DC Line Fault Identification Based on Pulse Injection From Hybrid HVDC Breaker

The half bridge modular multilevel converter (MMC) coordinated with dc circuit breakers (DCCBs) is one of the most promising solutions for the future multi-terminal HVdc system protection. After the isolation of dc line fault, the electrical quantities of the dc system remain stable and no coupling...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on power delivery 2019-02, Vol.34 (1), p.271-280
Main Authors: Song, Guobing, Wang, Ting, Hussain, Kazmi S.T.
Format: Article
Language:English
Subjects:
Active injection
Adaptive systems
Capacitors
Circuit breakers
Circuit faults
Computer simulation
Converters
Couplings
dc transmission line fault
Electric bridges
Electric potential
Electric power transmission
Fault diagnosis
fault identification
Fault location
HVDC transmission
hybrid HVDC breaker
Solid state devices
Voltage control
Voltage pulses
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The half bridge modular multilevel converter (MMC) coordinated with dc circuit breakers (DCCBs) is one of the most promising solutions for the future multi-terminal HVdc system protection. After the isolation of dc line fault, the electrical quantities of the dc system remain stable and no coupling relationship exists between healthy and faulty poles. Thus, ac adaptive reclose scheme is difficult to be applied in dc transmission systems since the information of the adjacent lines cannot be used to assess whether the line fault is cleared or not. An innovative adaptive reclose scheme applied to the MMC-HVdc system is proposed in this paper by injecting voltage pulses to the faulty line. When the breaker is tripped, the converter and dc faulty line are connected by the main breaker of the hybrid HVdc breaker. On the basis of switching control of solid-state devices in the main breaker, the voltage pulse injection to the dc faulty line is realized. Then, the fault characteristic is identified based on the traveling-wave-based fault location algorithm. A fast restart scheme for the MMC-based bipolar HVdc transmission system is also achieved by this method. The simulation results verify the effectiveness of the proposed method.
ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2018.2865226