一种用于继电保护状态评价的大数据精简方法

A Big Data Simplification Method for Evaluation of Relay Protection Operation State

在线评价继电保护系统状态是保障继电保护在故障来临时正确动作的重要手段。继电保护信息系统具有大数据特征,但受制于数据传输堵塞、数据源不同步、缺乏智能分析工具等问题,难以用于进行继电保护状态在线自动评价。基于减少继电保护信息系统数据上传和处理规模的需求,提出基于保护内部加工信息进行保护状态评价数据精简的思路,构建反映继电保护系统状态特征的精简数据指标集,并提出利用该精简指标数据对继电保护进行在线状态评价的方法。利用所提方法可使继电保护子站仅实现少量信息传输即可为主站实现继电保护系统运行状态分析获取足够信息。在保障评价效果的同时,大大减少数据上传量和评价时间,为进一步在输变电环节合理利用电力大数据提供参考。以某典型220 k V变电站为例,验证了所提方法在减少数据上传量、快速完成设备状态评价的优势。

Online evaluation is an important mean to make sure relay protection system did the correct action when a fault occurs. Relay protection information system has Big Data characteristics, it＇s hard to use so much data directly for relay protection system online evaluation, because of data transfer blockage, unsynchronized data source, lack of intelligence analysis tools. Based on the demand of reducing the processing amount of relay protection information data, this paper proposed a state assessment data reduction ideas based on the process information of internal protection, constructed simplified data index set that could reflect the characteristics of relay protection operation state, and built relay protection online evaluation method using simplified data index. By using simplified index and evaluation model, it can provide enough information for master station, and use less information transmission to realize state analysis. While ensuring the effect of evaluation, this method reduces upload amount of data and evaluation time, provides a reference for the further use of Big Data in power transmission and transformation aspects. The proposed method is verified by a typical 220 k V substation, which has proved the superiority on reducing upload amount of data and fast evaluation of relay protection devices.