Wind converter control for weak grid

US9970417B2 · kind B2 · utility

Assignee

• General Electric Company · US

Inventors

• Zhihui Yuan · Garching bei München, DE
• Robert Roesner · Oberschleißheim, DE
• Stefan Schroeder · Garching bei München, DE
• Ara Panosyan · Munich, DE
• Krishna Kumar Anaparthi · Munich, DE

Key dates

• Filing date: Apr 14, 2016
• Grant date: May 15, 2018
• Expiry date: Apr 28, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/76
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

This disclosure relates to systems and methods for controlling a wind converter for a weak electrical grid. In one embodiment of the disclosure, a system for controlling the wind converter includes a wind converter connected to an electrical grid at a point of connection (POC) and operable to transfer a power to the electrical grid. The system includes a first control loop operable to calculate, based on electrical grid parameters and wind converter characteristics, a voltage reference to be generated by the wind converter. The system includes a second control loop to convert, based on the electrical grid parameters, the voltage reference into a current reference. The second loop converts the angle information of the voltage reference into a voltage at the POC. The system includes a third control to regulate, based at least on the current reference, the power transferred by the wind converter to the electrical grid.