Abstract

SANCHEZ MUNOZ, David; PEREZ GONZALEZ, Ernesto; PINEROS, Juan Fernando  and  AGUDELO ZAPATA, Laura. Simplified Inverter-Based Generation Model for Protection and Short-Term Stability Studies in Electromagnetic Transient Resolution. TecnoL. [online]. 2022, vol.25, n.55, e206.  Epub Feb 02, 2023. ISSN 0123-7799.  https://doi.org/10.22430/22565337.2347.

The new dynamics of inverter-based generation (IBG) and its response to fault events jeopardize power system security. So, for the reliable inclusion of large IBG power plants is necessary to understand the new issues associated with this kind of resource. In this sense, the lack of accurate generic models hinders disturbances analysis. Also, most of the manufacturer's detailed EMT models are black boxes. For that reason, this work proposes a generic IBG model in EMT resolution appropriate for short-circuit, protection, and short-term voltage stability studies. This model considers several functionalities such as grid synchronization under unbalanced voltage dips, flexible positive and negative sequence current injection, peak current limitation, dynamic reactive power control, and Fault Ride Through (FRT). This model allows utilities to face the challenge of performing accurate simulations with large amounts of renewable resources connected to their energy matrices. This model uses a voltage-controlled current source that reproduces the grid side inverter behavior and is implemented in the software ATP/EMTP. The short-circuit response is tested in a simulation scenario with different fault events, presenting reliable behavior; thus, it considers technical and mandatory IBG requirements. Finally, the proposed model has fast initialization and is suitable for large simulation time steps, making it worthy for EMT simulations in large grids.

Keywords : Grid-side converter; short-circuit current; controlled current source; inverter-based distributed generation; inverter EMT modeling.

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