EV Charging Station for Parking Garage

2021 ELE Engineering Design Project (DX03)

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Faculty Lab Coordinator

David Xu

Topic Category

Power

Preamble

With increasing numbers of EV in the market, charging these EVs becomes a problem especially in the large parking garage with limited power capacity. A dynamic charging system becomes necessary to coordinate the power flow in the garage. The system should be able to determine the priority of the EV charging based on the power capacity as well as the market competition. Since the EV on-board charger is not controllable, the project requires to build a small controllable EV charger via the DC charging port.

Objective

The objective of the project is to build a smart power distribution for the EV charging in garage. The power distribution can be controlled by local controller with proper algorithm.

Partial Specifications

Assume that the charging of the EV is controlled via a small AC/DC converter. The power output can be adjusted by the converter.
The specification of the project includes:
1) Design a small 22.5kW AC/DC converter to interface with the car.
2) A smart distribution include a power measurement system and communication.
3) The power distribution panel can communicate with the local controller to send the data and receive the command
4) The local controller determine the priority of charging.

Suggested Approach

The steps are suggested as following:
1) Build a AC/DC converter to interface with car DC charging port. The EV battery requires constant voltage/current charging.
2) Build a central controller to control the garage with 20 (or more) charging ports.
3) Build a model of power distribution panel. The capacity limiting information should be sent to the central controller.
4) Develop an algorithm to distribute the power to the charging station dynamically.

Group Responsibilities

The group should be responsible for the project management, demo and project report.

Student A Responsibilities

Student A design the 22.5kW AC/DC converter (AC-DC part) and test the PWM algorithm

Student B Responsibilities

Student B design the 22.5kW AC/DC converter (DC-DC part) and test the PWM algorithm with student A.

Student C Responsibilities

Student C design the controller for the converter by student A and B

Student D Responsibilities

Student D design the local controller and power distribution panel. The power distribution algorithm is included for the charging station.

Course Co-requisites

ELE754

To ALL EDP Students

Due to COVID-19 pandemic, in the event University is not open for in-class/in-lab activities during the Winter term, your EDP topic specifications, requirements, implementations, and assessment methods will be adjusted by your FLCs at their discretion.