基于VQC的电力系统无功优化补偿方案研究.doc

基于VQC的电力系统无功优化补偿方案研究
摘要
近年来,随着中国电力工业的不断发展,逐步形成了广泛的高压输电网络,重要的企业,商家,政府机构形成电能质量要求高,对电网的无功功率的要求越来越严格。有功功率,无功功率,以确保供电质量,降低网络损耗,并确保其安全运行不可缺少的一部分。电网无功功率不平衡会导致系统电压波动巨大,会造成严重的损坏电气设备,系统电压崩溃事故。无功功率为建立交变磁场所需要的功率。在有功功率恒定的无功功率的存在的情况下,会导致功率因数,以减少视在功率增加,从而需要增加头发,较大的传输设备投资的能力和电力消耗的增加,增加了运行成本,传输线的电压降是不有利于电源的交付和合理应用。电力系统的无功功率是有害的,它很早就有更深入的了解各种无功功率补偿,以及各种类型的无功补偿装置,无功功率控制。城市电网负荷峰谷差是比较大的,各种瞬时变化的情况下更加频繁,无功补偿的要求比较高,要实现快速,准确,可靠的。
本文通过研究目前各种电力系统无功补偿策略,针对城市电网的特点设计出 VQC 无功优化策略,在理论分析的基础上,研究和设计了变电站的无功补偿优化方案。通过进化计算对 VQC 在无功优化策略改进方案上进行了探索和验证,进一步证明了改进无功优化策略对城市电网无功补偿的有效性。
本文所做的主要工作有:
(1)针对对城市电网无功优化策略进行了设计;
(2)选取某一变电站对 VQC 优化策略进行了实践;
(3)对城市无功优化策略算法进行了改进研究,设计了基于变量计算和区域图法的VQC策略,并通过计算的结论,进一步验证了改进无功优化策略的有效性。
关键词:无功补偿,VQC,优化
Abstract
In recent years, with the continuous development of China's power industry, a wide range of high voltage work gradually formed, each important enterprises, business circle, the formation of the government authority to power quality put forward higher requirements, at the same time also to power grid reactive power requirement is ing more and more strict. As active power, reactive power, is to guarantee power system power quality, reduce the loss of power grid and ensure the safe operation of the indispensable part. Power grid reactive power imbalance will lead to huge fluctuation in the system voltage, will cause serious damage to the electrical equipment and system's voltage collapse accident. Reactive power is to set up an alternating current, ic field and the needed power. Under the condition of the active power unchanged the existence of the reactive power will reduce power factor increases apparent power to need to increase hair, increase the capacity of power transmission equipment investment and power loss increase operating cost conveying pressure drop larger against power of transmission lines and the reasonable application. Because of the power system of reactive power in hazardous, people have long been aware of various pensation technology, and adopt all