ECE 590 I POWER & ENERGY SYSTEMS SEMINAR
WHEN: Monday, December 2, 2019, 3:00 – 3:50 p.m.
WHERE: Room 4070, ECEB
SPEAKER 1: Mariola Ndrio, Electrical and Computer Engineering, UIUC
TITLE: "A Scalar-Parameterized Mechanism for Two-Sided Markets"
Abstract: We consider a market in which both suppliers and consumers compete for a product via scalar-parameterized supply offers and demand bids. Scalar-parameterized offers/bids are appealing due to their modeling simplicity and desirable mathematical properties with the most prominent being bounded efficiency loss and price markup under strategic interactions. Our model incorporates production capacity constraints and minimum inelastic demand requirements. Under perfect competition, the market mechanism yields allocations that maximize social welfare. When market participants are price-anticipating, we show that there exists a unique Nash equilibrium, and provide an efficient way to compute the resulting market allocation. Moreover, we explicitly characterize the bounds on the welfare loss and prices observed at the Nash equilibrium.
SPEAKER 2: Qichen Jin, Electrical and Computer Engineering, UIUC
TITLE: "Generator Back-Electromotive-Force Shaping for DC Output with Low-Ripple Voltage"
Abstract: There are two major approaches to convert three-phase AC to DC: a passive approach that uses rectifier diodes and capacitors and an active approach that deploys MOSFET/IGBT. Both approaches have associated drawbacks. The extensive use of active switching devices and capacitors impairs the overall reliability of the converter system. For an integrated three-phase generator rectifier system, such as in offshore wind farms or electrical ships, trade-offs can be made between generators and rectifiers in such a way as to make feasible the simplest rectifier bridge implementation. The goal is to find the optimal trapezoida-shaped back-emf such that the output DC ripple loss is minimized while a near-unity power factor of the generator is maintained.