项目名称: 基于云模型的分布式居民负荷谐波集体影响的评估方法研究
项目编号: No.51207088
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 电气科学与工程学科
项目作者: 林顺富
作者单位: 上海电力学院
项目金额: 24万元
中文摘要: 随着民用分布式非线性负荷在配电网中越来越多的应用,在电网中引起日益严重的谐波畸变,逐渐引起业界的重视。配电网分布式非线性负荷集体谐波影响的评估技术,变得很必要且具有重要意义。例如,其可用于预测大量采用插入式混合动力车对配电网的集体谐波影响。针对这个需求,引入谐波负荷心理学模型以反映居民生活习惯和电力监管政策变化的影响,为配电网提出一种自下向上的、基于云模型的分布式居民负荷集体谐波影响的评估方法,并对其进行研究。它通过仿真负荷的随机操作状态以建立非线性负荷的随机谐波注入模型,并基于负荷研究结果确定负荷的开启概率性分布。一个家庭可用一个随机变化的谐波等效电路代表,基于云模型以建立多个居民家庭的谐波模型,以评估多个居民家庭对配电网的集体谐波影响。所提评估方法具有系统性和通用性,可方便地应用于其它分布式时变随机谐波分析和需求响应分析中,具有重要的理论意义和工业价值。
中文关键词: 非线性负荷;谐波;非干预式负荷识别;概率性分析;云模型
英文摘要: The proliferation of power-electronic-based distributed loads have resulted in significant harmonic distortions in residential distribution systems. There is an urgent need for techniques that can determine the collective harmonic impact of these distributed residential loads. Such techniques can be used, for example, to predict the harmonic effects of mass adoption of the plug-in hybrid electrical vehicles (HEVs). In response to the need, this paper proposes a bottom-up, cloud model based method for residential feeders with consideration of the impacts of customer behavior and regulatory policy changes by introducing the psychology modeling of harmonic loads. The method models the random harmonic injections of home appliances by simulating the random operating statuses of the appliances with considering the impacts of customer behavior and regulatory policy changes. This is done through determining the switching-on probability of an appliance based on the load research results. The result is a randomly varying harmonic equivalent circuit representing a residential house. By establishing the harmonic model of multiple residential houses based on cloud model supplied with a service transformer. Based on the proposed techniques, the project will study the collective impact of residential loads on the secondary pow
英文关键词: nonlienar loads;harmonics;nonintrusive load identification;stochasitic analysis;cloud model