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Wei S.,China Petroleum Pipeline Engineering Corporation
Advanced Materials Research | Year: 2014

The concept of Smart Grid is created this century, with the focus of whole world. With the social development, the requirement of power security is growing fast. China, as a great power towards to industrialized country, its requirement is more intense. This paper introduces the generation of the concept 'smart grid', as well as the inevitable trend of future development, plans of China for smart grid construction and some achievements, finally explains the advantages of China's smart grid development and prospects of the future. © (2014) Trans Tech Publications, Switzerland.

Zhang Y.,University of Science and Technology Beijing | Pang X.,University of Science and Technology Beijing | Qu S.,University of Science and Technology Beijing | Li X.,China Petroleum Pipeline Engineering Corporation | And 2 more authors.
International Journal of Greenhouse Gas Control | Year: 2011

Corrosion experiments were performed with X65 pipeline steel under static supercritical carbon dioxide (SC CO2) conditions at 50, 80, 110 and 130°C. The morphology, structure, chemical composition and fracture toughness of CO2 corrosion scales formed on the surface of X65 pipeline steel at various temperatures were investigated by means of Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD) and Energy Dispersive X-ray Spectroscopy (EDS). The corrosion rates were measured using weight-loss method. The fracture toughness of CO2 corrosion scale formed at different temperatures was investigated by means of nanoindentation and Vicker's indentation on a polished cross-section of the CO2 corrosion scale. The results showed that the corrosion rates increased from 50°C to 80°C and then decreased from 80°C to 130°C. As the temperature increased, the fracture toughness of CO2 corrosion scale first decreased and then increased, and the lowest fracture toughness was found at 80°C. The corrosion rate (CR) has a quantitative relationship with the fracture toughness (KIC)CR=(3.25/KIC3/2)-0.908. © 2011 Elsevier Ltd.

Wang H.,China Petroleum Pipeline Engineering Corporation
ICPTT 2013: Trenchless Technology - The Best Choice for Underground Pipeline Construction and Renewal, Proceedings of the International Conference on Pipelines and Trenchless Technology | Year: 2013

In connection with the types of geo-hazards constituted by karst effect to pipeline ,this paper elaborates the evaluating calculation methods for the stability of karst top slaband estimation formula for the safe distance between karst cave and pipeline. Put forward are the protection measures for pipeline in karst area, including diverting of karst surface water, interception and blocking of water in pipeline trench, over-crossing form of mouth of karst cave and reinforcement of karst cave. © ASCE 2013.

Zhang Y.,University of Science and Technology Beijing | Pang X.,University of Science and Technology Beijing | Qu S.,University of Science and Technology Beijing | Li X.,China Petroleum Pipeline Engineering Corporation | And 2 more authors.
Corrosion Science | Year: 2012

The corrosion behaviour of X65 pipeline steel at various temperatures for different immersion time under low CO 2 partial pressure and supercritical CO 2 condition were investigated by weight loss measurements and surface analysis techniques. By comparing the characteristics of CO 2 corrosion product scale formed under experimental conditions and the variation rule of corrosion rate with temperature, the CO 2 corrosion mechanism under low partial pressure and supercritical condition was studied. To explain the big difference of corrosion rate between low CO 2 partial pressure and supercritical CO 2 condition, thermodynamic calculation of the solubility of CO 2 in H 2O were discussed. © 2012 Elsevier Ltd.

Gao F.-P.,CAS Institute of Mechanics | Yan S.-M.,CAS Institute of Mechanics | Yan S.-M.,China Petroleum Pipeline Engineering Corporation | Yang B.,CAS Institute of Mechanics | Luo C.-C.,University of Western Australia
Ocean Engineering | Year: 2011

The steady flow-induced instability of a partially embedded pipeline involves a complex process of pipesoil interaction. In accordance with the hydrodynamic loading and the dimensionless analyses, a series of pipesoil interaction tests have been conducted with an updated pipesoil interaction facility including a loaddisplacement synchronous measurement system, to reveal the underlying pipesoil interaction mechanism. The effects of pipe surface roughness, end-constraint and initial embedment are investigated, respectively. The values of lateral-soil-resistance coefficient for the rough pipes are bigger than those for the smooth pipes. For a fixed value of non-dimensional submerged weight, the values of lateral-soil-resistance coefficient for the anti-rolling pipes are much larger than those for the freely laid pipes. The effects of initial embedment on the ultimate soil resistance get less with the decrease of the submerged weight of the pipe. A comparison is made between the results of the present mechanical-actuator tests and those of the previous water-flume tests, indicating that those results are quite comparable. For the equivalent level of dimensionless submerged weight, the directly laid pipe in currents has higher lateral stability than in waves. © 2010 Elsevier Ltd. All rights reserved.

