-objective/context:

The increasing share of renewable energy sources (RES) and their inverter-based resources (IBRs) bring, along with net-zero benefits, new challenges regarding interoperability. The necessity of having more IBRs will require multiple players to operate within a context of intellectual property (IP) protection, which cannot impede the need for a system that functions correctly. One potential technique used to assist the detailed studies through electromagnetic transients (EMT) simulations is the conversion of the principal original equipment manufacturers (OEM) into shareable black-box versions through dynamic link libraries (DLL), which will prevent IP violations while preserving simulation accuracy by including the original elements within the DLL. In particular, this work focuses on increasing simulation fidelity by transposing full-switching models of offshore wind turbines (OWTs) and provides valuable recommendations.

-methods:

The chosen approach initially involves translating the model one-to-one into Simulink, enabling the generation of an equivalent C-code version of the overall behavior that can be converted into a PSCAD module via the IEEE Cigre Wrapper. More specifically, it translates PSCAD’s interpolation feature into Simulink modules to create a DLL compatible with PSCAD’s interpolation devices, such as the IGBTs. Finally, potential strategies to enhance the speed of the equivalent DLL were identified, along with consideration of additional aspects, such as simulation setups, that might impact the accuracy of the full-switching equivalent DLL.

-outcomes/conclusion:

The outcomes include the complete full switching DLL of the OWT, along with the relevant guidelines for performing the conversion and validating a component whose inaccuracies can easily lead to misalignments in the IGBTs, thereby impacting overall converter operation. Additionally, a study will be conducted to determine whether the full switching of DLL elements can be compatible with both 50/60Hz systems in order to assess potential impacts on the harmonic models.