2014 67th Annual Conference for Protective Relay Engineers最新文献_第4页

False Applications of Reliable Relaying Principles revisited 重新审视可靠继电原理的错误应用

2014 67th Annual Conference for Protective Relay Engineers Pub Date : 2014-04-24 DOI: 10.1109/CPRE.2014.6799012

R. Hedding

引用次数: 1

NERC requirements for setting load-dependent power plant protection: PRC-025-1 NERC对设置负荷相关电厂保护的要求:PRC-025-1

2014 67th Annual Conference for Protective Relay Engineers Pub Date : 2014-04-24 DOI: 10.1109/CPRE.2014.6799020

C. Mozina

引用次数: 1

How to determine the effectiveness of generator differential protection 如何判断发电机差动保护的有效性

2014 67th Annual Conference for Protective Relay Engineers Pub Date : 2014-04-24 DOI: 10.1109/CPRE.2014.6799018

N. Fischer, D. Finney, Douglas I. Taylor

{"title":"How to determine the effectiveness of generator differential protection","authors":"N. Fischer, D. Finney, Douglas I. Taylor","doi":"10.1109/CPRE.2014.6799018","DOIUrl":"https://doi.org/10.1109/CPRE.2014.6799018","url":null,"abstract":"Differential protection is often touted as being The protection for generator stator windings. In this paper, we examine the degree of protection afforded by the various types of differential elements (phase, negative, and zero sequence) for stator winding faults. To understand why and how windings fail, we need to know how a stator is constructed, how the winding coils are made, and how they are mounted into the stator core. This paper examines various types of winding configurations and the makeup of the winding insulation. We analyze how different winding failures can be detected using the various differential elements mentioned. Because protection elements are not only required to be sensitive but also secure, we contrast the dependability and security of each element. Security of any differential element must include the performance of the primary current transformers (CTs); therefore, we extend the discussion to setting recommendations and CT selection rules. Finally, the paper answers the question, How much protection does each type of differential element provide? Knowing the limits to performance will allow protection engineers to set the elements for realistic sensitivity without unnecessarily risking any security.","PeriodicalId":285252,"journal":{"name":"2014 67th Annual Conference for Protective Relay Engineers","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125239367","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: 11

Protecting mutually coupled transmission lines: Challenges and solutions 保护相互耦合的传输线:挑战和解决方案

2014 67th Annual Conference for Protective Relay Engineers Pub Date : 2014-04-24 DOI: 10.1109/CPRE.2014.6798993

D. Tziouvaras, H. Altuve, F. Calero

{"title":"Protecting mutually coupled transmission lines: Challenges and solutions","authors":"D. Tziouvaras, H. Altuve, F. Calero","doi":"10.1109/CPRE.2014.6798993","DOIUrl":"https://doi.org/10.1109/CPRE.2014.6798993","url":null,"abstract":"This paper is a tutorial on the protection of mutually coupled transmission lines. It discusses how mutual coupling affects the polarizing quantities of ground directional elements, the reach of ground distance elements, and the accuracy of single-ended fault locating algorithms. The paper provides settings guidelines for instantaneous directional overcurrent and ground distance elements. It discusses in detail how transmission line mutual coupling causes overreaching or underreaching of ground distance elements. It also discusses the impact on these elements of grounding the mutually coupled line at both line ends during maintenance. The paper analyzes whether mutual coupling compensation offers any benefits to line protection. The ease and benefit of line current differential schemes are contrasted in the discussion. Lastly, the paper examines a case when a double-circuit transmission line is operated as a single circuit with jumpers placed across similar phases along the line. This situation typically arises when the utility company needs to free one of the bays to bring an additional line into the substation. The protection engineer needs to decide where to install jumpers to parallel the two circuits in order to avoid distance element underreaching. The paper provides an analysis of this problem and offers suggestions on how to address it.","PeriodicalId":285252,"journal":{"name":"2014 67th Annual Conference for Protective Relay Engineers","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126926089","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: 37

Considerations for the implementation of test access points a best practice guide 实现测试访问点的注意事项是最佳实践指南

2014 67th Annual Conference for Protective Relay Engineers Pub Date : 2014-04-24 DOI: 10.1109/CPRE.2014.6799041

