Abstract
Grid-forming (GFM) control of Type-3 and Type-4 wind turbine generators has attracted substantial attention in power systems research; however, the limited over-current capability of power electronics converters continues to deteriorate the grid strength of the evolving power systems. Synchronous wind, also known as Type-5 wind turbine generator (WTG), offers a unique GFM solution to address grid integration and grid strength issues by keeping the grid largely synchronous at very high penetration levels of renewable generation. A Type-5 WTG interfaces to the electric grid via a synchronous generator (SG) driven by a variable-speed hydraulic torque converter; hence, the wind rotor operates in variable-speed mode for maximum power generation and the generator shaft remains synchronous to the grid. This paper developed and tested a high-fidelity model of Type-5 WTG under power-hardware-in-the-loop (PHIL) testing environment. The PHIL demonstration showed that a Type-5 WTGs inherently behaves as a GFM unit and can obtain similar performance in terms of power responses, wind rotor dynamics, and efficiency compared to Type-3 WTG in high wind conditions. The developed model also provides further insight on how Type-5 WTGs can benefit the smooth transition to power systems with high integration level of inverter-based resources.
Original language | American English |
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Number of pages | 11 |
State | Published - 2024 |
Event | IEEE Energy Conversion Conference and Expo - Phoenix, AZ Duration: 20 Oct 2024 → 24 Oct 2024 |
Conference
Conference | IEEE Energy Conversion Conference and Expo |
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City | Phoenix, AZ |
Period | 20/10/24 → 24/10/24 |
NREL Publication Number
- NREL/CP-5D00-90752
Keywords
- grid strength
- grid-forming control
- power-hardware-in-the-loop
- synchronous wind
- Type-5