主动配电网电能质量析与评估毕业论文.docx

四川大学工程硕士学位论文 主动配电网电能质量分析与评估主动配电网电能质量分析与评估 随着分式电源（Distributed Generation, DG)越的接入网，传潮流的被电网正逐变成双流的集发电装主动网（Active Distribution Network，ADN)。主网是实现大规式并网运控制、电网能设动、智能配电网分行关术的解案。主电网中含有大量分电源，各种分布源都会在一定程响电网质量。因此，主动配质量分析与评估具有重义。本文所做主要工作有：1）简要介绍了主动配电网的基念，分析了主动配电网电量特点，并对国内量分析与研究的行了概括和分析。2）研究了主动配电网中各个主要组成部分的模型，包括变型、输电型、负型和DG模型，并根据主动点，建立了网评价指标体系。3）总结了电能质量的一般概念，并分析了电能质量国家标准中规定的6项电能质量指标的定义和危害，包括：供电电差、电力统频差、电压不度、电压波变、公用电波，最后总结归纳出电能质量国家标准中规定的该6项指标的限值。搭建了主动配电网基本模型，并对主动配电网的4项电能质量指标进行了分析，包括谐变、电差、三相衡和电压闪变。4）分析了分布式电源接入主动配电网后的电能质量问题，提出了主动配电网电能质新指方法，通过电量变化量指统指标来评估主动配质量，并对算例进行了分究，表明了该方效性。关键字：主动配电网；电能质量；评估指标；主动配电网模型；分布式电源Power Quality Analysis and Assessment on Active Distribution NetworkWith more and more distributed generation（DG）connected to distribution network，the traditional passive distribution network with unidirectional flow is replaced by bidirectional active distribution network (ADN) integrating many distributed generation devices. AND is a solution to realize key technology of power grid analysis and operation such as large-scale distributed energy grid-connected operation and control, grid interaction with energy storage devices, smart distribution and using electricity and so on .There are many distributed generations in active distribution network, which may worsen the power quality of the power system. So, it’s significant meaningful to analyze and assess the power quality in the active distribution network. The following work has been done in this paper:1) The basic conception of active distribution network is briefly introduced and the characteristic of active distribution network is analyzed, then the domestic and overseas current situation of power quality analysis and research is summarized and analyzed.2) The components of the active distribution network model, including transformer model, transmission line model and the load model has been studied, in addition, the active distribution network evaluation index system is established acco