Transient Stability Improvement for Combined Heat and Power System Using Load SheddingReport as inadecuate

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Mathematical Problems in Engineering - Volume 2014 2014, Article ID 131062, 8 pages -

Research Article

Department of Electrical Engineering, National Chin-Yi University of Technology, No. 57, Section 2, Chung-Shan Road, Taiping District, Taichung 411, Taiwan

School of Electrical and Control Engineering, Xi’an University of Science and Technology, No. 58, Yen-Ta Road, Xi’an 710054, China

Received 23 January 2014; Accepted 22 March 2014; Published 24 April 2014

Academic Editor: Her-Terng Yau

Copyright © 2014 Hung-Cheng Chen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The purpose of the paper is to analyze and improve the transient stability of an industrial combined heat and power CHP system in a high-tech science park in Taiwan. The CHP system installed two 161 kV-161 kV high-impendence transformers to connect with Taipower System TPS for both decreasing the short-circuit fault current and increasing the fault critical clearing time. The transient stabilities of three types of operation modes in CHP units, 3G1S, 2G1S, and 1G1S, are analyzed. Under the 3G1S operation mode, the system frequency is immediately restored to 60 Hz after tie line tripping with the TPS. Under the 1G1S and 2G1S operation modes, the system frequencies will continuously decrease and eventually become unstable. A novel transient stability improvement approach using load shedding technique based on the change in frequency is proposed to improve the transient stability.

Author: Hung-Cheng Chen, Long-Yi Chang, and Li-Qun Shang



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