含多电压源型变换器型电力电子设备的互联电网广域阻尼控制

Wide area damping control strategy for interarea power grid contains multi-voltage-source converters power electronics equipment

随着众多电压源型变换器型电力电子设备接入电力系统的渗透比逐步增加,形成了含多变流器的电力电子化互联电网.本文针对多电压源型变换器型变流器的无功调制特点,利用多变流器无功调制能力设计广域阻尼控制策略,为互联电网提供阻尼并抑制低频振荡.首先,对多电压源型变换器型变流器控制环节构成进行介绍,研究并构建了多电压源型变换器型变流器通用性模型;其次,分析了多变流器无功调制阻尼贡献机理;最后提出多变流器广域阻尼控制策略,利用多电压源型变换器型变流器无功环节的模糊控制来对互联电网功率振荡进行抑制.通过构建多电压源型变换器型变流器算例仿真,结果表明,该方法可为系统提供阻尼,有效抑制区域间振荡,增强电力系统的稳定性.

With the increasing penetration ratio of many voltage-source converter (VSC) power electronic equipment into the power system, interconnected power grid made up of many converters is gradually formed. As to the characteristics of reactive coordinated modulation using multi-voltagesource converters, reactive coordinated ability of multi-converters are used to design the wide-area damping control strategy in this paper. And it provides damp for system and reduce power oscillation. Firstly, control links of the multi-voltage-source converters are introduced, and the multi-voltage-source converters versatility model are researched and constructed. Secondly, the multi-converters reactive modulation damping contribution mechanism are analyzed. Finally, power oscillation of interconnected power grid are supplied for wide-area damping using fuzzy control of reactive power link of multi-voltage-source converters. By simulation example of multi-voltage-source converters, simulation results shows that the method can provide damping for the system, effectively suppress inter-regional oscillations, and enhance the stability of the power system.