输电线路高阻接地故障的建模研究

Transmission Line of High Resistance Earth Fault Modelling Research

高阻接地故障(HIF)检测方法的研究难点在于其模型精确度的问题。为了解决该问题,本文定义了HIF特征及性质,并针对传统改进的伊曼纽尔模型和电弧模型反映HIF特征的不足,基于实测数据和物理现象,通过数值计算等方法建立了一个新模型。该模型模块简单、仿真速度快、参数容易调整。在EMTP环境下进行仿真验证,结果表明,HIF特征明显,并分析了模型误差来源。

The difficult point of the high impedance fault（HIF） detection method is how to ensure its model accuracy. In order to solve this problem, this paper defines the characteristics and properties of HIF.Then aiming at the insufficient of the traditional Emanuel model and arc model, based on the measured data and physical phenomena and numerical calculation method, this paper establishes a new model. The model of simulation is simple and fast and the parameters are easy to adjust. Under the environment of EMTP simulation, the results show that the characteristic of HIF is obvious and then this paper analyzes the model error sources.