2000 IEEE Industrial and Commercial Power Systems Technical Conference. Conference Record (Cat. No.00CH37053)最新文献_第2页

Arcing-fault models for low-voltage power systems 低压电力系统电弧故障模型

2000 IEEE Industrial and Commercial Power Systems Technical Conference. Conference Record (Cat. No.00CH37053) Pub Date : 2000-05-07 DOI: 10.1109/ICPS.2000.854363

T. Gammon, J. Matthews

{"title":"Arcing-fault models for low-voltage power systems","authors":"T. Gammon, J. Matthews","doi":"10.1109/ICPS.2000.854363","DOIUrl":"https://doi.org/10.1109/ICPS.2000.854363","url":null,"abstract":"An arcing fault is a dangerous form of short circuit that may have a low current magnitude. In the case of such faults, the magnitude of the current is limited by the resistance of the arc and may also be limited by the impedance of a ground path. This lower level fault current is often insufficient to immediately trip overcurrent devices, resulting in the escalation of the arcing fault, increased system damage, tremendous release of energy, and threat to human life. Despite modern advances in system protection, people are critically injured or killed each year when they are in the vicinity of an arcing fault that is either accidentally physically initiated or initiated through a glow-to-arc transition. The initial phase of an ongoing arcing-fault research project was to review the pioneering work, dating back to the 1920s. The historical evolution of arc modeling for low-voltage systems and a summary of the electrical aspects and the physics involved in arcing faults were reviewed in a companion paper (1999). After a comprehensive literature search was completed, today's better analytical tools facilitated the development of new arc models with current-dependent arc voltages. A current-dependent arc voltage better represents the arcing phenomenon than the assumed arc voltage associated with previous instantaneous arc models.","PeriodicalId":273686,"journal":{"name":"2000 IEEE Industrial and Commercial Power Systems Technical Conference. Conference Record (Cat. No.00CH37053)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115919370","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: 30

Power quality considerations for CNC machines: grounding 数控机床的电能质量注意事项:接地

2000 IEEE Industrial and Commercial Power Systems Technical Conference. Conference Record (Cat. No.00CH37053) Pub Date : 2000-05-07 DOI: 10.1109/ICPS.2000.854351

A. Morinec

{"title":"Power quality considerations for CNC machines: grounding","authors":"A. Morinec","doi":"10.1109/ICPS.2000.854351","DOIUrl":"https://doi.org/10.1109/ICPS.2000.854351","url":null,"abstract":"Computer numerical control (CNC) machines are used to shape metal parts by milling, boring, cutting, drilling and grinding. A CNC machine generally consists of a computer-controlled servo-amplifier, servo-motors, spindle motor and various tooling. The machine can be programmed to shape a part by use of a front control panel. More sophisticated models allow a CAD drawing to be uploaded to the machine. The electronic components within a CNC machine are particularly sensitive to the grounding techniques used in the electrical supply to the machine. Malfunction, degradation and damage to the electronics can often be traced to problems with the grounding system. Production downtime, product loss and expensive repair bills result. With the widespread use of CNC machines across the world, these problems have become a significant financial concern to many CNC machine users and their electric utility companies. This paper begins with a brief explanation of the fundamentals of service and equipment grounding. The basic design of CNC machines is also explained. Based on a survey of several CNC machine representatives, the paper explores the common grounding techniques recommended by many CNC machine tool builders with particular emphasis on the ground rod problem. In addition, several actual case studies that support the ground rod problem will be described. Finally, a recommended powering and grounding practice is presented to help eliminate power quality related operating problems with CNC machines while maintaining the safety requirements of electrical codes.","PeriodicalId":273686,"journal":{"name":"2000 IEEE Industrial and Commercial Power Systems Technical Conference. Conference Record (Cat. No.00CH37053)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122501327","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: 10

Wheeling charge under a deregulated environment 在放松管制的环境下操纵收费

2000 IEEE Industrial and Commercial Power Systems Technical Conference. Conference Record (Cat. No.00CH37053) Pub Date : 2000-05-07 DOI: 10.1109/ICPS.2000.854367

W. Lee, C. Lin, L. D. Swift

{"title":"Wheeling charge under a deregulated environment","authors":"W. Lee, C. Lin, L. D. Swift","doi":"10.1109/ICPS.2000.854367","DOIUrl":"https://doi.org/10.1109/ICPS.2000.854367","url":null,"abstract":"Today's electric power industry is undergoing many fundamental changes due to the process of deregulation. Traditionally, electric power systems in many countries were structured in a single vertically integrated company for providing electric power to their customers based on cost-of-service. However, a number of countries have implemented or are implementing a free market deregulated industry in recent years. It is strongly believed that deregulation will have profound and important implications on technology within the electric power industry and the operation of industrial systems. Therefore, industrial sectors need to re-evaluate potential impacts and strategies of operation under a deregulated environment. One of the most exciting opportunities for the customer is the implementation of wholesale and retail wheeling. With this change, customers will have the option to purchase services and energy from different sources. However, before exercise this right, one has to understand the possible costs and risks associate with this right. From the economic point of view, lower energy cost does not necessarily mean lower utility cost. The cost of wheeling charges and other factors have to be figured into the calculation. Since it is impossible to color the electron, there is no standard formula to calculate wheeling charges within the utility industry. This paper discusses several commonly used wheeling calculation methods used by utility companies. A numerical example is provided to illustrate the Vector Absolute Mega-Watt Mile (VAMM) method that is used by the Electric Reliability Council of Texas (ERCOT).","PeriodicalId":273686,"journal":{"name":"2000 IEEE Industrial and Commercial Power Systems Technical Conference. Conference Record (Cat. No.00CH37053)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129739473","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: 42

