漳州电网自动电压控制AVC系统的实现与应用研究

发布时间：2019-03-23 20:46

【摘要】：电压质量是否合格的一个基本指标是用户侧的电压水平在额定值附近并且电网中的无功就地平衡。变电站在电力系统的几大组成部分中具有重要的地位,在变电站设备运行操作中一般采用改变有载调压变压器分接头档位和投切并联电容器组的方法来达到调节电压和无功的目的。这些方法可提高电压合格率,降低无功损耗,降低网损,使电网既能满足供电质量,又能最经济地运行。因此,变电站电压无功控制具有十分重要的意义和作用。目前无功电压控制最常采用的是九区图及其改进十六区算法,使变压器二次侧电压位于合格区域内。当前调度自动化技术和管理方式正经历巨大的变革。作为最新自动化三大技术的调控一体技术、地县一体技术、智能配电技术正在福建各地市公司有条不紊的开展建设。在这个背景下,AVC系统在调控一体建设工程实际中碰到的问题需要研究解决,参数根据实际情况需要进行优化。同时在地县一体AVC部署过程中需要对各种实施方案进行比较选择,并研究提高无功控制系统的运行效果。本文研究对象为漳州正在建设中的调控一体化数据采集及监控系统IES600中AVC功能,从实际运行经验出发对系统功能进行设置,研究电容器和变压器分接头在一天内的动作次数限制及连续动作延时,以及闭锁信号的筛选,解决在AVC调节指令过多情况下减少调节失败的问题；详细从系统模式选择、结构设计、存在的风险解决等对比分析了在建立地县一体模式下AVC系统过程中出现的不同技术方案,阐述如何实现地县一体化EMS系统下的AVC功能,并提出并行遥控的遥控命令下发模式；最后借鉴国内外其他地区负荷预测方法应用于AVC系统中的经验,探讨引入现有调度系统中广泛应用的电量抄表系统的数据做相关计算,做出负荷预测曲线,引入负荷预测的结果,对重载或者调节频繁的变电站电容器和变压器分接头指导其动作,能在负荷产生波动时,尽量减少装置的频繁动作,达到优化网损、保证电力系统安全经济运行的目的。
[Abstract]:One of the basic criteria of voltage quality is that the voltage level on the user side is close to the rating value and the reactive power in the power grid is balanced on the spot. Substations play an important role in several major components of the power system. In the operation of substation equipment, the voltage and reactive power can be adjusted by changing the tap-changer position and switching the shunt capacitor bank of the on-load voltage-regulating transformer to achieve the purpose of regulating the voltage and reactive power. These methods can improve the qualified rate of voltage, reduce the reactive power loss and reduce the network loss, so that the power network can not only meet the power supply quality, but also can operate economically. Therefore, substation voltage and reactive power control has a very important significance and role. At present, the nine-zone diagram and its improved sixteen-zone algorithm are the most commonly used in reactive power and voltage control, so that the secondary voltage of transformer is located in the qualified area. The current dispatching automation technology and management methods are undergoing tremendous changes. As the latest automation of the three major technologies of regulation and control integration technology, county integration technology, intelligent power distribution technology in Fujian cities and cities around the company to carry out the construction in an orderly manner. In this context, the problems encountered by the AVC system in the control of integrated construction engineering need to be studied and solved, and the parameters are optimized according to the actual situation. At the same time, it is necessary to compare and select all kinds of implementation schemes in the process of AVC deployment, and to improve the operating effect of reactive power control system. The object of this paper is the AVC function of the data acquisition and monitoring system IES600, which is being constructed in Zhangzhou, and the function of the system is set according to the practical operation experience. In order to solve the problem of reducing adjustment failure in the case of too many AVC regulation instructions, the limit of action times and continuous action delay of capacitor and transformer tap in one day, as well as the screening of blocking signal, are studied in order to solve the problem of reducing regulation failure in the case of excessive AVC regulation instructions. From the choice of system mode, structure design, risk solving and so on, this paper compares and analyzes the different technical schemes that appear in the process of establishing AVC system under the mode of integration of prefecture and county, and expounds how to realize the function of AVC under the integrated EMS system of prefecture and county. And the remote control command sending mode of parallel remote control is put forward. Finally, referring to the experience of applying load forecasting method to AVC system at home and abroad, this paper discusses how to introduce the data of electricity meter reading system, which is widely used in the existing dispatching system, to make relevant calculation and make the load forecasting curve. The results of load forecasting are introduced to guide the substation capacitor and transformer tap-changers, which are overloaded or regulated frequently, so that when the load fluctuates, the frequent action of the device can be minimized, and the network loss can be optimized. The purpose of ensuring the safe and economical operation of power system.
【学位授予单位】：福州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM761.12

【相似文献】