GENERAL APPROACH FOR INTERNAL FAULTSREPRESENTATION OF THREE-PHASE THREEWINDINGTRANSFORMERS IN EMTP-ATP

International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering

article

Mohamed A. Abd-Elaziz¹  Ebrahim A. Badran²  Mohamed M. I. El-Shmoty² 

[1] Senior Electrical Engineer, Middle Delta Electricity Production Company, Talkha Power Station;Electrical Engineering Department, Faculty of Engineering

关键词: Transformers;    Three-Winding;    Internal faults;    EMTP-ATP;    BCTRAN;    User Specified Object (USO).;   

来源: Research & Reviews

【 摘 要 】

Transformers are one of the most important elements in power system. Most of transformers are equipped with protection systems to avoid their damage. As the transformer outage has severed technical and economical consequences for the network, so implementing fast relaying algorithms is a challenge. Therefore, modelling of various types of internal transformer faults is the objective of this study. This paper introduces a proposed approach to model internal incipient winding faults in three-phase three-winding transformers using EMTP-ATP. The User Specified Object (USO) is used for building the transformer model under fault conditions. The proposed model have the ability to change the transformer impedance matrices in a simple manner to satisfy the internal fault conditions. The internal faults in the three-windings are simulated and tested. The results show that the proposed approach is able to represent the internal faults in the three-phase three-winding transformers accurately.

【 授权许可】

Unknown