变压器绕组变形在线监测算法的改进

Improvement on on-line Monitor and Calculation about Deformation of Transformer Winding

国内外的研究和统计表明,变压器绕组变形是电力系统安全运行的一大隐患,通过测量变压器绕组短路电抗来判断变压器绕组是否变形是一种有效方法。利用在线测量变压器原、次边的电压和电流量,采用递推最小二乘法(RLS)辨识变压器的短路阻抗的方法来进行变压器绕组变形在线监测。通过仿真测试结果表明,该方法能有效监测变压器绕组变形。

It has been shown by study and account in domestic and abroad areas that deformation of transformer winding is a hidden trouble against safety operation of electric power system. By means of measuring short-circuit reactance of the winding will effectively determine whether there is any deformation of the transformer windings. The deformation of the transformer windings may be on-line monitored by measuring the voltages and currents on the prinary and secondary side of the transformer accompanied by identification of short-circuit reactance of the transformer with Recurrent Least Square(RLS). The result of simulation shows that this method can effectively monitor the deformation of transformer windings.