University of Hawaii

Department of Electrical Engineering

Population-based Intelligent Search in Reliability Evaluation of Hybrid Generation Systems with Wind Power Penetration

Date: 2008-05-13
Time: 10:30-11:30
Location: Holmes 389
Speaker: Dr. Lingfeng Wang, Texas A & M University



Reliability evaluation of power-generation systems provides a mechanism to ensure proper system operations in the face of equipment failures. The integration of time-dependent sources such as wind turbine generators (WTGs) makes the reliability evaluation process more challenging. Due to the large number of system states involved in system operations, it is normally not feasible to enumerate all possible failure states to calculate the reliability indices. Monte Carlo simulation (MCS) can be used for reliability evaluation through iterative selection and evaluation of system states. However, the simulation may be time-consuming and take a long time to converge in some evaluation scenarios. In this study, as an alternative option, the method of Population-based Intelligent Search (PIS) is proposed and several representative PIS algorithms are adopted to search for meaningful system states through their inherent convergence mechanisms. These most probable failure states contribute most significantly to the adequacy indices including loss of load expectation (LOLE), loss of load frequency (LOLF), and expected energy not supplied (EENS). The proposed method is also compared with the Monte Carlo simulation via conceptual analyses and numerical simulations. A modified IEEE Reliability Test System (IEEE-RTS) is used in this investigation.  


Lingfeng Wang is currently a Ph.D candidate in the Electrical and Computer Engineering Department at the Texas A&M University, College Station, TX. He received the B.Eng. degree in Instrumentation and Measurement from Zhejiang University, China in 1997, the M.Eng. degree in Instrumentation Science and Engineering from the same university in 2000, and the M.Eng. degree in Electrical and Computer Engineering from the National University of Singapore, Singapore, in 2002. He is the recipient of several research awards including the Walter J. Karplus Summer Research Grant from IEEE Computational Intelligence Society. His major research interests include sustainable electric power and energy systems, computational intelligence, and industrial informatics.