背靠背直流输电工程网络损耗监测系统研究与实现

为实现背靠背直流输电工程损耗的实时在线监测,文中设计了一套网络损耗监测系统,主要包括损耗监测装置和上位机软件平台两部分。该损耗监测装置基于两种数据采集方案,能够适应不同工程现场的需求,兼容多种类型的交、直流信号,实现整流侧与逆变侧、交流侧与直流侧的数据时间同步,彻底消除多台电能计量设备之间的误差一致性问题,达到系统各部分损耗的高精度实时监测;上位机软件能够对大量数据进行显示、存储和统计分析,为故障预警、告警、系统健康状态评估提供数据支撑,还能为供电部门基于大数据进行损耗预测提供统计数据。该系统对多种类型的直流输电工程网络损耗监测均具有实际意义。

Research and realization of transmission loss monitoring system of back-to-back DC transmission project

In order to realize the real-time online monitoring for back-to-back DC transmission project losses,this paper designed a network loss monitoring system,which mainly contains loss monitoring device and host computer software platform.The loss monitoring device,based on two kinds of data collection schemes,can adapt to the needs of different projects and be compatible with lots of types of AC and DC signals,thus realizing the time synchronization between rectifier side and inverter side,and AC side and DC side,which completely eliminates the problem of deviation inconsistency between multiple energy metering devices,therefore,the high-precision real-time monitoring of loss of various parts of the system can be achieved.The host computer software can display,store and statistic analysis large amounts of data,thus providing data support for malfunction warning,alarm,health status assessment,and it also can provide statistical data for power supply department to make loss prediction based on big data.This system is of practical significance for network loss monitoring in many types of DC transmission projects.