Novel Highly Flexible Modular Power Electronics for Energy Storage and Conversion Systems by Nima Tashakor

Author:Nima Tashakor
Language: eng
Format: epub
ISBN: 9783031368431
Publisher: Springer Nature Switzerland

4.3.4 Optimum Switching Loss for Topologies with Parallel Mode

This section develops a simple yet effective scheduling algorithm for MMSs with parallel connectivity. The presented algorithm is most effective for topologies with parallel connectivity, which offers a simple and general way to select a suitable arrangement of modules in the arm for each voltage step. Thus, this algorithm is suitable not only for NLM techniques but also for any other switching schemes that directly control , including selective harmonic elimination [31]. Nevertheless, the scheduling approach is evaluated using NLM since low-frequency switching techniques are the preferred choice for high-voltage applications.

The proposed scheduling algorithm determines the appropriate connections to modify after receiving . When designing the algorithm, the main priorities are to minimize switching and conduction losses, enhance voltage balance, and reduce balancing current. Additionally, it should be extendable to a greater number of modules to allow the algorithm to be used in larger systems. In order to make the developed algorithm useful for topologies with and without parallel connection, here, the interconnection between two modules is controlled rather than the state of individual modules.

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