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Halimi A. Introduction and review of Transient Recovery Voltages and its case simulation in EMTP_RV software. JOTS 2024; 1 (1) :61-85
URL: http://jots.knu.edu.af/article-1-26-en.html

Transient recovery voltage (TRV) is one of the characteristics inherent in the power system, and its maximum and increasing speed are important factors that affect the switching process in the power system. When a power system has characteristics of TRV, it means that the voltage is higher than the tolerance range of the switches and the circuit breakers may not interrupt the fault current. In this article, the types of overvoltages in the power system have been investigated first. In the following, overvoltages caused by switching (an important phenomenon in the power network) are introduced. The importance of investigating this issue is the effect of these overvoltages during the operation of power switches, which are affected by the existence of different structures, the occurrence of different errors with different waveforms and structures due to the complexity of power networks. The presence of these different waveforms will have a direct effect on the performance of the power switches, which may not be able to withstand these stresses and the circuit may fail. On the other hand, the failed operation of the keys in error conditions will have the possibility of causing damage to the network during critical conditions. In the continuation of this research, in order to observe the stresses resulting from keying, case simulation has been done in EMTP_RV transient mode software.