Real-time Modeling of Virtual Synchronous Generator Type VSC Converters for Power Supply to Offshore Platforms
The voltage source converter VSC mimicking the behavior of a synchronous machine provides many advantages for grid operation. This “virtual synchronous generator (VSG)” will be implemented as a real-time simulator model on the RTDS simulator and used to investigate several operating scenarios.
The VS G behaves like a synchronous machine, which is one of the most widely used components of the legacy power system, and so it is well understood. The VSG can provide inertia and damping to the network. Particularly when the ac system is weak, frequency oscillations can be minimized with this approach. Also the VSG is versatile- it can function in the grid-connected mode and also islanding mode without a controller structure change. The VSG can also achieve power sharing between different VSC without communication link.
Several operating scenarios will be simulated. First, one single VSC is connect to the grid. And then the simulated system will expand to two or more VSCs to investigate their parallel operation. Both normal steady state operation and abnormal fault conditions will be tested. Besides, the VSC with VSG controller will be investigated as a synchronous compensator to provide reactive power support to the LCC-HVDC station...