多参信息量的智能变电站继电保护二次回路隐藏故障检测方法

Hidden Fault Detection Method for Secondary Circuit of Relay Protection in Intelligent Substation with Multi Parameter Information

当前变电站继电保护隐藏故障检测节点的设定一般为单层级,检测针对性不强,导致检测重叠误差增加,为此提出多参信息量的智能变电站继电保护二次回路隐藏故障检测方法。综合故障检测的需求及标准,先提取基础故障检测特征,设计继电保护二次回路定向故障识别结构,构建多层级的检测形式,部署具体的故障检测节点位置,提升异常位置检测的整体针对性,以此为基础,建立多参信息量二次回路隐藏故障检测模型,采用二次回路多参信息量映射修正实现隐藏故障检测。测试结果表明,多参信息量继电保护二次回路隐藏故障检测组最终得出的故障检测重叠误差相对较小,均控制在0.2以下,说明在故障检测过程中,检测的速度及质量较高,检测范围较大,误差可控,具有实际的应用价值。

The setting of hidden fault detection node for relay protection in substations is generally single-layer at present,and the detection pertinence is not strong,which leads to the increase of detection overlapping error.Therefore,the design and analysis of hidden fault detection method for relay protection secondary circuit in intelligent substations with multi parameter information is proposed.Based on the requirements and standards of fault detection,the basic fault detection features are extracted,the directional fault identification structure of the secondary circuit of relay protection is designed,a multi-level detection form is constructed,and the specific fault detection node location is deployed,which improves the overall pertinence of abnormal position detection.Based on this,a hidden fault detection model of multi-parameter information secondary circuit is established,and the hidden fault detection is realized by using the secondary circuit multi-parameter information quantity mapping correction.The test results show that the overlapping error of fault detection finally obtained by the multi-parameter information relay protection secondary circuit hidden fault detection group is relatively small,and all are controlled below 0.2,indicating that in the process of fault detection,the detection speed and quality are high,the detection range is large,the error is controllable,and it has practical application value.