不同等值方法对辽宁电网短路电流计算的影响研究

提出了一种新的电网等值思路,即骨干电网等值法,它通过配网向主网等值和主网向骨干电网等值两步来简化处理待等值电网。基于PSD-BPA软件搭建东北-华北地区数据库计算短路电流水平,比较采用不同等值方法研究对辽宁电网主网不同电压层级短路电流的影响。研究了不同等值方法的时间鲁棒性和待等值电网的电气参数分布对本地区电网的影响。

Study on the Influence of Short-circuit Current Calculation for Liaoning P ower Grid by Using Different Grid Equivalent Methods

This paper puts forwards a new idea of network equivalence that is the backbone power grid equivalence. It simplifies the power grid by two steps. Realizing equivalence from the power distribution network to the main electric power network;Realizing equiv?alence from the main electric power network to the backbone power grid. This paper sets up the northeast of China and the north of Chi?na database based on power system simulation software of PSD?BPA to calculate the short?circuit current. This paper also has an influ?ence research on the short?circuit current of the different voltage classes of Liaoning main electric power network by using the different grid equivalent methods. This paper also has a research on the time robustness of the different grid equivalent methods. Electrical pa?rameters influence of the distribution for the equivalent power grid to Liaoning power grid is also studied.