电力三相不平衡度在线检测技术研究

发布时间：2018-03-28 08:32

本文选题：电能质量　切入点：三相不平衡　出处：《湖南大学》2014年硕士论文

【摘要】：电能在现代社会中发挥着越来越重要的作用，电能在终端能源消费中所占比例代表着一个国家的科技发展程度。随着越来越多不平衡负载在电力系统中的使用，三相不平衡现象日益严重。电力三相不平衡不仅影响用户端设备的正常运行，还可能引起供电电压的闪变、波动，增加线路损耗，严重影响电能质量。三相不平衡等电能质量问题日益引起人们的重视，国内外针对电能质量颁布了多个标准。为了实现对电力三相不平衡实时在线检测，本文以DSP处理器TMS320VC5502为数据分析核心，以飞思卡尔ARM处理器为管理单元核心，设计一个具有多参数分析并集显示与存储为一体的三相不平衡在线检测系统。由于DSP运算功能强大，该三相不平衡在线检测系统能计算基本电参量，并具有三相不平衡事件分析功能，借助ARM的强大管理功能可实现实时显示及数据的存储。该设计方案结构简单、软件可移植性强、成本低、功耗低、可靠性高，具有广阔的市场前景和应用价值。全文共分为五个部分，，第1章对电能质量背景知识、电能质量标准、检测技术的发展进行介绍，并总结三相不平衡的研究现状；第2章详细介绍各电能质量参数的计算方法，并提出一种新的三相不平衡度快速相量算法；第3章讲解系统的构成与工作原理，对系统的整体设计及各模块进行介绍；第4章讲解系统的软件设计，对软件的开发平台，各重要软件模块进行介绍；第5章对系统的调试与结果进行分析，其中重点分析新型三相不平衡快速相量算法的实验结果，数据的校准方式及对新型三相不平衡度检测算法的误差进行分析；结论对全文进行总结，给出研究的不足，并对进一步研究给出展望。 MATLAB仿真及DSP实际运算数据结果表明本文提出的三相不平衡度新型算法相对于标准规定方法能更快更精确地完成三相不平衡的事件分析，具推广应用价值。测试结果表明，本文设计的三相不平衡在线检测系统可满足三相不平衡事件的实时在线检测要求，各种电参数的测量在DSP中的计算结果可达到标准要求。
[Abstract]:Electric energy plays a more and more important role in modern society. The proportion of electric energy in terminal energy consumption represents the development of science and technology in a country. As more and more unbalanced loads are used in power system, The phenomenon of three-phase imbalance is becoming more and more serious. Power three-phase imbalance not only affects the normal operation of the equipment at the user side, but also may cause the flicker and fluctuation of the supply voltage and increase the line loss. People pay more and more attention to power quality problems, such as three-phase imbalance, which seriously affect power quality. Many standards have been issued for power quality at home and abroad. In order to realize the real-time on-line detection of power three-phase imbalance, the DSP processor TMS320VC5502 is used as the data analysis core, and the Freescale ARM processor is used as the management unit core. A three-phase unbalance on-line detection system with multi-parameter analysis, display and storage is designed. Because of the powerful operation function of DSP, the three-phase unbalanced on-line detection system can calculate the basic electrical parameters. With the help of the powerful management function of ARM, the real-time display and data storage can be realized. The design scheme is simple, the software is portable, the cost is low, the power consumption is low, and the reliability is high. It has broad market prospect and application value. The paper is divided into five parts. Chapter 1 introduces the development of power quality background knowledge, power quality standards, detection technology, and summarizes the research status of three-phase imbalance. Chapter 2 introduces the calculation methods of power quality parameters in detail. A new fast phasor algorithm for three-phase unbalance degree is proposed. Chapter 3 explains the composition and working principle of the system, introduces the whole system design and each module, and chapter 4 explains the software design of the system, and the software development platform. Chapter 5 analyzes the debugging and results of the system, especially the experimental results of a new three-phase unbalanced fast phasor algorithm. The calibration method of the data and the error of the new three-phase unbalance detection algorithm are analyzed, and the conclusion is summarized, the deficiency of the research is given, and the prospect of further research is given. The results of MATLAB simulation and DSP actual operation data show that the new algorithm of three-phase unbalance degree proposed in this paper can accomplish the event analysis of three-phase imbalance more quickly and accurately than the standard method, and it is worth popularizing and applying. The test results show that, The three-phase unbalanced on-line detection system designed in this paper can meet the requirements of real-time on-line detection of three-phase unbalanced events, and the calculation results of various electrical parameters in DSP can meet the standard requirements.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM930

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