配电网合环冲击电流的暂态过程分析与仿真

在进行配电网合环操作分析时,以往只考虑合环后稳态电流是否越限,而忽略了合环冲击电流的暂态过程。针对这一不足,在理论分析的基础上,结合配电网特点建立了数学模型,推导出了合环冲击电流的计算方法,并探讨了影响合环冲击电流的主要因素。最后利用PSCAD/EMTDC软件对实际算例进行了暂态仿真计算。计算和仿真波形结果验证了该方法的正确性和有效性,对实际电网的调度运行具有一定的指导意义。

Transient analysis and simulation of surge current due to closing loop in distribution network

Aiming at the shortcoming in closing loop operation analysis,which focused on the steady-state current and ignored the transient process of surge current,the mathematics model was established and calculation method was proposed for surge current based on theoretical analysis.Furthermore,the influencing factors determining the loop current were discussed.Actual examples and transient simulation results verify the correctness and validity of the proposed method,which could provide significant reference to the distribution network operation and dispatching.