Patent Application for Wind Turbine Load Mitigation System

ChangeBridge: Patent Apps - Power Supply (H02J)

Published September 19th, 2025

Detected March 26th, 2026

Summary

The USPTO has published a new patent application (US20260088626A1) detailing a method and system for drivetrain load mitigation in grid-forming doubly-fed induction generator-based wind turbine generators. The application was filed on September 19, 2025.

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What changed

This document is a publication of a patent application filed with the USPTO, specifically application number US20260088626A1. The application describes a method for mitigating drivetrain loads in wind turbine generators (WTGs) that utilize grid-forming (GFM) doubly-fed induction generators (DFIGs). The proposed system involves acquiring active power, calculating differences from a reference value, and using this information to adjust the generator output voltage phase via rotor excitation current control, based on phase angle feedforward.

As this is a patent application, it does not impose immediate regulatory obligations or compliance deadlines on regulated entities. However, it represents a novel technological development in the renewable energy sector, particularly for wind power generation. Companies involved in the design, manufacturing, or operation of wind turbines, especially those using DFIG technology, may find this patent application relevant for understanding potential future technological advancements and intellectual property landscapes in the field.

Source document (simplified)

← USPTO Patent Applications

METHOD AND SYSTEM FOR DRIVETRAIN LOAD MITIGATION OF GRID-FORMING DOUBLY-FED INDUCTION GENERATOR-BASED WIND TURBINE GENERATORS BASED ON PHASE ANGLE FEEDFORWARD

Application US20260088626A1 Kind: A1 Mar 26, 2026

Inventors

Lei DING, Zhihao WANG, Xiaotian YANG, You YING

Abstract

A method for drivetrain load mitigation of grid-forming (GFM) doubly-fed induction generator (DFIG)-based wind turbine generator (WTG) based on phase angle feedforward, wherein: acquiring active power of a GFM DFIG-based WTG; calculating difference value between acquired active power of GFM DFIG-based WTG and active power reference value; inputting difference value into GFM control to obtain output signal; adding output signal and reference frequency value of virtual synchronous coordinate system to obtain frequency of virtual synchronous coordinate system; integrating the frequency to obtain output value; multiplying additional damping active power reference value of GFM DFIG-based WTG by control gain of phase angle feedforward control to obtain product result; adding product result and output value to obtain angle of virtual synchronous coordinate system, and based on the angle, obtaining control quantity for generator output voltage phase; based on control quantity, adjusting phase of actual output voltage of GFM DFIG-based WTG by controlling rotor excitation current.