Introduction To supply energy for industrial users in an economical and efficient way, an energy supply unit model in distributed energy system (DES) is established based on coupling characteristics of electric and thermal loads, and optimal operation strategy is proposed.
Method Taking an industrial park in Guangzhou as the research object, combined with the actual load data, the optimum parameters were reasonably determined, annual power generation, gas consumption and energy efficiency were calculated, and the impact of load increment was studied.
Result The results show that the start-up thermal load of unit has a great influence on the annual power generation of DES. With the optimized operation strategy, the annual power generation can be increased by 18.7%, and the self-power supply ratio of the park can be increased. The energy efficiency is more than 85%.
Conclusion The optimal operation strategy is correct and effective. It can be applied to the optimization of thermo-electric coupled DES, effectively enhance the energy supply of DES with high energy efficiency.
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