【毕业论文】基于动态规划法的电力系统经济调度研究.docVIP

PAGE II - - PAGE I 基于动态规划法的电力系统经济调度研究 摘要 随着电力体制的改革深化，已经开始逐步形成了以行政省为单位的区域性电力市场。在全国大区电网互联的背景下，电网要求每台机组的出力都由电网直接控制调度。电力系统经济调度作为现代电力工业最为重要的日常活动之一，其有效解决具有巨大的经济效益和社会效益。本文介绍了国内外的电力系统经济调度发展概况、研究背景以及它在电力行业中的意义。 发电厂在电力市场中通过竞价获得上网电量后，需要在厂内各机组间合理安排生产计划，以便达到最佳的经济效益，这就是电厂的经济调度问题。经济调度主要有两方面，一是经济负荷分配问题，即运行机组间的负荷分配问题，另一个是机组组合问题，又称开停机计划。这两个问题的优化目的都是使发电费用（一般考虑系统消耗的燃料）最小。在本文中主要针对电厂机组负荷经济分配问题，在不考虑损耗和启停机费用的情况下，分析静态的机组负荷优化分配，制定各机组出力方案。 机组负荷分配问题是在满足机组约束和发电备用需求的条件下，确定最小生产成本下各个机组的出力情况。随着电力市场的建立，本着降低电厂发电费用，以低价提供高质服务的出发点，本文引入了简单有效的动态规划算法。通过介绍动态规划的基本理论，包括它的基本概念和基本思路，针对机组不多的情况进行分析，利用动态规划建立数学模型求解。本文还对实例做了解析计算。 为了能够实现动态规划算法在电力系统经济调度中的实际应用，本文使用MATLAB工具对动态规划算法实进行程序设计和计算。并在实际算例中运行程序来验证其有效性，最终确定在发电成本最低情况下各机组的出力情况。 关键词：经济调度，优化，负荷分配，动态规划 Research of Power System Economic Dispatch Based on Dynamic Programming Algorithm Abstract With the continued reformation of power systems, electricity market based on provinces has come to being. Under the background of national district electrical power network interconnects, the electrical power network requests that the output power of each unit should be directly controlled and dispatched by the electrical power network. In the paper, we mainly study the development of the economic dispatch at home and abroad. The research background and its significance in the power industry are also included. After power plants gain network electric energy in electricity market by price bidding, they need to reasonably arrange the production plan between the units in order to achieve the maximum economic benefits. That’s the problem of economic dispatch with power plant. Economic dispatch has two main aspects. The first one is the economic load dispatch problem which means the how to assign the load between the running units. The second one is problem of unit combination which equals to unit commitment schedules. The objective of optimizing the two problems is to minimize the generation casts (generally the system fuel consumption is considered). Contrary to the problem of p