Consideration of Low-Carbon Dispatching of Electrothermal Systems for Ultra-Supercritical Power Plants with Carbon Capture

This paper proposes a low-carbon scheduling method for the electric heating system of a carbon capture ultra supercritical power plant that considers comprehensive and flexible operation, in response to the carbon emissions and difficulties in new energy consumption caused by the “electric thermal coupling” of traditional cogeneration units during operation. First, adding carbon capture equipment to the ultra-supercritical unit allows the system to capture and store CO2 generated by coal burning in the boiler, while using electric boilers and heat storage devices to provide auxiliary heat. Secondly, using ultra-supercritical The high flexibility of the unit forms a power plant equipped with carbon capture technology operates with a broad and adaptable approach. and then coordinates with the wind power, so that it can complement the electric energy generated by the wind farm, complete the consumption of wind power, and ensure the low-carbon operation of the integrated energy system. Finally, through case simulation, the effectiveness of the proposed model in low-carbon emission reduction and wind power consumption was verified.

I. Introduction

In recent years, As the new wave of scientific and technological revolution and industrial transformation intensifies, the power system is progressively stepping into an era characterized by security, efficiency, green and lowcarbon transformation, and digital and intelligent technological innovation. In terms of new energy, the output of energy types such as wind power exhibits randomness and volatility characteristics. Therefore, currently new energy units cannot completely replace the guarantee and support role of traditional units in the power system. In terms of thermal power generation, winter heating mainly relies on combined heat and power (CHP) units. However, this “heat-based electricity” model has two major problems. First, it reduces the peak shaving capability of the system and aggravates the phenomenon of wind and light abandonment in the power system [1]–[3]. Secondly, this approach also results in a large amount of carbon emissions, which is contrary to the green and low-carbon concept. Therefore, it is particularly important to fully utilize new energy in the power system and reduce carbon emissions.