District Energy Center-Based Multi-Objective Optimization of Resident Electricity-Heat Energy Consumption

doi:10.12204/j.issn.1000-7229.2021.02.008

Abstract

Abstract:

For the shortage of only electricity being considered in the resident energy consumption optimization, a new multi-objective optimization method for residential energy consumption coupling electricity-heat energy conversion appliances and district energy center (DEC) is proposed in this paper. To achieve generality, a general modeling method for resident consumption with DEC coupled is proposed according to the concept of energy hub at first time. Further, by constructing a mixed integer quadratic programming model which takes the minimum energy cost and least user discomfort as the object, the method takes the input power of residential energy conversion appliances and the energy conversion and storage equipment in DEC as the decision variables, and takes the feasibility and safety constraints into account. The multi-objective optimization of residential electricity-thermal energy consumption is realized. At the same time, to obtain the multi-objective optimal compromise solution, the satisfaction index of Pareto optimal solution is introduced according to fuzzy membership function. Finally, the verification and comparative analysis of the proposed algorithm are carried on energy consumption optimization for residents in a certain area in winter. The results show that the coupling and coordinated operation of household energy conversion appliances and DEC can optimize residential electricity and heat energy consumption at the same time and reduce the cost of residential energy consumption efficiently. Besides, the proposed multi-objective optimization scheduling model can provide users with multi-factor optimization scheme considering the economy and comfort of users.

Key words: district energy center (DEC), energy conversion appliances, resident energy consumption optimization, multi-objective optimization

CLC Number:

TM73

KUANG Cuizhe, ZHANG Yongjun, WANG Qun, ZOU Zhouyiao. District Energy Center-Based Multi-Objective Optimization of Resident Electricity-Heat Energy Consumption[J]. ELECTRIC POWER CONSTRUCTION, 2021, 42(2): 58-67.

Figures/Tables 14

Fig.1 Resident energy consumption system coupled with DEC

Fig.2 Resident energy consumption system coupled with DEC in a district

Fig.3 Pareto frontier of resident energy consumption optimization

Fig.4 User energy source distribution under optimal compromise solution

Table 1 Comparison of results in different optimization objectives

Table 2 User energy cost comparison of the two methods

Table A1 Parameters of energy converters and conversion appliances

Table A2 Parameters of energy storage equipment

Table A3 Parameters of energy converters and conversion appliances in the application scene of reference[13]

Fig.A1 Time series curves of electricity price and natural gas price

Fig.A2 Curves of outdoor temperature and cold-water temperature

Fig.A3 Prediction curves of residential electrical load and hot water demand

Fig.A4 Output curve of photovoltaic power

Fig.A5 Curve of user heat load

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