抽水蓄能机组几种特殊发变组保护整定配置原则探讨

通过对张河湾抽水蓄能电厂发电机变压器保护整定定值的计算,对照国内其他省网抽水蓄能机组的发变组保护整定情况,发现许多具有共性的问题,提出了对发电机及变压器大差保护用其开环分支短路电流校核选择性的观点,以及对水泵电动机工况低频过电流保护选择基准电流的原则,对发电机开关失灵保护进行了分析,并给出合适的逻辑配置,对励磁变压器系统中存在接地故障的保护盲区进行了分析探讨并提出补救措施.

Setting Principle Analysis on Some Particular G-T Protections Adopted by Pumped Storage Units

After the recalculation and comparison of G-T relay protection settings and principles adopted by ZHW pumped storage units with the protections used by other domestic pumped storage units,many similar problems are found. The view of checking selectivity of such kind of protection by the short-circuit current at its open branch is proposed,and the principles for selecting the base current for the low-frequency over-current protection when the unit is working at the pumping mode is also presented in this pape...