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1、基于基于 VQC 的电力系统无功优化补偿方案研究的电力系统无功优化补偿方案研究摘摘 要要近年来，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
2、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
3、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AbstractIn recent years, with the continuous development of Chinas power industry, a wide range of high voltage transmission network gradually formed, each important enterprises, business cir
4、cle, 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 becoming more and more strict. As active power, reactive power, is to guarantee power system power quality, reduce the loss of power grid
5、 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 systems voltage collapse accident. Reactive power is to set up an alternating current, magnetic
6、 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 conve
7、ying 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 reactive compensation technology, and adopt all kinds of reactive power compensation device to control the
8、reactive power. In city power grid, the peak valley load difference is bigger, the instantaneous changes more frequently, the demand for reactive power compensation is higher, to achieve fast, accurate and reliable. In this paper, by studying the various power system reactive power compensation stra
9、tegy, aiming at the characteristics of urban power grid reactive power optimization strategy, design the VQC on the basis of theoretical analysis, research and design the transformer substation of reactive power compensation optimization scheme. Of VQC through evolutionary computation on the reactiv
10、e power optimization strategy improvement program has explored and validated, reactive power optimization strategy is further evidence that the improvement of the effectiveness of urban power grid reactive power compensation. This papers main work includes: (1) of urban power grid reactive power opt
11、imization strategy for design; (2) select a substation VQC optimization strategy for the practice; (3) to reactive power optimization strategy algorithm is improved and designed based on variable calculation method and regional figure of VQC strategy, and through the calculation conclusion, further
12、improve the effectiveness of the reactive power optimization strategy is verified.Keyword：Reactive compensation,VQC, optimize目录目录基于 VQC 的电力系统无功优化补偿方案研究 .1摘 要 .1Abstract .21 绪论 .61.1 选题背景和意义 .61.2 国内外研究现状 .71.3 本文主要工作 .92 无功补偿控制策略分析 .102.1 无功补偿容量计算标准 .102.2 传统补偿控制判据介绍 .132.3 几种不同无功补偿策略的分析 .152.4 智能控制技术在变电站 VQC 中的应用 .162.4.1 基于专家系统的变电站 VQC.172.4.2 基于神经网络的变电站 VQC.172.4.3 基于模糊逻辑控制的变电站 VQC.182.4.4 基于模糊神经网络的变电站 VQC.192.4.5 基于遗传算法的变电站 VQC.193 基于变量计算的 VQC 策略.21 3.1VQC 策略原理 .21 3.2 基于变量计算的 VQC 策略.26 4 基于区域图法的 VQC 策略.30 4.1 九区图电压无功控
