摘要：配电网无功优化的研究是配电网经济安全运行的一个重要保障，配电网无功优化运行控制是配电网自动化的一个重要组成部分，可以对配电网的电压水平、降低网损、提高功率因数和增强系统稳定进行有效地改善。为了满足用户对电压质量的要求，针对负荷水平的不同，进行控制各种无功补偿设备。本文主要采用配电网无功优化运行控制方案进行配电网的无功优化，建立以配电网的网损和负序电流为目标的配电网无功优化运行控制的数学模型，利用简化梯度法进行求解，得到关于配电网各补偿节点配电网无功优化控制的指标。经算例验证，本文提出的配电网无功优化运行控制方案能有效的降低网损和负序电流，并有效地使配电网的电压水平提高。55828

毕业论文关键词：配电网，负序电流，简化梯度法， 无功优化控制

Abstract: Study of wattless power optimization in distribution network is an important guarantee for the safe operation of the power distribution network economy, 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., according to actual load levels, control of the reactive power compensation equipment to meet the needs of users of voltage quality for the characteristics of distribution network.In this paper, it is establishing the mathematical model of automatic voltage and reactive power operational control, to the loss and negative sequence current distribution network for the goal and 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, taking into account the minimum loss and minimum negative sequence current.

Key words: distribution networks, negative sequence current, the simplifying gradient method, No reactive power control

目录

1.前言 3

1.1配电网的特点 4

1.2配电网自动电压控制（无功优化控制）的研究意义与研究目的 5

1.3配电网优化控制的研究现状 6

1.4本文的主要工作 7

2配电网的无功控制与电压调整 7

2.1配电网中的无功功率平衡 7

2.1.1配电网中的无功功率负荷和无功功率损耗 7

2.1.2配电网的无功功率电源 8

2.1.3配电网无功功率的平衡 8

2.2配电网无功功率和有功网损的关系 10

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 11

2.5配电网电压的调整 12

2.5.1借改变压器变比调压 13

2.5.2借补偿设备调压 13

2.6本章小结 13

3配电网无功优化控制的优化模型 14

3.1配电网无功优化控制的变量 14

3.2配电网无功优化控制的目标函数