就地化分布式变压器保护方案研究

摘要

提出了一种适合就地化变压器保护的有主分布式环形网络及其同步方案,按断路器配置保护子机,变压器本体子机兼作保护主机,直接采用常规采样、常规跳闸模式,对外连接全部采用预制的航空插头.主变本体子机利用IEEE 1588网络对时协议实现各侧子机模拟量的同步采集,各侧子机采样数据发送到主变本体子机,由主变本体子机完成全部保护及MMS通信等功能.保护动作后,主变本体子机发出GOOSE跳闸命令,各侧子机收到GOOSE命令后跳开本侧开关.此方案可以使110 kV及以上电压等级变电站所有保护装置满足就地化安装的要求,取消保护小室,减少新建变电站占地面积.%This paper proposes a distributed network with master-slave structure and its synchronization scheme suitable for outdoor installation transformer protection,in which sub protection machines are configured with transformer breakers,transformer body sub machine is also used as the protection master,conventional sampling and tripping mode are adopted directly,and all of the external connections uses the prefabricated aviation plugs.The master transformer protection machine uses IEEE 1588 network synchronization protocol to realize the synchronous data sampling of each side sub protection machine,and with the data from other sub machines,the master protection machine achieves all of the protection functions and MMS communication.The master transformer protection machine sends out tripping GOOSE commands when the protection acts,and each side sub protection machine parses the receiving tripping command to cut the breaker of its side.This scheme allows all of the protection devices in the 110 kV and above voltage level substations to meet the requirements of outdoor installation,cancels protection's closet,and reduces the floor area of newly built substation.