摘要
随着电网容量的逐渐增加,可逆式抽水蓄能电站作为电网中调峰、填谷、调频、调相和事故备用等多种用途的特殊电源,具有运行灵活和反应快速的特点,对确保电力系统安全、稳定和经济运行具有重要作用。可逆式抽水蓄能电站常规设置的启动方式是以静止变频器启动为主,背靠背启动为备用。在电网静止变频器发生故障时,采用背靠背启动是一种非常便捷的方式。以大型抽水蓄能电站背靠背启动试验为背景,阐述了抽水蓄能电站机组背靠背拖动流程、被拖动机组的开启物理过程;以实际拖动试验中遇到的问题为例,分析讨论了励磁、导叶开启过程和次同步过流保护对启动过程的影响,并结合现场调试、运行经验,提出了有针对性的解决方案,以满足机组运行的可靠性指标。
With the increasing capacity of the power grid,the reversible pumped-storage hydropower station as a special power supply with the functions of load balancing,frequency regulation and phase modulation and emergency reserve demonstrates its advantages of flexibility and quick response in ensuring the safe,stable and economical operation of the power system. Back-to-back starting serves as a convenient,alternative way to start a reversible pumped-storage station when failures occur to the static frequency converter used in the normal starting mode. Based on a test of back-to-back starting in a large pumped-storage station,the dragging process of the units and the starting process of the dragged unit are explained. The problems in the dragging test are taken as an example,and the impacts of excitation,opening process of guide vanes and sub-synchronous over current protection on the staring process are analyzed. According to the field shakedown test and operation experience,directed solutions are proposed to meet the reliability index of the units.
出处
《人民长江》
北大核心
2016年第1期95-99,共5页
Yangtze River
关键词
背靠背启动
可逆式机组
控制流程
启动过程
振荡分析
back-to-back starting
reversible pumped-storage unit
control process
starting process
analysis of oscillation
