A gateway metering system for offshore wind farm dc grid connection

By introducing components such as DC voltage dividers, merging units, and zero-flux current transformers into the DC grid-connected system of offshore wind farms, the problem of insufficient DC metering accuracy has been solved, and high-precision power generation billing and settlement has been achieved.

CN122246888APending Publication Date: 2026-06-19POWERCHINA HUADONG ENG CORP LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
POWERCHINA HUADONG ENG CORP LTD
Filing Date
2026-04-01
Publication Date
2026-06-19

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Abstract

This invention provides a metering system for DC grid-connected offshore wind farms, used for billing and settlement of power generation between the offshore wind farm owner and the power grid. It consists of a DC voltage divider, a merging unit, a zero-flux current transformer, and main and auxiliary DC energy meters. This invention offers significant improvements over conventional metering methods in terms of system principle and installation wiring, and this metering scheme can serve as a typical design for future DC grid-connected metering of offshore wind farms.
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