Expansion Programming of Integrated Energy System for Large Industrial User Considering the CCHP

doi:10.12204/j.issn.1000-7229.2021.02.013

Abstract

Abstract:

Large industrial user is a multi-energy supply system. Traditional integrated energy planning of large industrial users ignores the participation of various energy sources. This paper presents a new approach for solving the integrated energy system(IES) planning problem for large industrial user particularly considering the combined cooling, heating and power (CCHP), as well as the transfer of cooling, heat and electric loads with the production tasks. The proposed optimization model is to minimize the comprehensive cost of the system which includes the interaction cost with the selling company, the investment cost, operation and maintenance cost, and fuel cost of CCHP, and the transfer cost of production tasks. Prevailing constraints include multi-energy coupling balance constraint, technical constraint of power generation equipment and load scheduling limits of transferrable production tasks. The model optimizes the capacity configuration of CCHP. The model is a large-scale mixed integer linear programming (MILP) model, whose simulated results of the case studies validate that consideration of CCHP can increase the flexibility of energy consume and effectively reduce the comprehensive cost of large industrial users.

Key words: combined cooling, heating and power (CCHP), large industrial user, integrated energy system(IES), mixed integer linear programming(MILP)

CLC Number:

TM715

YANG Xiaoting, SHU Jun. Expansion Programming of Integrated Energy System for Large Industrial User Considering the CCHP[J]. ELECTRIC POWER CONSTRUCTION, 2021, 42(2): 107-115.

Figures/Tables 12

Fig.1 Structure of integrated energy system and energy flow for large industrial user

Table 1 Equipment capacity limits and cost parameters of CCHP

Table 2 IES planning results and cost data of large industrial user

Fig.2 Electrical load and equipment output of the large industrial user

Fig.3 Cooling load and equipment output of the large industrial user

Fig.4 Heat load and equipment output of the large industrial user

Fig.5 Transferable production tasks of the large industrial user

Table 3 Comparison of cost results in each case

Table A1 Electricity prices

Table A2 Equipment parameters of the large industrial user

Table A3 Cooling and heat energy required by buildings

Table A4 Parameters of transferable production tasks

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