用于高压静止无功补偿器的方波电流源研究

针对高压静止无功补偿器供能电路的特点,提出了一种方波电流源的控制方案,即方波电流源可以在低压侧输出幅值恒定的高频方波电流,采用高压绝缘电缆穿过多个磁环变压器的方式,将能量耦合到高压侧,在二次侧经变换后对高压静止无功补偿器供电.实验表明,采用该方案可获得一个平均值为1A,频率为70 kHz的交变方波电流源,整个电源符合预期设计要求.

Study on square wave current source applied to high voltage SVC

Aiming at the characteristics of power supply circuit of high voltage SVC, this paper proposes the control plan applying square wave current source, a plan which enables square wave current source to output high-frequency square wave current with constant amplitude at low voltage side, and to couple energy at high voltage side by making high voltage insulated cable across several magnetic-ring transformers, and to supply power to high voltage SVC after transformation at the secondary side. The experiment shows that the alternating square wave current source with the average value 1A and the frequency of 70 kHz is acquired by this method, which accords with the expected design requirement of the whole power source.