【作者】 李洪生；

【导师】 黄彦全；

【作者基本信息】 西南交通大学 ， 电力系统及其自动化， 2005， 硕士

【摘要】 随着我国社会主义市场经济体制的建立和电力工业体制的改革,电网的商业化运营己成为迫切需要解决的重要课题。在引入竞争机制、建立电力市场之后,电力系统网损分析计算成为倍受关注焦点。目前,网损分析计算方法很多,一般都是采用确定性的计算方法,而实际电力系统中,节点注入功率的预测会有偏差,在运行中也会有随机波动;此外,网络元件也会发生偶尔事故而退出运行,这就造成了原始数据的随机性,从而使得计算结果也带有不确定性。从这一问题出发,本论文讨论比较现有的网损分析计算方法和概率潮流计算方法,每种方法各有其适用范围,但也都存在不足之处。 在输电网开放以后,输电服务在输电成本计算和输电成本定价方面都发生了显著的变化,解决有功无功网损分摊问题对于分析输电服务具有重要的价值。本文在比例共享原则的基础上,首先实现有损网络到无损网络的变换,继而详细介绍潮流跟踪的两种实现形式,即逆流跟踪形式和顺流跟踪形式。通过这两种算法,可以得到各个发电厂或者负荷对电网内所有输电设备的利用份额,并可以确定每一笔交易或转运业务所经电网路径以及在所有业务中的份额。因为损耗的处理是逆流追踪和顺流追踪的难题之一,而电流无损耗,所以有人提出用电流进行潮流跟踪。 在网损分摊方面,本文在已有的网损分摊方法基础上,利用网络的阻抗矩阵和潮流解,提出一种简单透明的网损分摊方法,并在具体算例上进行分析。此种方法作了适当的假设,公式简单,易于理解并为用户所接受。更多还原

【Abstract】 With establishment of socialist market economy system and innovation of electric power Industry system, commercialization operation of power system is an important subject that need be resolved urgently. After drawing into competitive system and establishing electric power market, Power system loss analysis and calculation has been paid much attention to all through. At present, there are various of Power loss analysis and calculation methods, but most of them are deterministic methods, however, in practical power system, forecast of power injection at buses is uncertainty and random fluctuation; in addition, power system components emerge also some occasional accidents and exit operation, which lead to stochastic of original data and uncertainty of calculation value. Departing from above problems, this paper compares existing methods of power loss calculation and probabilistic power flow calculation, each method has its application area, but it also exists some disadvantages.After power transmission network open, power transmission cost computation and power transmission cost price have evident change in transmission service, and it is important value that active power and reactive power losses are solved in power transmission service’ s analysis. Based on proportion sharing principle, at first, a transformation is achieved from loss network to lossless network, consequently, a novel complex tracing method for power transmission is developed in this paper, the upstream tracing method and downstream tracing method are discussed in detail. By the two algorithm, holding portion of every power station or load can be got in all the transmission device of power system, the path and portion of every transaction or wheeling service can be determined. Handling of loss is one of most difficult problems for the upstream tracing method and更多还原