Multi-objective optimal dispatch for integrated energy systems based on a device value tag

Abstract

Due to the variety of devices and operating scenarios in an integrated energy system (IES), the optimal dispatch of an IES is usually complicated. An optimal dispatch method for an IES is proposed by defining the scheduling value for each device which can be different under various scenarios. First, thinking over the private and public attributes of each operating equipment, the evaluation system is established with the actual scenarios of economic, environmental and energy-savings being considered. Secondly, the economic, environmental and energy-saving benefits of each operating equipment are quantified by Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS). Therefore, the scheduling value of the device is comprehensively assessed according to the specific scenario. Finally, decomposing the output of the device into direct available energy and indirect available energy, an optimal model is built with the maximum general production benefits as the objective, and is solved by MATLAB and CPLEX. The simulation results show that the evaluation system can reflect multiple values of devices. The proposed model can unify the modeling of optimal dispatch for different scenarios in the IES and can improve dispatch efficiency, while ensuring the accuracy of the results with high computation efficiency.