快速功率波动下大型定/变速机组的响应特性研究  

Response characteristics of large fixed-speed and variable-speed pumped-storage units under fast power fluctuations

作　　者：汪玉清 周大庆[1] 冯陈 WANG Yuqing;ZHOU Daqing;FENG Chen(College of Electrical and Power Engineering,Hohai University,Nanjing 211100,China)

机构地区：[1]河海大学电气与动力工程学院,南京211100

出　　处：《水力发电学报》2024年第10期76-84,共9页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金(51979086)。

摘　　要：本文对定速机组和变速机组应对快速功率波动时的响应情况进行了对比仿真,研究了九种不同大小、不同频率的功率波动下定速机组和变速机组的响应情况,并利用功率差的平均值、标准值、功率上升(下降)响应时间的平均值、功率延迟时间这四个量化评估指标对定速机组和变速机组的功率响应特性进行了具体分析。结果表明变速机组不仅能有效应对秒级时间内快速波动的新能源出力,对快速新能源出力波动的响应能力也远优于传统定速机组,进一步说明了变速机组应对新能源波动的有效性。This study compares the responses of large fixed-speed and variable-speed pumped-storage units to fast power fluctuations through numerical simulations.We examine their response characteristics under power fluctuations of nine sets different in amplitude and frequency.The power response characteristics of the units are analyzed using four quantitative evaluation indicators-mean and standard deviations of power differences,mean response time for power rise(fall),and power delay.The results show that variable-speed generating units not only effectively respond to rapid fluctuations in the renewable energy output within seconds,but their response capabilities are superior to those of traditional large fixed-speed pumped-storage units.This further emphasizes the importance of variable speed units in coping with renewable energy fluctuations.

关 键 词：可变速抽水蓄能机组 快速功率控制 功率优先控制 功率评估指标 动态特性 

分 类 号：TK73[交通运输工程—轮机工程]