Simulation study reveals critical current and voltage parameters in hybrid on-load tap changers, indicating performance challenges.
The thyristor-assisted arc-quenching hybrid on-load tap changer (OLTC) integrates the benefits of both mechanical and power electronic OLTCs, utilizing anti-parallel thyristors to aid in mechanical contact switching. However, this hybrid OLTC faces challenges such as high di/dt during thyristor conduction and significant peak voltages and du/dt at thyristor turn-off. This paper presents a simulation study on the transient current and voltage characteristics during thyristor conduction and natural turn-off. It also determines key technical parameters like the critical du/dt and di/dt for the thyristor in a 35 kV hybrid OLTC.
No takes yet. Share an insight, caveat, or question.
Zhu et al. (2025) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: