Analysis and control of a dynamic voltage restorer are described. The voltage restorer is based on a four-leg voltage source converter. The three-phase input variables are resolved into the positive, negative and zero-sequence components using a weighted, recursive, least-squares estimator. Identical controllers have been used for each sequence component. A laboratory model of the restorer has been constructed and its performance has been tested by simulation and experiments.
Inspec keywords: power convertors; recursive estimation; least squares approximations
Other keywords:
Subjects: Other topics in statistics; Other topics in statistics; Power convertors and power supplies to apparatus; Interpolation and function approximation (numerical analysis); Interpolation and function approximation (numerical analysis); Control of electric power systems
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