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摘要配电网作为电力系统的重要组成部分，与人民生活和经济生产密切相关，为了使得配电网可以安全可靠经济地运行，进行配电网的潮流计算和网损分析显得尤为重要。潮流计算作为配电网设计规划和运行的可靠性、合理性、经济性分析的基础，需要重点选择其算法以使得其可以可靠收敛。在对主要的潮流算法进行比较后，最后选择了前推回代法，并且基于潮流计算的结果进行实时的网损计算。本文还对传统的网损计算方法存在的问题进行了探讨，选择的基于潮流的网损计算算法相比于以往的算法误差更小。系统使用Visual Basic语言进行编程实现，可以查询节点电压、电压偏差百分数和线路不同时间的线损率，并且设有电压偏差过大时的报警窗口。系统使用Excel表格进行数据的显示，具体实例表明了其方便了管理、查询与分析。28412
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关键词 配电网 潮流计算 网损分析 线损率
毕业论文设计说明书外文摘要
Title The System Design of Power Flow Calculation and Loss Analysis of the Distribution Network Abstract
As an important part of power system, distribution network is closely related to people’s life and economic production. To make the distribution network into a secure and economic system, it is particularly important to do the flow calculation and loss analysis. Power flow calculation is the basis of the analysis of reliability, rationality and economic benefits, which is important for the planning and construction of distribution network. We should choose the algorithm carefully so that if can be reliably convergence. At the same time, we compared the main flow algorithm and selected back/forward sweep flow algorithm. Real-time calculation of net loss is based on the result of the power flow calculation. This paper also discussed the problems of traditional loss calculation. Then we find that the loss calculation based on the result of power flow calculation has smaller deviation of network loss than the previous algorithm. The system we designed uses Visual Basic programming language and you can check the node voltage, voltage deviation percentages and the line loss rate at different times through it. It also has an alarm window for large voltage deviation. The system is combined with Excel to make the management, query and analysis more convenient.
Keywords distribution network power flow calculation analysis of net loss line loss rate
目次
1 引言 1
1.1 课题的研究背景 1
1.2 国内外研究现状 1
1.3 课题的研究意义 4
2 潮流计算算法简介 5
3 网损计算算法与网损分析简介 7
3.1 网损算法简介 7
3.2 网损分析简介 9
4 课题使用的程序语言及软件介绍 10
4.1 Visual Basic程序语言简介 10
4.2 Visual Basic6.0在课题中的应用 12
4.3 Excel在课题中的应用 13
5 系统的功能设计与实现 14
5.1 改进的前推回代法[12]介绍 14
5.2 潮流编程 16
5.3 网损计算、电压偏差计算、线损率计算编程 18
5.4 登陆界面设计 21
5.5 系统界面设计 23
5.6 小结 28
6 实例验证 29
6.1 潮流、网损、电压偏差计算 29
6.2 节点电压相关计算结果分析 35