关键词: 配电网, 故障定位, 通信, 通用分组无线业务（GPRS）

Abstract: In a GRPS-based fault location system (GRPS: general packet radio service), if a DTU (data transfer unit), which has already built the communication with its data centre, doesn’t send data to the data centre for a long time, the built communication will emerge off-line phenomenon. Generally, the heart-beat packet method is used to reduce the frequency of off-line phenomenon and enhance its ability of on-line communication. But, some types of DTUs don’t have the heart-beat packet function. To solve the problem, an intermittent communication method was proposed,which is reverse to the method based on “heart-beat” package and works by asking the DTUs to keep in touch from the data center, thus making the off-line problem solved. Moreover, the intermittent communication method was integrated into the fault analysis software(FAS) of the data center through programming, which make the FAS has the ability to enhance on-line communication ability of DTU. Finally, the experiment data and analysis verified the effectiveness of the proposed method.

Key words: distribution network, fault location, communication, general packet radio service (GPRS)