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1、区域电力网规划设计 摘要 随着电力在国民经济发展中作用的日益突出，电网的建设与发展正扮演着越来越重 要的角色。电网作为联系电能生产企业与用户的桥梁，对供电的可靠性与稳定性不言而 喻，而电网的设计作为电网建设中的重要一环，必须给予高度的重视。 本文简明扼要地介绍了区域电网设计的过程与方法。区域电网的设计应根据用户负 荷的相关资料，各变电站的地理位置和供电情况做出相应的功率平衡，确定各变电站变 压器的主变容量与台数。根据已有的知识做出几种备选的方案，通过技术经济比较，主 要从以下几个方面：(1) 按经济截面选择导线，按机械强度、载流量等情况校验导线，确 定各段导线型号。(2) 对各种备选方案进行正
2、常和故障情况下的电压和电能损耗的计算， 本过程的计算主要采用手工算潮流电能的方法，得出各种正常及故障时的电压损耗情况， 评定各种接线方案。(3) 从各种方案线路的损耗，线路投资，变电所的投资以及年运行费 用等方面进行经济比较。 综合以上三个方面确定最佳的方案，即为本设计的选定方案。最后对最优方案进行 潮流计算，根据其结果对最优方案评定调压要求，选定调压方案。 关键词：潮流计算；调压方案；电网接线方案 I Regional Power Grid Planning and Design Abstract Along with development of national economy, the
3、 construction of electrical network is acting more and more important role. Electrical network takes a role of the bridge between producing - electrical energy enterprises and users, it is well known that electrical network is also important for the stability and reliability of power supply. The des
4、ign of power system acts as important one aspect in the construction of electrical network, witch must be given an extra attention. This paper concisely has introduced method and the process of the distribution net design of regional power grid. It should be according to the related information of u
5、ser loads, each distribution station site and the condition of power supply of existed power plants, making corresponding power balance, and then determine every distribution transformer capacity and number. According existing knowledge and experience, imagine two kinds alternative scheme, compare t
6、hrough technical economy from some following aspects, require best design: (1) select wire according to economic section, according to machinery strength, the current-carrying capacity etc, checking the wire model. (2) Various choose schemes must be carried out calculation for normal and fault condi
7、tion by manual power flow calculation .Calculation result are normal and fault voltage wastage conditions, remarking various wiring schemes. (3) From the wastage, line investment, the electrical energy of various scheme lines, distribution system annual operation cost as well as investment of electr
8、ical place, carrying out economic comparison and synthesize. Comprehensive above three aspects, that is sure the best scheme for the selection of the design schemes. Finally to the best scheme flow calculation, according to its results we should assess the surge plan requirements of the optimum sche
9、me, and select the final surge plan. Keywords: Power flow calculation; Voltage regulation scheme; Network connection program II 目录 摘要 -I ABSTRACT -II 前言 -1 1 分析原始资料-2 1.1 原始资料- 2 1.2 功率平衡校验-3 1.3 初选方案-4 1.4 确定电压等级-5 2 主接线形式，变压器台数和容量的选择 -6 3 导线型号的选择 -8 3.1 方案 1 的导线型号选择- 8 3.2 方案 6 的导线型号选择- 10 3.3 方案
10、7 的导线型号选择 - 13 4 初步比较 - 16 5 详细比较 - 18 5.1 电压损耗计算-18 5.1.1 电压损耗计算原则- 18 5.1.2 正常运行时的电压损耗- 18 5.1.3 故障运行时的电压损耗- 23 5.2 一次投资-29 5.3 年行运费-30 5.4 比较分析-31 6 最优方案潮流计算 -32 6.1 正常运行时最大负荷情况-32 6.2 正常运行时最小负荷情况-37 6.3 故障情况下的潮流计算-42 7 变压器分接头选择 -47 8 最优网络统计数字 -53 结论 -54 III 参考文献 -55 致谢 -56 0 前言 电力工业是国民经济发展的基础工业。 区域电力网规划、设计及运行的根本任务是，在国民经济发展计划的统筹安排下,合 理开发、利用动力资源，用较少的投资和运行成本，来满足国民经济各部门及人民生活 不断增长的需要，提供充足、可靠和质量合格的电能。 区域电网规划是根据国民经济发战计划和现有电力系统实际情况，结合能源和交通 条件，分析负荷及其增长速度，预计电力电量的发展，提出电源建设和系统网架的设想， 拟定科研、勘探、设
