发布求助
文献互助 智能选刊 最新文献

2016 Down to Earth Conference (DTEC)最新文献

筛选
英文 中文
Power system earthing – its commissioning and test errors 电力系统接地。调试和试验误差
2016 Down to Earth Conference (DTEC) Pub Date : 2016-09-01 DOI: 10.1109/DTEC.2016.7731285
H. Dehbonei, Anthony Kracyla
{"title":"Power system earthing – its commissioning and test errors","authors":"H. Dehbonei, Anthony Kracyla","doi":"10.1109/DTEC.2016.7731285","DOIUrl":"https://doi.org/10.1109/DTEC.2016.7731285","url":null,"abstract":"This paper is a case study of an earthing system commissioning test, the associated errors and how to compensate for them. When measuring the impedance of an earth grid it is important to realise that there are many factors that can influence the test results. Inductive coupling between the current lead and remote earth lead and not being at remote soil potential are such factors that must be considered when determining the earth grid impedance. Often, errors due to inductive and conductive coupling are unavoidable because of the layout of the test circuit and the size of the earthing system or existence of MEN, transmission or distribution power lines, etc. For this reason, computer modelling is essential to correct interactions between the test circuit and earth grid under test, and interactions within the test circuit itself.","PeriodicalId":417330,"journal":{"name":"2016 Down to Earth Conference (DTEC)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131633831","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}
引用次数: 1
A network asset based probabilistic model of ground potential rise and touch voltage hazard profiles at MV substations 基于网络资产的中压变电所地电位上升和接触电压危险分布概率模型
2016 Down to Earth Conference (DTEC) Pub Date : 2016-09-01 DOI: 10.1109/DTEC.2016.7731278
Matthew B. Bastian, W. Carman, D. Woodhouse
{"title":"A network asset based probabilistic model of ground potential rise and touch voltage hazard profiles at MV substations","authors":"Matthew B. Bastian, W. Carman, D. Woodhouse","doi":"10.1109/DTEC.2016.7731278","DOIUrl":"https://doi.org/10.1109/DTEC.2016.7731278","url":null,"abstract":"A probabilistic model for predicting the expected touch voltage hazard profiles at HV/MV substations is presented. The model uses readily available asset information to analyse the MV network fed from the HV/MV substation. Probabilistic profiling of the expected magnitude, frequency and duration of typical ground faults on a given distribution network, provides quantitative information for use in determining the actual risk profile for the assets. This in turn helps asset owners demonstrate that they meet their duty of care in relation to ground fault related hazards. The model is applied to two example substations, generating a probabilistic profile for ground fault current, ground potential rise and the expected hazard ratio of expected touch voltages in relation to IEEE80 safety criteria across the range of simulated faults. The model output profiles for each HV/MV substation are then compared against profiles derived from seven years of recorded ground potential rise events during real ground faults.","PeriodicalId":417330,"journal":{"name":"2016 Down to Earth Conference (DTEC)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129643088","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}
引用次数: 2
The motivators and practicalities of a change from isolated distribution earthing systems 从孤立配电接地系统转变的动机和实用性
2016 Down to Earth Conference (DTEC) Pub Date : 2016-09-01 DOI: 10.1109/DTEC.2016.7731299
P. Sébire, S. Palmer, B. Suthar
{"title":"The motivators and practicalities of a change from isolated distribution earthing systems","authors":"P. Sébire, S. Palmer, B. Suthar","doi":"10.1109/DTEC.2016.7731299","DOIUrl":"https://doi.org/10.1109/DTEC.2016.7731299","url":null,"abstract":"The effective management of earthing systems associated with distribution networks supplying metropolitan areas is often restricted by constraints imposed by rigid policies. These policies are often established using rule of thumb earthing practices due to an absence of tools capable of assessing distribution earthing designs for individual assets. Policies based on rule of thumb targets are selected by addressing the problems associated with the dominant installation type. This means that those installations in the minority can represent significant risk to asset owners, even though they comply with standard construction practices. Installations within metropolitan areas, due to the greater diversity in surrounding infrastructure and use, can change the risk profile of the installation, making the implementation of the rigid risk management policies unfeasible. For ActewAGL, a change in the distribution earthing system paradigm to include common bonded earthing, is seen as a solution to a number of problems within the existing distribution system. This paper considers the motivators and the practicalities of the changes required in the context of a largely unique network; where the administration of an isolated system by one authority has resulted in a predominately separately earthed distribution system throughout.","PeriodicalId":417330,"journal":{"name":"2016 Down to Earth Conference (DTEC)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132879408","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}
引用次数: 0
Safety, security and theft issues 安全，保安和盗窃问题
2016 Down to Earth Conference (DTEC) Pub Date : 2016-09-01 DOI: 10.1109/DTEC.2016.7731294
James A. Hickey, W. Carman
