Optimal Configuration and Performance Analysis of Terminal Multi-energy Complementary System

Abstract

In order to establish a typical terminal multi-energy complementary system and know the characteristics of different optimal configurations and influence factors of its performance under different optimization objectives, this paper proposed a terminal multi-energy complementary system that integrates solar energy, wind energy and natural gas. The energy flow characteristics were analyzed based on the bus-bar structure, and an integrated optimization model for the design and operation of the system was established accordingly. Furthermore, the effects of optimization objectives and energy prices on the optimal configuration and performance of the system were studied, and the applicable scenarios of typical equipment such as micro-gas turbine, internal combustion engine and absorption chiller were illustrated, as well as the promoting effects of flexible power supply and energy storage device on the consumption of photovoltaic and wind power. The relationship between annual CO2 emission reduction ratio and fossil fuel saving ratio of the system is consistent, and that between annual cost saving ratio and CO2 emission reduction ratio is contrary under current technical and economic conditions. The most suitable natural gas price to ensure the applicable downward pressure exists and the effect of peak-valley difference of electricity price on system performance is clarified. The results can provide reference for system integration optimization design and energy price policy formulation.

Keywords

• multi-energy complementary
• bus-bar structure
• optimal configuration
• performance analysis
• energy price analysis