Brazilian Gas Network Computational Model for Reliability Analysis

2010 ◽  
Author(s):  
Thomaz Carvalho ◽  
Thiago Bilhim ◽  
Gustavo P. D. Ferreira ◽  
Luis F. G. Pires ◽  
Denise Faertes ◽  
...  
Keyword(s):  
Computational Model ◽  
Reliability Analysis ◽  
Gas Pipeline ◽  
Hydraulic Simulation ◽  
Pipeline Network ◽  
Gas Network ◽  
Reliability Management ◽  
Advantages And Disadvantages ◽  
Overall Reliability

This paper presents a discussion of the alternatives and strategies used in the thermo-hydraulic simulation of the Brazilian gas pipeline network. It analyses the advantages and disadvantages of each approach and the option used in order to meet the demands of the overall reliability analysis developed by the Gas Reliability Management Sector of PETROBRAS.

scholarly journals Simulation of Coupled Power and Gas Systems with Hydrogen-Enriched Natural Gas

Energies ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7680
Author(s):  
Yifei Lu ◽  
Thiemo Pesch ◽  
Andrea Benigni
Keyword(s):  
Natural Gas ◽  
Renewable Energy Sources ◽  
Simulation Method ◽  
Gas Pipeline ◽  
Electricity Sector ◽  
Electrical Network ◽  
Pipeline Network ◽  
Gas Network ◽  
Natural Gas Pipelines ◽  
The Impact

Due to the increasing share of renewable energy sources in the electrical network, the focus on decarbonization has extended into other energy sectors. The gas sector is of special interest because it can offer seasonal storage capacity and additional flexibility to the electricity sector. In this paper, we present a new simulation method designed for hydrogen-enriched natural gas network simulation. It can handle different gas compositions and is thus able to accurately analyze the impact of hydrogen injections into natural gas pipelines. After describing the newly defined simulation method, we demonstrate how the simulation tool can be used to analyze a hydrogen-enriched gas pipeline network. An exemplary co-simulation of coupled power and gas networks shows that hydrogen injections are severely constrained by the gas pipeline network, highlighting the importance and necessity of considering different gas compositions in the simulation.

Viability of the Gas Pipeline Network Expansion in Brazil

2002 ◽  
Author(s):  
Sidney Pereira dos Santos
Keyword(s):  
Power Plants ◽  
Investment Decision ◽  
Gas Pipeline ◽  
Hydraulic Simulation ◽  
Pipeline Network ◽  
Network Expansion ◽  
Technical And Economic Analysis ◽  
Short Period ◽  
Expansion Plan ◽  
Transfer Stations

The energy shortage in Brazil prompted for the need of alternative and reliable energy sources that could be put into operation in a short period of time while being environmentally friendly and with flexibility to be installed around the country, taking advantage of the existing electric grid and therefore minimizing overall investments. Gas fired power plants proved to be the best selection, which covered all the requirements. The Ministry of Mines and Energy of Brazil set a program addressing initially 55 thermo power plants totaling about 20,402 MW. From this total 18,263 MW of installed power was from 49 gas fired power plants demanding gas volumes in the range of 88 MMm3/d most of this power to be available from 2001 to 2003. With this challenge, Petrobras has started to design a gas pipeline network expansion plan with investments of more than 1 billion US$ for its system alone, including new gas pipelines, new compressor and custody transfer stations and loop lines. In line with this expansion project more investments are required for the Bolivia-Brazil Gas Pipeline in Bolivia (0.2 billion US$) and Brazil (0.35 billion US$), and the new gas pipeline from Argentina to Brazil (0.25 billion US$) totaling 1.8 billion US$ of additional investments in gas pipeline expansion. All of this expansion design was based on technical and economic analysis that took into consideration the availability of gas supply from Brazil, Bolivia and Argentina. This paper presents the scope of the expansion, the technical and economical assumptions and the hydraulic simulation that was used to allow an investment decision.

