用于光伏低电压穿越测试的电压跌落发生器设计与试验

发布时间：2018-01-15 11:50

本文关键词：用于光伏低电压穿越测试的电压跌落发生器设计与试验　出处：《电力系统自动化》2014年19期 　论文类型：期刊论文

【摘要】：针对光伏低电压穿越测试,提出一种能适应多种电网电压等级的电压跌落发生器通用设计方案。依据国家标准GB/T 19964—2012中规定的低电压穿越曲线要求,阐述了典型阻抗形式电压跌落发生器的工作原理;提出一种该电压跌落发生器中限流电抗器和接地电抗器的拓扑结构及电气参数设计方法;给出一个电压等级为10kV,且可以5%步长实现从0%至100%电网额定电压的全范围20种电压跌落深度的电压跌落发生器设计实例。最后,针对一台500kW光伏并网逆变器,进行了多种深度尤其是零电压穿越的单相和三相跌落试验,试验结果证明了该方案的有效性。
[Abstract]:Low voltage traversal test for photovoltaic. This paper presents a general design scheme of voltage sag generator which can adapt to various voltage levels of power network, according to the requirements of low voltage traversal curve stipulated in GB/T 19964-2012. The principle of typical impedance voltage drop generator is described. A design method of the topology and electrical parameters of the current limiting reactor and the grounding reactor in the voltage drop generator is presented. A design example of a voltage drop generator with a voltage grade of 10 kV and 20 voltage drop depths from 0% to 100% rated voltages in 5% steps is given. For a 500kW photovoltaic grid-connected inverter, single-phase and three-phase drop tests with various depths, especially zero voltage traversing, have been carried out. The experimental results show that the proposed scheme is effective.
【作者单位】：中国电力科学研究院(南京);
【基金】：国家电网公司科技项目(NY71-13-036)~~
【分类号】：TM615
【正文快照】： 0引言随着光伏电站装机容量的迅速增加,很多国家的电力系统运行导则对光伏并网逆变器的低电压穿越(low voltage ride-through,LVRT)能力进行了重点规定[1-3]。这就首先要求具备能通过模拟电网各种低电压跌落故障来进行LVRT检测的电压跌落发生器(voltage sag generator,VSG)。

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