采用二重化技术实现的谐波电压源研制

提出了一种新型的适用于大功率高性能可编程谐波电压源的实现方案，该方案采用串联型的主电路结构，利用输出电压闭环和滤波电容电流内环的控制策略，结合单相全桥的二重化技术，使谐波源有高品质的输出电压波形。分析了该谐波电压源的特性。实验表明，该系统具有良好的静态性能和动态性能。按该控制方案完成了一台300kVA实验装置的研制．该装置输出的电压波形能够满足相关设备测试需求，同时能够模拟电网中的电压跌落、电压波动等现象，为相关的大功率电力设备提供了较全面的电压测试。

Study of Harmonic Voltage Source with Dual PWM Controller

This paper presents a novel scheme to develop a large-volume high-performance programmable harmonic voltage source, in which a series construction of main-circuit is used.The output waveform has a high performance with dual PWM control and a multiple feedback loop.The stability and precision of the system are analyzed in this paper.The excellent static performance and fast dynamic response are proved by experiment.On the basis of this scheme,a 300kVA experimental plat has developed successfully, the output of which can supply an excellent harmonic voltage to the tested equipments.Simultaneously,this plat can simulate the voltage sags and voltage fluctuation to the tested equipments for a comprehensive voltage test.