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The Design and Research of a New Topology Fault Current Limiter

Author: LiuKeDong
Tutor: LiXiaoMing
School: Shandong University
Course: Proceedings of the
Keywords: saturated iron-core FCL iron-core structure short-circuit current DC control circuit optimal design
CLC: TM471
Type: Master's thesis
Year: 2010
Downloads: 103
Quote: 0
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Abstract


The expansion of the scale of the regional network and improvement of the power networking lead to sharply increase in short-circuit current after the fault occurred, and then the security and stability of power grid would be threatened, so it is imperative to take a proper measure to limit the short circuit current. In principle, the fault current limiter has excellent characteristics, and it became a popular researching focus in the field of power system.This paper proposes a new topology of the saturated iron-core type fault current limiter, and the theoretical analysis & design and simulation were carried out. Main works are as follows:Firstly, the developing and researching status in quo of fault current limiter is introduced. On the basis of the analysis of the principle of saturated iron core FCL, and some researches of the saturated iron core type limiter which researching more such as superconducting saturated iron core FCL and permanent magnet saturated iron core FCL, presents a new topology of the saturated iron-core type fault current limiter, analyzes its working principle and establishes its mathematical model, and some related issues about its application in the grid were analyzed.The new topology fault current limiter was designed. Include:Discussed the selection of the iron-core materials, considered the iron-core materials on the properties and structure size, and analyzed the composition of several three-phase saturated iron-core. The iron-core parameters and physical parameters were designed, based on the iron core saturation characteristics. Presented a new topology DC control circuit, and elaborated its characteristics and issues in application. Raised a new topological FCL design method, and the example was calculated. Simultaneously, some efforts have been done with the improvement and optimization about the proposed new topology FCL. In this paper, simulation models were constructed by ATP-EMTP, and meanwhile, the electro-magnetic transient simulation of the new topology fault current limiter was carried out. Simulation results show that the new short-circuit current limiter has a good limiting ability, and it can limit the fault current to desired level. A single-phase 220V class model machine of the fault current limiter has been manufactured, and the actual limiting effort and the principle of the DC control circuit of the fault current limiter were studied, verified the feasibility of the principle of the new FCL and the correctness of the design method.

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CLC: > Industrial Technology > Electrotechnical > Transformers, converters and reactors > Reactor > Current limiting reactors
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