VSG结合无源型能量路由器及其在微网中的应用

VSG with PBC Energy Router and Its Application in Microgrid

能量路由器可以作为统一接口组织分布式能源和负荷构成能源局域网,但由于电力电子装备无法提供传统同步电网中的惯性、阻尼和功率分配机制,降低了其并网友好性和运行可靠性。提出了一种具备虚拟惯量的能量路由器模型与控制方法,并研究了其组网运行方式,对其交流接口采用虚拟同步发电机(电动机)控制策略替代,对其直流接口采用无源控制(Passivity-based Control,PBC)策略,使能量路由器不仅具备惯性与阻尼特征,同时也可解决直流变换器的恒功率负载问题,并模拟电机特性实现功率调节机制,有助于增强接入电网的稳定性,仿真验证了所提组网方式和控制策略的有效性。

Energy router is one unified interface solution for organizing distributed energy resources and loads to energy local area network. However,power electronic equipment could not provide inertia,damping and power allocation like the traditional synchronous grid which leading the poor grid-tied integrity and reliability. This paper proposes an energy router and its network running mode. The control strategies of AC interface and DC interface are replaced by virtual synchronous generator（ motor） and passivity-based control strategy. So the energy router can mimic the inertia,damping and power allocation characteristics of rotating motor to improve the stability of distributed power network,and the problem caused by constant power loads can also be solved. The simulation proves the effectiveness of the energy router running mode and the control strategy.