When two different static frequency converters are disposed in parallel, they can be synchronized in order to duplicate the power supply to the system
In the shore power business, it is common to encounter configurations where different static frequency converters are disposed, each engaged to a different terminal or connection.
There are occasions where end customers would like to combine two or more frequency converters in order to achieve higher power ratings, so they have to work in parallel in order to obtain this higher power ratings.
This software feature is integrated in our INGEGRID™ converters, acting in the following modes:
Grid Side
There is no problem in the parallelization of the rectifiers, which are disposed in active front-end configuration
Ship Side
The converter works as a generator, this is, it is a voltage source that emulates the behavior of a synchronous generator. Here is where at Ingeteam we have developed specific algorithms that allows us to:
- Synchronize with other generator and share loads
- Synchronize with various additional INGEGRID™ converters in parallel, and ultimately, with other generators as well
This synchronization happens through voltage and frequency droop, without no superior control of any master device indicating the set-points for any of the converters. Additionally, our converters include voltage measurements to ensure a on-load synchronization with the grid.