1. Operation and transient performance of a four-terminal MMC based DC grid implementing high power mechanical DC circuit breaker
- Author
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Xia Chen, Jinyu Wen, Zhao Yuan, Wang Xiang, and Binye Ni
- Subjects
Computer science ,power overhead lines ,020209 energy ,Overhead (engineering) ,Energy Engineering and Power Technology ,02 engineering and technology ,hybrid dccb ,Fault (power engineering) ,high capital cost ,mechanical dccb ,four-terminal mmc based dc grid ,power transmission control ,mechanical type dccb ,Power electronics ,0202 electrical engineering, electronic engineering, information engineering ,Electronics ,hybrid type dccb suffers ,Circuit breaker ,four-terminal bipolar mmc-hvdc system ,business.industry ,high power mechanical dc circuit breaker ,020208 electrical & electronic engineering ,controlled power electronic devices ,General Engineering ,Electrical engineering ,transient performance ,fault diagnosis ,Grid ,power grids ,power industry ,hvdc power transmission ,Power (physics) ,power electronics ,hvdc power convertors ,lcsh:TA1-2040 ,Transient (oscillation) ,business ,circuit breakers ,immature dc circuit breaker technology ,lcsh:Engineering (General). Civil engineering (General) ,Software - Abstract
Recently, there has been significant interest in developing the modular multilevel converter (MMC) based DC grids in the power industry. However, the immature DC circuit breaker (DCCB) technology hampers the development of DC grids in overhead lines transmission field. The full controlled power electronic devices based hybrid DCCB has been proposed and researched substantially. But the hybrid type DCCB suffers from the drawback of high cost and low reliability, leading to high capital cost for DC grids that require numerous DCCBs. In this paper, a mechanical type DCCB, consisting of a mechanical switch, a circuit and an oscillation circuit, is proposed. Then, a four-terminal bipolar MMC-HVDC system implementing the mechanical DCCBs is studied. Extensive simulations have been conducted to analyse the transient performance under different fault conditions. The simulation results verify the technical feasibility of this mechanical DCCB in DC grid.
- Published
- 2019
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