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

Research and Technology in the Electrical Industry Pub Date : 2022-03-01 DOI:10.52547/ijrtei.1.1.10

AmirHossein Taheri Jam, R. Mohammadi Chabanloo, Ehsan Bagherzadeh, H. Askarian Abyaneh, Mojtaba Mohammadi Nasiri

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Abstract

Article history: Received 27 November 2021 Received in revised form 16 February 2022 Accepted 24 February 2022 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.

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基于端电压的过流继电器协调感应发电机暂态稳定性研究

文章历史:接收2021年11月27日接收2022年2月16日接收2022年2月24日如今，随着感应发电机(IG)在电网中的渗透率越来越高，在故障条件下将IG连接到电网非常重要。本文提出了一种基于终端电压的IG暂态稳定性研究方法。为此，采用一种改进的解析方法确定了电网故障状态下(包括近故障和非近故障)IG的临界清除时间(CCT)。对于发生在远离发电机端子的故障，故障时电磁转矩不等于零。因此，我们使用IG和网络的等效电路模型来计算CCT。为了防止过电流继电器在电网故障情况下断开，提出了一种基于过电流继电器终端电压的新公式，考虑了过电流继电器协调的稳定性约束。在两个样本网络上进行了仿真，结果证明了该方法的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Research and Technology in the Electrical Industry

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