Two-Stage Optimal Economic Scheduling for Commercial Building Multi-Energy System Through Internet of Things

Chunming Liu,Dingjun Wang,Yujun Yin

doi:10.1109/access.2019.2957267

Abstract

In this study, an advanced Internet of Things (IoT) technology is applied to the energy management of an intelligent combined cooling, heating, and power (CCHP) commercial building system. Based on the framework of a smart energy management system (SEMS) using IoT technology, a two-stage optimal scheduling model is proposed to determine the most economic CCHP commercial building system integrated with a three-way valve. In the day-ahead scheduling stage, the schedule is planned using the lowest operating costs of the system. In the real-time correction stage, the correction strategy employs minimum adjustment of the output of each unit. Moreover, the schedule plan is corrected to smooth out fluctuations in the loads and renewable energy resources (RES) in a timely manner to better absorb green energy. The day-ahead scheduling model is a large-scale mixed integer nonlinear programming (MINLP) problem solved through a linearization method proposed in this study and the mixed integer linear programming method. The real-time correction optimization model is a nonlinear programming problem solved by the quantum genetic algorithm (QGA). A case study is employed to demonstrate that the IoT-based SEMS improves the system automation energy management level and user comfort. Furthermore, the proposed system structure can significantly reduce system operating costs and improve the utilization of waste heat from the internal combustion engine. In conclusion, the economic and environmental superiority of the two-stage optimal dispatch model is verified.

Highlights

With increasing concerns regarding energy consumption and environmental protection, developing renewable energy systems and improving comprehensive energy utilization efficiency are obvious ways of resolving the discrepancy between growing energy demands and energy shortages, energy use, and the need for environmental protection [1], [2]
Compared to that without the three-way valve (TV), the system proposed in this study reduces costs by 3.77%
A CCHP system combined with an smart energy management system (SEMS) based on the Internet of Things (IoT) was proposed in this study

Summary

INTRODUCTION

With increasing concerns regarding energy consumption and environmental protection, developing renewable energy systems and improving comprehensive energy utilization efficiency are obvious ways of resolving the discrepancy between growing energy demands and energy shortages, energy use, and the need for environmental protection [1], [2]. Through IoT and CCHP technology, the commercial building energy supply system can become an intelligent service system with comprehensive state perception, efficient information processing, and flexible application Such a data-driving system can provide users with more intelligent and personalized demand services [6], [7]. Introducing a smart energy management system (SEMS) through IoT into the CCHP system will provide accurate data for optimal real-time operation and calculation, achieve efficient information processing, and control all units to work primarily according to their schedules, it will determine the system status, operation information, and user status information in real time, thereby improving the energy efficiency, economy, and reliability of the system [9].

SYSTEM MODELING

Findings

CONCLUSION