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DC transmission grids with fault tolerant LCL VSC converters and mechanical DC circuit breakers
10th IET International Conference on AC and DC Power Transmission (ACDC 2012), 2012The introduction of HVDC light technology has been a significant step towards developing DC transmission grids. However, all voltage source converters (VSC) employed with HVDC are completely defenceless against DC faults, and significant further technical advances are required to achieve security and reliability levels that exist with AC grids.
D. Jovcic, M. Hajian, L. Zhang
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Active Damping of Ultrafast Mechanical Switches for Hybrid AC and DC Circuit Breakers
IEEE Transactions on Industry Applications, 2017An active damping method for Thomson coil actuated ultrafast mechanical switches is proposed, including its control. Ultrafast mechanical switches are crucial for both dc and ac circuit breakers that require fast-acting current-limiting capabilities. However, fast motion means high velocity at the end of travel resulting in over-travel, bounce, fatigue,
Chang Peng +6 more
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Voltage sharing between mechanical switch and IGBT in a hybrid DC circuit breaker
2017 4th International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST), 2017Hybrid DC circuit breakers have the advantages of fast fault current interruption with the solid-state semiconductor devices and low conducting loss with the mechanical switches. Therefore it is suitable to be used in the multi-terminal DC transmission system.
Wenlong Yan +5 more
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Low-cost ultra-fast DC circuit-breaker: Power electronics integrated with mechanical switchgear
2018 IEEE International Conference on Industrial Technology (ICIT), 2018The paper describes a concept for fast-acting circuit-breaker using vacuum interrupter (VI) assisted by a power-electronic converter with low output voltage. The converter excites a passive resonant circuit to create current zero-crossing in the arc in the VI to make it extinguish the current.
Lennart Angquist +4 more
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Contact Design of Arc Extinguishing Chamber in Virtual Platform of Mechanical DC Circuit Breaker
2020 5th Asia Conference on Power and Electrical Engineering (ACPEE), 2020The DC circuit breaker is used to realize fault isolation and clearing of the DC system, and is an essential core equipment for the DC distribution network. The principle of the mechanical DC circuit breaker is to generate the medium frequency oscillating current by LC and reversely inject into the main circuit to form a current zero crossing point ...
Can Ding, Dengping Tang, Xiaojian Tian
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Identification of Key Mechanism Behind Arc Re-Ignition in LC Commutator-Based DC Circuit Breakers [PDF]
2024 7th International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST)High Voltage Direct Current (HVDC) systems, crucial for renewable energy and long-distance transmission, en-counter DC fault management challenges due to absent natural zero crossings and rapid fault propagation, causing energy dissipation and re-ignition issues during DC interruption.
Nan, Jing +2 more
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Active damping of ultra-fast mechanical switches for hybrid AC and DC circuit breakers
2016 IEEE Energy Conversion Congress and Exposition (ECCE), 2016An active damping method for Thomson coil actuated ultra-fast mechanical switches is proposed, including its control. Ultra fast mechanical switches are crucial for both DC and AC circuit breakers that require fast-acting, current-limiting capabilities.
Chang Peng +5 more
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Review of Scientific Instruments
Amplified piezoelectric actuators have gained considerable attention due to their inherent advantages, including rapid response, reliability, and efficiency, making them promising candidates for Direct Current (DC) switching applications. They can operate in two distinct operational modes: Block–Free (B–F) and Free–Free (F–F) configurations.
Mohmmad Al-Dweikat +3 more
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Amplified piezoelectric actuators have gained considerable attention due to their inherent advantages, including rapid response, reliability, and efficiency, making them promising candidates for Direct Current (DC) switching applications. They can operate in two distinct operational modes: Block–Free (B–F) and Free–Free (F–F) configurations.
Mohmmad Al-Dweikat +3 more
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2023 IEEE 68th Holm Conference on Electrical Contacts (HOLM), 2023
Patrick Vieth +3 more
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Patrick Vieth +3 more
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Interruption Characteristics of Hybrid DC Circuit Breaker Based on Intelligent Mechanical Branch
2023 5th International Conference on Power and Energy Technology (ICPET), 2023Jianning Yin +4 more
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