2014 11th International Conference on Live Maintenance (ICOLIM)最新文献

{"title":"Health effects of magnetic fields during live-line maintenance","authors":"G. Gõcsei, B. Németh, I. Kiss, I. Berta","doi":"10.1109/ICOLIM.2014.6934329","DOIUrl":"https://doi.org/10.1109/ICOLIM.2014.6934329","url":null,"abstract":"Based on the latest researches and guidelines of International Commission on Non-Ionizing Radiation Protection (ICNIRP) extra-low frequency (ELF) electric and magnetic fields have several short-term and long-term health effects. The short-term effects of these fields is detectable, but the long-term effects are mostly unknown - results of epidemiological investigations are available only. Basically electric fields are determined by the voltage of an equipment and magnetic fields are generated by currents flowing through the conductors. In case of high voltage (HV) live-line maintenance (LLM) both high voltage levels and high currents could endanger the safety of the worker. Electric fields can be easily shielded by a conductive clothing based on the principle of the Faraday-cage, but only properly designed and manufactured clothing can guarantee the required efficiency. This principle of shielding electric fields is not effective against magnetic fields. Results of calculations, simulations and measurements prove that in some cases induced magnetic fields in the body of the live-line worker exceed the current limits defined by ICNIRP. This risk caused by the miss of the proper protection against magnetic fields endangers the safety of the workers and is unacceptable for any period of time during any live-line method.","PeriodicalId":238060,"journal":{"name":"2014 11th International Conference on Live Maintenance (ICOLIM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127468545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Introduction of a training center for LV and MV LLM education","authors":"G. Gõcsei, B. Németh, Jozsef Beres, Zoltan Lipovits","doi":"10.1109/ICOLIM.2014.6934372","DOIUrl":"https://doi.org/10.1109/ICOLIM.2014.6934372","url":null,"abstract":"Live-line maintenance (LLM) became more and more popular in the last decades because of its technical and economic benefits. From the aspect of transmission system operators (TSOs) and distribution system operators (DSOs) different fees related to service outages can be eliminated and losses caused by the resistance of a longer current path can be effectively decreased. From the consumer's point of view electrical energy becomes continuously available during maintenance and repair works executed by live-line technologies. Most of TSOs and DSOs worldwide have own training centers to practice different live-line techniques according to the valid regulations of the country. Education of low voltage (LV), medium voltage (MV) and high voltage (HV) LLM can be separated from each other but also can be executed at the same place. Training centers are often contracted by TSOs and DSOs to guarantee the adequate quality of education of live-line workers. Safety of the workers requires various theoretical and experimental topics to be practiced. Continuous audit during and after the education is widely used to examine the abilities of the workers. Certified independent institutions are also can be allowed to revise different working techniques executed both in the training center and on-site. After a base training (the typical duration is 3-4 weeks) live-line workers are usually obligated to refreshment trainings (usually for 1 week) after a specified period of time.","PeriodicalId":238060,"journal":{"name":"2014 11th International Conference on Live Maintenance (ICOLIM)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126223152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Connection and disconnection of large conductive parts during live working at HV and VHV","authors":"N. Oury, G. Riquel","doi":"10.1109/ICOLIM.2014.6934342","DOIUrl":"https://doi.org/10.1109/ICOLIM.2014.6934342","url":null,"abstract":"During live working at high and very voltage, it may be necessary to connect or disconnect parts of the network, but also large conducting parts. To carry out these operations, it is necessary to control: values of current passing to the place where connection or disconnection is made, particularly if you want to carry out operations using the bare hand working method,; the maximum length of the discharge arc to guarantee LW distances,; but also another fundamental parameter, the connection or disconnection speed, particularly if you want to carry out these operations manually without using an appropriate device.","PeriodicalId":238060,"journal":{"name":"2014 11th International Conference on Live Maintenance (ICOLIM)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123440823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Periodical training of linemen is a guarantee for competent and safe live