论文标题:地区电网电压无功优化控制的研究
论文作者
论文导师 厉吉文,论文学位 硕士,论文专业 电力系统及其自动化
论文单位 山东大学,点击次数 156,论文页数 78页File Size3311K
2006-05-15论文网 http://www.lw23.com/lunwen_172947242/
Distribution control;Agent technology;Reactive power flow optimization;Communication system;VQC
近年来随看我国城币建设的迅速发展，用电负荷需求量不断增大，并且对电能质量、供电可靠性的要求也不断提高，现有城网已不能充分满足各方面的要求。为了达到保证电能质量、降低网损、提高配电网运行管理水平的目的，枣庄供电公司与山东大学合作研究开发了基于全网优化的分布控制式电压无功优化控制系统。在这种背景下，本论文对地区电网的电压无功优化控制进行了研究。 地区电网电压无功控制问题是一个关系到系统电压稳定、保证电压质量、提高电网运行经济性的重大课题，因此一直受到电力系统运行人员和研究人员的关注。然而由于电压无功控制问题是一个控制变量离散、具有等式和不等式多约束条件的非线性优化问题，加之电力系统的互联性及运行的瞬时性、动态性等因素的影响，导致长期以来这一经典问题并未得到有效的解决。本文回顾了电压无功控制研究的历史和现状，指出随着计算机技术、通信技术以及变电站自动化、调度自动化水平的提高，区域电网电压无功优化控制的实现已成为可能，在分析了传统电压无功控制方式缺陷的基础上，提出分布式电压无功优化控制系统更适合目前电网的运行，并结合枣庄电网的实际情况给出了该控制系统完整的实现方案。 枣庄地区电网电压无功全局优化控制系统由主站系统、网内各变电站电压无功实时控制子系统(VQC)及通信子系统组成。主站系统利用一天24小时各变电站低压侧负荷有功和无功的实时数据(由VQC提供，按一定时间间隔上送至主站)及开关状态信息，以控制整个电网节点电压在允许范围内和电网有功损耗最小为优化目标，进行全电网无功优化计算，并以此为基础得出变电站电压无功控制装置的控制范围，既考虑了对变压器低压侧母线电压和变压器高压侧无功功率的最优变化曲线的跟踪，又顾及了减少电容器投切和分接头动作次数的要求。变电站电压无功实时控制子系统(VQC)负责监控变压器和电容器状态、采集电网运行参数及根据主站系统提供的电压无功限值按模糊边界九区图实施具体控制策略。通信子系统实现主站系统与子站系统VQC控制程序之间的
In recent years, with the rapid development of the city constructions in our country, the need of power supply is increasing quickly, as well as there is high requirement to the quality and reliability of power supply. However, the present city electricity network can"t apply the demand. In order to ensure electricity energy quality, decrease network loss and raise the management level of distribution network, zaozhuang electricity power company and Shandong university work together to develop the global optimization based on voltage and reactive-power control system. Under this ground, this paper has done some work to research voltage and reactive power control method in region network.Voltage and reactive power control of region network is an important issue related to voltage, stability, voltage quality and economical operation of power system. Voltage and reactive power control problem is a typical non-linear problem with discrete variable, multi-constraints, and it"s usually affected by the features of interaction and dynamic of power system. Hence, the Voltage and reactive power control problem hasn"t got satisfied resolutions for a long time. This paper makes a brief overview of the history and current status of the research on voltage and reactive power control, points out that with the improvement of the computer technology, communication technology, substation automation and dispatching automation level, regional voltage and reactive power optimal control already become possible and propose the global optimization based voltage and reactive-power control system based on analyzing the disadvantages of the traditional methods.The global optimization based voltage and reactive-power control system in zaozhuang power network consists of main station system, voltage and reactive-power real-time control subsystem (VQC) and communication subsystem. The discrete reactive power optimization algorithm of the entire power network is performed in main station system to minimize active-power loss and keep bus voltage within allowable range according to 24 time segment data of the daily active and reactive power of the low-voltage side of each substation (supplied and transmitted in certain
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