220KV电力网设计

摘要

本文设计的电力网包括：1个水电厂、3个变电站，装机容量为180MW的地方电力网。文中按照电网规划设计的一般原则和常用方法，先对该网络进行有功无功平衡的校验，确定电网电压等级和电网接线方案，选择了4个方案进行初步比较；再选择3个较合理的方案进行详细比较，依据统筹兼顾、综合平衡、整体优化的观点，从技术、经济等方面确定一个最优的方案，然后确定发电厂、变电所的接线方案和变压器型号、容量及参数，最后对该最优方案进行潮流分布与调压措施的选择，以及统计系统设计的主要指标。

关键字：电力网电压等级潮流分布调压计算设计指标

Abstract

This design of the power network consists of: a hydroelectric power plant, three transformer substation, where power installed capacity of 180MW Power network. Paper power planning and design in accordance with the general principles and common methods, the first network to the balance of active and reactive Check, to determine the grid voltage and grid connection program, selected four preliminary comparison program; then select three A more reasonable option for a detailed comparison, based on integrated, comprehensive and balanced, the overall optimization point of view, from a technical, the Economic and other aspects of determining an optimal solution, then determine the power plant, transformer substation wiring scheme and model, capacity Volume and parameters, and finally the trend of the optimal solution for the choice of distribution and regulator measures, and statistical design of the main system T o indicators[1].

Keywords: Power network Voltage level Flow distribution Voltage regulator calculation Design specifications

目录

第一章绪论----------------------------------------------------------------- 1

1.1 引言---------------------------------------------------------------- 1

1.2 原始资料分析-------------------------------------------------------- 1 第二章功率平衡计算--------------------------------------------------------- 3

2.1 有功功率平衡计算---------------------------------------------------- 3

2.2 无功功率平衡计算---------------------------------------------------- 3

2.3 确定发电厂运行方式-------------------------------------------------- 4 第三章供电方案的确定------------------------------------------------------- 5

3.1 电压等级的选择------------------------------------------------------ 5

3.2 电力网接线方案的初步选择-------------------------------------------- 5

3.3 区域电力网接线方案初选---------------------------------------------- 8

3.4 技术上的初步选择---------------------------------------------------- 8

3.5 网络结线方案精确计算----------------------------------------------- 10 第四章接线方案及变压器选择------------------------------------------------ 15

4.1 发电厂主接线------------------------------------------------------- 15

4.2 确定变电所结线方式------------------------------------------------- 17

4.3 确定变压器型号、台数及容量----------------------------------------- 18 第五章调压计算------------------------------------------------------------ 20

5.1 概述--------------------------------------------------------------- 20

5.2 系统参数计算------------------------------------------------------- 20

5.3 各点的计算负荷和功率损耗计算及结果--------------------------------- 21

5.4 网络电压损耗计算和变压器抽头选择----------------------------------- 24

5.5 调压计算结果分析--------------------------------------------------- 27 第六章设计指标------------------------------------------------------------ 28

6.1 线损率的概念及计算------------------------------------------------- 28

6.2 全年平均输电效率--------------------------------------------------- 29 总结----------------------------------------------------------------------- 30 参考文献------------------------------------------------------------------- 31 致谢----------------------------------------------------------------------- 32