working","authors":"V. Lovrenčič, Z. Miletić","doi":"10.1109/ICOLIM.2014.6934373","DOIUrl":"https://doi.org/10.1109/ICOLIM.2014.6934373","url":null,"abstract":"Legal foundations for training electricians for live work (LW) differ amongst individual countries. In some places, it is included in education and in others, it is part of the health and safety at work. Some countries regulate it on the level of national agencies and others on the company level. Basic training includes theoretical and practical training in specialised educational centres and polygons with the technical equipment for carrying out the practical programme of LW. Professional literature and manuals talk about the recommended extent of individual initial LW programmes for different voltage levels (HV, MV, LV) and periodical training for the competency sustenance. This paper describes the concepts of training for LW on LV in Slovenia and Croatia, where the legal foundations differ but the training programmes are similar because the training manuals for LW on LV are practically identical and both countries carry out the basic training on the polygon HEP NOC.","PeriodicalId":238060,"journal":{"name":"2014 11th International Conference on Live Maintenance (ICOLIM)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125804221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Live working technologies for bird protection at medium voltage OHL","authors":"T. Jordan, T. Haack, R. Dolata","doi":"10.1109/ICOLIM.2014.6934385","DOIUrl":"https://doi.org/10.1109/ICOLIM.2014.6934385","url":null,"abstract":"Depending on the different legal framework regarding environment protection there exists more or less pressure for European grid operators to upgrade medium voltage OHL with bird protection devices. The larger the area for bird protection demands is the more important are live working methods for install bird protection devices on OHL. The paper deals with different bird protection devices and its live working technologies for installing and mounting. It will be point out, that depending on the used bird protection material most live working technologies are more cost effective than installing bird protection on switched off OHL.","PeriodicalId":238060,"journal":{"name":"2014 11th International Conference on Live Maintenance (ICOLIM)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131786388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On-site verification and improvement of the accuracy of voltage, current and energy measurements with live-line working methods: New equipment, laboratory and field experience, perspectives","authors":"P. Mazza, D. Bosonetto, C. Cherbaucich, G. De Donà, M. Franchi, G. Gamba, M. Gentili, C. D. Milanello","doi":"10.1109/ICOLIM.2014.6934377","DOIUrl":"https://doi.org/10.1109/ICOLIM.2014.6934377","url":null,"abstract":"The opportunity of verifying and, in perspective, improving the accuracy of voltage, current and energy measuring equipment, both new and already installed in service, is looked at with growing interest, both in the framework of the electricity market and to implement Wide Area Measuring Systems, based on phasor measurements, in order to develop the Smart and Super Grid. The availability of transportable Reference Measuring Systems which can be installed by means of live line working methods is a key factor to achieve such goals in a short time, under reasonable costs and without impact on normal service conditions. New methodologies and equipment developed in Italy are presented, as well as the first results obtained during laboratory and on-site testing, with reference to the improvements implemented on the Simplified Transportable Disconnector conceived in order to connect the equipment to the HV network.","PeriodicalId":238060,"journal":{"name":"2014 11th International Conference on Live Maintenance (ICOLIM)","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133787005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RTE POLICY on H V-B Live Working","authors":"D. Godart, L. Devatine","doi":"10.1109/ICOLIM.2014.6934391","DOIUrl":"https://doi.org/10.1109/ICOLIM.2014.6934391","url":null,"abstract":"Since 2011 RTE has been implemented a new policy on live working (LW), with the intention of dynamizing the activity. This new policy has multiple objectives: to reduce outages of strategic circuits as much as possible to improve network performance, develop and maintain the professionalism of employees and promote innovations to push back technical boundaries. This policy is based on 4 strategies: a strong commitment by management at all levels of the company, continuous improvement of LW methods and tools in order to take account of lessons learned from working sites, creating innovative work sites and seeking to improve knowledge of physical phenomena and promoting technical advances. After three years' implementation, the result is very positive and confirms RTE's strategic directions in the field of Live Working.","PeriodicalId":238060,"journal":{"name":"2014 11th