虚拟同步发电机暂态稳定协同控制

Transient stability synergetic control of virtual synchronous generator

虚拟同步发电机(VSG)技术能够为可再生能源的接入提供惯性和阻尼,实现可再生能源的友好入网,改善系统稳定性,但受容量限制,VSG暂态稳定性面临着严峻的挑战。为此,分析VSG无功参考值对其暂态稳定性的影响,在此基础上,基于协同控制理论提出以虚拟功角和频率为宏变量的VSG暂态稳定协同控制策略。不同情况下的算例验证了所提VSG暂态稳定协同控制策略的正确性和有效性。

The VSG(Virtual Synchronous Generator)technology can provide inertia and damping for the access of renewable energy to realize its friendly integration and improve the system stability. However,the transient stability of VSG is facing severe challenges due to capacity constraints. Therefore,the impact of reactive power reference value of VSG on its transient stability is analyzed. On this basis,a transient stability synergetic control strategy for VSG is proposed based on synergetic control theory,which takes the virtual power angle and frequency as its macro variables. The correctness and validity of the proposed strategy is verified by cases under different situations.