Coordinative performance of HVDC circuit breakers in MTDC grids

Liu, S.; Shetgaonkar, Ajay; Popov, M.

doi:10.1109/PESGM41954.2020.9281921

Coordinative performance of HVDC circuit breakers in MTDC grids

Conference paper (2020)

Authors

S. Liu Intelligent Electrical Power Grids - , Xi’an Jiaotong University

Ajay Shetgaonkar Student

M. Popov Intelligent Electrical Power Grids -

Research Group

Intelligent Electrical Power Grids () (TU Delft)

DOI: https://doi.org/10.1109/PESGM41954.2020.9281921

HVDC circuit breaker Circuit breaker performance DC grid protection Offshore windfarm

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Published Date

2020

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 objective of this paper is to investigate the coordinative performance of different types of high voltage DC (HVDC) circuit breakers (CBs) in multi-terminal DC (MTDC) grids. Several different HVDC CB technologies are emerging as a solution for the protection of offshore MTDC grids. There is a need for coordinative operation between different types of DC CBs in the same network. In this paper, two typical types of DC CBs are modelled in detail and implemented in a 4terminal MTDC grid in PSCAD environment, by considering operation time, interruption capability and interruption characteristics. Since the requirement of the DC CBs depends on the magnitude of the interrupted current where they are implemented, the fault scenarios in all terminals are studied and the worst scenarios are selected to demonstrate the coordinative performance of different DC CBs. Four cases are defined and demonstrated by two different types of CBs at each terminal of the cable. DC CBs perform differently with the change of the operating time and the locations where they are implemented. The performances and energy absorption are compared and analyzed. The obtained results can be used as DC CB’s selection optimization methodology for future MTDC grids.

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