Overall reliability analysis on oil/gas pipeline under typical third-party actions based on fragility theory

2016 ◽  
Vol 34 ◽  
pp. 993-1003 ◽  
Author(s):  
Xing-yu Peng ◽  
Dong-chi Yao ◽  
Guang-chuan Liang ◽  
Jian-sheng Yu ◽  
Sha He
Keyword(s):  
Reliability Analysis ◽  
Gas Pipeline ◽  
Third Party ◽  
Oil Gas ◽  
Overall Reliability

Seven Modules Risk Assessment System of Urban Gas Pipeline Network

2009 ◽  
Author(s):  
Qiuju You ◽  
Wei Zhu ◽  
Yongsheng Men
Keyword(s):  
Risk Assessment ◽  
Resource Sharing ◽  
Safety Management ◽  
Gas Pipeline ◽  
Assessment System ◽  
Mathematical Treatment ◽  
Data Resource ◽  
Pipeline Network ◽  
Gas Network

The paper presents a complete risk assessment system of urban natural gas network from seven modules. Pipeline hazard scenarios are analyzed and the reasons for seven modules risk assessment system model are presented. Based on objective data of various pipeline sections, the assessment system also allows sections of pipeline to be ranked into a risk hierarchy by using advanced scientific mathematical treatment methods. The system is displayed in geographic information system (GIS) platform, in order to implement data resource sharing and visualization of assessment results. Therefore, the dynamic and safety management of gas pipeline network is achieved and the safe and reliable operation of urban gas pipeline network can be ensured. An application based on a real case study was undertaken so that the effectiveness of the assessment system could be verified.

scholarly journals Managing the Pressure to Increase the H2 Capacity Through a Natural Gas Transmission Network

2020 ◽  
Author(s):  
Francis Bainier ◽  
Rainer Kurz ◽  
Philippe Bass
Keyword(s):  
Natural Gas ◽  
Partial Pressure ◽  
Gas Flow ◽  
Network Capacity ◽  
Hydrogen Gas ◽  
Gas Pipeline ◽  
Pipeline Network ◽  
Gas Network ◽  
Natural Gas Pipeline ◽  
Partial Pressures

Abstract Gas Transmission System Operators (TSO1) are considering injecting hydrogen gas into their networks. Blending hydrogen into the existing natural gas pipeline network appears to be a strategy for storing and delivering renewable energy to markets [1], [2], [3]. In the paper GT2019-90348 [4], the authors have explored the efficiency of H2-blending in a natural gas pipeline network. The conclusion of the paper is: the energy transmission capacity and the efficiency decrease with the introduction of H2, nevertheless, the authors conclude that it is not an obstacle, but the way of using transmission natural gas networks should be closely studied to find an economic optimum, based both on capital and operating expenses. To establish the comparison, the paper did not take into account the limits of the equipment; all equipment was considered as compatible with any load of hydrogen blending. In the current paper, the idea is to consider the hypothesis that the only factor which has impact on the infrastructure is the partial pressure of H2. The idea is not new, in 1802, Dalton published a law called Dalton’s Law of Partial Pressures [5]. Dalton established empirically that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the individual component gases. The partial pressure is the pressure that each gas would exert when it alone occupied the volume of the mixture at the same temperature. Independent of the limits of the equipment, the authors explore the relationships between a network capacity and its associated pressures in regards to the H2 partial pressure. Within the partial pressure constraint, the goal is to find the maximum H2 flowrate. This flowrate is then compared with a flowrate which is a function of % H2. Nevertheless, steel is subjected to hydrogen invasion while being exposed to hydrogen containing environments during mechanical loading: resulting in hydrogen embrittlement (HE). HE also depends on the textured microstructure. In the final results [6] [7], the measured fatigue data reveals that the fatigue life of steel pipeline is degraded by the added hydrogen. The H2 has an effect on the steel fatigue which is not simply due to the partial pressure. The idea of the authors through the results of their 2 papers is to give the key points to help to find the optimum points for introducing H2 into a natural gas network, because, for them, the idea is that partial pressure is a factor in the equilibrium between H2 capacity and the remaining lifetime of the equipment. This paper shows the interest of the pressure management. With this management, it is possible to reach a constant H2 injection flow independently of the natural gas flow in the pipeline. In conclusion, to optimize the H2 capacity in their current network, a proposal to the TSOs is to adjust their dispatching methodology and their Pipeline Integrity Management (PIM) [8] [9].

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