Wind power collection flexible direct current sending-out end participation power grid frequency modulation control method and system

Abstract

The invention discloses a wind power collection flexible direct current sending-out end participation power grid frequency modulation control method and device. A wind power plant and a flexible direct current sending-out end are equivalent to a flexible direct current virtual unit; the power grid frequency modulation control model inputs two types of data to a provincial power grid master stationin real time through a flexible direct-current virtual unit, and the provincial power grid master station outputs three control modes to the virtual unit; the provincial power grid master station outputs different control modes according to different input data and power grid regulation and control requirements; and when the control mode of the flexible direct-current virtual unit is set to be aprimary frequency modulation mode, when the control mode of the flexible direct-current virtual unit is set to be a secondary frequency modulation mode, and when the control mode of the flexible direct-current virtual unit is set to be a local mode, the provincial power grid master station issues different power control instructions to the flexible direct-current virtual unit. The new energy sending-out end integrally participates in primary and secondary frequency modulation control of the power grid, power grid frequency adjustment resources are expanded, and the frequency control quality ofthe power grid is improved.

Description

technical field [0001] The invention relates to a method and device for controlling the frequency modulation of a power grid by a flexible direct current output terminal of a wind power collection, and belongs to the technical field of power system frequency control. Background technique [0002] Flexible DC (VSC-HVDC) is a high-voltage DC power transmission based on fully controlled devices. The most essential difference between flexible DC and conventional DC is that its core components use fully controlled power electronic devices IGBT. With the continuous adjustment and improvement of the energy strategic structure, flexible direct current transmission has gradually become an important technical means to solve new energy grid integration. Now flexible direct current is mostly used in the connection of new energy sources such as wind and wind, the power supply of isolated islands and drilling platforms, and the connection of large power grids. Applications in fields such ...

AI Technical Summary

Problems solved by technology

[0007] The control strategies mentioned in the above-mentioned prior art are all voltage control strategies for station-level converter stations aimed at the connection of specific new energy sources to the flexible DC grid. At present, there is no research on the use of flexible DC new energy collection terminals for fast and accurate control. Participate in the frequency control of the power grid, and realize the overall participation of the new energy sending end in the primary and secondary frequency regulation control of the power grid

Images