensation of power quality of power networks. After that, the hardware Circuits and software systems of generalized harmonic cur- rent detections are obtained according to the proposed theory. Finally, the simulative results and experimental results of generalized harmonic current detections based on generalized harmonic theory are given. The theory analysis and simu- lation results show that the proposed method can realize the detecting of generalized harmonic current without principle error in real-time, and it has the advantages of high accuracy, good real-time performance, simple algorithm and con- venient hardware implementation.