IES Low-Carbon Economic Optimal Dispatch of Pressure-Energy Generation in Natural Gas Pipeline Network Considering Carbon Offset and Carbon Trading

doi:10.12204/j.issn.1000-7229.2023.06.005

Abstract

Abstract:

To control carbon emissions due to energy consumption and to achieve the objectives of carbon peaking and carbon neutrality, a step-by-step carbon-trading mechanism is proposed that considers carbon offsets. Additionally, the economic and environmental benefits of using natural gas pipelines to generate electricity were considered based on the complementary characteristics of multiple energy sources, such as electricity, heat, and gas, and the principle of energy cascade utilization. A low-carbon economic optimization scheduling model was developed for an integrated energy system of electricity-heat-gas cogeneration, and a case study was performed. First, a carbon-trading mechanism that included carbon offset was established, with the environmental cost incorporated into the system economic optimization target. Subsequently, a power generation model utilizing the pressure of natural gas pipelines was developed using the exergy analysis method, while relevant constraints were determined by combining other unit output and energy transmission network models within the system. The aim of minimizing the operating cost of the system and reducing carbon emissions was achieved by developing an overall framework for the integrated energy system, and low-carbon economic optimization scheduling was conducted based on the case study. This approach reduces the operating cost of the system, energy consumption, and carbon emissions. Furthermore, it prevents the adverse effects on the upstream power grid caused by the fluctuations in power demand.

Key words: carbon offset, carbon trading, pressure energy generation, integrated energy system, optimal dispatching of low-carbon economy

CLC Number:

TM743

QIU Bin, YAO Mingcheng, WANG Kai, LIU Hongzhi, MU Huibin, ZHANG Zhichao. IES Low-Carbon Economic Optimal Dispatch of Pressure-Energy Generation in Natural Gas Pipeline Network Considering Carbon Offset and Carbon Trading[J]. ELECTRIC POWER CONSTRUCTION, 2023, 44(6): 41-52.

Figures/Tables 14

Fig.1 IES structure of power generation with pressure energy

Fig.2 Schematic diagram of ORC waste heat power generation system

Fig.3 The structure diagram of IES system

Fig.4 Electric load and time-of-use electricity price

Fig.5 Natural gas load and heat load

Table 1 Daily running cost of IES in different scenarios

Fig.6 Power consumption in different scenarios in different periods

Fig.7 Output and power purchase of each unit of the system in scenario 1

Fig.8 Output and power purchase of each unit of the system in scenario 2

Fig.9 Output and power purchase of each unit of the system in scenario 3

Fig.10 Thermal output of each unit of the system in scenario 3

Table B1 System example parameters

Table B2 Parameters of 8 nodes natural gas network

Table B3 Parameters of 7 nodes heating network

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