有关无功负荷最优分配的一个常用算例的修正

本文讨论了"电力系统分析"课程中有关无功功率最优分配的一个常用算例,指出了目前解析中的问题,并作了修正.由于系统中没有平衡节点来补充线路中的有功损失,确定各发电机的有功出力时需要考虑有功网损的影响.分配无功负荷时应将无功平衡方程、有功平衡方程和等微增率准则建立的方程联立求解.计算结果显示,考虑了线路有功网损之后,能够同时满足有功功率平衡和无功功率平衡,无功负荷的最优分配与有功负荷的分配有关.

Modifications on a Prevailing Instance for the Optimal Distribution of Active Loads

In many textbooks of power system analysis, a power system with two generators and one load is often taken as an example of optimal distribution of active loads. Some problems appear in the solution and modifications are proposed in this paper. Due to the absence of the balance machine, influence of net losses should be considered in determining the real output of the generators. The active loads should be assigned by resolving the equation constructed according to equi-net-losses criteria in conjunction with the active and the real power balance equations. The result shows that, when the net losses are considered, the balance of the real and the active power can be kept, and the optimal assignment of the active power is relevant with the assignment of the real power .