从电压等级来看:本次招标一、二次设备呈现相同特征,330 kV及以上、66 kV及以下招标量呈现快速增长。主要原因是550 kV产品招标量快速提升、国网低电压等级集采比例提升。从设备分类看来:二次设备需求同比增速趋缓,继电保护招标量同比增长4.93%;变电站计算机监控系 From the voltage rating point of view: the tender of the first and second equipment presents the same characteristics, 330 kV and above, 66 kV and below the bidding showed a rapid growth. The main reason is the rapid increase of the bidding quantity of 550 kV products and the increase of the proportion of low-voltage-level aggregates in the national network. According to equipment classification, the demand for secondary equipment slowed down year-on-year, and the number of bidding for relay protection increased by 4.93% as compared with the same period of last year. The computer monitoring department of substation