Overcurrent Relays Coordination Considering Transient Stability Study of Induction Generator Using a Method Based on Terminal Voltage

Taheri Jam, AmirHossein; Mohammadi Chabanloo, Reza; Bagherzadeh, Ehsan; Askarian Abyaneh, Hossein; Nasiri, Mojtaba

doi:10.52547/ijrtei.1.1.10

Overcurrent Relays Coordination Considering Transient Stability Study of Induction Generator Using a Method Based on Terminal Voltage

Document Type : Research Article

Authors

AmirHossein Taheri Jam ¹

Reza Mohammadi chabanloo ¹

Ehsan Bagherzadeh ¹

Hossein Askarian Abyaneh ²

Mojtaba Nasiri ²

¹ Electrical Engineering Department, Shahid Beheshti University, Tehran, Iran

² Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran

10.52547/ijrtei.1.1.10

Abstract

Nowadays, with increasing penetration of Induction Generators (IG) in the electricity grid, it is of great importance that IG be connected to the grid in the fault conditions. In this paper, a terminal voltage based method for transient stability study of IG is proposed. For this purpose, an improved analytical method is used to determine Critical Clearing Time (CCT) of IG in the state of grid fault, including near and non-near faults. For the faults occurring far from the terminal of generator, electromagnetic torque is not equal to zero during fault. Hence, equivalent circuit model of IG and network is used to calculate the CCT. A new formulation based on terminal voltage of IG is presented to consider the stability constraint on Over Current Relay (OCR) coordination, to prevent disconnecting of IG in grid fault condition. Simulations are carried out on two samples network, and the results demonstrate the efficiency of proposed method.

Keywords

Induction generator

Transient stability

Grid fault

OCR coordination

Genetic algorithm