Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

On the Low Risk of SSR in Type III Wind Turbines Operating with Grid-Forming Control

Journal Article · · IEEE Transactions on Sustainable Energy
We have shown in previous work that the risk of subsynchronous resonance between wind power plants with Type III wind turbines and series-compensated transmission lines is low when the wind turbines are operated in grid-forming (GFM) mode instead of the standard grid-following mode. This paper explains the fundamental mechanism behind the improved damping characteristics by modeling the positive- and negative-sequence impedances of Type III wind turbines in GFM control mode. Here it is discovered that the GFM control naturally acts against the negative resistance behavior of Type III wind turbines at subsynchronous frequencies that results from an interaction between the rotor-side converter current controller and negative slip. The developed impedance models in the sequence domain and the improved damping behavior are verified using PSCAD simulations of a 2.5-MW Type III GFM wind turbine. The modeling predictions are also supported by experimentally measuring the impedance response of a 2.5-MW Type III wind turbine in GFM mode.
Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Wind Energy Technologies Office
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1996232
Report Number(s):
NREL/JA-5D00-84073; MainId:84846; UUID:63a3c4b9-5b04-47dc-b8c2-ef7b7dc5208b; MainAdminID:70257
Journal Information:
IEEE Transactions on Sustainable Energy, Journal Name: IEEE Transactions on Sustainable Energy Journal Issue: 1 Vol. 15; ISSN 1949-3029
Publisher:
IEEECopyright Statement
Country of Publication:
United States
Language:
English

References (23)

Doubly Fed Induction Machine: Modeling and Control for Wind Energy Generation book September 2011
Subsynchronous resonance and its mitigation for power system with unified power flow controller journal May 2017
Grid-Forming Inverters-Real-Life Implementation Experience and Lessons Learned conference January 2021
Photovoltaic Synchronous Generator: Architecture and Control Strategy for a Grid-Forming PV Energy System journal June 2020
Oscillator-Based Inverter Control for Islanded Three-Phase Microgrids journal January 2014
Grid-Forming Wind: Getting ready for prime time, with or without inverters journal March 2022
Impedance-Based Prediction of SSR-Generated Harmonics in Doubly-Fed Induction Generators conference August 2019
Sequence Impedance Modeling of Grid-Forming Inverters conference July 2021
Subsynchronous Oscillation Events in an MTDC-connected Renewable Energy System conference December 2021
Nyquist-Stability-Criterion-Based SSR Explanation for Type-3 Wind Generators journal September 2012
Impedance-Model-Based SSR Analysis for Type 3 Wind Generator and Series-Compensated Network journal December 2012
Characteristic Analysis of Subsynchronous Resonance in Practical Wind Farms Connected to Series-Compensated Transmissions journal September 2017
Impedance Modeling of Three-Phase Voltage Source Converters in DQ, Sequence, and Phasor Domains journal September 2017
Implementations and Evaluations of Wind Turbine Inertial Controls With FAST and Digital Real-Time Simulations journal December 2018
Impedance Modeling and Stability Analysis of VSG Controlled Type-IV Wind Turbine System journal December 2021
Sequence Impedance Measurement of Utility-Scale Wind Turbines and Inverters – Reference Frame, Frequency Coupling, and MIMO/SISO Forms journal March 2022
Control of Power Converters in AC Microgrids journal November 2012
Impedance Modeling and Analysis of Grid-Connected Voltage-Source Converters journal March 2014
Comparison of Dynamic Characteristics Between Virtual Synchronous Generator and Droop Control in Inverter-Based Distributed Generators journal May 2016
Sub-Synchronous Interaction Damping Control for DFIG Wind Turbines journal January 2015
Real-World Subsynchronous Oscillation Events in Power Grids With High Penetrations of Inverter-Based Resources journal January 2023
SSR Damping Controller Design and Optimal Placement in Rotor-Side and Grid-Side Converters of Series-Compensated DFIG-Based Wind Farm journal April 2015
Grid-Forming Control for Solar PV Systems With Power Reserves journal October 2021