Current transformer model with hysteresis for improving the protection response in electrical transmission systems

European Workshop on Advanced Control and Diagnosis

Matussek, Robert^1 ; Dzienis, Cezary^1 ; Blumschein, Jörg^1 ; Schulte, Horst^2

Siemens AG, IC SG Energy Automation, Berlin, Germany^1

HTW Berlin, Department of Engineering 1, Control Engineering, Berlin, Germany^2

关键词: Classes of protection;    CT saturation;    Electrical transmission system;    Power system protection;    Saturation effects;    Simulation studies;    Transient behavior;    Transient short-circuit current;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/570/6/062001/pdf
DOI  :  10.1088/1742-6596/570/6/062001

来源: IOP

【 摘 要 】

In this paper, a generic enhanced protection current transformer (CT) model with saturation effects and transient behavior is presented. The model is used for the purpose of analysis and design of power system protection algorithms. Three major classes of protection CT have been modeled which all take into account the nonlinear inductance with remanence effects. The transient short-circuit currents in power systems are simulated under CT saturation condition. The response of a common power system protection algorithm with respect to robustness to nominal parameter variations and sensitivity against maloperation is demonstrated by simulation studies.