58th Annual Conference for Protective Relay Engineers, 2005.最新文献_第3页

SVC protection and control basics (for Entergy's porter SVC with external capacitor bank switching) SVC保护和控制基础知识(用于Entergy的波特SVC与外部电容器组开关)

58th Annual Conference for Protective Relay Engineers, 2005. Pub Date : 2005-04-05 DOI: 10.1109/CPRE.2005.1430424

J. Francois, S. Datta

引用次数: 6

Applying digital current differential systems over leased digital service 在租用的数字业务上应用数字电流差分系统

58th Annual Conference for Protective Relay Engineers, 2005. Pub Date : 2005-04-05 DOI: 10.1109/CPRE.2005.1430444

K. Fodero, G. Rosselli

{"title":"Applying digital current differential systems over leased digital service","authors":"K. Fodero, G. Rosselli","doi":"10.1109/CPRE.2005.1430444","DOIUrl":"https://doi.org/10.1109/CPRE.2005.1430444","url":null,"abstract":"In the early 1980s, many utilities had current differential pilot wire systems installed on lower voltage lines. These relay systems were applied over either a privately owned communications cable (pilot wire) or a dedicated leased circuit from the local telephone company. In the mid-to-late 1980s, the digital communications boom began and telephone companies started converting their infrastructure to fiber optics. New fiber-optic technologies like SONET and ATM allowed the telephone companies to take advantage of the high bandwidth fiber optics and allowed the greater flexibility of circuit allocation and routing. As with all new technology, this new communications architecture was promoted as great for everybody except, of course, those applications designed to operate specifically over a point-to-point dedicated circuit. Many utilities that relied on these circuits for their pilot wire relaying were advised that these circuits would be obsolete and no longer available. The existing pilot wire relays would not operate over the new circuits, creating a dilemma for the utilities that had relied on them. Faced with this challenge, some utilities converted their pilot wire systems to fiber optic, some converted the protection schemes to distance-based pilot protection, and some held on to the old system as long as possible. In the 1990s, current differential relay systems also evolved from their analog pilot wire roots to completely digital systems with modern high-speed digital communication interfaces. Now, once again, many utilities desired to apply these systems over leased digital communication circuits.","PeriodicalId":395312,"journal":{"name":"58th Annual Conference for Protective Relay Engineers, 2005.","volume":"235 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133350432","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 importance of site selection for series compensation 串联补偿选址的重要性

58th Annual Conference for Protective Relay Engineers, 2005. Pub Date : 2005-04-05 DOI: 10.1109/CPRE.2005.1430434

N. Saia

引用次数: 4

Generator characteristics and their influence on relaying 发电机特性及其对继电保护的影响

58th Annual Conference for Protective Relay Engineers, 2005. Pub Date : 2005-04-05 DOI: 10.1109/CPRE.2005.1430416

W. Elmore

引用次数: 0

The major differences between electromechanical and microprocessor based technologies in relay setting rules for transformer current differential protection 变压器电流差动保护的继电整定规则与微机技术的主要区别

58th Annual Conference for Protective Relay Engineers, 2005. Pub Date : 2005-04-05 DOI: 10.1109/CPRE.2005.1430436

M. Ristic, M. Thakur, M. Vaziri

引用次数: 2

Practical considerations for single-pole-trip line-protection schemes 单极脱扣线路保护方案的实际考虑

58th Annual Conference for Protective Relay Engineers, 2005. Pub Date : 1900-01-01 DOI: 10.1109/cpre.2005.1430423

F. Calero, D. Hou

引用次数: 4

Successful DG projects: design and build considerations 成功的DG项目:设计和构建考虑

58th Annual Conference for Protective Relay Engineers, 2005. Pub Date : 1900-01-01 DOI: 10.1109/CPRE.2005.1430426

D. Hornak, D.L. Hopper

{"title":"Successful DG projects: design and build considerations","authors":"D. Hornak, D.L. Hopper","doi":"10.1109/CPRE.2005.1430426","DOIUrl":"https://doi.org/10.1109/CPRE.2005.1430426","url":null,"abstract":"These four projects are in service in three different utility jurisdictions. They are connected to the distribution lines and a 69 kV customer-owned substation. The need for these facilities varied with each location, and the economic studies showed a good payback for this DG investment. Two of the projects are in southern California and are installed on the process industries distribution delivery point. The goal was reliability and continuity of service when the industrial customers are curtailed during a shortage of energy from the supplying utility. In one case, the use of natural gas for the 2-700 kW diesel generator sets meets the California Emission Standards for cleaner air. The use of numeric protective relays for generator, feeder, and intertie protection reduced the cost for the multifunction protective systems in the customer-owned medium voltage switchgear lineup. An automobile glass manufacturing plant project in Tennessee balanced the electric cost with the cost to generate for the glass process. This interconnection for parallel operation is at the low side of the customer-owned 69/12 kV substation. The supplying utility is a gas and electric utility that buys power wholesale for resale. The fourth project is a combined heat and power installation in the NY City area. It saves the condominium association significant HVAC system costs. The generator is an induction machine driven by a steam turbine and interconnected on the customer's side of the utility revenue meter. The turbine generator and parallel interconnection are protected by numerical protective systems.","PeriodicalId":395312,"journal":{"name":"58th Annual Conference for Protective Relay Engineers, 2005.","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125685554","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