Low Carbon Economic Dispatch of Gas Electricity Coupling System Considering Carbon Capture and Hydrogen Mixing in Gas Grid

doi:10.11930/j.issn.1004-9649.202210024

Abstract

Abstract:

For the problem of low-carbon dispatch of gas-power integrated energy system, gas-grid hydrogen blending, carbon capture and electricity-to-gas conversion are all effective technical means. Meanwhile, carbon trading mechanism is also an effective economic means to control carbon emission. Therefore, this paper constructs a carbon capture plant model with liquid-rich and liquid-poor tanks, combined with an electric-to-methane technology model to flexibly recover and utilize CO₂ in the system. Secondly, a gas-grid hydrogen blending technology model is used to improve energy efficiency, while considering the nodal calorific value change constraint during gas-grid hydrogen blending. Then the sum of incentive carbon trading cost and operation cost is used as the objective function. Finally, an arithmetic test is carried out based on the improved Belgian 20-node natural gas system and IEEE 39-node power system models. The results verify that the integrated consideration of carbon capture, gas network hydrogen blending and incentive carbon trading mechanism can improve the low carbon economic dispatch of the system. The carbon price and incentive factor can be adjusted flexibly to regulate the system carbon emission level.

Key words: liquid storage carbon capture, mixed hydrogen in gas network, electricity to gas, low carbon economic dispatch

Yuxuan YANG, Dongliang GAO, Yiming CHEN, Buxiang ZHOU, Yang CHEN, Tianlei ZANG. Low Carbon Economic Dispatch of Gas Electricity Coupling System Considering Carbon Capture and Hydrogen Mixing in Gas Grid[J]. Electric Power, 2023, 56(10): 1-10.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202210024

https://www.electricpower.com.cn/EN/Y2023/V56/I10/1

Figures/Tables 8

Fig.1 Schematic diagram of liquid storage carbon capture model

Fig.2 Model solving process

Fig.3 Test structural diagram of gas-electricity coupling system

Fig.4 Values of wind power forecasts, electrical loads and gas loads of the test system

Table 1 Scheduling results for 4 scenarios

场景	碳排放/t	运行成本/万元	总成本 /万元	弃风量/MW
1	18201.83	14660.37	14657.52	2111.62
2	17934.24	14425.44	14420.63	523.34
3	17528.41	14247.81	14232.20	378.34
4	17014.95	14143.77	14122.59	245.61

Fig.5 Electricity to hydrogen and electricity to methane conversion processes

Fig.6 Effect of change of incentive coefficient on carbon emissions and total cost

Fig.7 Impact of carbon trading price changes on carbon emissions and total costs

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