Current transformer application with digital ground differential protection relays 带数字式接地差动保护继电器的电流互感器应用

2000 IEEE Industrial and Commercial Power Systems Technical Conference. Conference Record (Cat. No.00CH37053) Pub Date : 2000-05-07 DOI: 10.1109/ICPS.2000.854360

P. Sutherland

引用次数: 0

Power quality protection using a platform-mounted SCD-demonstration project experience 使用平台式scd的电能质量保护示范项目经验

2000 IEEE Industrial and Commercial Power Systems Technical Conference. Conference Record (Cat. No.00CH37053) Pub Date : 2000-05-07 DOI: 10.1109/ICPS.2000.854365

M.K. Peel, A. Sundaram, N. Woodley

引用次数: 5

Prevention of underground cable splice failures 防止地下电缆接头故障

2000 IEEE Industrial and Commercial Power Systems Technical Conference. Conference Record (Cat. No.00CH37053) Pub Date : 2000-05-07 DOI: 10.1109/ICPS.2000.854359

N. Stringer, L. Kojovic

引用次数: 25

Deregulated transmission system reliability planning criteria based on historical equipment performance data 基于历史设备性能数据的无管制输电系统可靠性规划准则

2000 IEEE Industrial and Commercial Power Systems Technical Conference. Conference Record (Cat. No.00CH37053) Pub Date : 2000-05-07 DOI: 10.1109/ICPS.2000.854355

A. Chowdhury, D. Koval

{"title":"Deregulated transmission system reliability planning criteria based on historical equipment performance data","authors":"A. Chowdhury, D. Koval","doi":"10.1109/ICPS.2000.854355","DOIUrl":"https://doi.org/10.1109/ICPS.2000.854355","url":null,"abstract":"In the past, electric utilities were continuously adding more facilities to their systems in order to satisfy the growing customer energy requirements. A utility industry traditionally has relied on a set of deterministic criteria to guide transmission planning. The traditional planning guidelines were based on planner's experience and intuition without a formal and consistent framework for their development. This paper identifies some of the limitations of traditional utility transmission system planning criteria and the possible implications for industrial and commercial customers. The primary objective of probabilistic planning criteria and techniques presented in this paper as opposed to the rules of thumb based planning criteria is to guide transmission system planners in balancing system cost and reliability performance. Contingency ranking has been used as a method of rationalizing system reliability enhancement projects with value-based concepts. This paper presents Alberta Power Limited's (APL) criteria review and development of system reliability planning criteria based on contingency ranking and 12 years of historical equipment performance data.","PeriodicalId":273686,"journal":{"name":"2000 IEEE Industrial and Commercial Power Systems Technical Conference. Conference Record (Cat. No.00CH37053)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115606859","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: 19

Effects of adverse weather and aging on power system reliability 恶劣天气和老化对电力系统可靠性的影响

2000 IEEE Industrial and Commercial Power Systems Technical Conference. Conference Record (Cat. No.00CH37053) Pub Date : 2000-05-07 DOI: 10.1109/ICPS.2000.854356

M. Bollen

引用次数: 54

Changes to NFPA 70E for year 2000 2000年NFPA 70E的变化

2000 IEEE Industrial and Commercial Power Systems Technical Conference. Conference Record (Cat. No.00CH37053) Pub Date : 2000-05-07 DOI: 10.1109/ICPS.2000.854362

J. Andrews, R.A. Jones, L. Mcclung

{"title":"Changes to NFPA 70E for year 2000","authors":"J. Andrews, R.A. Jones, L. Mcclung","doi":"10.1109/ICPS.2000.854362","DOIUrl":"https://doi.org/10.1109/ICPS.2000.854362","url":null,"abstract":"The National Fire Protection Association (NFPA), at the Fall 1999 General Meeting approved changes to their Standard Number 70E, entitled \"Electrical Safety Requirements for Employee Workplaces\". These changes resulted from public proposals and comments based on new technology and developments, substantiated by testing, in the area of electrical safety. The recommendations were reviewed and approved by the NFPA 70E Committee during actions on the proposals and comments over the past two years. Significant changes were made to the Standard. Text was updated to conform to the 1999 National Electrical Code. All definitions were placed in one section under Introduction. All training requirements and qualifications were placed in one chapter. Additional methods were provided for identifying the level of electrical arc flash hazard, determining safe approach distances, and selecting personal protective equipment appropriate for the degree of hazard and incident energy available at the work place. A new Part IV was added to provide guidance for safe work practices around specialized electrical equipment such as electrolytic cells, batteries, lasers, and power electronic equipment.","PeriodicalId":273686,"journal":{"name":"2000 IEEE Industrial and Commercial Power Systems Technical Conference. Conference Record (Cat. No.00CH37053)","volume":" 43","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120832447","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

Arcing fault current and the criteria for setting ground fault relays in solidly-grounded low voltage systems 实接地低压系统电弧故障电流及接地故障继电器设置准则

2000 IEEE Industrial and Commercial Power Systems Technical Conference. Conference Record (Cat. No.00CH37053) Pub Date : 2000-05-07 DOI: 10.1109/ICPS.2000.854370

K. Malmedal, P. K. Sen

引用次数: 16