INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference最新文献_第6页

Input current-ripple reduction of a pulse-link DC-AC converter for fuel cells 用于燃料电池的脉冲链直流-交流变换器的输入电流纹波减小

INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664104

K. Fukushima, I. Norigoe, T. Ninomiya, M. Shoyama, Y. Harada, K. Tsukakoshi

{"title":"Input current-ripple reduction of a pulse-link DC-AC converter for fuel cells","authors":"K. Fukushima, I. Norigoe, T. Ninomiya, M. Shoyama, Y. Harada, K. Tsukakoshi","doi":"10.1109/INTLEC.2008.4664104","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664104","url":null,"abstract":"This paper considers that the mechanism of input current-ripple on pulse-link DC-AC converter for fuel cells. And the reduction methods are shown. In general, fuel cells are weak about current ripple. The current-ripple damages to the fuel capacity and life span because the chemical reaction time when generates electricity is much slower than commercial frequency. Therefore, the input current-ripple reduction is essential factor in the DC-AC converter for fuel cells applications. In the conventional DC-AC converter topology, large smoothing capacitor is worked as the input current-ripple reduction. However, this large capacitor makes it difficult to reduce the size of DC-AC converter unit. Authors have proposed a novel topology called as pulse-link DC-AC converter. In this topology, a large capacitor for the smoothed DC power source is not needed because the first-stage boost converter provides boosted voltage pulse directly to PWM inverter. Instead, a series-connected LC circuit is inserted to reduce the input current-ripple. Furthermore, when duty ratio is controlled by sensing input current, input current-ripple is reduced less than 1 Amp.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115669208","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

A two-stage converter based controller for a stand alone wind energy system used for remote applications 用于远程应用的独立风能系统的基于两级变换器的控制器

INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664033

A. K. Sinha, Deepak Kumar, P. Samuel, Rajesh Gupta

{"title":"A two-stage converter based controller for a stand alone wind energy system used for remote applications","authors":"A. K. Sinha, Deepak Kumar, P. Samuel, Rajesh Gupta","doi":"10.1109/INTLEC.2008.4664033","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664033","url":null,"abstract":"This paper proposes a control strategy for tracking and maintaining a constant voltage and frequency across remote loads through stand alone variable speed wind energy conversion system (VSWECS). The system consists of a variable speed wind turbine coupled to a permanent magnet synchronous generator (PMSG). Output of the PMSG is first converted into a fixed DC voltage using a buck chopper. The control of the chopper is achieved by varying the duty ratio of the gating pulses of the power electronic switches. The dc output from the chopper is then inverted to obtain the ac supply using a pulse width modulated (PWM) inverter. The control of the inverter is achieved by changing the modulation index of the PWM. Both the dc output voltage of the chopper and AC output voltage of the inverter are controlled through the proposed controllers that follows the common control law. The proposed wind energy scheme has been simulated and analyzed in the MATLAB/SIMULINK platform for different wind speeds and load variations. The scheme is also designed with power alternatives so as to ensure the uninterrupted operation to overcome the problem of very low wind speeds.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115713279","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: 12

Hydrogen delivery and storage options for backup power and off-grid primary power fuel cell systems 备用电源和离网主动力燃料电池系统的氢气输送和储存选择

INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664091

M. Cohen, G. C. Snow

{"title":"Hydrogen delivery and storage options for backup power and off-grid primary power fuel cell systems","authors":"M. Cohen, G. C. Snow","doi":"10.1109/INTLEC.2008.4664091","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664091","url":null,"abstract":"As fuel cells become a larger percentage of telecom backup power packages, the delivery and storage of hydrogen is key. ReliOn has been at the forefront of hydrogen supply alternatives and infrastructure strategies since the company was established in 1995. This work has included fuel reforming and chemical production R&D programs, metal hydride testing, electrolyzer investigations, high pressure storage evaluations and conventional packaged gas and bulk gas distribution infrastructure. ReliOn continues to support customers with assistance in securing commercially mature, cost-effective and available hydrogen distribution and storage solutions. This paper focuses on hydrogen delivery, distribution and storage options which are available today or are expected to become cost-effective and commercially viable in the near future. Current fueling solutions include hydrogen cylinder distribution and exchange services provided by national or regional gas suppliers and/or third party service providers. Near term alternatives under development involve field refill of fixed vessels in hydrogen storage cabinets, ground storage modules or composite pressure vessels. This option-patterned on bulk gas deliveries to industrial users-can provide extended run time, reduce labor requirements and transport logistics, and decrease hydrogen wastage. Other options include high pressure hydrogen delivery and storage; and additional bulk hydrogen delivery systems under development. Discussion will be added regarding alternate methods for providing hydrogen which are not yet seen as commercially mature.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125272850","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: 6

