Download Jordi Vila / Zichao Ye

ECE – 590 I
POWER & ENERGY SYSTEMS SEMINAR
Monday, March 7, 2016, 4:00 – 5:00 p.m., Room 2017, ECEB
Market-based Solutions for Acquisition of Operational Ramping
Requirements in Power Systems
Jordi Vilá
Department of Electrical and Computer Engineering
University of Illinois at Urbana-Champaign
Abstract
Deeper penetrations of renewable resources increase the operational ramping requirements in power
systems. Additionally, harsh weather events reduce the ramping supply provided by conventional controllable
generation resources during specified periods of time. These two trends entail an increased frequency of
scarcity price events in electricity markets for ramping products. This presentation discusses the concept of
operational ramping flexibility and the design of markets to allow the trading of ramping products. Special
attention is given to the assessment of how shortages in ramping products impact prices and system
performance.
IC Compatible Power Supply Circuitry for Gate Driver of Flying
Capacitor Multi-level Converters
Zichao Ye
Department of Electrical and Computer Engineering
University of Illinois at Urbana-Champaign
Abstract
This presentation discusses a new COMS technology compatible circuitry to provide power for the gate drivers
of flying capacitor multi-level converters (FCMC). FCMCs with new GaN power switches have received
increased attention due to their potential to achieve high conversion efficiency and high power density.
However, one of the major challenges is providing power to the gate driving circuitry, as the terminals do not
have constant references. The existing method utilizes an isolated DC/DC converter, which is bulky and energy
inefficient. We introduce two new techniques, cascaded bootstrap and hybrid charge pump, to deliver the
required gate voltage using internally available voltage nodes. We discuss the operation of the proposed circuit
and do side-to-side comparison with exiting solutions. A prototype has been built to show the functionality
and simplicity of the circuit, and demonstrates the compatibility with integrated circuit implementation.