Bridge-Type Fault Current Limiter Is Used For Fault Ride Through In Fixed-Speed Wind Turbine
Ishraque Ahmad, Prabodh Khampariya
Index Terms: Modeling and simulation of power systems, Fault Current Limiter, Fixed speed wind Turbine, control system.
Abstract: Fault ride-through (FRT) is necessary for large wind farm in most power systems. Fixed speed wind turbines (FSWTs) are a fading but important sector in the fast-growing wind turbine (WT) promote. State-of-art technique applied to assemble grid needs for FSWT wind farm is blade pitching and dynamic reactive power compensation (RPC). Blade pitching is controlled by the difficult mechanical loads forced on a wind turbine during quick power re-establishment. Dynamic RPC is forced by its high capital cost. These present technologies can therefore be limiting, particularly when linking to smaller power systems. A new choice equipment is projected that insert series resistance into the generation circuit. The series dynamic braking resistor (SDBR) dissipates active power and boost generator voltage, potentially displacing the need for pitch control and dynamic RPC. In this project we use a delegate wind farm model to study the useful effect of SDBR. The relations between wind turbines and grid results in rising short-circuit level and fault ride-through (FRT) capacity problem throughout fault situation. In this paper, the bridge type fault current limiter (FCL) with discharge resistor is used for solve these trouble. For this FCL, a control system is planned, which use the dc reactor current as control changeable, to change the terminal voltage of induction generator (IG) without measure any parameter of scheme. In this paper, the wind energy conversion system (WECS) is a fixed-speed system able to with a squirrel-cage IG. The drive train is representing by a two-mass model. The analytical and simulation studies of the bridge-type FCL and proposed control system for restraining the fault current and recovering FRT ability are offered and compare with the force of the request of the series dynamic braking resistor (SDBR).
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