Ramping Capacity Consideration in Reliability
Evaluation of Power Systems with WTGs and Energy Storage
Speaker:
Mr Zhiyong Gao
Date:
23 May 2011 (Monday)
Time:
5.00pm to 6.30pm (Light refreshments will
be served)
Venue:
Seminar Room EA 06-05 (Sixth Floor)
Block EA, Faculty of Engineering
National University of Singapore
5 Engineering Drive 1, Singapore 117608
Map:
http://www.gothere.sg/maps?q=engineering+drive+1&ss=#q:engineering%20drive%201
Abstract
In a power system with
high renewable power penetration, uncertain and intermittent characteristics
of renewable energy sources such as wind and solar irradiation become major
concerns of system planning and operation. In such system,
conventional thermal or hydro units have to be more frequently shut down or
started up to incorporate load and renewable source variation. The slow ramp
up (or down) of conventional units may cause energy shortage (or surplus).
Those problems have not been considered in the reliability evaluation of
conventional power systems due to low renewable power penetration. In this
paper, the ramp rates of conventional generators are considered in
reliability evaluation of power systems with high wind power penetration.
The effect of the ramp up rate of conventional generators
（CGs）
on system reliability is measured by the expected energy not supplied. A new
index designated as the expected energy not used is proposed and formulated
to represent the energy surplus due to sudden increase of wind speed and the
slow ramp down rate of conventional units. The IEEE-RTS is used to
illustrate the applications of the proposed method.
Biography:
Zhiyong Gao obtained his B.E. degree from
Northeastern University, China, in 2002, and the M. Sc. Degree from Nanyang
Technological University, Singapore, in 2007. From 2007 to 2008, he was a
research associate in school of EEE, Nanyang Technological University. He is
currently a PhD student in the Department of Power Engineering, Nanyang
Technological University.