根据上海电网即将分层分区运行的情况 ,分析分区电网的特点 ,指出当前低周减载不能适应网架分层分区的要求 ,并提出改进措施。 According to the situation that Shanghai Power Grid will be operating in different stages and zones, the characteristics of zonal power grids are analyzed. It is pointed out that the current low-cycle load shedding can not meet the requirements of grid zoning and propose improvement measures.