Investigation on the DC CB Performance during a Current Interruption Failure at First Current Zero

Conference paper (2018)

Authors

S. Liu Xi’an Jiaotong University

Yingsan Geng Xi’an Jiaotong University

M. Popov Intelligent Electrical Power Grids -

Jianhua Wang Xi’an Jiaotong University

Zhiyuan Liu Xi’an Jiaotong University

Bojian Zhang Xi’an Jiaotong University

Research Group

Intelligent Electrical Power Grids () (TU Delft)

DOI: https://doi.org/10.1109/DEIV.2018.8537159

HVDC circuit breaker Active injection Di/dt Fault interruption PSCAD simulation

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Published Date

2018

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Electrical Sustainable Energy

Research Group

Intelligent Electrical Power Grids

Abstract

The vacuum interrupter is used as the key component of an active DCCB due to its excellent interruption and dielectric recovery characteristics after current zero. The vacuum interrupter can only interrupt the fault currents below the limitation of a critical di/dt and TIV, otherwise it causes a reignition and the interruption failure. In this paper, a detailed active injection DC CB model is developed, considering operation delay of switches, parasitic parameters of switches and thorough control logic. The limitation dielectric strength between the vacuum gap is defined by the cold break down voltage. Based on the numerical modelling, investigation will be performed to see the performance of DC CB with a failure interruption on the first current zero. The simulation results can help to optimize the injection circuit parameters when DC CB has a failure on the first current zero and has to interrupt in the next current zeros. This algorithm will consider predefined threshold of di/dt, chopping current and variable operation time in different scenarios.

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