Abstract
The protection of sensitive loads against voltage drop is a concern for the power system. A fast fault current limiter and circuit breaker can be a solution for rapid voltage recovery of sensitive loads. This paper proposes a compound type of current limiter and circuit breaker (CLCB) which can limit fault current and fast break to adjust voltage sags at the protected buses. In addition, it can act as a circuit breaker to open the faulty line. The proposed CLCB is based on a series L-C resonance, which contains a resonant transformer and a series capacitor bank. Moreover, the CLCB includes two anti-parallel power electronic switches (a diode and an IGBT) connected in series with bus couplers. In order to perform an analysis of CLCB performance, the proposed structure was simulated using MATLAB. In addition, an experimental prototype was built, tested, and the experimental results were reported. Comparisons show that experimental results were in fair agreement with the simulation results and confirm CLCB’s ability to act as a fault current limiter and a circuit breaker.
Highlights
Faults in electrical power systems are inevitable
fault current limiters (FCLs) with low cost and can Expected advantages of the proposed current limiter and circuit breaker (CLCB) over other FCLs are as the following: improve the system protection against fault by fast current limiting and breaking
This device acts by dual-function protection, limiting the fault current and open the faulty line similar to a circuit breaker
Summary
Faults in electrical power systems are inevitable. They can lead to high transients and thermal stresses on power system equipment such as overhead lines, cables, transformers, and switchgears. A power system with unidirectional power flow and application solid-state Analysis circuit breaker, to improve grid voltage duringofthe fault is controller (UPFC)of is discussed. Analysis and control of fault current bypaper firingpresents angle control solid-state fault current limiter is an(CLCB) This a newof type of current limiter circuit breaker withissue serieswhich compensation. On the strategy of power electronic switch control [29] This protection device is invisible during the normal operation mode. FCLs with low cost and can Expected advantages of the proposed CLCB over other FCLs are as the following: improve the system protection against fault by fast current limiting and breaking. Short recovery time and ability to limit the fault current before initiation of the first peak; By connecting proposed to thethe grid, the mechanical breaker can be peak; replaced;. Experimental results are presented and a conclusion is drawn
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