{"title":"Safety, security and theft issues","authors":"James A. Hickey, W. Carman","doi":"10.1109/DTEC.2016.7731294","DOIUrl":"https://doi.org/10.1109/DTEC.2016.7731294","url":null,"abstract":"This paper discusses copper theft deterrent measures both within substations and on publicly accessible structures. A recently developed alternative for sub-transmission timber pole earthing is proving to be an effective method in reducing the incidents of theft of down earth conductors. This theft deterrent method utilizes copper bonded steel rods or copper sheathed steel rods in the down conductor, the same steel rod material used for driven earth electrodes. These copper bonded steel rods are constructed from hardened steel to withstand the forces from being driven directly into virgin soils without burring the rod tips or bending the rod. Being hardened steel they have little or no scrap value and can't be cut using the common hand tools that thieves use such as pliers, cable cutters or even axes.","PeriodicalId":417330,"journal":{"name":"2016 Down to Earth Conference (DTEC)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132302784","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}
引用次数: 0
Modelling zone-substation-secondary earth fault scenarios with application to compliance with probabilistic safety criteria methods 区-变电所-二次接地故障情景的建模及其在符合概率安全准则方法中的应用
2016 Down to Earth Conference (DTEC) Pub Date : 2016-09-01 DOI: 10.1109/DTEC.2016.7731302
W. Tocher, S. Palmer, D. Woodhouse
{"title":"Modelling zone-substation-secondary earth fault scenarios with application to compliance with probabilistic safety criteria methods","authors":"W. Tocher, S. Palmer, D. Woodhouse","doi":"10.1109/DTEC.2016.7731302","DOIUrl":"https://doi.org/10.1109/DTEC.2016.7731302","url":null,"abstract":"Since the publication of the earthing guideline, ENA EG-0, the electrical industry response has been a mix of enthusiasm, resistance and compulsion to accept and implement the safety criteria methods proposed. In the large part it has been acknowledged as a positive improvement as the most thorough and modern treatment of earthing system risk analysis. While the risk based safety methods proposed in EG-0 appear functional with regard the assessment of substation primary faults, there is little doubt that assessment of Zone-Substation-Secondary risks appear higher than previously thought, particularly when compared to traditional methods. This paper proposes a method of modelling and evaluating a zone substation distribution network in order to better calculate the earthing risk zone substation assets create for individuals living within the influence of the installations. Moreover, the methods proposed give light to a possible solution to the conundrum surrounding any earthing system risk analysis where multiple fault scenarios exist.","PeriodicalId":417330,"journal":{"name":"2016 Down to Earth Conference (DTEC)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129534957","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}
引用次数: 0
Relationship between pipeline source impedance and touch voltage hazards induced by power lines 管线源阻抗与电源线接触电压危害的关系
2016 Down to Earth Conference (DTEC) Pub Date : 2016-09-01 DOI: 10.1109/DTEC.2016.7731297
B. Pawlik, M. Bale, D. Woodhouse
{"title":"Relationship between pipeline source impedance and touch voltage hazards induced by power lines","authors":"B. Pawlik, M. Bale, D. Woodhouse","doi":"10.1109/DTEC.2016.7731297","DOIUrl":"https://doi.org/10.1109/DTEC.2016.7731297","url":null,"abstract":"Touch voltage rather than prospective touch voltage is a critical measure in assessing earthing safety particularly for third party assets such as pipelines. The touch (or `loaded') voltage is an expression of the actual hazard across a subject. It is a significant leveller because it is a consistent measure of hazard irrespective of soil resistivity, existence of surface impedances and other series impedances. A key component of the touch voltage circuit, and one largely ignored or misunderstood by the inexperienced, is the source impedance of a prospective touch voltage, which is discussed in detail herein. This paper analyses the importance of the touch voltage for electrical hazards on insulated metallic pipelines. It paves the way for further research in consideration of the change from Dalziel's fixed body resistance to Biegelmeier's voltage dependent body resistance distribution. It has important implications for design and safety verification of pipe earthing systems.","PeriodicalId":417330,"journal":{"name":"2016 Down to Earth Conference (DTEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129618302","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}
引用次数: 0
The probability of ventricular fibrillation due to step voltage hazards 阶跃电压危险引起心室颤动的可能性
2016 Down to Earth Conference (DTEC) Pub Date : 2016-09-01 DOI: 10.1109/DTEC.2016.7731305
D. Woodhouse, I. Griffiths
