An analysis method of electrical power cable retirement policy

2015 ◽  
Author(s):  
Hang Liu ◽  
Youyuan Wang ◽  
Jun Liu ◽  
Weigen Chen
Keyword(s):  
Electrical Power ◽  
Power Cable ◽  
Analysis Method ◽  
Retirement Policy

Mechanical Qualification of Dynamic Deep Water Power Cable

2011 ◽  
Author(s):  
Roger Slora ◽  
Stian Karlsen ◽  
Per Arne Osborg
Keyword(s):  
Water Depth ◽  
Deep Water ◽  
Failure Modes ◽  
Electrical Power ◽  
Oil And Gas Industry ◽  
Electrical Heating ◽  
Power Cable ◽  
Water Power ◽  
System Integrity ◽  
Water Depths

There is an increasing demand for subsea electrical power transmission in the oil- and gas industry. Electrical power is mainly required for subsea pumps, compressors and for direct electrical heating of pipelines. The majority of subsea processing equipment is installed at water depths less than 1000 meters. However, projects located offshore Africa, Brazil and in the Gulf of Mexico are reported to be in water depths down to 3000 meters. Hence, Nexans initiated a development programme to qualify a dynamic deep water power cable. The qualification programme was based on DNV-RP-A203. An overall project plan, consisting of feasibility study, concept selection and pre-engineering was outlined as defined in DNV-OSS-401. An armoured three-phase power cable concept assumed suspended from a semi-submersible vessel at 3000 m water depth was selected as qualification basis. As proven cable technology was selected, the overall qualification scope is classified as class 2 according to DNV-RP-A203. Presumed high conductor stress at 3000 m water depth made basis for the identified failure modes. An optimised prototype cable, with the aim of reducing the failure mode risks, was designed based on extensive testing and analyses of various test cables. Analyses confirmed that the prototype cable will withstand the extreme loads and fatigue damage during a service life of 30 years with good margins. The system integrity, consisting of prototype cable and end terminations, was verified by means of tension tests. The electrical integrity was intact after tensioning to 2040 kN, which corresponds to 13 000 m static water depth. A full scale flex test of the prototype cable verified the extreme and fatigue analyses. Hence, the prototype cable is qualified for 3000 m water depth.

scholarly journals An Application of Residual Voltage for Diagnosis of Electrical Power Cable used in Nuclear Power Station

1996 ◽  
Vol 116 (5) ◽  
pp. 619-625
Author(s):  
Sanshiro Yamanaka ◽  
Tadashi Fukuda ◽  
Kazumi Ito ◽  
Junko Tomita ◽  
Tadao Seguchi
Keyword(s):  
Nuclear Power Station ◽  
Nuclear Power ◽  
Electrical Power ◽  
Power Cable ◽  
Power Station ◽  
Residual Voltage

Cable JIP: A Research Project to Assess the Feasibility of a Semi-Static Electrical Subsea Cable for the Power Take-off from a TLP-type Floating Offshore Wind Turbine

2021 ◽  
Author(s):  
J. J. de Wilde ◽  
C. G. J. M. van der Nat ◽  
L.. Pots ◽  
L. B. de Vries ◽  
Q.. Liu
Keyword(s):  
Wind Turbine ◽  
Numerical Models ◽  
Electrical Power ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Power Cable ◽  
Test Case ◽  
Research Project ◽  
Floating Offshore Wind Turbine ◽  
Cost Of Energy

Abstract CABLE JIP research project in 2017-2019 was initiated with the aim of studying the feasibility of deploying a novel semi-static electrical cable for the power take-off from a TLP-type Floating Offshore Wind Turbine (FOWT). Today, expensive dynamic electrical cables are mainly used for the power take-off from demonstrator project FOWTs or from new FOWTs on the drawing board. For a TLP-type FOWT, the use of a semi-static electrical power cable instead of a fully dynamic electrical power cable (umbilical) is an attractive option to reduce the levelized cost of energy (LCoE). However, the electrical power cable in a dynamic offshore environment is vulnerable to failure, either at the floater side or at the seabed touchdown area. Moreover, the electrical power cable for power take-off is typically non-redundant, while the availability of the turbine(s) highly depends on this critical component to transport the produced power to the substation. The paper discusses the results of the CABLE JIP research project, with focus on the verification and calibration of the numerical models for the ULS and FLS assessment of the electrical power inter-array cable for a harsh weather test case with a TLP-type floating offshore wind turbine in 96.5 m water depth.

Study on Voltage Stability of Electricity Network Structure Based on the Eigenvalue Method

2011 ◽  
Vol 299-300 ◽  
pp. 870-873 ◽  
Author(s):  
Bao Chun Lu ◽  
Yi Liu ◽  
Bao Guo Li ◽  
Jin Wang
Keyword(s):  
Network Structure ◽  
Voltage Stability ◽  
Structural Characteristics ◽  
Electrical Power ◽  
Analysis Method ◽  
Electrical Power System ◽  
Large Power ◽  
Eigenvalue Method ◽  
Injection Model ◽  
Close Relationship

A new Structural analysis method of voltage stability in large power grid is proposed based on the eigenvalue Method in this paper. the method establishes an improved current injection model of Y+D matrix of the topological structural characteristics, which is helpful to the study of mechanism of voltage instibility. Through calculating the eigenvalue of the Y+D matrix, influence of network topology structure to the voltage stable in the electrical power system is analyzed. The simulation results show that voltage stability has close relationship with topological structure of the power network structure.

