User-level comprehensive energy system optimization scheduling method based on multiple time scales

Abstract

The invention discloses a user-level comprehensive energy system optimization scheduling method based on multiple time scales, and the method comprises the steps: building an objective function and aconstraint condition of the day-ahead and day-inside two-stage optimization scheduling of a comprehensive energy system, and providing a controllable unit start-stop plan and output for ensuring the economic and environment-friendly operation of the system in the day-ahead stage; in intra-day stage, achieving hierarchical control according to dynamic characteristics and time constant differences of cold and hot energy and electric energy, wherein the upper layer stabilizes the cold and hot energy power fluctuation with long scheduling duration, and the lower layer stabilizes electric energy power fluctuation with short scheduling time; and correcting the unit output through unit regulation and control penalty cost guidance and adjustment range constraint rolling. Economic and environment-friendly operation of the system can be achieved, prediction deviation of cold and hot energy loads, electric energy loads and renewable energy sources can be compensated in a layering mode along withreduction of the time scale, and safe, stable, efficient and economical operation of the comprehensive energy system is guaranteed.

Description

[0001] Field [0002] The invention belongs to the field of comprehensive energy systems, and in particular relates to a user-level comprehensive energy system optimization scheduling method based on multiple time scales. Background technique [0003] Energy is the foundation of human survival and development. The traditional energy system construction tends to plan, design and operate independently for each subsystem. There are differences and barriers in the development of different energy supply systems, and the coupling degree of multi-energy systems such as electricity, heat and gas is different. High, the lack of multi-energy complementarity and coordinated control mechanisms among them may lead to problems such as low energy utilization efficiency, insufficient system operation safety, and lack of system self-healing ability under failure conditions. [0004] In recent years, energy technologies such as distributed power generation, renewable energy, cogeneration, micro...

AI Technical Summary

Problems solved by technology

However, further attention needs to be paid to the fact that the response characteristics of electricity, heat, and gas multi-energy are different on the time scale, so it is often not considered or cannot be integrated and To overcome the difference in the time scale of the corresponding characteristics of electric heat and gas, the integrated energy system scheduling cannot play its role to the greatest extent, the error is large, and the work efficiency is low. The difference in the time scale of different response characteristics becomes very important

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