Short-Circuit Phasor Models of Inverter-Based Resources for Fault Studies Model: Validation Case Studies

Date

2018-12-01

Author

Haddadi, Aboutalep
Kocar, Ilhan
Kauffmann, Thomas
Gras, Henry
Mahseredjian, Jean
Karaağaç, Ulaş
Farantatos, Evangelos

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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This report presents validation cases studies of generic Electromagnetic Transient (EMT)-type wind turbine generator (WTG) models and their equivalent phasor models for short-circuit studies using field and simulation-based synthetic measurements. A challenge faced by protection and planning engineers is the development and validation of accurate WTG models to study the impact of increased wind integration on system protection. The reason is that short-circuit models of conventional generators are not adequately representative of the substantially-different, and in some cases complex, fault response of renewables. Generic EMT-type models of aggregated WTGs or wind parks with Type-III (Doubly-fed Induction Generator) and Type-IV (Full-size Converter) wind turbines, suitable for transient studies, were presented in previous reports. Taking these detailed models as reference, phasor domain models were developed, and an iterative algorithm to integrate these models into protection tools based on steady-state solvers was proposed. The phasor models reproduce very closely the steady-state short circuit behavior of detailed time domain models. This report is on the validation of generic models and also their corresponding phasor models using actual fault records or simulation results based on detailed manufacturer-specific EMT models.A distinctive characteristic of a WTG is its substantially different negative-sequence fault current contribution, which may adversely impact negative-sequence-based protection. This report, for the Type-III WTG, shows that the negative sequence behavior can be adequately reproduced by the generic model, and hence, the generic model may be used in fault studies involving negative sequence-based protection.The validation includes both Type-III and Type-IV WTG models. The Type-III model has been validated using two sets of actual relay recordings for the fault response of two wind parks consisting of Type-III WTGs and connected to 115 kV and 230 kV transmission systems. The objective is to show qualitatively that the generic model can reproduce the actual fault response in simulations. The Type-IV model has been validated using a set of manufacturer test data.

URI

https://www.epri.com/research/products/000000003002013634
https://hdl.handle.net/11511/117761

Collections

Department of Electrical and Electronics Engineering, Article