Fault Current Limit (FCL) Technology (Magnetic Valve Controlled Reactor-Type Fault Current Limiter Principle and Simulat
Summarized the FCL practical research which faces to the key technical problems, briefly introduces the study of magnetic valve controllable reactor type fault current limiter principle, and the simulation results validate the superiority of the limiting
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Abstract. Summarized the FCL practical research which faces to the key technical problems, briefly introduces the study of magnetic valve controllable reactor type fault current limiter principle, and the simulation results validate the superiority of the limiting current performance. Keywords: Magnetic valve controlled reactor-type, Simulation, Superior performance-limiting.
1 Introduction The rapid development of power system, the single and power plant, substation capacity, city and industrial center load and the load density is increased, and the power system interconnection, leading to the modern power system at all levels of the grid in the short-circuit current level of increasing [ 1-5]. On how to effectively restrict the short circuit current level, on the safe operation of the power system, has important significance. This paper introduces the magnetic valve controllable reactor fault current limiter principle and simulation results.
2 The Key Technical Issues of the FCL Ideal fault current limiter system should not adversely affect, but in practical application, due to their respective principle defects, FCL can not completely satisfy the technical requirement of current limiter. When short-circuit fault, FCL participation system transient process, and system between the various devices to generate interactive effects. In depth study of FCL and system between the interactive effects of implementation of FCL project is the prerequisite, following induction of FCL engineering applicable must be faced with in the process of key technical problems. 1) short circuit fault induced transient angle oscillation and even instability threaten the safe operation of power grids, and FCL in limiting short circuit current and also involved in the transient process, and the transient behavior of the system is worth studying [6-10]. 2) FCL the dynamic characteristics, the stray capacitance will impact near the high voltage circuit breaker breaking transient recovery voltage characteristics, is not H. Tan (Ed.): Knowledge Discovery and Data Mining, AISC 135, pp. 135–141. springerlink.com © Springer-Verlag Berlin Heidelberg 2012
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conducive to the circuit breaker [11-14]. Meanwhile, FCL and the circuit breaker reclosing can also apply the key to effective co-ordination [12, 16]. 3) FCL string into the line, on line over current protection setting of impact, at the same time as the dynamic characteristic of FCL, this will make the line dynamic impedance characteristics become complicated, affecting distance protection equipment [ 15-17]. 4) As everyone knows, fault current limiter is used in high voltage, large capacity, to highlight its technical economy. At present, FCL research has stuck in the middle, low pressure areas, engineering application is not much, how to design a high voltage, large capacity FCL research. 5) Study of FCL economic evaluation index, quantitative effect of technical factors, build reasonable technological economics evaluation model, the FCL application significance. In technologica
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