Transformer loss level online monitoring method and device

The invention discloses an online monitoring method and device for the loss level of a transformer. The method comprises the following steps: S1, establishing a loss related parameter numerical model of the transformer; s2, establishing a loss calculation model; s3, acquiring loss-related parameters from the loss-related parameter numerical model in real time; and S4, calculating the real-time loss level of the transformer according to the loss related parameters and the loss calculation model. According to the method, the loss calculation model is constructed, the loss related parameter values acquired in real time are input into the loss calculation model for loss calculation, and on-line monitoring of the loss level of the transformer can be realized by using the existing watt-hour meter and the current transformer on the premise of not additionally adding power system sampling equipment. 本发明公开了一种变压器损耗水平在线监测方法及装置，所述方法包括步骤：S1、建立变压器的损耗相关参数数值模型；S2、建立损耗计算模型；S3、实时从损耗相关参数数值模型中获取损耗相关参数；S4、根据损耗相关参数、损耗计算模型，计算变压器的实时