光伏低电压穿越测试对电网影响分析与试验  

Analysis and Experiment on the Effect of Photovoltaic LVRT Testing on the Grid

作　　者：郑飞[1] 丁明昌[1] 

机构地区：[1]中国电力科学研究院,江苏南京210003

出　　处：《电力电子技术》2013年第10期35-36,共2页Power Electronics

基　　金：中国电力科学研究院科技项目(NY84-13-003)~~

摘　　要：通过等效电路分析,推导光伏低电压穿越(LVRT)测试对电网电压波动的影响机理。该等效电路包括光伏并网发电单元正常运行和LVRT测试两种工况。揭示了电网短路容量、被测光伏并网发电单元容量、LVRT深度等与电网电压波动的关系。最后,给出多种跌落深度的LVRT现场试验结果。The internal mechanism on the effect of photovohaic low voltage ride through（LVRT） testing on the grid is derived by the analysis of equivalent circuits.The equivalent circuits include two conditions of normal operation and LVRT testing of the photovoltaic grid-connected power generation unit.The relationship between the short-circuit ca- pacity of the power grid, tested photovoltaic grid-connected power generation unit capacity, LVRT depth and the grid voltage fluctuation is revealed.Finally, the results of LVRT field tests with several sag depth are given.

关 键 词：光伏发电 低电压穿越 电压波动 

分 类 号：TM614[电气工程—电力系统及自动化]