2007 60th Annual Conference for Protective Relay Engineers最新文献

Application of Existing Technologies to Reduce Arc-Flash Hazards 现有技术的应用，以减少弧闪危害

2007 60th Annual Conference for Protective Relay Engineers Pub Date : 2007-06-24 DOI: 10.1109/PAPCON.2007.4286297

J. Buff, K. Zimmerman

引用次数: 1

Application of Modern Relays to Dual-Breaker Line Terminals 现代继电器在双断路器接线端子中的应用

2007 60th Annual Conference for Protective Relay Engineers Pub Date : 2007-03-27 DOI: 10.1109/CPRE.2007.359890

B. Kasztenny, I. Voloh

引用次数: 1

Fundamentals of Adaptive Protection of Large Capacitor Banks - Accurate Methods for Canceling Inherent Bank Unbalances 大电容器组自适应保护的基本原理——消除固有电容器组不平衡的精确方法

2007 60th Annual Conference for Protective Relay Engineers Pub Date : 2007-03-27 DOI: 10.1109/CPRE.2007.359897

B. Kasztenny, J. Schaefer, E. Clark

引用次数: 19

Protection and Control Redundancy Considerations in Medium Voltage Distribution Systems 中压配电系统中保护和控制冗余的考虑

2007 60th Annual Conference for Protective Relay Engineers Pub Date : 2007-03-27 DOI: 10.1109/CPRE.2007.359914

B. Kasztenny, R. Hunt, M. Vaziri

{"title":"Protection and Control Redundancy Considerations in Medium Voltage Distribution Systems","authors":"B. Kasztenny, R. Hunt, M. Vaziri","doi":"10.1109/CPRE.2007.359914","DOIUrl":"https://doi.org/10.1109/CPRE.2007.359914","url":null,"abstract":"This paper is intended to raise some discussions on selected aspects of protection and control redundancy in distribution systems. The paper will present general considerations, common definitions, and redundancy methods in distribution systems across various utility and industrial installations in North America. Review of the redundancy practices and their economical and philosophical backgrounds in distribution systems will help understanding of the main objectives. The paper will also outline in detail advantages and disadvantages of redundancy considerations such as separate DC power supplies, dual trip coils, separate trip circuitry, main/backup (or SET A/SET B) protection concepts, redundant feeder controls, alarms and indications, and finally redundant communication channels. This paper will present a case study for typically used redundant schemes and demonstrates some common implementation errors, pseudo redundancy, and illustrations of two relays providing inadequate redundancy. Lastly, the paper will elaborate on some of the redundancy issues and their solutions based on new generation microprocessor relays, such as multiple setting groups, automatic reclosing and breaker failure protection cross-initiation, oscillography cross-triggering, etc. The intention of this paper is to initiate an industry-wide discussion and idea sharing on the subject of redundancy and implementations in the utility and industrial applications","PeriodicalId":438320,"journal":{"name":"2007 60th Annual Conference for Protective Relay Engineers","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131619888","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: 7

Undervoltage Load Shedding 欠压减载

2007 60th Annual Conference for Protective Relay Engineers Pub Date : 2007-03-27 DOI: 10.1109/CPRE.2007.359889

C. Mozina

引用次数: 60

The Power of Modern Relays Enables Fundamental Changes in Protection and Control System Design 现代继电器的力量使保护和控制系统设计发生了根本性的变化

2007 60th Annual Conference for Protective Relay Engineers Pub Date : 2007-03-27 DOI: 10.1109/CPRE.2007.359892

M. Thompson

{"title":"The Power of Modern Relays Enables Fundamental Changes in Protection and Control System Design","authors":"M. Thompson","doi":"10.1109/CPRE.2007.359892","DOIUrl":"https://doi.org/10.1109/CPRE.2007.359892","url":null,"abstract":"Modern microprocessor relays are fundamentally different from protective relay technologies used in the past. Many paradigms that drove designs in the past are no longer valid. This paper describes many design concepts that can be used to improve the performance, reliability, robustness, and fault tolerance of protection and control systems. The design concepts that are presented in this paper are based upon experience gained in designing and commissioning many fully integrated protection and control systems currently in the field. If the design is approached from the beginning with consideration for integrating protection, metering, and control upon a foundation of modern multifunction programmable relays, we can create a system that has built-in continuous self-test features. We can extend the concept of continuous self-test that we have enjoyed in the relays themselves to the entire system. The design concepts discussed in this paper can make problems and failures that would be hidden in a traditional design, readily apparent so that they can be corrected before undesired operation can occur. These features generally do not require increased cost but are obtained by making use of the capabilities available in the powerful relays already being used","PeriodicalId":438320,"journal":{"name":"2007 60th Annual Conference for Protective Relay Engineers","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131771356","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

Input Source Error Concerns for Protective Relays 保护继电器的输入源错误问题

2007 60th Annual Conference for Protective Relay Engineers Pub Date : 2007-03-27 DOI: 10.1109/CPRE.2007.359891

D. Angell, D. Hou

引用次数: 18

Protection of Double Circuit Transmission Lines 双回传输线的保护

2007 60th Annual Conference for Protective Relay Engineers Pub Date : 2007-03-27 DOI: 10.1109/CPRE.2007.359893

A. Apostolov, D. Tholomier, S. Sambasivan, S. Richards

引用次数: 44

Tripping with the Speed of Light: Arc Flash Protection 以光速跳闸:电弧闪光保护

2007 60th Annual Conference for Protective Relay Engineers Pub Date : 2007-03-27 DOI: 10.1109/CPRE.2007.359903

R.A. Wilson, R. Harju, J. Keisala, S. Ganesan

引用次数: 40

Practical Considerations of CT Performance CT性能的实际考虑

2007 60th Annual Conference for Protective Relay Engineers Pub Date : 2007-03-27 DOI: 10.1109/CPRE.2007.359888

M. Yahyavi, F. Brojeni, M. Vaziri

{"title":"Practical Considerations of CT Performance","authors":"M. Yahyavi, F. Brojeni, M. Vaziri","doi":"10.1109/CPRE.2007.359888","DOIUrl":"https://doi.org/10.1109/CPRE.2007.359888","url":null,"abstract":"Current transformer (CT) has a critical role in protective and measurement devices used in both the industrial and the utility worlds. Selection of a CT type, class, and ratio for a utility distribution feeder is a function of several variables. Type of feeder, available fault duty, CT types, and values of connected burden can significantly influence the selection parameters. An optimal procedure for selection of the correct type and ratio can be challenging depending on the application. These challenges usually stem from a variety of reasons. Differences in the available standards, unfamiliarity of the user with some of the basic concepts, and complexities of the analyses for transient responses are among some of the major difficulties in need of further studies and clarification. In this paper, a brief discussion about the theory and the governing fundamentals of a CT is presented. A classical modeling of the CT identifying the essential parameters is introduced and the basic formulas relating the CT voltage, current, burden, and their relationships have been discussed. Practical procedures for measuring of the phase to phase and phase to ground burdens of the CTs connected to a typical distribution circuits have been shown and analyzed. ANSI and IEC standards and definitions regarding CT types, accuracy class, CT characteristics, and CT burdens have been introduced and compared. Concerns of CT saturation have been addressed and examples showing step by step calculations regarding simple analyses have been provided. Finally, dynamic characteristics of a CT for generalized saturation analyses during transient conditions have been introduced. Concluding remarks regarding practical approximations and guiding principles have been presented","PeriodicalId":438320,"journal":{"name":"2007 60th Annual Conference for Protective Relay Engineers","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115853979","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