TELESCON '94 - The First International Telecommunications Energy Special Conference最新文献_第3页

Computer-Aided Analysis and Implementation of Optimized PWM Waveforms for Real-Time Control 用于实时控制的优化PWM波形的计算机辅助分析与实现

TELESCON '94 - The First International Telecommunications Energy Special Conference Pub Date : 1994-04-11 DOI: 10.1109/TELESC.1994.4794353

A. Kadhim, D. O'kelly

引用次数: 0

Technical Evolution of -48V and -60V DC Power Plants Reduces the Need for UPS in the Telecom Industry -48V和-60V直流电站的技术演进减少了电信行业对UPS的需求

TELESCON '94 - The First International Telecommunications Energy Special Conference Pub Date : 1994-04-11 DOI: 10.1109/TELESC.1994.4794369

B. Lindemark

引用次数: 0

Trend of the Batteries Development for the Telecommunications 电信用电池的发展趋势

TELESCON '94 - The First International Telecommunications Energy Special Conference Pub Date : 1994-04-11 DOI: 10.1109/TELESC.1994.4794332

N. Korovin

引用次数: 0

Shape of Battery Capacity-Life Curve as a Decisive Decision-Making Parameter 作为决定性决策参数的电池容量寿命曲线形状

TELESCON '94 - The First International Telecommunications Energy Special Conference Pub Date : 1994-04-11 DOI: 10.1109/TELESC.1994.4794322

T. Suntio, P. Waltari, J. Rajamaki

{"title":"Shape of Battery Capacity-Life Curve as a Decisive Decision-Making Parameter","authors":"T. Suntio, P. Waltari, J. Rajamaki","doi":"10.1109/TELESC.1994.4794322","DOIUrl":"https://doi.org/10.1109/TELESC.1994.4794322","url":null,"abstract":"The end of useful battery life is normally deflated as the point at which battery capacity has reduced ca. 20 % from the nominal value. This aging is typically taken into account by multiplying the back-up time value by a factor of 1.25. The effect of capacity reduction on back-up time depends, however, on the lenght of the discharge time. If the discharge time is in the order of hours, then the 20 % reduction of capacity results in ca. 20 % reduction of back-up time. If the discharge time is in the order of 10 minutes then the effect could be ca. 50 % reduction of back-up time. This means that a 25 % increase in back-up time is not sufficient in this case. The shape of battery capacity-life curve is more important than people normally think Their thinking is affected by the experience gained from the use of flooded batteries: The actual capacity of a battery is often higjer than nominal after the use of 10 yrs and the reduction is very gradual even after this. In the case of VR-batteries the shape of capacity-life curve can be quite different from that of flooded batteries. The rate of capacity reduction can increase along the lift and be very steep at the end of life. This raises a question whether the aging can be taken into account feasibly at all.","PeriodicalId":178715,"journal":{"name":"TELESCON '94 - The First International Telecommunications Energy Special Conference","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131895605","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: 4

A New High Performance Medium Range Rating UPS 一种新型高性能中量程UPS

TELESCON '94 - The First International Telecommunications Energy Special Conference Pub Date : 1994-04-11 DOI: 10.1109/TELESC.1994.4794362

G. Raybaut, S. Bernard, M. Gerin

引用次数: 0

Sub-Kilowatt Telecom Rectifiers: Design Trade-Offs 亚千瓦级电信整流器:设计权衡

TELESCON '94 - The First International Telecommunications Energy Special Conference Pub Date : 1994-04-11 DOI: 10.1109/TELESC.1994.4794341

A. Kislovski

引用次数: 2

Some Problems of Assessing the State of Health of Lead-Acid Batteries During Operation 铅酸蓄电池运行中健康状态评估的若干问题

TELESCON '94 - The First International Telecommunications Energy Special Conference Pub Date : 1994-04-11 DOI: 10.1109/TELESC.1994.4794321

Martin Ignatov, B. Monahov

{"title":"Some Problems of Assessing the State of Health of Lead-Acid Batteries During Operation","authors":"Martin Ignatov, B. Monahov","doi":"10.1109/TELESC.1994.4794321","DOIUrl":"https://doi.org/10.1109/TELESC.1994.4794321","url":null,"abstract":"1. Background Telecommunications need reliable batteries as spare power supply. This explains the intensive search for informative and easy-to-perform testing methods for determining the battery and/or cell state of health. Stabonary computerized battery monitoring and testing systems are often economically not acceptable, especially for small telecommunication stations. Single classical testing methods (electrolyte density, open circuit and charge/discharge voltage, constant peak load, electrometry etc.) are often not able to ensure early-stage diagnostcs of battery's state-of-health. Modern testing methods like conductance measurements [1,2] however give not always satisfactory results because of the complicated electrochemical processes inside the battery. The problem for proper battery maintenance is to find inexpensive but reliable testing methods. In this study we try to check how relevant the results obtained by different state-of-health determining methods are to the actual capacity of lead-acid batteries used in telecommunication stations. The batteries under tests have been randomly selected among those used in the Bulgarian Telecommunication Company. All measurements were performed under real battery operating conditons and according to the existing measuring possibilities.","PeriodicalId":178715,"journal":{"name":"TELESCON '94 - The First International Telecommunications Energy Special Conference","volume":"25 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116349673","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

Applications of CCITT-GAS4 Recommandations for Solar/Diesel Hybrid Telecom Stations CCITT-GAS4在太阳能/柴油混合通信站中的应用

TELESCON '94 - The First International Telecommunications Energy Special Conference Pub Date : 1994-04-11 DOI: 10.1109/TELESC.1994.4794364

M. Aubree

引用次数: 0

Power Supply for Fitl Systems 填充系统电源

TELESCON '94 - The First International Telecommunications Energy Special Conference Pub Date : 1994-04-11 DOI: 10.1109/TELESC.1994.4794331

Ulrich Nonnenmacher

引用次数: 0

Reliability and Availability Analysis of UPS UPS可靠性与可用性分析

TELESCON '94 - The First International Telecommunications Energy Special Conference Pub Date : 1994-04-11 DOI: 10.1109/TELESC.1994.4794360

T. Hidaka, K. Harada

引用次数: 1