Wu Y.,Northwestern Polytechnical University | Guo L.,China Petroleum Pipeline Engineering Corporation
Lecture Notes in Electrical Engineering | Year: 2014

In order to solve the potential issues caused by network induced delays and dropouts which could arise the performance degradation and system instability, this paper studies the stochastic stability problem of Networked control systems (NCSs) with arbitrary time delays and packet dropouts by using an active timevarying sampling method. The random time delays and successive packet dropouts are driven by two separately Markov chains and NCSs are modelled as a discrete time Markovian jump linear systems. Based on Lyapunov approach, sufficient conditions for the stochastic stability of the networked control system are derived and stabilization controller is designed in terms of linear matrix inequalities (LMIs) correspondingly. Gridding approach is introduced to guarantee the solvability of the LMIs with finite jump modes. A numerical example is given to illustrate the effectiveness of the proposed method which stabilizes the NCS with random time delays and packet dropouts. © Springer International Publishing Switzerland 2014.

Chen X.,North China Electrical Power University | Gao H.,China Petroleum Pipeline Engineering Corporation
Procedia Engineering | Year: 2012

The development of computers and the internet have made distance learning easier and faster. In this field, remote laboratories are enabling intensive use of university facilities, while aiding the work of professors and students. The paper introduces a remote laboratory designed to be used in PLC practical work. The relative experiments are described The students can complete the programming exercises at different location and different time on campus. The evaluation is conducted and the experience has proved to be positive, and the students have valued it accordingly. © 2011 Published by Elsevier Ltd.

Sun J.,Yanshan University | Xiao Q.,Yanshan University | Wen J.,Yanshan University | Wang F.,China Petroleum Pipeline Engineering Corporation
Measurement: Journal of the International Measurement Confederation | Year: 2014

As it is difficult to identify the scale and aperture of small leaks occurring in a natural gas pipeline, this paper proposes a small leak feature extraction and recognition method based on local mean decomposition (LMD) envelope spectrum entropy and support vector machine (SVM). First, LMD is used to decompose the leakage signals into several FM-AM signals, i.e. into product function (PF) components. Then, based on their kurtosis features, the principal PF components that contain most of the leakage information are selected. Wavelet packet decomposition and energy methods are used to analyze and then reconstruct the principal PF components. The Hilbert transform is applied to these reconstructed principal PF components in order to acquire the envelope spectrum, from which the envelope spectrum entropy is obtained. Finally the normalized envelope spectrum entropy features are input into the SVM as leakage feature vectors in order to enable leak aperture category identification. By analyzing the acquired pipeline leakage signals in field experiments, it shows that this method can effectively identify different leak categories. © 2014 Elsevier Ltd. All rights reserved.

Xu J.-C.,Tongji University | Guo S.-T.,China Petroleum Pipeline Engineering Corporation
Yantu Lixue/Rock and Soil Mechanics | Year: 2010

In order to exactly calculate the seepage discharge of groundwater in oversize groundwater sealed oil storage of rock caverns, adopting the calculating analysis method of three-dimensional FDM numerical simulation with solid-fluid coupling of porous continuous medium, the seepage field of underground water was simulated by the site investigation, in-situ test and monitoring, and physical mechanics tests. On the premise of guaranteeing economics and security, considering coupling interaction between stress field of surrounding rock and seepage field of groundwater, and water flow condition, a reasonable method to calculate the seepage discharge of groundwater in oversize groundwater sealed oil storage of rock caverns, is presented, connected with an engineering practice. Compared with the results obtained by the presented method, the empirical method of France expert, Hirishi Oshima empirical equation and Investigation Norm of Railway Engineering Hydrogeology (TB10049-96), the results are comparatively consistent. The research results show as follows. Firstly, the presented method is applicable for calculating the seepage discharge or water inflow of groundwater in oversize groundwater sealed oil storage of rock caverns with the feasibility study phase lacking test data. Secondly, the water inflow of single cavern considering groundwater fluid-solid coupling analysis, may be smaller than that only considering the analysis of groundwater flow. Thirdly, considering fluid-solid coupling interaction, the maximum velocity of groundwater seepage of surrounding rock is smaller than that without considering fluid-solid coupling interaction.

Zhao J.,China Petroleum Pipeline Engineering Corporation
ICPTT 2014 - Proceedings of the 2014 International Conference on Pipelines and Trenchless Technology | Year: 2014

This article describes how Tieling City in directional drilling Chaihe ends the case that is out of the soil layer of gravel across the circle to take measures to ensure the successful implementation of technology solutions for directional drilling. According to natural conditions through pipelines across the region and the formation of geological survey data, the experience of previous works reasonably determines the technical program, and the types of adverse geological directional drilling crossing of great reference value. © 2014 American Society of Civil Engineers.

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