为了研究导前时间对抽水蓄能机组同期并网的影响,对同期装置的原理及组成进行了分析,为防止同期装置的主中央处理器(central processing unit, CPU)误发合闸脉冲,导致机组在较大的电压相角差时并网,同期装置需要采用设置辅CPU或同期检查继电器等方法进行电压相角差限制。通过解析法得到了导前时间与电压相角差限制值的关系；采用同期装置静态试验的方法验证其正确性；并应用其成功解决了某电站机组同期并网时刻,电压相角差不满足设计要求的问题；对抽水蓄能机组同期装置参数设置具有指导意义。
英文摘要:
In order to investigate the influence of leading time on the synchronizing parallel, the principle and units of the synchronizing device are analyzed. A sync check relay or auxiliary central processing unit (CPU) is normally used to limit the phase difference, in case of an error made by the main CPU leading to the non-synchronizing parallel. The relationship between leading time and the limiting value of the phase difference is presented by using analytical method, and validated by static test of the synchronizing device. The research result has been applied in a pumped-storage unit to solve the synchronizing device problem successfully,which will be a guide to synchronizing device parameter settings.