基于在线监测系统的和平220kV变电站电能质量评估

发布时间：2018-03-14 22:02

本文选题：电能质量　切入点：质量监测　出处：《华北电力大学》2017年硕士论文　论文类型：学位论文

【摘要】：电能质量的好坏对社会经济的发展和用户生活有巨大影响。随着工业生产前进的步伐,多种具有冲击性、波动性和非线性的负荷,使得电能质量出现各种问题:造成一些用电设备及核心设备损坏,加大电能的损耗程度,甚至出现相关测量仪表因受到干扰信号的作用而加大操作的失误率。电能质量不高影响企业正常的生产作业以及居民用电,造成用电设备的不正常运转,影响整个社会及国民经济的发展。因此,基于电力系统中现有相关供电场所中在线监测系统的电能质量研究和分析,并构建其完善的评估体系,准确客观的对电能质量进行全方位的评估,具有重要的意义。本文在介绍电能质量的概念和各项指标以及分析研究国内标准、IEC标准及国外工业发达国家电能质量标准的基础上,对现有通用的电能质量综合评估方法进行比较分析,结合实际情况,找到适用于变电站电能质量的模糊综合评估方法。然后对和平220kV变电站的电能质量监测与评估系统的需求进行归纳和分析,建立电能质量监测与评估系统模型以及介绍系统硬件的基本组成及各部分的功能。根据软件系统开发中所涉及到主要技术,详细说明本系统软件的结构与功能设计。通过对电能质量检测评估系统的软硬件系统设计,系统的界面得到实现并获得相应的实验数据;对电能质量各指标进行权重分配,通过模糊综合评估方法对和平220kV变电站的电能质量进行综合评估,和其它四种评估方法结果进行比较,得出模糊综合评估法的评估结果有着很大优势。
[Abstract]:The quality of power has a great impact on the development of social economy and the life of users. With the advance of industrial production, there are many kinds of loads with impact, volatility and nonlinear. Causes the power quality to appear various problems: causes some electric power equipment and the core equipment damage, increases the electric energy loss degree, It even appears that the related measuring instruments increase the operation error rate because of the interference signal. The low power quality affects the normal operation of enterprises and the residents' electricity consumption, resulting in the abnormal operation of the electric equipment. Therefore, based on the research and analysis of the power quality of the online monitoring system in the existing relevant power supply sites in power system, a perfect evaluation system is constructed. It is of great significance to evaluate power quality accurately and objectively. This paper introduces the concept and indexes of power quality, and analyzes and studies the domestic standard IEC standard and the power quality standard of developed countries abroad. By comparing and analyzing the existing methods of power quality comprehensive evaluation, combining with the actual situation, The fuzzy comprehensive evaluation method suitable for substation power quality is found, and then the requirement of power quality monitoring and evaluation system for peaceful 220 kV substation is summarized and analyzed. Establish the model of power quality monitoring and evaluation system and introduce the basic composition of the system hardware and the functions of each part. According to the main technology involved in the development of software system, Through the software and hardware system design of power quality detection and evaluation system, the interface of the system is realized and the corresponding experimental data are obtained. The power quality of Heping 220 kV substation is evaluated by fuzzy comprehensive evaluation method, and compared with the results of other four evaluation methods, it is concluded that the fuzzy comprehensive evaluation method has great advantages.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM711;TM63

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