考虑LVRT特性的新能源送端系统功角稳定与电压稳定交互影响分析  

Analysis of interaction between power angle stability and voltage stability for sending-end system with renewable energy considering LVRT characteristics

作　　者：潘学萍[1] 黄文婷 郭金鹏 刘瑛琳 郝婧[2] 雍成立 梁伟[1] PAN Xueping;HUANG Wenting;GUO Jinpeng;LIU Yinglin;HAO Jing;YONG Chengli;LIANG Wei(School of Electrical and Power Engineering,Hohai University,Nanjing 210098,China;North China Electric Power Research Institute Co.,Ltd.,Beijing 100045,China;State Grid Huai’an Power Supply Company,Huai’an 223003,China)

机构地区：[1]河海大学电气与动力工程学院,江苏南京210098 [2]华北电力科学研究院有限责任公司,北京100045 [3]江苏省电力有限公司淮安供电分公司,江苏淮安223003

出　　处：《电力自动化设备》2024年第10期24-31,共8页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(52077061)。

摘　　要：新能源机组的低电压穿越(LVRT)能力是高比例新能源电力系统维持电压稳定的重要保证,同时LVRT期间新能源机组的功率特性将进一步影响同步发电机的功角稳定性。为分析高比例新能源送端系统功角稳定与电压稳定的耦合机理,以风电为例,推导了LVRT期间风电机组的有功-无功耦合关系;以含风电的送端系统为例,推导了故障前、故障期间以及故障后同步发电机的机械功率和电磁功率。分析了受扰后系统功角与电压的失稳形态,揭示了含风电送端系统功角稳定和电压稳定的交互影响。基于PSASP平台,仿真分析了风电初始出力水平以及LVRT参数对电力系统功角稳定和电压稳定演化的影响。The low voltage ride through(LVRT)capability is an important feature of renewable energy unit to guarantee voltage stability of power system with a high proportion of renewable energy.Meanwhile,the power characteristics of renewable energy unit during LVRT further affects the power angle stability of syn⁃chronous generators.In order to analyze the coupling mechanism between power angle stability and voltage stability for sending-end system with a high proportion of renewable energy,the active-reactive power coupling relationship of wind turbine during LVRT is deduced,and the mechanical power and electromagnetic power of synchronous generator are derived before,during,and after a fault by taking a sending-end system with wind power as an example.The instability modes of power angle and voltage are analyzed,and the interac⁃tion between power angle stability and voltage stability are revealed.The effects of wind power output and LVRT parameters on the interaction of power angle stability and voltage stability are simulated and analyzed based on the PSASP platform.

关 键 词：风电机组 低电压穿越 功角稳定 电压稳定 极限切除时间 

分 类 号：TM712[电气工程—电力系统及自动化]