摘要
针对小水电地区传统备自投存在的不足之处:长时间等待母线失压,以解列所有小电源为代价,恢复供电需要很长时间,在研究自动捕捉准同期、高周切机等原理基础上,提出了一种适用于小电源地区的智能型备自投方案,即在枯水期选择快速联切水电的备自投模式;在丰水期则选择为高频逐轮切机、准同期合闸的备自投模式,以达到快速恢复地区供电的目的。该方案已在备自投装置中实现,并利用近几年的故障录波数据以及电网运行参数对装置进行了模拟实验。实验证明,这种智能型备自投的使用能有效地提高电网安全稳定性和供电可靠性。
In small hydroelectric power system, conventional automatic bus transfer equipment has the defects of needing more time to detect bus non-voltage, at the cost of islanding all the small hydroelectric power and taking a long time to restore power supply. Based on the theory of automatic synchronous capture and high-frequency generation shedding, an intelligent automatic switching scheme suitable for tie-line in small power source area is put forward. According to this method, automatic bus transfer mode of islanding the small hydroelectric power quickly is selected in low water period, while automatic bus transfer mode of high frequency generator tripping round by round and automatic synchronous capture reclosure in high flow period, which enables regional power supply to restore quickly. This method has been used in automatic bus transfer equipment. Furthermore, simulated experiment using fault recorded data in recently years and parameters of power system has been made. Experiments proved that the new method can improve the stability of the grid and the reliability of power supply.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2010年第8期120-122,127,共4页
Power System Protection and Control
基金
广东电网公司2009年科技项目
关键词
小水电
智能
准同期
备自投
small hydroelectric power system
intelligent
quasi-synchronous
automatic bus transfer equipment
