边际网损系数法中节点无功功率对电力市场网损分摊的影响  

INFLUENCE OF NODE-INJECTED REACTIVE POWER ON LOSS ALLOCATION IN ELECTRICITY MARKET BY MARGINAL LOSS COEFFICIENT METHOD

作　　者：刘梓洪[1] 程浩忠[1] 刘晓冬[1] 武寒 周坚 杨立兵 赵筠筠 励刚 

机构地区：[1]上海交通大学电气工程系,上海市200030 [2]国电华东公司,上海市200002

出　　处：《电网技术》2004年第3期51-54,共4页Power System Technology

基　　金：高等学校优秀青年教师教学和科研奖励基金资助项目。

摘　　要：边际网损系数法是一种基于微观经济学原理和已知潮流解的网损分摊方法。由于该方法能够提供有效的经济信号,提高经济效益,已成为国外区域电力市场最主要的网损分摊方法之一。但在实际网损分摊中并没有考虑节点无功功率对全网网损的影响,因而没有对节点无功功率进行网损量的分摊。文中介绍了边际网损系数法中节点无功功率对电力市场网损分摊影响的基本模型和算法原理,推导并分析了考虑和不考虑节点无功功率的网损分摊公式。最后,对IEEE-14、30节点系统及某2243节点实际系统峰荷、腰荷和谷荷三种典型运行方式进行了计算和分析。结果表明,随着系统的增大,节点无功功率对网损分摊的影响有增大的趋势。因而,在较大的系统中应用边际网损系数法时,忽略节点无功功率对网损分摊的影响将会使网损分摊结果有较大的误差,并且据此说明了在网损分摊中计及节点无功功率的重要性和必要性。Marginal loss coefficient method is a loss allocation method based on the principle of microeconomics and the assigned power flow solutions. It is one of the most typical and prospective methods to allocate transmission losses in regional electricity market because it can give correct economic signals and improve economic results. However, the effect of node-injected reactive power and the allocation of the losses caused by node-injected reactive power are not considered in most practical methods. For this reason, the basic principle and mathematical model of marginal loss coefficient method considering the influence of node-injected reactive power on the allocation of losses in electricity market is presented, and the loss allocation formulae in which whether the node-injected reactive power is considered or not are deduced and analyzed. The results of simulations of IEEE 14-bus, 30-bus system and the simulation of the peak-, middle- and valley-loads in a certain practical 2243-bus system show that the effects of node-injected reactive power increase along with the enlargement of power system scale. In conclusion, the ignoring of node-injected reactive power may result in the comparative error of loss allocation, especially for large scale power system. Thus, the importance and necessity of considering the effects of node-injected reactive on loss allocation are explained.

关 键 词：边际网损系数法 无功功率 电力市场 网损分摊方法 输电系统 输电网 

分 类 号：TM731[电气工程—电力系统及自动化]