21st International Telecommunications Energy Conference. INTELEC '99 (Cat. No.99CH37007)最新文献_第2页

Wireless load sharing of single phase telecom inverters 单相电信逆变器的无线负载分担

21st International Telecommunications Energy Conference. INTELEC '99 (Cat. No.99CH37007) Pub Date : 1999-06-09 DOI: 10.1109/INTLEC.1999.794012

K. Wallace, G. Mantov

{"title":"Wireless load sharing of single phase telecom inverters","authors":"K. Wallace, G. Mantov","doi":"10.1109/INTLEC.1999.794012","DOIUrl":"https://doi.org/10.1109/INTLEC.1999.794012","url":null,"abstract":"Telecom systems demand high availability DC power and the battery plant was developed to satisfy that demand. While a case can be made that all telecom loads should be powered from the DC source, the fact remains that today's telecom systems rely on AC powered equipment for all sorts of monitoring and control functions. This equipment is just as critical as the DC load, thus high availability AC power is also needed. Supplying this AC is not easy as the utility grid is prone to outages and transients while standard UPS systems usually require a separate battery plant and still fall short on availability. A key reason that AC inverters have not achieved the availability of DC converter systems is the problem of isolation and redundancy. While straightforward in DC systems, the four quadrant operation of inverters along with the need for phase matching complicates the solution for AC systems. Common synchronizing and control circuits are normally required to parallel inverters but these common circuits are vulnerable to single fault scenarios that can bring down the whole system. This paper describes a means to improve the isolation and redundancy of multiple-inverter systems by eliminating the common synchronizing and control circuits.","PeriodicalId":215980,"journal":{"name":"21st International Telecommunications Energy Conference. INTELEC '99 (Cat. No.99CH37007)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127503561","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: 25

A method for characterisation of three-phase unbalanced dips (sags) from recorded voltage waveshapes 从记录的电压波形中描述三相不平衡陡降的一种方法

21st International Telecommunications Energy Conference. INTELEC '99 (Cat. No.99CH37007) Pub Date : 1999-06-09 DOI: 10.1109/INTLEC.1999.794053

Lidong Zhang, M. Bollen

引用次数: 33

Comparison of high power short time flywheel storage systems 大功率短时间飞轮储能系统的比较

21st International Telecommunications Energy Conference. INTELEC '99 (Cat. No.99CH37007) Pub Date : 1999-06-09 DOI: 10.1109/INTLEC.1999.794130

H. Darrelmann

{"title":"Comparison of high power short time flywheel storage systems","authors":"H. Darrelmann","doi":"10.1109/INTLEC.1999.794130","DOIUrl":"https://doi.org/10.1109/INTLEC.1999.794130","url":null,"abstract":"Uninterruptible power supply (UPS) systems are supported mainly by batteries to cover short network breakdowns. The advantages of batteries in this application are their high degree of modularisation, low charging regime losses and not least their wide spread availability. Disadvantages are their weight, high maintenance costs and their high price if storage times of less than one minute are desired and are sufficient like in the area of power quality improvement. As an alternative to lead acid batteries different storage methods have been investigated. Storage systems like new type batteries, superconductive coils (SMES), pressure reservoir storage and supercapacitors have been taken into consideration. But most of these new techniques are still in the early test phase, run with high losses, require high investment costs or space or are not proven enough. The flywheel technology is the most suitable solution for a high reliable storage in the megawatt/second range. The paper describes the state of the art technology, explains the action principles and compares in particular the two different systems \"high speed flywheel\" and \"low speed flywheel\".","PeriodicalId":215980,"journal":{"name":"21st International Telecommunications Energy Conference. INTELEC '99 (Cat. No.99CH37007)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129366507","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: 20

Solar power systems for telecommunications in remote Arctic areas 用于北极偏远地区电信的太阳能发电系统

21st International Telecommunications Energy Conference. INTELEC '99 (Cat. No.99CH37007) Pub Date : 1999-06-09 DOI: 10.1109/INTLEC.1999.794039

S. Johansen

引用次数: 0

Powering small base stations for mobile 为小型移动基站供电

21st International Telecommunications Energy Conference. INTELEC '99 (Cat. No.99CH37007) Pub Date : 1999-06-09 DOI: 10.1109/INTLEC.1999.794058

A. Buffin, D. Bogaerts

引用次数: 0

Status of the techniques of three-phase rectifier systems with low effects on the mains 对市电影响小的三相整流系统技术现状

