基于逻辑回归的高压并联电抗器过流误报警判别方法

Discrimination Method Based on Logistic Ｒegression for False Overcurrent Alarm of High － voltage Shunt Ｒeactor

摘要:

在分析互感器测量误差对高压并联电抗器过流报警精度影响的基础上，提出了基于逻辑回归分析的高压并 联电抗器过流误报警判别方法。该方法对高压并联电抗器的电压和报警信号数据进行逻辑回归分析。针对仪表测 量精度低的问题，根据回归系数定义了两种误报警准则。以某实际 500 kV 输电线路高压并联电抗器为例，采用实测 数据和仿真数据进行验证。实例研究结果表明，该方法能快速识别高压并联电抗器的过流报警精度，并且不需要停 电试验或额外增加测量设备，具有很高的工业应用价值。

Abstract:

The influence of transformer measuring error on overcurrent alarm accuracy of high － voltage shunt reactor is analyzed． And then，a discrimination method of false overcurrent alarm for high － voltage shunt reactor is proposed based on logistic regression． The method is used to analyze the relationship between the measuring voltage and alarm signal of high － voltage shunt reactor with logistic regression model． Considering the low precision of instrument measurement，two false alarm criteria are defined with regression coefficient． Taking a practical high － voltage shunt reactor of 500 kV transmission line for example， it is verified by both the actual measured data and simulation data． The results show that the proposed method can rapidly identify the overcurrent alarm accuracy of high － voltage shunt reactor． And also the method does not need outage test or additional measuring equipment，so it has a high industrial application value．