Planning of Flexible Generators and Energy Storages under High Penetration of Renewable Power in Taiwan Power System

Yuan-Kang Wu, Wen-Shan Tan, Yu-Shuang Chiang and Cheng-Liang Huang
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Yuan-Kang Wu: Department of Electrical Engineering, National Chung Cheng University, Chia-Yi 62102, Taiwan
Wen-Shan Tan: School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Subang Jaya 47500, Malaysia
Yu-Shuang Chiang: Department of Electrical Engineering, National Chung Cheng University, Chia-Yi 62102, Taiwan
Cheng-Liang Huang: Department of Electrical Engineering, National Chung Cheng University, Chia-Yi 62102, Taiwan

Energies, 2022, vol. 15, issue 14, 1-19

Abstract: The proportion of renewable power generation in the world has been increasing in recent years. However, the fluctuations and uncertainties of renewable power generation bring a considerable challenge to future unit scheduling. Therefore, the generation flexibility in power systems becomes more critical as a large amount of renewable generation is integrated into power systems. The use of flexible generators with energy storage systems is one of the most efficient methods of improving power system flexibility. The primary purpose of this study is to explore the effect of generation flexibility on the cost of unit scheduling. A flexibility index is used to evaluate the generation flexibility in the Taiwan power system, and a multi-scenario analysis for renewable power integration is considered. This study also considers various system constraints, such as the unit commitment of actual hydro and thermal units, the scheduling of flexible internal combustion engines (ICEs) and energy storage systems, and possible curtailments of renewable power generation. According to the seasonable characteristics of renewable power generation, this study provides a suitable capacity for flexible ICE units and energy storage systems. Furthermore, this study demonstrates that the cost of unit scheduling is effectively reduced by increasing flexible ICE units and energy storage systems. The results of this study can be used as a reference for power systems in preparing flexible generating units and energy storage systems under the integration of a large amount of renewable power generation in the future.

Keywords: renewable energy; unit scheduling; generation flexibility; flexibility index; internal combustion engine; energy storage system (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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