级联H桥结构谐波与无功发生器设计

Design of cascade H-bridge structure harmonics and var generator

电网谐波治理和无功补偿技术是电力系统中的关键技术,也是伴随着新能源电力电子产品具有高渗透性投入后需要着重考虑的一项技术。文中主要针对谐波治理和无功补偿问题,采用一种基于级联H桥结构的变换器,可以将谐波治理和无功补偿功能集中设计,既可以实现无功电流的控制,又可以产生目标次谐波,通过PSCAD/EMTDC仿真,其结果与设定值或理论值吻合,仿真研究工作证实了该设计在理论上的可行性。

The power grid harmonics management and the reactive power compensation technology are the main technologies in power system,and it's a technology that requires a lot of consideration when the new energy power electronics is highly permeable.This paper mainly aims at that problem of harmonic management and reactive power compensation,a kind of invert based on the cascade H-bridge structure,which can realize the centralized control of the harmonic management and reactive power compensation,thus,the control of the reactive current,as well as the production of the target sub-harmonic can be realized.And the result is matched with the set value or theoretical value by PSCAD/EMTDC simulation,and the simulation research work proves the feasibility of the test system in theory.