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摘要在当今社会，电能作为一种清洁方便，经济实用的能源，在国家发展的过程中起着重要的作用。而当前的电能质量存在问题，导致企业的设备使用寿命缩短，电网运行效率降低等问题，对用户的生活和企业的生产造成很大困扰，造成严重的经济损失，因此对电能质量相关参数的监测刻不容缓。26125
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随着虚拟仪器技术的快速发展，凭借着丰富的软件功能，高度智能化等特点，在测控领域逐渐成熟。在这样的发展背景下，本课题提出了设计基于虚拟仪器技术的电能质量实时监测系统。该系统可以实现对三相电压电流，功率等基本参数进行实时的监控和测量。可以克服基于传统的以硬件为主的电能质量监测仪器文护起来复杂，价格偏高，在功能这一方面比较单一等缺点，在电能质量监测领域有着广阔的应用前景。
本课题首先从分析电能质量的5个主要参数开始，对其基本概念和产生的危害进行分析。接着再分别从硬件和软件两个方面来对系统进行设计。硬件方面主要对传感器和数据采集卡的选型进行了多种方案的论证。软件方面对电能质量监测系统采取模块化的设计方案，分别对一个个小模块分开来进行设计，最后再通过对主界面的设计，实现对各个模块的调用。重点进行功能模块的介绍，最后进行软件的仿真和总结。
毕业论文关键词：电能质量 虚拟仪器 LabVIEW 监测
Abstract In today's society, energy as a clean and convenient, economical and practical energy，it plays an important role in national development. But the current power quality have problems, resulting in shortening the equipment life in the companies,grid operation efficiency gets lower. On the user's life and enterprise production caused great trouble.Therefore, the related parameters of power quality monitoring is urgently needed.
With the rapid development of the virtual instrument technology and abundant software functions, highly intelligent, etc.In the field of measurement and control gradually mature.Under the background of this development,this topic puts forward the design of real-time power quality monitoring system based on virtual instrument technology.The system can realize the three phase voltage and current, real-time monitoring and measuring basic parameters such as power.Can be overcome to maintain them based on traditional hardware-based power quality monitoring equipment complex, high price, in terms of the function of this relatively simple shortcomings,In the field of power quality monitoring has broad application prospects.
This topic first, starting from the analysis of five main parameters of power quality, analyzes the basic concepts and the harm. Then respectively from two aspects of hardware and software to design the system.Hardware is mainly on the selection of sensor and data acquisition card of a variety of solutions argument.Software aspects of power quality monitoring system adopted modular design, respectively, of separate small module to design, finally, through to the main interface design, realization of each module.Focus on the introduction of function modules. Software simulation and summarized at last.
Key words: Power quality Virtual instrument LabVIEW Monitor
目 录
摘 要 I
Abstract II
1 绪论 1
1.1 课题研究背景和意义 1
1.2 国内外研究现状 1
1.3 本课题主要的研究思路和内容 2
2 电能质量的主要监测指标和测定方法 4
2.1 电压偏差 4
2.2 电力系统的频率偏差 5
2.3 电网谐波 6
2.4 电压波动和闪变 7