International Conference on Live Maintenance (ICOLIM)","volume":"175 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114132343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of ageing ACSR conductors and LineVue™ inspection device","authors":"C. Pon","doi":"10.1109/ICOLIM.2014.6934360","DOIUrl":"https://doi.org/10.1109/ICOLIM.2014.6934360","url":null,"abstract":"Presents a collection of slides covering the following topics: degradation due to corrosion; laboratory assessment and testing of conductors (including visual examination [extent and severity]; and field inspection using LineVue™.","PeriodicalId":238060,"journal":{"name":"2014 11th International Conference on Live Maintenance (ICOLIM)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114261085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bird protector-related issues on medium voltage overhead networks","authors":"G. Gõcsei, B. Németh, R. Cselkó, I. Berta","doi":"10.1109/ICOLIM.2014.6934383","DOIUrl":"https://doi.org/10.1109/ICOLIM.2014.6934383","url":null,"abstract":"In the last few years bird protection became a more and more important aspect on medium voltage overhead lines. Injuries of birds related to electrocution endanger both the health of the different species and the reliability of the grid as well. International standards and national regulations based on the opinion of different associations for wildlife protection are often been accepted without any detailed inspection of equipment to be installed on the network. There are many types of insulators, cross-arms and poles even in a specific section of a medium voltage power line. The same type of rigid bird protector installed on them can easily increase the risk of failures caused by the wrong way of application or installation. A rigid bird protector - especially in case of rainy weather conditions or fog - acts as a floating object near the phase conductors. This electrode distorts the electric field distribution even in case of normal operational conditions and increase the risk of flashovers on the surface of the insulators caused by an overvoltage wave in the conductors. Use of conductor and insulator covers are also questionable from the aspect of live-line maintenance (LLM): inspection of working site became impossible and electrical and mechanical condition cannot been estimated at all. Operations with the hot stick method - which is a widely used LLM technique for example in Hungary - became especially difficult. Inspection of different bird protective equipment from electrical aspect is a very important question to keep the operation of medium voltage grids as reliable as possible. In the High Voltage Laboratory of Budapest University of Technology and Economics calculations, finite element simulations of electric field and potential on complex 3D CAD models and a set of measurements have been executed to inspect the exact effects of these equipment from the aspect of the reliability of the grid. Experimental studies in Hungary show that many failures are related to rigid bird protectors. There are often detectable marks on the surface of both the phase conductors and insulators. There are many bird protector-related switch-offs on the territory of different Hungarian DSOs, so the clarification of unexplained questions about this practical topic is urgent and become more and more important.","PeriodicalId":238060,"journal":{"name":"2014 11th International Conference on Live Maintenance (ICOLIM)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114589222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PPE - Arc-fault-tested protective clothing with increased protective effect","authors":"Tobias Kerschensteiner","doi":"10.1109/ICOLIM.2014.6934364","DOIUrl":"https://doi.org/10.1109/ICOLIM.2014.6934364","url":null,"abstract":"Section 8.3 “Calculation of expected and equivalent arc energy for selecting box test protection class” of the “Guideline for the selection of personal protective equipment when exposed to the thermal effects of an electric fault arc” published by the ISSA (International Social Security Association) describes applications where class 1 or 2 PPE is not sufficient. To allow work in such cases, either; Protective devices which ensures defined and sufficiently quick disconnection must be used or; A sufficient minimum distance must be maintained or; PPE tested for higher incident energies must be used. This article presents applications where tested PPE for thermal incident energies exceeding class 2 achieves the required arc protection level at the work location in line with the above mentioned guideline. In addition to selection aids, test procedures and test results of PPE for increased thermal incident energies exceeding class 2 are described.","PeriodicalId":238060,"journal":{"name":"2014 11th International Conference on Live Maintenance (ICOLIM)","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115758900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}