{"title":"The probability of ventricular fibrillation due to step voltage hazards","authors":"D. Woodhouse, I. Griffiths","doi":"10.1109/DTEC.2016.7731305","DOIUrl":"https://doi.org/10.1109/DTEC.2016.7731305","url":null,"abstract":"In this paper the authors build on the findings of previous works to explore the risk due to step voltage hazards. Of particular interest is a correction to work published by Wang. The outcome is significant as it appears to indicate that the Wang result was significantly conservative and the corrected results are somewhat confronting. The same calculation framework is used to derive step voltage time curves which represent a constant probability of ventricular fibrillation and can be used as a component of the risk level assessment. Again the results were found to be confronting, motivating the authors to explore other physiological effects outside of ventricular fibrillation for establishing appropriate levels of risk for step voltages. The outcome of that work has produced a novel recommendation for a establishing step voltage safety criteria and an insight into further research which will further clarify the risk posed by step voltages.","PeriodicalId":417330,"journal":{"name":"2016 Down to Earth Conference (DTEC)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117154393","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}
引用次数: 0
Methodology and implementation of leader inception theory for lightning protection of substations 变电站防雷先导起始理论的方法学与实施
2016 Down to Earth Conference (DTEC) Pub Date : 2016-09-01 DOI: 10.1109/DTEC.2016.7731283
F. D'alessandro, Sabrina Sequeira
{"title":"Methodology and implementation of leader inception theory for lightning protection of substations","authors":"F. D'alessandro, Sabrina Sequeira","doi":"10.1109/DTEC.2016.7731283","DOIUrl":"https://doi.org/10.1109/DTEC.2016.7731283","url":null,"abstract":"Traditional methods for shielding substations against direct lightning strokes were first published in IEEE Std. 998 in 1996. Several new methods were added to the ensuing 2012 edition. This paper provides an exposition of the key principles and practical implementation of one of those methods, viz. the “leader inception theory”. A novel software implementation of the method is described and the output is illustrated with a case study. Since the efficient interception of lightning involves not only the method used to position protective air terminals but also the characteristics of the air terminals themselves, the paper addresses the importance of space charge and the necessity for minimizing corona discharges during the pre-stroke phase of a thunderstorm. The results of corona discharge measurements made on sharp and blunt air terminals at a state-of-the-art HV facility are presented and discussed.","PeriodicalId":417330,"journal":{"name":"2016 Down to Earth Conference (DTEC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125563164","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}
引用次数: 1
Innovations in station ground testing 车站地面测试的创新
2016 Down to Earth Conference (DTEC) Pub Date : 2016-09-01 DOI: 10.1109/DTEC.2016.7731288
E. Dick, B. Jamali
{"title":"Innovations in station ground testing","authors":"E. Dick, B. Jamali","doi":"10.1109/DTEC.2016.7731288","DOIUrl":"https://doi.org/10.1109/DTEC.2016.7731288","url":null,"abstract":"A sample box and ac resistance meter find contamination in surface stone. Commercial dc resistance meters verify grid integrity but have short leads and experience ac interference. A custom built micro ohmmeter addresses these deficiencies. Wenner, Schlumberger and Palmer resistivity tests differ in their ability to resolve a highly resistive deep soil layer. The classic Fall of Potential impedance test will not work at sites with external connections, leading to a new Proximity Correction method. A rational polynomial models mutual resistance in multilayer soil, which is much more efficient than image methods in grounding analysis.","PeriodicalId":417330,"journal":{"name":"2016 Down to Earth Conference (DTEC)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115567559","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}
引用次数: 0
Touch voltage is not enough - meeting our duty of care 接触电压不够，不能满足我们的注意义务
2016 Down to Earth Conference (DTEC) Pub Date : 2016-09-01 DOI: 10.1109/DTEC.2016.7731281
W. Carman
{"title":"Touch voltage is not enough - meeting our duty of care","authors":"W. Carman","doi":"10.1109/DTEC.2016.7731281","DOIUrl":"https://doi.org/10.1109/DTEC.2016.7731281","url":null,"abstract":"The vast majority of engineering design decisions are multivariate, and earthing system design is no exception to the rule. Safety targets are but one dimension, supported beneath by layers of decisions. Additionally many other critical decisions are to be made before an installation may be signed off as being `fit for purpose'. Designers, constructors and asset owners or principles (utilities, plant/mine owners) all share a duty of care that is not met by simply stating that `all precautions should be taken'. This paper examines the various decisions and the implications on the ability to maintain an effective safety critical system. A so-called deterministic design is always a probabilistic design simply by virtue of the inherent nature of the system and process. Significant decisions are made both consciously or unconsciously in any earthing system implementation. Even if not consciously evaluating the probability functions they exist nonetheless and each decision made (or assumed or ignored) will incorporate a probabilistic element. What level of understanding of the values and interdependencies between the various parameters and functions does a designer need to ensure the final result meets and continues to meet their duty of care?","PeriodicalId":417330,"journal":{"name":"2016 Down to Earth Conference (DTEC)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122537511","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}
引用次数: 1
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信