基于欧姆定律的电压负荷关系简化模型分析

在电力系统中,存在"用电高峰期系统电压会降低、用电低谷期系统电压会升高"的现象,针对该现象,文章将电力系统的电压与负荷关系简化为n个线性纯电阻并联的等效电路模型,在每个电力负荷线性纯电阻恒定、输电线路达到最大负荷电流两个前提条件满足时,电压与线性纯电阻数量成反比例关系,此关系很好地解释了上述现象,且可用于电力负荷的预测与监视。

In the power system, there exists the phenomenon that the system voltage will decrease during the peak period and increase during the trough period. In this paper, the relationship between voltage and load of power system is simplified as n equivalent circuit models with linear pure resistors in parallel. When the linear pure resistance of each load is constant and the transmission line reaches the maximum load current, the two prerequisite conditions are satisfied. Voltage is inversely proportional to the number of linear pure resistors, which explains the above phenomenon very well and can be used for forecasting and monitoring of electric loads.