考虑风力发电的配电网弱馈线路自适应电流保护

发布时间：2018-01-19 13:15

本文关键词： 风力发电配电网电流保护自适应保护撬棒电路　出处：《电工技术学报》2017年03期 　论文类型：期刊论文

【摘要】：风力发电接入配电网后,配电线路的潮流及故障电流特征发生了改变,风力发电机故障后由于撬棒电路的投入导致风机的正、负序阻抗不再相等,使得以电源正、负序阻抗相等为前提的电流保护整定方案失去合理依据。通过对含风力发电的配电网弱馈线路不同位置发生两相相间短路和三相短路的故障特性进行研究,结合自适应保护的实时在线整定功能,引入含风力发电的电流Ⅰ段和Ⅱ段保护整定修正系数,改善了传统配电网电流保护的性能。最后,通过对含有风力发电的配电网弱馈线路进行仿真,验证了所提保护方案的有效性。
[Abstract]:After the wind power generation is connected to the distribution network, the power flow and fault current characteristics of the distribution line have changed. After the wind turbine failure, the input of the crowbar circuit leads to the positive and negative sequence impedance of the fan is no longer equal. So that the power supply. The setting scheme of current protection with equal negative sequence impedance has no reasonable basis. The fault characteristics of two phase short circuit and three phase short circuit in different positions of weak feeder of distribution network with wind power generation are studied. Combined with the real-time on-line tuning function of adaptive protection, the tuning correction coefficients of current section I and section II with wind power generation are introduced to improve the performance of current protection in traditional distribution network. The effectiveness of the proposed protection scheme is verified by the simulation of the weak feed-line of the distribution network with wind power generation.
【作者单位】：上海交通大学电子信息与电气工程学院;上海市电力公司市南供电公司;
【基金】：教育部科学技术研究项目(113023A) 国家自然科学基金项目(51407115,51377104) 中国博士后科学基金(2014M560333)资助
【分类号】：TM773
【正文快照】： 0引言近年来,随着新能源技术的快速发展,风力发电、光伏技术在电网中得到了越来越广泛的应用。这些新能源目前主要通过两种形式接入电网:1规模化建设,远距离传输;2分布式接入,就地消纳[1,2]。前者通过高压输电线路进行传输,对主网的安全稳定运行提出了更高的要求[3];而后者应

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