基于铁锂电池的非浮充式变电站直流电源系统

Non-floating DC Supply System in Substation Based on Ferric Phosphate Lithium Cell

磷酸铁锂电池以其优异性在国内电力系统得到越来越多的应用,但目前国内采用铁锂电池的变电站直流电源系统只是简单的把铅酸电池换成铁锂电池,既没遵守铁锂电池的充、放电特性,还会加速铁锂电池的容量衰退和减少运行寿命,使其性价比大大降低。为解决以上问题,研究出一种基于铁锂电池的非浮充式变电站直流电源系统,正常时充电装置只供经常性负载,需要时对电池组再补充充电的非浮充电方式。

Because of the excellent performance of ferric phosphate lithium cells, it has been greatly applied to domestic power system. However, the substations who adopt ferric phosphate lithium cells just simply substitute lead -acid batteries with fer- ric phosphate lithium cell, it doesn＇t consider the charging and discharging characteristics of ferric phosphate lithium cells, and it will accelerate the capacity fading of ferric phosphate lithium cells and reduce its service life so as to cut down its per- formance/price ratio. In order to solve the problems as mentioned above, the non -floating method based on ferric phosphate lithium cell is studied for DC supply system in substation, that is, the batteries will not be supplied until needed by the char- ging device which is only for regular load in normal condition.