"Development and Analysis of Applicability of a Hybrid Transient Simulation Platform Combining TSA and EMT Elements"

Yi Zhang (Visiting Scholar)
Supervisor: Dr. Aniruddha Gole

Aim of Project

1. Develop a transient simulation platform by interfacing an individual TSA program to PSCAD/EMTDC.
2. Develop a frequency dependent network equivalent (FDNE) to represent the high frequency response of the external network.
3. Carry out a sensitivity analysis to research on the applicability of the fixed FDNE.
4. Investigate the ability to simulate phenomena in the internal system resulting from the external system disturbances.

Description of Project

This project considers the use of hybrid simulation, combining electromagnetic transients (EMT) simulation and transient stability (TSA) simulation to model large networks. By comparing with a full detailed EMT simulation, the results of the project show that the hybrid approach gives more accurate results than TSA simulation alone when power electronic equipment is included in the EMT part of the model. The project also considers line switching and faults in the TSA part of the model which were ignored in earlier approaches, and shows that the accuracy is a function of the electrical distance of the fault to the interface bus bars. A new method to improve this accuracy with the use of switchable frequency dependent network equivalents (FDNE) is also introduced.

Accepted/Published Papers

1. Yi Zhang, Aniruddha M. Gole, Wenchuan Wu, and Boming Zhang, "Development and Analysis of Applicability of a Hybrid Transient Simulation Platform Combining TSA and EMT Elements," IEEE Transaction on Power Systems, submitted for review. FULL TEXT

2. Yi Zhang, Wenchuan Wu, Boming Zhang, and Aniruddha M. Gole, "Frequency Dependent Network Equivalent for Electromagnetic and Electromechanical Hybrid Simulation," Procedings of the CSEE, accepted for publication.

3. Yi Zhang, Wenchuan Wu, Boming Zhang, and Aniruddha M. Gole, "Frequency Dependent Network Equivalent Based Electromagnetic and Electromechanical Decoupled Hybrid Simulation," Procedings of the CSEE, submitted for review.

4. Yi Zhang, Wenchuan Wu, Boming Zhang, and Aniruddha M. Gole, "Inclusion of Faults on Electromechanical Side in Electromagnetic and Electromechanical Hybrid Simulation," Procedings of the CSEE, submitted for review.

5. Yi Zhang, WenchuanWu, Boming Zhang, and Aniruddha M. Gole, "Study on Accuracy, Efficiency and Stability of Electromagnetic and Electromechanical Hybrid Simulation," Automation of Electric Power Systems, submitted for review.

6. Yi Zhang, Wenchuan Wu, Boming Zhang, and Aniruddha M. Gole, "A Decoupled Interface Method for Electromagnetic and Electromechanical Simulation," 2011 IEEE International Conference on Transmission and Distribution, Winnipeg, accepted for publication. FULL TEXT