一种配电变压器热评估方法

针对配电变压器运行中的负荷特殊性和热传递微分方程参数难以确定的问题,提出了一种配电变压器热评估方法,分析了配电变压器热传递的动态过程,指出了传统神经网络难以适用于配电变压器热评估当中,考虑配电变压器三相负载系数,建立了配电变压器LSTM型循环神经网络热评估模型,对配电变压器顶层油温进行预测,达到配电变压器热评估的目的。算例表明:预测结果比热传递微分方程更接近实际情况,验证了该方法的有效性和实用性。

A Thermal Evaluation Method of Distribution Transformers

With respect to the load speciality of distribution transformers and uncertainty of thermal transmission differential equation parameters, a thermal evaluation of distribution transformers is proposed, in which the dynamic process of thermal transmission in distribution transformers is analyzed, and an idea that traditional neural network is hard to go for thermal evaluation of distribution transformers is raised. When considering three-phase load factors of distribution transformers, the LSTM Type Recurrent Neural Network model of distribution transformers thermal evaluation are established, the top layer oil temperature of distribution transformers is predicted so that the thermal evaluation of distribution transformers are achieved. The calculating example indicates that the predicting outcome method this paper used goes more closer to the practical situation than thermal transmission differential equation, in this way the validity and practicability of the method in the paper is verified.