摘要：随着科学技术的发展，实现配电网的自动化控制已成为电力系统发展的主要趋势。在配电网安装无功补偿设备，减少无功功率在电力网的流动，可以降低电能损耗，改善用电端电压质量，有着显著的经济效益和社会效益。目前研发配电网自动电压控制程序是非常必要的。作为配电网自动化的一个重要组成部分，配电网自动电压无功运行控制是配电网安全经济运行的一个重要技术措施，能够有效地改善配电网的电压水准、减少网络损耗、改善功率因数和提高系统的稳定性。78960

本设计将各补偿点的无功功率作为控制变量，利用梯度求解求出目标补偿容量。经过算例验证，本设计的程序控制方案是一种理想的补偿方案，具有一定的可行性。

毕业论文关键词：配电网，电力系统，无功补偿，自动电压控制，无功功率，梯度求解

Abstract：With the development of science and technology,realizing the automation control of distribution network has become the main trend of power system development。Installing reactive power compensation equipments in the distribution network brings significant economic and social benefits。It can reduce the flow of reactive power and the power loss in the power grid,and improve the power quality。At present，the research and development of automatic voltage control procedure in the distribution network is very necessary。 As an important part of the distribution network automation, automatic voltage and reactive power operational control in distribution networks is an important part of Automation in distribution network, which is an important means to safe and economic operate, which can effectively improve the voltage levels in distribution network, reduce loss and improve power factor and enhanced system stability。

In this paper , it is establishing the compensation reactive power as control variables, use the simplified gradient method for solving, get the target of automatic voltage and reactive power operational control at every compensation node in distribution networks。 By the numerical example, this paper, the program of voltage and reactive power operational control in distribution networks, can effectively improve voltage level in the distribution networks。

Key words：distribution network，electric power system，reactive power compensation，automatic voltage control，reactive power，gradient solving

目录

1 绪论 3

1。1 配电网自动化电压控制的研究背景及意义 4

1。2 电压及配电网的特点 4

1。3 本设计的主要工作 5

2 配电网的无功控制与电压调整 5

2。1 配电网中的无功功率 5

2。2配电网无功功率和有功网损的关系 9

2。3配电网无功功率和功率因数的关系 11

2。4配电网无功功率与负序电流的关系 12

2。5 配电网的电压调整 13

3 配电网自动电压程序设计 14

3。1 程序软件MATLAB 15

3。2 配电网自动电压的变量 16

3。3 配电网自动电压的目标函数 17

3。4 配电网AVC等式约束 17

3。5 配电网自动电压的不等式约束 18

结论