Positive-Sequence Modeling of Droop-Controlled Grid-Forming Inverters for Transient Stability Simulation of Transmission Systems

Du, Wei; Nguyen, Quan H.; Wang, Song; Kim, Jinho; Liu, Yuan; Zhu, Songzhe; Tuffner, Francis K.; Huang, Zhenyu

doi:10.1109/tpwrd.2024.3376245

Positive-Sequence Modeling of Droop-Controlled Grid-Forming Inverters for Transient Stability Simulation of Transmission Systems

Journal Article · Mon Mar 18 00:00:00 EDT 2024 · IEEE Transactions on Power Delivery

DOI:https://doi.org/10.1109/tpwrd.2024.3376245· OSTI ID:2477606

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Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Portland General Electric, Portland, OR (United States)
GridBright, Alamo, CA (United States)

Here, this paper describes a positive-sequence model to represent two widely reported droop-controlled grid-forming inverters for bulk power systems simulation study. Methods of how to develop the equivalent voltage source behind impedance to represent inverters with and without inner control loops, modeling of P-f and Q-V droop controls, active and reactive power limiting modeling, and modeling of fault current limiting controls are described in detail. The model is implemented in commercially available positive-sequence simulation tools and compared with detailed electromagnetic transient models in both a single-grid-forming-inverter infinite-bus system and a modified IEEE 39-bus system. Finally, the model is tested on the full US Western Electricity Coordinating Council (WECC) system. Study results show that the model has a good level of accuracy compared to the detailed EMT models, and at the same time also achieves a high computational efficiency, which is suitable for the bulk power system simulation study.

View Accepted Manuscript (DOE)

Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office

Grant/Contract Number:: AC05-76RL01830

OSTI ID:: 2477606

Report Number(s):: PNNL-SA--182201

Journal Information:: IEEE Transactions on Power Delivery, Journal Name: IEEE Transactions on Power Delivery Journal Issue: 3 Vol. 39; ISSN 0885-8977

Publisher:: IEEECopyright Statement

Country of Publication:: United States

Language:: English

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