Improved AC immunity of ground fault protection in span power systems 提高跨电力系统接地故障保护的交流抗扰度

INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664101

John Babineau, G. Moschopoulos

引用次数: 1

A method for determining optimum design for fuel-cell-based energy network 基于燃料电池的能源网络优化设计的确定方法

INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664027

T. Hayashi, A. Takeuchi, Y. Nozaki

引用次数: 3

Hybrid power plants combining old and new technologies 结合新旧技术的混合动力发电厂

INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664093

B. Bailey

引用次数: 0

A novel PFC circuit for three-phase utilizing a single switching device 一种利用单一开关装置的新型三相PFC电路

INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664043

N. Takeuchi, K. Matsui, I. Yamamoto, M. Hasegawa, F. Ueda, H. Mori

{"title":"A novel PFC circuit for three-phase utilizing a single switching device","authors":"N. Takeuchi, K. Matsui, I. Yamamoto, M. Hasegawa, F. Ueda, H. Mori","doi":"10.1109/INTLEC.2008.4664043","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664043","url":null,"abstract":"Nonlinear rectifier circuits, having capacitors or inductors, are generally used as rectifier circuits, such as those in consumer electronics and appliances. It is known that such rectifiers generate various harmonics in the power system. To reduce these harmonic problems, various original PFC (Power Factor Correction) circuits have been proposed. Amongst these, Prasad-Ziogas, et al, have proposed a PFC scheme using single switching device for three phase circuit applications. This method achieves a PFC effect by simultaneously creating three phase supplies by the use of a single switch through an inductor. On the basis of this scheme, we propose an alternative PFC circuit. This method attempts to improve the input current, approaching a nearly sinusoidal waveform, by using an intermediate capacitor circuit, with a method of operation analogous to the conventional method having capacitor filter, but is, nonetheless, original. Various fundamental operations have been considered and have been confirmed by computer simulation. Compared with the conventional Prasad-Ziogas circuits, the construction is a little more complicated, but the output power can be much increased, in addition to improved THD (Total Harmonic Distortion).","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126965251","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

Halve the power related costs for a cluster of diesel-fed telecom sites 将一组柴油供电的电信站点的电力相关成本减半

INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664073

L. Efraimsson

引用次数: 3

Practical development of half-bridge high frequency PWM inverter-linked DC-DC converter with diode-clamped active edge resonant cells and extended topologies 具有二极管箝位有源边缘谐振单元和扩展拓扑结构的半桥高频PWM逆变器连接DC-DC变换器的实用开发

INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664106

T. Etoh, T. Doi, K. Morimoto, T. Ahmed, H. Sugimura, B. Saha, M. Nakaoka

引用次数: 4

Zero voltage switching asymmetrical half-bridge converter topology 零电压开关非对称半桥变换器拓扑结构

INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI: 10.1109/INTLEC.2008.4664105

C. D. Davidson

{"title":"Zero voltage switching asymmetrical half-bridge converter topology","authors":"C. D. Davidson","doi":"10.1109/INTLEC.2008.4664105","DOIUrl":"https://doi.org/10.1109/INTLEC.2008.4664105","url":null,"abstract":"This paper describes a buck derived isolated DC/DC converter topology that includes a half-bridge of switching devices which are asymmetrically controlled so that the top and bottom switches are opened at mutually exclusive times. The center-tap of this half-bridge is connected to the primary winding of the isolation transformer along with a series connection of a small resonant inductor and half-bridge of capacitors. The secondary winding of the isolation transformer is connected via a blocking capacitor to a single output rectification diode and an inductor-capacitor (LC) low pass filter to provide a regulated output. Additionally a voltage clamping circuit which includes an active switch, that may also be connected to the output filter inductor, can be added across the output rectifier to control the voltage across the output rectifier diode and recover the energy stored in the resonant inductor and leakage inductance of the isolation transformer. This converter topology has been shown to provide zero voltage switching of the half-bridge of switching devices over a wide load range and zero current switching of the output rectification device. This topology has been incorporated into 1.5 kW and 2 kW switch-mode rectifiers for telecom applications with 24 Volt and 48 Volt outputs.","PeriodicalId":431368,"journal":{"name":"INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference","volume":"15 17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124252658","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