Analysis of Hydraulic Conditions in Urban Natural Gas Transmission and Distribution Network

2011 ◽  
Vol 121-126 ◽  
pp. 2426-2430
Author(s):  
Yun You ◽  
Lin Li ◽  
Long Zhu Gao
Keyword(s):  
Steady State ◽  
Natural Gas ◽  
Distribution Network ◽  
Network Node ◽  
Steady State Analysis ◽  
Matlab Program ◽  
Hydraulic Conditions ◽  
Natural Gas Transmission ◽  
Accident Conditions ◽  
Transmission And Distribution

Based on the network node model and with the help of MATLAB program, we calculated normal and accident hydraulic conditions in urban natural gas transmission and distribution network. In particular, we analyzed and discussed the corresponding measures under accident conditions. It can provide the basis for remote controlling, pressure regulating and steady-state analysis in transmission and distribution network.

Fault Diagnosis System Based on Dynamic Bayesian Network

2011 ◽  
Vol 55-57 ◽  
pp. 1824-1829
Author(s):  
Hong Bo Wang ◽  
Zhong Gui Ma ◽  
Xu Yan Tu
Keyword(s):  
Fault Diagnosis ◽  
Natural Gas ◽  
Bayesian Network ◽  
Distribution Network ◽  
Dynamic Bayesian Network ◽  
Start Time ◽  
Inference System ◽  
Basic Model ◽  
Natural Gas Transmission ◽  
Transmission And Distribution

The paper focus on dynamic bayesian network (DBN) inference system and its application on the natural gas transmission and distribution network for the system fault diagnosis which is including time restriction (that is the earliest start time and the latest end time) for task. DBN is a graphic model which can describe the relationships between variable data, and used for reasoning. After we research the basic model of DBN, and the maximum depend algorithm is improved which which can increase the feasibility of natural gas transmission and distribution network system. we can see the new model is more accuracy than the traditional technical fault diagnosis clearly. Also, simulation result can verify the design of DBN is effectively and valuable.

Robotic Inspection of Unpiggable Natural Gas Transmission and Distribution Pipeline

2010 ◽  
Author(s):  
Paul Laursen ◽  
Daphne D’Zurko ◽  
George Vradis ◽  
Craig Swiech
Keyword(s):  
Natural Gas ◽  
Visual Inspection ◽  
Modular Design ◽  
Development Effort ◽  
Robotic Platform ◽  
Non Destructive Evaluation ◽  
Natural Gas Transmission ◽  
Self Powered ◽  
Transmission And Distribution ◽  
Non Destructive

The present paper presents the development effort and pre-commercial deployment of Explorer II — a semi-autonomous, self-powered, tetherless robotic platform, carrying a Remote Field Eddy Current (RFEC) sensor, for the inspection of unpiggable natural gas transmission and distribution pipelines in the 6 to 8 inch (152 to 203 mm) range, including those that feature multiple diameters, short radius and mitered bends, and tees. The system is based on a modular design that allows the system to be deployed in various configurations to carry out visual inspection and/or non-destructive evaluation (NDE) of a pipeline. The heart of this system is a RFEC sensor able to measure the pipeline’s wall thickness. In addition, two fisheye cameras at each end of the robot provide high quality visual inspection capabilities for locating joints, tee-offs, and other pipeline features. The system can operate, including launching and retrieval, in live pipelines with pressures up to 750 psig (50 bars). The system is currently being offered for pre-commercial deployments and is expected to be commercially available in the Fall of 2010.

scholarly journals A Unique Electrical Model for the Steady-State Analysis of a Multi-Energy System

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5753
Author(s):  
Danko Vidović ◽  
Elis Sutlović ◽  
Matislav Majstrović
Keyword(s):  
Steady State ◽  
Natural Gas ◽  
Energy System ◽  
Load Flow ◽  
Steady State Analysis ◽  
Gas Network ◽  
Natural Gas Network ◽  
Electrical Analogy ◽  
Unique Model ◽  
State Analysis

In order to decarbonize the energy sector, the interdependencies between the power and natural gas systems are going to be much stronger in the next period. Thus, it is necessary to have a powerful simulation model that is able to efficiently and simultaneously solve all coupled energy carriers in a single simulation environment in only one simulation step. As an answer to the described computational challenges, a unique model for the steady-state analysis of a multi-energy system (MES) using the electrical analogy approach is developed. Detailed electrical equivalent models, developed using the network port theory and the load flow method formulation, of the most important natural gas network elements, as well as of the linking facilities between the power and natural gas systems, are given. The presented models were loaded up into a well-known software for the power system simulation—NEPLAN. In the case studies, the accuracy of the presented models is confirmed by the comparison of the simulation results with the results obtained by SIMONE—a well-known software for natural gas network simulations. Moreover, the applicability of the presented unique model is demonstrated by the MES security of a supply analysis.

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