Multi-objective Optimization Model for Park-Level Electricity-Heat-Gas Integrated Energy System Considering P2G and CCS

doi:10.12204/j.issn.1000-7229.2020.12.009

Abstract

Abstract:

Carbon capture and renewable energy utilization have become effective measures to reduce carbon emission. However, the utilization of captured carbon dioxide is not clear and the curtailment of wind and solar power is serious, which limits the reduction effects. This paper couples the power to gas (P2G) technology and carbon capture system (CCS), and extends it into the park-level integrated energy system including electricity, heat and gas, and proposes an economic and low carbon scheduling model under the high renewable energy penetration level. Through the coupling of CCS and P2G, most of the CO2 emitted by the system can be captured and sent to synthesize gas, which provides a new idea for the reutilization of CO2 rather than storage. In addition, the simulation results also show that the presence of CCS and P2G significantly improves the system's ability to receive renewable energy. Sensitivity analysis of P2G capacity shows that increasing P2G capacity can reduce the energy curtailment rate, but cause more carbon emissions. Therefore, the capacity planning of P2G should comprehensively consider the relationship between renewable energy availability and carbon emissions.

Key words: integrated energy system, power to gas (P2G), carbon capture system(CCS), multi-objective optimization, improved entropy weight method

CLC Number:

TM732

ZHANG Xingping, ZHANG Youzhong. Multi-objective Optimization Model for Park-Level Electricity-Heat-Gas Integrated Energy System Considering P2G and CCS[J]. ELECTRIC POWER CONSTRUCTION, 2020, 41(12): 92-101.

Figures/Tables 14

Fig.1 Structure of an IES

Fig.2 Solution steps

Table 1 Scenario setting

Fig.3 Energy load in a typical day

Fig.4 Wind and solar condition in a typical day

Table 2 Prices of electricity, heat and gas

Fig.5 Electric dispatch and SOC of ESS

Fig.6 Heat dispatch and SOC of TSS

Fig.7 Gas dispatch in Case 2 and 4

Table 3 Dispatch cost of Case 1-4 元

Fig.8 Carbon utilization and emission

Fig.9 Renewable energy curtailment

Fig.10 Sensitivity analysis of wind power

Fig.11 Sensitivity analysis of P2G capacity

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