Limitation method of the current and regeneration power reference using the grid-side converter capacity connected with utility grid

摘要

present invention is grid-connected power conversion device of the current limit threshold and developing baseline method relates to a three-phase unbalanced voltage and instantaneous power failure in the region without stopping the renewable energy system, and to support the reactive power of a grid-connected current-limit threshold and developing baseline method of power conversion equipment. That is, the present invention after the reversed-phase component and the top component one classified as a current and voltage information of the system (grid), the top component is used to control the active power and reactive power as usual, reversed-phase components are used as an additional control purposes to have a negative sequence current controller further allows, by applying the maximum current, and in consideration of the effective power renewable energy source (generator) and the interlocking control of the electric power conversion system, DC- link voltage, and more stably control the active power you can, and intended to provide a three-phase unbalanced voltage and instantaneous power failure period in renewable energy systems, and to support the reactive power without stopping criterion and the development of grid-connected current limit threshold method of power conversion devices accordingly. ;