【作者】 徐苏晨；

【导师】 张勇传； 张士军；

【作者基本信息】 华中科技大学 ， 水利水电工程， 2004， 硕士

【摘要】 近十几年来,电力工业正经历着一场全球范围的结构重组——在电力工业中引入竞争机制,形成电力市场。输电网作为发电市场和用电市场的连接方,需要为发电方提供一个公平的竞争环境,在这里面价格作为电力市场中的支点,起着主导作用。输电价格的制定更是电力市场研究的热点和难点之一。本文首先简要介绍了电力市场的定义、基本运营原则和模式,讨论了国内外电力市场的发展状况;并在分析了输电市场的特点及其转运业务形成的基础上,提出制定输电电价重要性。然后在输电定价的研究过程中,针对输电市场的特点,论文将这个问题分为两个层次的问题进行分析。第一个层次的问题是输电费用的组成与计算;第二个层次的问题是输电费用在各个电网用户之间的分摊。对于第二个问题,论文将潮流跟踪法和改进的潮流跟踪法进行了算例分析比较,得出改进的跟踪潮流方法能解决轻载线路的固定成本回收的问题的结论。接着本文给出了一种新的输电费用分摊方法——节点混合法,从理论证明到算例比较,论文得出这样一个结论:节点混合法与潮流跟踪法是等效的,但是节点混合方法要比潮流跟踪法计算简单明了的多。在网损的分摊研究上,论文针对因各个节点功率的变化而引起的网损变化量,提出了一种边际网损系数法进行网损分摊,并给出了算例。这种方法能指导电网用户根据网损调节系数的大小与正负,进行负荷和发电调整。输电系统中的传输阻塞的是一个很复杂的问题。因为传输阻塞管理与电力市场的交易模式有关,论文分析了电力市场中三种主要的交易模式,简要讨论了阻塞管理的措施。在传输阻塞定价的问题上,本文提出了一种基于机组成本曲线的最优潮流模型,并进行了简化的算例分析。接着,论文给出了一种综合考虑输电网络固定成本、线路网损费和阻塞费用的输电定价模型和算例,并分析了阻塞费用对输电费用的影响。最后,论文采用周转基金法对输电网的收支平衡问题进行了分析,分析表明这一方法在实际应用中是切实可行的。更多还原

【Abstract】 The electric power industry has being experiencing a global reconstruction- to introduce competition mechanism and develop power market. Transmission network, which serves as the connection between the generation-side market and demand-side market, calls for a fair competing circumstances, in which price plays the dominant role as the fulcrum of power market. The price for transmission has become one of the hottest and toughest issue in the research of power market.The thesis first introduces the definition, fundamental operation criterion and mode of power market, discusses the developing condition of power market, and, based upon the analysis of the characteristic and the formation of wheeling, puts forward the importance of transmission pricing.When come to the question of transmission pricing, we view it as a two-level issue: the upper level is to determine the transmission price of a certain line on the basis of cost analysis; the lower level is to allocate the transmission line price to end-users/generators fairly and quickly. To the lower level, various methods of allocating line price are introduced. Furthermore a new method called bus-mixed average method has been proposed in this paper. A comparison and analysis on these methods are presented to prove that bus-mixed average method is more simple and efficient than the flow tracking allocating method.Then the paper aim at the problem of loss cost allocation, puts forward a computing model based upon the Loss Coefficient Method and analyses the computing case. This method can lead end-users/generators adjusting their load/quantity to decrease the loss.On the hand of emphasize on the research of the fee for network congestion, the paper firstly a review on the transaction mode of power market and the measures for managing congestion is presented. And then, premised upon the pool model, a unit cost curve based OPF and a case study with data on computing the congestion cost are <WP=5>provided. Finally a marginal cost based pricing model for transmission is put forward, besides, the loss and congestion of network are taken into account. And a case analysis is presented as well. Finally we makes a conclusion to the thesis and points out the possible problems and directions for further research.更多还原