Research on power and energy balance of new power system under low carbon emission path

Abstract

Combined with the requirements of low-carbon transformation of power system, this paper points out the existing problems in power and energy balance of new power system under the dual carbon target. The technical solutions for electric power balance are summarized from the perspectives of planning and operation. The concept of “carbon correlation” is proposed to quantitatively represent the matching degree between equipment characteristics and dual carbon paths, which can provide alternative reference for planning. Secondly, considering the uncertainty and uncontrollability of new energy, the operation level is divided into normal state and emergency state, so as to improve the resilience of the power system. Finally, seasonal energy storage planning is taken as an example1 to clarify its role in medium - and long-term power balance, and the results show that although seasonal storage increases the configuration cost of energy storage, it can reduce the operating cost and improve the economy of the system as a whole. The multi-stage low-carbon planning of multi-energy complementary comprehensive energy park is taken as example 2 to clarify the steps of carbon-energy collaborative planning. The results show that the multi-stage planning method can avoid the waste caused by the equipment in the early stage and make the time sequence of capacity expansion and load increase consistent. At the same time, the demand response method can be used to be more flexible and reasonable, and can further improve the economy of the system.

Keywords

• Low-carbon
• Power and energy balance
• Carbon correlation
• Seasonal energy storage
• Multi-stage low-carbon planning