一种快速响应直流限流器拓扑结构与参数设计

doi:10.19595/j.cnki.1000-6753.tces.200135

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Abstract The current limiting DC circuit breaker combined with fault current limiter will become a new trend of the development of DC circuit breaker towards high breaking capacity. However, the current permanent magnet saturated fault current limiter has the problem of prolonging the falling time of fault current. In this paper, a new type of fast response DC current limiter is proposed based on the topology optimization of the permanent magnet saturated fault current limiter. This paper proposes an auxiliary branch by magnetic coupling with the topology of the original current limiter, which can eliminate the negative effect that prolongs the falling time of fault current when the current limiter is disconnected and accelerate the breaking process. Moreover, it can reduce the peak value of over-voltage in the process of breaking, thereby protecting the fully controlled power electronic devices of high cost in the DC circuit breaker. At the same time, it can greatly reduce the energy absorption stress of the DC circuit breaker energy absorption branch and further reduce the manufacturing cost of the DC circuit breaker energy absorption branch. The new type of current limiter can operate adaptively in the whole process without triggering the control device, and its response is also more direct and rapid than the traditional current limiter. The diode is on the low-voltage side, which reduces the insulation cost. The working principle of the new current limiting DC circuit breaker is introduced through theoretical analysis, and the design requirements for the main electromagnetic parameters are analyzed by mathematical derivation. The feasibility of the scheme is verified by the combination of magnetic circuit finite element simulation and circuit simulation. A small capacity test prototype is designed. The comparison between the field test and the small capacity simulation shows that the new fast response current limiter can effectively improve the current drop speed.

Key words： Permanent magnet saturation type fault current limiter DC circuit breaker energy absorption stress magnetic coupling fast response

Received: 14 April 2020

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TM561

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	Articles by authors
	Yuan Jiaxin
	Chen Hechong
	Chen Fan
	Zhang Zhewei

Cite this article:

Yuan Jiaxin,Chen Hechong,Chen Fan等. Topology and Parameter Design of a Fast Response DC Current Limiter[J]. Transactions of China Electrotechnical Society, 2021, 36(8): 1646-1657.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.200135 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/I8/1646

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