Sensitivity Identification Method for Gas Pressure Weak Line of Integrated Electricity-Gas System Considering Static Gas Pressure Stability Limit

Chouwei NI; Bo ZHAO; Da LIN; Xiangwei GUO; Zhibin LIU; Yunfei MU

doi:10.12204/j.issn.1000-7229.2023.03.011

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Electric Power Construction ›› 2023, Vol. 44 ›› Issue (3) : 105-112. DOI: 10.12204/j.issn.1000-7229.2023.03.011

Key Technologies for Interaction between Power Distribution Network and New Load Driven by Carbon Peaking and Carbon Neutrality Goals?Hosted by Professor MU Yunfei and Professor-level Senior Engineer SONG Yi?

Sensitivity Identification Method for Gas Pressure Weak Line of Integrated Electricity-Gas System Considering Static Gas Pressure Stability Limit

Chouwei NI ¹ ,
Bo ZHAO ¹ ,
Da LIN ¹ ,
Xiangwei GUO ² ,
Zhibin LIU ² ,
Yunfei MU ²

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Abstract

In an integrated electricity-gas system (IEGS), the rapid growth in power and gas load has led to not only the voltage instability in power system, but also gas pressure drops in natural gas system. It further results in the instability in gas pressure and makes an impact on the security and stability of IEGS. Thus, it is necessary to find how power and gas load growth influences the gas pressure in IEGS. Draw on the idea of power system static sensitivity analysis and on the basis of the unified IEGS multi-energy flow model, this paper constructs two sensitivity matrixes for gas pressure-active load and gas pressure-gas load. The continuous multi-energy flow model is then used to calculate the sensitivity index of gas pressure-total load when the IEGS reaches the stability limit of gas pressure. The weak line of gas-pressure in IEGS can be located according to the index. Finally, results of a case study show the effectiveness of the proposed method in locating the gas pressure weak line of the IEGS.

Key words

integrated electricity-gas system (IEGS) / continuous multi-energy flow / sensitivity index of gas pressure-total load / weak line identification

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Chouwei NI , Bo ZHAO , Da LIN , et al . Sensitivity Identification Method for Gas Pressure Weak Line of Integrated Electricity-Gas System Considering Static Gas Pressure Stability Limit[J]. Electric Power Construction. 2023, 44(3): 105-112 https://doi.org/10.12204/j.issn.1000-7229.2023.03.011

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