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Study on the impact of fault current injection in a wind power plant using EMT-type tool

The provision of fast fault current injection (FFCI) is of great importance for power system protection and stability [1]. In August 2020 the French grid code [3] was updated to add such new requirement. However, the impact on the transmission network and interaction between the commissioned generators (not submitted to the new regulation) and new ones could be of concern, particularly when this configuration could take place within the same power park generating facility. To address this topic, RTE (French TSO) is conducting several dynamic studies using manufacturer's black-boxed models in Electromagnetic transient (EMT) type tool to ensure high accuracy and reliable results. ENERCON and RTE have decided to collaborate on this subject, to share their knowledge and to perform onsite tests of this new feature in an existing wind park, which is planned to be upgraded by activating FFCI function inside the wind turbines. The first step of the collaboration, which is addressed within this paper, is the conducted EMTP-RV studies on the wind park. After validating the black-boxed ENERCON model, several dynamic simulations, including fault at the Point of Connection (PoC) and inside the wind park, were conducted to investigate the impact of the implementation of the FFCI in the wind park. The outcome of this study provides support for the implementation in the field of the reactive current injection on some generators of the chosen park and its monitoring.