2019 Graduate Fellows

Yao Long

Rooftop photovoltaic (PV) system installations are growing rapidly worldwide. Distribution systems with high penetration of PV are likely to experience voltage rise problems caused by the reverse power flow from PV, and rapid voltage fluctuations caused by the intermittency and stochasticity of PV generation. Energy storage systems (ESSs), with advantages such as fast response, easy deployment and flexible operation, is appropriate for voltage regulation.

My research during 2018-2019 will focus on the optimization of ESS utilization in radial distribution system voltage control, with the objective of achieving satisfactory voltage level while minimizing cost. The control strategy will be validated using the OPAL-RT real-time digital simulator. I will first test these control strategies on a 34-bus test system and then extend them to larger distribution networks, which will require optimizing the placement of ESS and coordination between ESSs.

Advisor: Daniel Kirschen – Electrical Engineering

“Providing clean energy to the inhabitants of our planet is a major challenge to future generations. The University of Washington is to be congratulated for establishing an Institute where faculty and students can work together to tackle the difficult global challenge of energy sustainability.”
– Mildred Dresselhaus, Professor of Physics and Electrical Engineering, Emerita and Institute Professor, Massachusetts Institute of Technology
“Energy competition is opening up in a variety of ways, the push for carbon control will continue, and the rate of technology advancement is exponential. All the things I’ve seen at the CEI are just perfect for the way we see things going in energy. You guys are at the cutting edge. We’re counting on you.”
– Ronald Litzinger, President, Edison Energy