Risk Mitigation Through the Application of New Power Umbilical Technology

2012 ◽  
Author(s):  
Alan Dobson ◽  
Steven Frazer
Keyword(s):  
Aluminum Alloy ◽  
Deep Water ◽  
Risk Mitigation ◽  
Electrical Power ◽  
Structural Response ◽  
Power Cable ◽  
Enabling Technology ◽  
Effect Analysis ◽  
Design Case Study

This paper describes the substantial service life improvements that can be achieved through a new, high technology solution developed for deep water electrical power umbilical and cable applications. The new design represents an enabling technology for power cable projects in the deepest and most dynamic waters, provides a lower risk solution for risers in highly stressed conditions and can give a technically improved solution for the range of electrical power umbilical application. The significant advantages of aluminum alloy cable bundles over traditional copper cable bundles under static and dynamic loading associated with a typical deep water floating installation are presented. A design case study is used to illustrate improvements in structural response and fatigue life associated with the aluminum alloy cable cores against conventional technologies. The paper concludes with an overview of the associated risk reduction through the implementation of the aluminum alloy cables in the form of a failure mode and effect analysis.

scholarly journals Interference Analysis of Medium Voltage Air Line 20 KV Feeder Using Failure Mode and Effects Analysis Method

2020 ◽  
Vol 1 (6) ◽  
pp. 28-34
Author(s):  
Yan Min Tun ◽  
Aung Than Win
Keyword(s):  
Failure Mode ◽  
Reliability Index ◽  
Electrical Power ◽  
Distribution Network ◽  
Analysis Method ◽  
Interference Analysis ◽  
Medium Voltage ◽  
Index Value ◽  
The Impact ◽  
Three Phases

This article discusses the interference analysis of medium voltage air line 20 kv feeder using failure mode and effects analysis method. The distribution network consists of two parts, the first the distribution network consists of two parts, the first is the medium / primary voltage (JTM) network, which supplies electrical power from the sub-transmission substation to the distribution substation, the primary distribution network uses three wires or four wires for three phases. the impact of the reliability index from the calculation of the impact of the reliability index based on the number of disturbances (SAIFI), it shows that in January 2019 it has the highest index value, namely SAIFI, 1,695 disturbances/ subscribers. From the results of the calculation of the impact of the reliability index based on the number of blackouts (SAIDI), it shows that in January 2019 the SAIDI index value was 3,883 hours/customer.

Longer Tiebacks by Electrification and Remote Power

2021 ◽  
Author(s):  
Julien Verdeil ◽  
Julien Manach
Keyword(s):  
Power Distribution ◽  
New Technologies ◽  
Electrical Power ◽  
Power Cable ◽  
Technical Solution ◽  
Low Carbon ◽  
Long Distance ◽  
Field Development ◽  
Center Location ◽  
Distribution Of Power

Abstract Standard field architecture is generally based on topsides production and distribution of power and chemicals necessary to operate equipment in drill centers. The paper will present efficient field architectures adapted to operate remote tie-backs with different combinations of subsea electrical power distribution, remote power generation and storage, and improved ways to mitigate corrosion, hydrates and wax issues for long tie-backs. Developing remote resources requires several technology bricks that enable a cost effective and reliable technical solution. To reduce the CAPEX, the main objective is to reduce the number of tubes typically with one single heated flowline to avoid a long and costly service line or with one small power cable and local distribution of power to avoid a heavy and expensive large umbilical. Alternatively, power can be generated and stored at drill center location and chemicals can also be managed locally with limited OPEX. A significant focus was done recently on technology developments enabling long distance tie-back developments. Domain of application and interest of each technology is generally well known and the delivered value is well presented. Looking for the most appropriate combination of technologies on a new field development is now the new challenge to figure out new opportunities. This paper proposes to group the long distance tie-backs fields in three main categories based on extensive studies done for several operators and to present the best architecture for each category. The first category groups very long distance single end tie-backs for which a cold flow system combined with full electrical equipment at drill center location is adapted. The second one is applicable for more consequent development where several drill centers are combined to one long and heated export line; with subsea electrical distribution to power each branch of the remote field and local management of chemicals at each drill center. The third category groups all daisy chain developments for which a heated line gathers the production coming from each fully electrical drill center. Each field development can generally be categorized in one out of the three categories presented in this paper. Based on this categorization, the right combination of low carbon and reliable new technologies enables valuable development of long tie-backs and then increases utilization area of each existing asset.

The Electric Field Analysis of the Warm Dielectric HTS Power Cable

2013 ◽  
Vol 347-350 ◽  
pp. 1276-1282
Author(s):  
Yu Ping Teng ◽  
Shao Tao Dai ◽  
Li Ye Xiao ◽  
Dong Zhang ◽  
Bing Song Cheng
Keyword(s):  
High Temperature ◽  
Electric Field ◽  
Electric Field Distribution ◽  
Field Analysis ◽  
Power Cable ◽  
Distribution Characteristic ◽  
Analysis Method ◽  
Structural Part ◽  
M 10 ◽  
Electric Field Analysis

The 75 m/1.5 kA AC high-temperature superconducting cable(75 m HTS cable) and the 360 m/10 kA DC HTS power cable (10 kA HTS cable), which are supported by Chinese State 863 projects, are both of the demonstration projects facing to industrialization application. The characteristic in structure of warm dielectric (WD) insulated HTS cable is introduced. The electric field distribution characteristic at the cryogenic envelope body, the end-point of metallic shield layer at the end of the HTS cable and the connection sections are analyzed; the controlling method for electric field stress is introduced; there is serious concentration of electric field both in the termination and the connection sections between the termination and the cryogenic envelope. It is difficult to calculate the electric field of the part with irregular or special structure by resolution analytical methods, and the numerical analysis method is effective to analyze the electric field of the shaped structural part for HTS cable. The electric analysis, simulation, the design and processing of insulation for the two cables are finished based upon these two cables run well by now.

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