消除有功振荡的改进低电压穿越方法
发布时间：2018-08-04 13:09
【摘要】：随着光伏发电在新能源结构中所占的比重越来越大,国内外最新标准要求光伏逆变器必须具有低电压穿越(LVRT)能力。针对现有方法输出有功功率振荡的问题,提出一种改进的低电压穿越方案。首先采用正序和负序控制(PNSC)注入有功电流使得有功恒定和电流正弦;另外考虑到国内外标准对LVRT无功支撑的要求,推导出既能抬升电压又能消除有功振荡的无功电流。针对电压跌落时并网电流不对称造成的过流问题,推导出限流方案。最后进行仿真和实验研究,验证了所提方法的正确性和有效性。
[Abstract]:With the increasing proportion of photovoltaic power generation in the new energy structure, the latest standards at home and abroad require that photovoltaic inverters must have the ability of low voltage traversing (LVRT). An improved low voltage traversal scheme is proposed to solve the problem of active power oscillation. First, the positive sequence and negative sequence are used to control the active current injected into the (PNSC) to make the active power constant and the current sinusoidal. In addition, considering the requirements of the domestic and foreign standards for the reactive power support of LVRT, the reactive current which can not only lift the voltage but also eliminate the active power oscillation is deduced. In order to solve the overcurrent problem caused by the asymmetry of grid-connected current during voltage drop, the current limiting scheme is deduced. Finally, simulation and experimental research are carried out to verify the correctness and effectiveness of the proposed method.
【作者单位】： 燕山大学电气工程学院;江苏信息职业技术学院;
【基金】：高等学校博士学科点专项科研基金(20121333110007) 河北省应用基础研究计划重点基础研究项目(13964304D)资助项目
【分类号】：TM615
本文编号：2163985
[Abstract]:With the increasing proportion of photovoltaic power generation in the new energy structure, the latest standards at home and abroad require that photovoltaic inverters must have the ability of low voltage traversing (LVRT). An improved low voltage traversal scheme is proposed to solve the problem of active power oscillation. First, the positive sequence and negative sequence are used to control the active current injected into the (PNSC) to make the active power constant and the current sinusoidal. In addition, considering the requirements of the domestic and foreign standards for the reactive power support of LVRT, the reactive current which can not only lift the voltage but also eliminate the active power oscillation is deduced. In order to solve the overcurrent problem caused by the asymmetry of grid-connected current during voltage drop, the current limiting scheme is deduced. Finally, simulation and experimental research are carried out to verify the correctness and effectiveness of the proposed method.
【作者单位】： 燕山大学电气工程学院;江苏信息职业技术学院;
【基金】：高等学校博士学科点专项科研基金(20121333110007) 河北省应用基础研究计划重点基础研究项目(13964304D)资助项目
【分类号】：TM615
【相似文献】
相关期刊论文 前10条
1 赖成毅;;应用高新技术改造传统产业 实现绿色环保和高效节能[J];电子元器件应用;2012年08期
2 ;[J];;年期
3 ;[J];;年期
4 ;[J];;年期
5 ;[J];;年期
6 ;[J];;年期
7 ;[J];;年期
8 ;[J];;年期
9 ;[J];;年期
10 ;[J];;年期
，本文编号：2163985
本文链接：https://www.wllwen.com/kejilunwen/dianlilw/2163985.html
