Please wait, while we are loading the content...
| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Fan Chun-lei Wu Guang-ning Li Rui-fang |
| Copyright Year | 2008 |
| Description | Author affiliation: Sch. of Electr. Eng., Southwest Jiaotong Univ., Chengdu (Fan Chun-lei; Wu Guang-ning; Li Rui-fang) |
| Abstract | Lightning is the main reason that endangers the safety and reliability of transmission line, but the existing models of estimating shielding failure flashover rate can not be in agreement with field experience at present. This paper deals with shielding failure flashover rate of the EHV transmission lines with many parameters by the improved electric-geometry model. The parameters consist of phase wires, shield wires, and the ground angle. In the improved model, "strike distance" is calculated with the expression recommended by IEEE, "the striking distance factor" is introduced to describe the difference of electric intensity between lightning stroke on the transmission line and the ground, and the "uncovered distance" is adopted to calculate shielding failure flashover rate for ultra high voltage transmission line. Taking 500 kV transmission line as example, the improved electric-geometry model gets the result in agreement with field experience. Compared with the order of the method, it is more accurately. At the same time, the paper analyzes the influence of the shielding angle, the height of wire, the grounding obliquity on shielding failure flashover rate. The results of studies show that the shielding failure flashover rate is a function of the shielding angle, ground angle and the height of tower. It will increase with the increase of the grounding obliquity, protection angle and the height of tower. The simulation calculation shows that when the shielding angle is -6.24 degrees, the shielding failure flashover rate reduces from 0.2135 to 0 in this paper. It will help designers in making the correct economic judgment. |
| Sponsorship | Nat. Natural Sci. Found. China |
| Starting Page | 172 |
| Ending Page | 175 |
| File Size | 1226610 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781424438235 |
| DOI | 10.1109/ICHVE.2008.4773901 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2008-11-09 |
| Publisher Place | China |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Grounding Poles and towers striking distance factor transmission line Transmission lines Wires Lightning Failure analysis Voltage Flashover Safety shielding failure flashover rate Protection uncovered distance |
| Content Type | Text |
| Resource Type | Article |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
| Sl. | Authority | Responsibilities | Communication Details |
|---|---|---|---|
| 1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
| 2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
| 3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
| 4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
| 5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
| 6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
| 7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
| 8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
| 9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
|
Loading...
|