21st International Telecommunications Energy Conference. INTELEC '99 (Cat. No.99CH37007) Pub Date : 1999-06-09 DOI: 10.1109/INTLEC.1999.794075

J. Kolar, H. Ertl

引用次数: 191

A cost effective and low environmental impact approach for climate control of outdoor electronic enclosures 一种具有成本效益和低环境影响的室外电子外壳气候控制方法

21st International Telecommunications Energy Conference. INTELEC '99 (Cat. No.99CH37007) Pub Date : 1999-06-09 DOI: 10.1109/INTLEC.1999.794086

E. Canuzzi, F. Palmisano, F. Pizzuti, P. Cinato, A. Kemppainen

{"title":"A cost effective and low environmental impact approach for climate control of outdoor electronic enclosures","authors":"E. Canuzzi, F. Palmisano, F. Pizzuti, P. Cinato, A. Kemppainen","doi":"10.1109/INTLEC.1999.794086","DOIUrl":"https://doi.org/10.1109/INTLEC.1999.794086","url":null,"abstract":"The demand for energy-efficient cooling systems for use in telecommunications is rapidly increasing. After evaluating some of the alternatives to active cooling systems, the authors concentrated on the case of an outdoor cabinet and a cooling system based on a heat exchanger. To begin with, the airflow in a telecommunications outdoor enclosure was calculated with the help of a CFD simulation, which allowed a performance to be predicted. After that the monthly energy consumption of active and heat exchanger systems was evaluated for three places, one in northern, one in central and one in southern Italy. The study showed that energy savings about 50% are possible to achieve by replacing active cooling systems with systems based on heat exchangers. Other benefits are that the climate system availability will be higher due to decreased number of moving parts and the initial investment is also lower for a heat exchanger system. The most environmentally friendly kWh is a saved kWh. It is also important to remember that the heat exchanger solution does not require any use of CFCs.","PeriodicalId":215980,"journal":{"name":"21st International Telecommunications Energy Conference. INTELEC '99 (Cat. No.99CH37007)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123684996","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

Intelligent monitoring system satisfies customer needs for continuous monitoring and assurance on VRLA batteries 智能监控系统满足客户对VRLA蓄电池的持续监控和保障需求

21st International Telecommunications Energy Conference. INTELEC '99 (Cat. No.99CH37007) Pub Date : 1999-06-09 DOI: 10.1109/INTLEC.1999.794126

S. Deshpande, D. Shaffer, J. Szymborski, L. Barling, J. Hawkins

{"title":"Intelligent monitoring system satisfies customer needs for continuous monitoring and assurance on VRLA batteries","authors":"S. Deshpande, D. Shaffer, J. Szymborski, L. Barling, J. Hawkins","doi":"10.1109/INTLEC.1999.794126","DOIUrl":"https://doi.org/10.1109/INTLEC.1999.794126","url":null,"abstract":"Telecom standby power systems being installed or modernized today primarily use VRLA batteries. Many customers ask for diagnostic and monitoring tools, and some sophisticated users want battery monitoring and diagnostic systems that also predict (1) available support time during an ongoing discharge, and (2) remaining battery life prior to replacement. GNB has found only one monitoring system that is comprehensive in monitoring, analyzing and predicting battery data. The \"intelligent monitoring system\", or IMS, is a low-cost universal battery and power monitoring system suitable for implementation across the network. IMS monitors and reports on actual events, which the power system owner wishes to know about, or other events that (from a battery technology point of view) may affect the condition of the installation. Such real-time expert-based systems, which utilize the knowledge of many parameters in data analysis, have the best prospect of satisfying the demands of the more sophisticated VRLA customers for diagnostic and predictive capability.","PeriodicalId":215980,"journal":{"name":"21st International Telecommunications Energy Conference. INTELEC '99 (Cat. No.99CH37007)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131392675","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: 8

Planar transformer technology applied to AC/DC conversion 平面变压器技术在交直流转换中的应用

21st International Telecommunications Energy Conference. INTELEC '99 (Cat. No.99CH37007) Pub Date : 1999-06-09 DOI: 10.1109/INTLEC.1999.794113

J.-P. Schauwers, C. Nunes, B. Velaerts, F. Robert, P. Mathys

引用次数: 6

Statistical parameters model for predicting time to failure of telecommunications batteries 电信电池失效时间预测的统计参数模型

21st International Telecommunications Energy Conference. INTELEC '99 (Cat. No.99CH37007) Pub Date : 1999-06-09 DOI: 10.1109/INTLEC.1999.794114

R.K. Jaworski

引用次数: 12