Hydraulic reliability analysis of an urban loop high-pressure gas network

Li, Jun; Qin, Chaokui; Yan, Mingqing; Ma, Jiuchen; Yu, Jianjun

doi:10.1016/j.jngse.2015.12.010

Cited by 14 publications

(8 citation statements)

References 12 publications

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“…It is considered that the emphasis of hydraulic reliability analysis is to study the influence of any failure pipeline on the whole gas network by using fluid mechanics. In reference [8], the hydraulic reliability of an urban loop high-pressure gas network is analyzed, and a feasible method for determining the actual nodal flow is presented. After proper adjustments, the method can also be employed to calculate the flow reduction of an urban gas network under failure conditions.…”

Section: Flow Reduction Of An Urban Gas Network Under Different Failure Conditionsmentioning

confidence: 99%

“…The former, from a mechanics point of view, focuses on the research of the probability of structural integrity of each pipeline unit and a whole network, without considering the influence of hydraulic conditions [4][5][6][7]. On the contrary, the latter, from a hydraulics point of view, focuses on whether the network hydraulic regime can satisfy the design requirements for pressure and flow under all possible conditions, especially when any single pipeline is isolated for repair due to failure [8,9]. In fact, the failure of any pipeline is a random probability event, that is, the hydraulic reliability analysis of urban gas networks also ignores the influence of the failure probability of any pipeline.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation on gas supply reliability of urban gas pipeline network

Li¹,

Yan²,

Yu³

2018

Eksploatacja i Niezawodność – Maintenance and Reliability

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Evaluation on gas supply rEliability of urban gas pipElinE nEtwork ocEna niEzawodności dostaw gazu w miEjskiEj siEci gazowEjAs one of the lifeline projects, an urban gas network is a complex system, as it requires maintenance of the supply capacity when any single pipeline is isolated due to failure. For such a system, its reliability needs to be evaluated. Considering that existing structural reliability and hydraulic reliability analyses reflect different aspects of the working conditions of an urban gas network, system reliability theory is employed to explain that only the gas supply reliability can achieve a comprehensive evaluation of the work capacity of the entire urban gas network, as it takes into account the combined influence of the structural reliability and hydraulic reliability. To calculate the parameters in the gas supply reliability evaluation, such as pipeline failure rate, flow reduction in the gas network under different failure conditions, etc., some research achievements in the field of structural reliability and hydraulic reliability are fully utilized. Then, the detailed calculation procedures of these parameters are given to evaluate the gas supply reliability in terms of operational and practical considerations. Finally, using an example of a simple double-loop gas network, the detailed process of the gas supply reliability evaluation of an urban gas network is described, and the feasibility of this evaluation method is also illustrated.

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Section: Flow Reduction Of An Urban Gas Network Under Different Failure Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation on gas supply reliability of urban gas pipeline network

Li¹,

Yan²,

Yu³

2018

Eksploatacja i Niezawodność – Maintenance and Reliability

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“…Li et al 33 Af = w, A T 2 = Δ , GΔ = f ⇒ AGA T 2 = w Han and Weng 34 In Li et al, 33 G is defined as the admittance matrix of gas network; In Han and Weng, 34 Y = AGA T is defined as the admittance matrix of gas network. domness of wind power by using the Newton-Raphson method and Monte Carlo simulation, where the concept of pipeline resistance and admittance were introduced in the modeling.…”

Section: Sun and Ayala 29mentioning

confidence: 99%

“…The nonlinear nonconvex combined gas and electricity optimal energy flow model was solved by decoupling the electric and gas loadflow problems and employing a primal‐dual interior‐point method. In previous studies,() integrated quantitative risk analysis and hydraulic reliability analysis of natural gas pipeline network were, respectively, conducted for the safe and stable supply of natural gas. Thereinto, hydraulic regime of natural gas system was formulated based on the concept of the admittance matrix of gas network.…”

Section: Optimal Gas Flow In Natural Gas Systemmentioning

confidence: 99%

“…For example, the specific definition of gas admittance matrix in our work is Y = AGB , while it is defined as G or AGA T in previous studies. () (b) Our formulations are generalized and applicable to any natural gas system with consideration of compressors, while the formulations in other studies() only apply to gas pipeline network without compressors. That is, our formulations are more closer to the actual natural gas system while the reference formulations would be limited in the applications.…”

Section: Optimal Gas Flow In Natural Gas Systemmentioning

confidence: 99%

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A new modeling and solution method for optimal energy flow in electricity‐gas integrated energy system

2019

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Summary With the increasing interdependency of electricity and gas, it is necessary to simultaneously investigate electric power system and natural gas system from the perspective of an electricity‐gas integrated energy system (EGIES). As an extension and integration of both optimal power flow (OPF) and optimal gas flow (OGF), optimal energy flow (OEF) is regarded as the cornerstone of the EGIES and lays an essential foundation for further research on the EGIES's operation and analysis considering stochastic conditions and contingency states. The objective of this paper is to develop a generalized mathematical model and a universally applicable simulation tool for the OEF problem. First, natural gas system is modeled in a way similar to electric power system according to electricity‐gas analogy analysis, where gas admittance, gas nodal admittance matrix, and the nodal equation of gas flow conservation are derived. Then, a generalized accurate OEF model is formulated by simultaneously integrating the OPF model and the OGF model as well as their coupling constraints in a unified modeling framework. Furthermore, an available hybrid optimization approach consisting of whale optimization algorithm, MATPOWER, hydraulic calculation iterative program, and nonstationary penalty function method is put forward to solve the OEF problem. The accuracy, feasibility, and applicability of the proposed modeling and solution method is finally demonstrated by analyzing Belgian 20‐node gas system combined with IEEE 30‐bus test system.

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