Mechanism and countermeasures of reactive power circulation of paralleled SVGs located at T-connected renewable energy stations

With the increasing penetration of wind power, the application of SVG can meet the needs of reactive power compensation in new energy stations, but the parallel operation of multiple SVGs will bring about the problem of reactive power circulation. The problem of reactive power circulation will lead to the frequent occurrence of SVG overheating accidents and increase the power loss, which will cause huge economic losses. Taking the parallel operation of SVGs between T-connected new energy stations as the research scene, this paper proposes a research method of reactive power circulation mechanism between SVGs, and puts forward the conditions for reactive power circulation between SVGs, and puts forward the suppression measures to suppress the reactive power circulation. Finally, the critical conditions for the occurrence of reactive power circulation are verified by simulation in DSL. The simulation results show the correctness of the proposed mechanism and the effectiveness of the suppression measures.