Tobias Planert, Benno Hornischer, J. Jenkner, R. Eick, Antoni Furlani Rosa

引用次数: 0

Preventing transformer mis-operations for external faults 防止变压器因外部故障而误操作

2014 67th Annual Conference for Protective Relay Engineers Pub Date : 2014-04-24 DOI: 10.1109/CPRE.2014.6799011

R. Aguilar, Joe Perez

引用次数: 1

Case study: Using distribution automation to build the next generation utility in the City of Wadsworth 案例研究:使用配电自动化在沃兹沃斯市建立下一代公用事业

2014 67th Annual Conference for Protective Relay Engineers Pub Date : 2014-04-24 DOI: 10.1109/CPRE.2014.6799004

M. Feller, Bryan Fazzari, Robert Van Singel, William C. Edwards

{"title":"Case study: Using distribution automation to build the next generation utility in the City of Wadsworth","authors":"M. Feller, Bryan Fazzari, Robert Van Singel, William C. Edwards","doi":"10.1109/CPRE.2014.6799004","DOIUrl":"https://doi.org/10.1109/CPRE.2014.6799004","url":null,"abstract":"The City of Wadsworth, Ohio, is upgrading and adding new capabilities to its protection and control (P&C) system. A cohesive set of ground-breaking new technologies is being deployed, leveraging an existing fiber-optic communications network. The integration of modern recloser controls, capacitors, regulators, and feeder circuits with a centralized automated fault detection, isolation, and restoration system is the focus of the new P&C system. In addition, the new P&C design provides a solution to a present challenge: engineering a centralized automated feeder voltage profile optimization solution that can remain fully functional alongside a fault detection and isolation system that is capable of automatically modifying the distribution system topology. The problem with many existing automated voltage profile optimization solutions is that they may need to be disabled when a distribution feeder is not in its normal configuration. These two technologies are being integrated into a single interdependent solution that provides the city with a volt/VAR control system that can automatically and appropriately adapt to constantly changing distribution system topology as faults, loss of potential, miscoordinations, or overloads occur and are automatically and immediately mitigated.","PeriodicalId":285252,"journal":{"name":"2014 67th Annual Conference for Protective Relay Engineers","volume":"254 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116880561","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

GSU transformer - Current transformer connections and differential relay applications GSU变压器。电流互感器连接和差动继电器应用

2014 67th Annual Conference for Protective Relay Engineers Pub Date : 2014-04-24 DOI: 10.1109/CPRE.2014.6799016

D. J. Hansen

引用次数: 0

Considerations for sending a breaker trip command over great distances for the purpose of arc flash mitigation 远距离发送断路器跳闸指令以减少电弧闪光的考虑

2014 67th Annual Conference for Protective Relay Engineers Pub Date : 2014-04-24 DOI: 10.1109/CPRE.2014.6799009

M. Proctor

{"title":"Considerations for sending a breaker trip command over great distances for the purpose of arc flash mitigation","authors":"M. Proctor","doi":"10.1109/CPRE.2014.6799009","DOIUrl":"https://doi.org/10.1109/CPRE.2014.6799009","url":null,"abstract":"When analyzing arc flash hazards in an electrical distribution system, it is not uncommon for equipment with high incident energy levels to be a great distance from the immediate upstream interrupting device. Adding more complexity to the problem is the fact that the immediate upstream interrupting device is at a higher voltage level, so the upstream protective device senses a small fraction of the actual arcing fault current. In some cases, this means that the arcing fault must be detected by a device at the low voltage equipment, and a trip signal must be sent several thousand feet to the upstream breaker. This paper analyzes the advantages and disadvantages of different media which can be used to transmit this transfer trip signal. The reader is advised of different methods of alarming to alert operations personnel that the protection scheme is not operational, either due to communications channel or protective device failure. Different design architecture concepts are explored to advise how to achieve maximum reliability, and different failure scenarios are examined to show how increased message delays for certain failures can dramatically increase incident energies.","PeriodicalId":285252,"journal":{"name":"2014 67th Annual Conference for Protective Relay Engineers","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123661577","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

Proving viability of line current differential over packet switched networks 证明线路电流差分在分组交换网络上的可行性

2014 67th Annual Conference for Protective Relay Engineers Pub Date : 2014-04-24 DOI: 10.1109/CPRE.2014.6799026

Silvio Roesler, Ruben Lobo

引用次数: 5