基于功率解耦控制的虚拟同步发电机功率振荡抑制策略

针对并网模式下虚拟同步发电机（VSG）因阻感性线路造成功率耦合加剧功率振荡的问题，提出一种基于功率解耦控制的虚拟同步发电机功率振荡抑制策略。首先分析了功率耦合及加剧振荡的机理，其次提出可抵消物理线路功率耦合特性的前馈功率解耦策略，该控制策略可独立调节有功和无功功率，减弱因其交互影响而加剧功率振荡的问题，摆脱了依赖“功率角为零”假设才实现的近似解耦方法。最后，搭建仿真模型验证所提控制策略的有效性及合理性。

Power Oscillation Suppression Strategy of Virtual Synchronous Generator Based on Power Decoupling Control

Aiming at the problem that the power coupling caused by the inductive line of the Virtual Synchronous Generator （VSG） in the grid-connected mode exacerbates the power oscillation，a power oscillation suppression strategy is proposed based on the power decoupling control. Firstly，the power coupling and the mechanism of aggravating the oscillation are analyzed， and then a feedforward power decoupling strategy which can offset the power coupling characteristics of the physical line is proposed. This control strategy can independently adjust the active and reactive power， solve the problem that the interaction affects the oscillation， avert an approximate decoupling realization method which is based on the assumption that the power angle is zero. Finally，a simulation model is established to verify the effectiveness and rationality of the proposed control strategy.