University of Twente Student Theses
Integrating Power Electronics Stages and Dynamic Load Balancing in Level 2 EV Charging
Abdo, Omar Mohammed Nabil (2024) Integrating Power Electronics Stages and Dynamic Load Balancing in Level 2 EV Charging.
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| Abstract: | This paper investigates the possibility of designing power electronics and conversion stages and implementing them within residential level 2 Electric Vehicle (EV) chargers. Moreover, it investigates the validity of applying a Dynamic Load Balancing (DLB) mechanism by controlling these power electronics stages, making the EV charger a controllable load. Currently, the main function of residential EV chargers is to directly connect the On-Board Charger (OBC) to the grid, while providing it with safety and communication protocols. However, some EVs face communication issues with some brands of EV chargers due to incompatibility. This causes the charging performance to be limited, as well as restricting the application of DLB. Moreover, existing DLB systems can only control the output power of the level 2 chargers in discrete steps, thus, limiting the controllability of the load of the charger. The proposed power electronics stages consisted of an input LC filter, an interleaved boost PFC converter, a DC-AC inverter, an output filter, and a load impedance that resembles the input stage of the OBC. The proposed DLB system has a fluctuating input voltage from the grid (which fluctuates according to the load), and accordingly adjusts the power output to reduce these fluctuations. This is done using a feed-forward controller that directly controls the power output of the charger. A major advantage introduced is that the power output of the overall system can be continuously and dynamically controlled, bringing benefits for better EV grid integration and support. However, the idealised proposed system portrayed 7% lower efficiency than commercial level 2 chargers and introduced higher costs of manufacturing. The compatibility issues will not be solved with this system since it does not bypass the control pilot. |
| Item Type: | Essay (Bachelor) |
| Faculty: | EEMCS: Electrical Engineering, Mathematics and Computer Science |
| Subject: | 53 electrotechnology |
| Programme: | Electrical Engineering BSc (56953) |
| Link to this item: | https://purl.utwente.nl/essays/101933 |
| Export this item as: | BibTeX EndNote HTML Citation Reference Manager |
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