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To improve electrical grids power quality, a dynamic voltage restorer with a magnetic voltage source converter protection scheme integrated in the coupling transformer is developed. Finite element analyses with an electrical-magnetic coupling modeling are performed to study the behavior of the coupling transformer in extreme electrical grid conditions.
Dynamic voltage restorers are devices inserted in transmission and distribution electrical grids to improve efficiently the power quality. The weak point of these series devices is the fault current protection of the voltage source converter (VSC). We propose a new topology of the coupling transformer to protect the VSC, by replacing the usual electromechanical bypass by an embedded magnetic one....
The dynamic voltage restorers are efficient series compensation devices to improve power quality. Indeed, they are composed of a coupling transformer and power electronics to provide fast voltage sag correction and harmonics compensation. This paper focuses on a new topology of a coupling transformer for the dynamic voltage restorers which improves the protection of the voltage source converter against...
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