Energy Flow Analysis Method and Energy Efficiency Evaluation of Integrated Energy Service Station System

doi:10.12204/j.issn.1000-7229.2022.04.015

Abstract

Abstract:

Improving energy utilization efficiency is one of the main goals of the construction of integrated energy service stations. In order to reflect the characteristics of energy utilization, conversion and loss of integrated energy service stations, this paper firstly considers three aspects of macro-energy efficiency micro-energy efficiency and energy economy. Six evaluation indices for energy utilization, renewable energy utilization, EV charging station energy efficiency, data center energy efficiency, energy economic cost, and economic development adaptability are proposed, and an energy efficiency evaluation index system for integrated energy service stations is established. Secondly, the weighted directed graph is used to simulate the internal energy flow of the integrated energy service station, and the calculation method of the system energy flow and the energy efficiency evaluation method are proposed. Finally, this paper takes an integrated energy service station as an example, an evaluation scenario of integrated energy service station is established, and the proposed method is applied to conduct a comprehensive energy efficiency evaluation of the system. The results show that the model and evaluation method proposed in this paper can reflect the energy utilization in the system, is suitable for the pre-evaluation of system energy efficiency, and has reference significance for the planning and operation of the integrated energy service station.

Key words: energy integrated service station, index system, directed graph, energy efficiency evaluation

CLC Number:

TM73

LI Yan, XI Wenqing, LIU Ziyan, MA Chen, ZHANG Qun, WANG Qiu, WANG Qingshan, LIANG Haifeng. Energy Flow Analysis Method and Energy Efficiency Evaluation of Integrated Energy Service Station System[J]. ELECTRIC POWER CONSTRUCTION, 2022, 43(4): 140-148.

Figures/Tables 15

Fig.1 Schematic diagram of integrated energy service station system

Fig.2 Energy flow diagram of the integrated energy service station system

Fig.3 The black box model

Fig.4 Comprehensive energy efficiency evaluation index system of integrated energy service station

Fig.5 Example graph of weighted directed graph

Fig.6 Index calculation flow chart

Fig.7 Flow chart of weight calculation

Fig.8 The evaluation model

Table 1 Basic data of the integrated energy service station system

Fig.9 Directed graph of the integrated energy service station system

Table 2 The system path set

Fig.10 Typical daily load and light conditions of the integrated energy service station

Fig.11 System input power diagram

Table 3 Energy efficiency index parameters and calculation results

Table 4 Results of energy efficiency assessment

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