综合负荷动静比例对电网传输功率的影响分析

Influence analysis of the static and dynamic proportion of synthetic load on grid transmission capacity

电力系统仿真计算中,综合负荷的动态和静态成分所占比例对电网的暂态极限有着重要的影响。文章根据湖南电网的实际特点和电网结构以及运行情况,研究了综合负荷模型中不同感应电动机比例对湖南电网南北断面南送功率传输极限的影响,分析了综合负荷模型与恒阻抗加恒功率的静态负荷模型应用于湖南电网对断面南送功率极限的不同影响,并在此基础上分析了综合负荷模型和参数变化对电力系统稳定水平影响的机理,最后对湖南电网负荷模型和参数的选取提出了建议。

The proportion of dynamic and static components of synthetic load is critical to the electrical grid transition limit in simulation calculation of electrical power systems.In accordance with the actual situation of Hunan electrical grid,the influence of the proportion of different inducting motors in synthetic load model on transitional limit of the south line is examined.The effect of the static synthetic load model of the permanent impedance and permanent power applied in the Hunan electrical distribution network on the sectional south-transmitting power limit is analysed.The mechanism in which the synthetic load model and parameter change affect the grid’s stability is studied.Some proposal concerning Hunan electrical grid load model and its parameter selection are proposed.