Microcontroller-based Capacitor Discharge Circuit with Configurable Setpoints

The standard solution within the power industry to these issues would be to employ bleeding resistors at the terminals of a capacitor bank to safely discharge the circuit. The resistors can be in a switching topology, or permanently connected, although the latter choice would result in power loss and potential overheating. NextEra Energy, an American energy company specializing in energy utility and efficiency, wanted to pursue a switching resistor-based capacitor discharge tool to safely discharge high voltage capacitor banks that are utilized in conjunction with PVS980 inverters. More specifically, NextEra wanted a tool that could be utilized in a laboratory setting where, after undergoing certain testing, capacitor banks can be brought in and easily discharged. As a result, this senior design project was formed to explore potential solutions and provide NextEra with a design that can safely discharge their capacitor banks while also meeting various constraints and requirements. Due to the dangers of high voltages, however, NextEra has agreed to allow the team to develop a prototype of the system that will only be tested at low voltage and that can then be potentially scaled to higher voltages in the future.

Authors
Zeeshan Asif

Electrical Engineering

Kealan Frost

Electrical Engineering

Javier Lopez-Marrero

Electrical Engineering

Will Serface

Computer Engineering

Advisors
Advisor NamePosition
Dr. Chung Yong ChanSenior Lecturer
Dr. Arthur WeeksAssociate Professor
Dr. Gabriel Vazquez-RamosAcademic Instructor
Review Committee
Reviewer NameDepartmentPosition
Dr. Zakhia AbicharECEAssociate Lecturer
Dr. Piotr KulikECEAssociate Professor
Dr. Qifeng LiECEAssociate Professor
Mark MaddoxECEInstructor
Dr. Wei SunECEAssociate Professor
Final Presentation