一种基于超级电容储能的新型交流电压动态调节器

提出了一种新型单相交流电压动态调节器方案,采用双半桥变换电路分别进行串联电压补偿和直流储能调节。其中超级电容组在公共直流侧的使用不仅保证了补偿电压凹陷和严重跌落所需能量,而且显著降低了储能调节变换器的启动次数和工作时间。根据不同的能量平衡方式,分析了该调节器的多模式运行方式以及串联电压补偿和直流储能控制规则。最后5kVA样机的实验结果表明所提出的方案在动态电压恢复和谐波抑制方面具有良好表现。

A Novel Dynamic AC Voltage Regulator Based on Super capacitor Storage

A novel single-phase dynamic AC voltage regulator is proposed. The regulator employs the double half-bridgeconverter circuits to perform series voltage compensation and DC energy regulation respectively. Moreover, the implementation of super-capacitor banks at common DC side ensures the energy for compensating voltage sags and severe drops, and efficiently reduces the actions of storage regulating converter as well. According to different patterns of energy balance, the multi-mode operation principles, series voltage compensation strategies and energy storage control rules for the regulator are investigated. Experimental results obtained from a 5 kVA prototype indicate that it has good performances in dynamic voltage restore and voltage harmonic suppression.