The Realization of a Highly Modulized Open-Ended Distribution System Comprehensive Planning Platform Compatible with CIM Model

2013 ◽  
Vol 805-806 ◽  
pp. 1065-1072
Author(s):  
Kang Ma ◽  
Jun Liu ◽  
Hai Tao Liu ◽  
Tao Wei ◽  
Jian Su
Keyword(s):  
Distribution System ◽  
Input Data ◽  
Poor Quality ◽  
Comprehensive Planning ◽  
Urban Network ◽  
Reliability Indices ◽  
Data Errors ◽  
Corrected Data ◽  
Key Features ◽  
Cloud Computation

This paper introduces key features and the structure of a distribution network comprehensive planning platform as well as the functions and algorithms of core modules. The platform has a number of features, some of which are innovation points: 1) it provides a unified data interface compatible with IEC61968-based CIM model; 2) it adopts an effective algorithm that diagnoses and corrects input data of a relatively poor quality; 3) It converts CIM-based data into data based on calculation models, so that the calculation modules can analyze them. 4) Its reliability analysis module uses an algorithm based on zones. 5) The highly modulized platform has the provision for cloud computation in future. Furthermore, this paper has defined a number of reliability indices based on zones and feeders. The application of the platform in Tianjin urban network has desmonstrated its effectiveness: it successfully corrected data errors with no need for human intervention and yielded satisfactory results.

scholarly journals Integrating the PV-Diesel Hybrid System for Reliability Improvement in Distribution System

2019 ◽  
Vol 3 (2) ◽  
Author(s):  
Cho Cho Myint ◽  
Ohn Zin Lin ◽  
Soe Soe Ei Aung
Keyword(s):  
Power Generation ◽  
Distributed Generation ◽  
Hybrid System ◽  
System Reliability ◽  
Distribution System ◽  
Voltage Drop ◽  
Load Condition ◽  
Voltage Profile ◽  
Hydro Power ◽  
Reliability Indices

In Myanmar, as the main power generation is hydro power generation. the utility cannot supply sufficient power to customers during the dry season. Besides interruptions occur frequently due to aging system and lack of prospered protection. Therefore, reliability is an urgent issue in Myanmar. As a result of unbalance between generation and load, the distribution system is getting poor voltage profile, instability and high power losses in high load condition. According to network characteristics, the failure of a component always leads to consequence interruption in a radial distribution system.  Therefore, it is a must consideration to mitigate these challenges to enhance the system reliability. There are many techniques to solve the reliability problems such as reclosers, switching devices (manual and automated switches), system reconfiguration, feeder re-conducting and integration of distributed generation (DG). In this paper, system reliability assessment is evaluated in detail with the integration of the distributed generation such as PV-Diesel Hybrid System. The location of DG is chosen according to the expected energy not supply (EENS) and the voltage drop in proposed system. Next, the optimal sizing of DG is chosen depends on the penetration level of generator. Reliability indices can be evaluated depending on the failure rate(λ), repair time(r) and annual outage time(U) in Electrical Transient and Analysis Program (ETAP) software. The case study of this thesis is carried out in 33/11 kV network which is connected Kyatminton Substation, Kyaukse, Middle Myanmar.

scholarly journals RANSAC ART Tomography

2019 ◽  
Author(s):  
Владимир Афанасьев ◽  
Vladimir Afanasyev ◽  
Алексей Волобой ◽  
Alexey Voloboy
Keyword(s):  
Input Data ◽  
Optical Tomography ◽  
Data Errors

This paper describes using of per-voxel RANSAC approach in ART tomography. The method works as an addition to any ART and does not depend on its internal details. Firstly, the histograms of voxel map corrections are constructed in each voxel during usual pass of ART. Then, they are used to refine the absorption map. It allows to improve resulting voxel absorption map, reducing ghost effects caused by input data errors and inconsistency. This method was demonstrated with optical tomography algorithm as it has certain difficulties with input data. The proposed algorithm was implemented to run on GPU.

scholarly journals Reliability and protection in distribution power system considering customer-based indices

2021 ◽  
Vol 39 (4) ◽  
pp. 1198-1205
Author(s):  
J.N. Nweke ◽  
A.G. Gusau ◽  
L.M. Isah
Keyword(s):  
Power Supply ◽  
System Reliability ◽  
Distribution System ◽  
Network Performance ◽  
Test System ◽  
Mitigation Strategies ◽  
Reliability Indices ◽  
Electric Power Supply ◽  
Utility Company ◽  
Distribution System Reliability

A stable and reliable electric power supply system is a pre-requisite for the technological and economic growth of any nation. Nigeria's power supply has been experiencing incessant power interruptions caused by a failure in the distribution system. This paper developed a system planning approach as part of the key mitigation strategies for improved reliability and protection of the distribution network. The developed algorithm is tested using 33kV feeder supplying electricity to Kaura-Namoda, Zamfara State,  Nigeria. A customer-based reliability index was used as a tool to evaluate the reliability assessment of the feeder test system. The result showed that alternative 3 gives better results in terms of improvement of the system average interruption duration index (SAIDI), which in turn gives the minimum interrupted energy. Also, it is found that a greater number of sectionalizing switches do not give better results. It is very important to place the sectionalizing switches at a strategic location. If it is located at such points that will facilitate to sectionalize the faulty sections faster and to make the supply available to the unfaulty part of the network. Hence the utility company should apply this mitigation algorithm for system reliability improvement, depending on their needs and requirements. Thus, utilities can optimize network performance and better serve customers by adopting mitigation strategies in addressing trouble-prone areas to achieve a stable and reliable supply Keywords: distribution system; reliability; reliability indices; system performance evaluation; protection system; mitigation algorithms and sectionalizing switches 

Методика практического восстановления параметров формы поверхностных двухмерных дефектов с учетом нелинейных свойств ферромагнетика

2021 ◽  
pp. 46-55
Author(s):  
А.В. Никитин ◽  
А.В. Михайлов ◽  
А.С. Петров ◽  
С.Э. Попов
Keyword(s):  
Magnetic Field ◽  
Free Surface ◽  
Numerical Experiments ◽  
Input Data ◽  
Metal Plate ◽  
Two Dimensional ◽  
Nonlinear Properties ◽  
Data Errors ◽  
The Magnetic Field

A technique for determining the depth and opening of a surface two-dimensional defect in a ferromagnet is presented, that is resistant to input data errors. Defects and magnetic transducers are located on opposite sides of the metal plate. The nonlinear properties of the ferromagnet are taken into account. The components of the magnetic field in the metal were reconstructed from the measured components of the magnetic field above the defect-free surface of the metal. As a result of numerical experiments, the limits of applicability of the method were obtained. The results of the technique have been verified experimentally.

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