王树东,杜巍,王焕宇,林莉,陈维铅,高翔.基于改进非线性下垂控制的微电网并/离网切换技术研究[J].电测与仪表,2018,55(16):112-118. Wang Shudong,Du Wei,Wang Huanyu,Lin Li,Chen Weiqian,Gao Xiang.Study of microgrid parallel / off switching technique based on improved nonlinear droop control[J].Electrical Measurement & Instrumentation,2018,55(16):112-118.
基于改进非线性下垂控制的微电网并/离网切换技术研究
Study of microgrid parallel / off switching technique based on improved nonlinear droop control
In the dual mode parallel / off network, the current distortion is caused by the abrupt change of the control command, and adverse effects on the power grid. However conventional droop control, although double mode problems are avoided, but it is a differential adjustment, also can produce a certain power fluctuations, affecting the stability of the grid. Therefore, based on the analysis of the above problems, this paper proposes an improved parallel / off line single mode switching control strategy, that is the output voltage amplitude, frequency and power of the inverter are pre synchronized before switching, in the switching process, the improved nonlinear droop curve is used to control. A smooth hand off from the network is achieved. The simulation results verify the feasibility of the proposed method.
