Operation Mechanism and Peak-load Shaving Effects of Carbon-capture Power Plant

Carbon capture and storage (CCS) technology is a critical option for delivering low carbon power. Carbon capture power plant would present special characteristics, imposing significant impacts on the security and efficiency of power system operation. In this paper, considering the fundamental principle of CCS technology, inner energy flow of carbon-capture power plant was examined, generation output limits were quantified, and performances of carbon-capture plant in power peak-load scheme were revealed. Then, a novel method based on cost curve of power peak load shaving was proposed and a numerical case integrating complex power mix was introduced, for the purpose of analyzing the saved costs in peak shaving, the improved operation margin in system operation and the enhanced penetrations for large-scale renewables, especially wind power, that incurred by connecting carbon-capture plant to power grid at large-scale.