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Electric utility systems

Xem 1-20 trên 31 kết quả Electric utility systems
  • Power engineering is the oldest and most traditional of the various areas within electrical engineering, yet no other facet of modern technology is currently undergoing a more dramatic revolution in technology or business structure. Perhaps the most fundamental change taking place in the electric utility industry is the move toward a quantitative basis for the management of service reliability.

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  • The rapid development of science and technology leads to improvement of human life, but also creating of new crisis situation. Mankind is confronted with risks that have not been seen before in human history. Global worming is one of the typical examples. Although ma‐ jority of the experts that are studying climate changes claim that global worming is a fact and that it is caused by human, there are also scientists that doubt those statements. One of the main problems related to critical situations is – mater of responsibility.

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  • Power electronics is the technology of processing and controlling the flow of electric energy by supplying voltages and currents in a form that is optimally suited to the end-user’s requirements [1].Atypical block diagram is given in Figure 1.1 [2]. The input power can be either AC and DC sources. A general example is one in which the AC input power is from the electric utility. The output power to the load can be either AC and DC voltages. The power processor in the block diagram is usually called a converter. Conversion technologies are used to construct converters.

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  • The mechatronic servo system is the major theme studied in this book. In particular, the servo system adopted in an electric servo motor is explained in this chapter. Several items of its utilization from the development stage to the present as well as its performances. The so-called mechanism machine (called as mechatronic servo system at the following), i.e.

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  • While most HVAC designers will have the support of a competent electrical design staff, it is important to understand certain fundamentals of electricity, power distribution, and utilization, because so many HVAC system devices are mechanically driven and controlled. This book cannot present electrical topics in great detail, but it can address several common topics and refer to more definitive works.

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  • The Lineman’s and Cableman’s Field Manual is written to accompany The Lineman’s and Cableman’s Handbook. The Field Manual contains many of the same pertinent tables, charts, formulas, and safety rules that are found in the Handbook. The goal of the Field Manual is to provide the information that is needed on the job site in a format that can be quickly and easily accessed. This customizable tool provides specially designed notes pages for personal notes.

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  • 5.1 Gas Insulated Substations Philip Bolin 5.2 Air Insulated Substations — Bus/Switching Configurations Michael J. Bio 5.3 High-Voltage Switching Equipment David L. Harris 5.4 High-Voltage Power Electronics Substations Gerhard Juette 5.5 Considerations in Applying Automation Systems to Electric Utility Substations James W. Evans 5.6 Substation Automation John D. McDonald 5.7 Oil Containment Anne-Marie Sahazizian and Tibor Kertesz 5.8 Community Considerations James H. Sosinski 5.9 Animal Deterrents/Security C.M. Mike Stine and Sheila Frasier 5.10 Substation Grounding Richard P. Keil 5.

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  • 2.1 Hydroelectric Power Generation Steven R. Brockschink, James H. Gurney, and Douglas B. Seely 2.2 Syncrhonous Machinery Paul I. Nippes 2.3 Thermal Generating Plants Kenneth H. Sebra 2.4 Distributed Utilities John R. Kennedy

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  • Carbon dioxide is produced in several anthropogenic activities at a rate of ca. 35 Gt/y. The main sources are: (1) the combustion of fossil carbon (production of electric energy, transport, heating, industry), (2) the utilization of biomass (combustion to obtain energy, fermentation), and (3) the decomposition of natural carbonates (mainly in the steel and cement industry).

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  • Packet Radio When station has frame, it sends Station listens (for max round trip time)plus small increment If ACK, fine. If not, retransmit If no ACK after repeated transmissions, give up Frame check sequence (as in HDLC) If frame OK and address matches receiver, send ACK Frame may be damaged by noise or by another station transmitting at the same time (collision) Any overlap of frames causes collision Max utilization 18%

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  • Electric motors convert electrical energy into mechanical energy by utilizing the properties of electromagnetic energy conversion. The different types of motors operate in different ways and have different methods of calculating the performance, but all utilize some arrangement of magnetic fields. Understanding the concepts of electromagnetics and the systems of units that are employed is essential to understanding electric motor operation.The first part of this chapter covers the concepts and units and shows how forces are developed.

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  • The overall development objective of the VN-Rural Energy 2 Project is to improve access to good quality, affordable electricity services to rural communities, in an efficient and sustainable manner.

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  • Today’s stringent design requirements and difficult-to-machine materials such as tough super alloys, ceramics, and composites, have made traditional machining processes costly and obsolete. As a result, manufacturers and machine design engineers are turning to advance machining processes. These machining processes utilizes electrical, chemical, and optimal sources of energy to bind, form and cut materials.

    pdf286p chipmoon 19-07-2012 59 20   Download

  • Automobile electrical and electronic systems to explain their detailed operation. The intention is to describe briefly how the circuits work and, more importantly, how and where they may be utilized in vehicle applications. The circuits described are examples of those used and many pure electronics books are available for further details. Overall, an understanding of basic electronic principles will help to show how electronic control units work, ranging from a simple interior light delay unit, to the most complicated engine management system. ...

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  • The City of Naperville operates a Department of Public Utilities, which includes a municipal electric utility. Naperville’s electrical distribution system is nearly 90% underground, except in older areas of town where overhead facilities are still utilized. The nominal voltage of the system is 12.47kV transformed from 34.5kV and 138kV. There are 6 points of service on the 138kV transmission system from bulk power providerComEd. The City does not have generation capability at this time.

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  • An electric power system is an interconnection of generating units to load centers through high-voltage electric transmission lines. It consists of generation, transmission, and distribution subsystems, which used to belong to the same electric utility in a given geographical area. But,

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  • Described as a structural/LID hybrid, the Modular Wetland System – Linear is a revolutionary stormwater treatment system. This treatment system utilizes an innovative combination of physically passive and natural biological treatment processes, including the use of a breakthrough filter media, BioMediaGREEN, which acts as a pre-treatment media filter for the enhanced 4th generation sub-surface flow wetland. These features combined with other various treatment and flow control technologies has lead to a system that maximizes pollutant removal and minimizes maintenance. ...

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  • Every employee has a story at Cummins Power Generation. Some are stories of coming to work with a parent when they were young, becoming employees themselves, then watching their children as they carry on the legacy. Others tell of starting at a distributorship and moving on to one of the many Cummins Power Generation offices located around the world. Some tell of starting at a regional office, before moving to global headquarters. Others talk of their days as customers working for utility companies.

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  • This application note provides detailed alternatives for transporting the Soneplex Broadband and Soneplex Loop Extender alarm and performance information from a remote location back to the central/hubbing location. The Soneplex Broadband System is used as an intelligent network hub for DS1 hicap distribution in the local loop. The network interface is one standard electrical DS3 signal. This DS3 signal is demultiplexed into twenty-eight DS1 circuits, which can then be delivered to up to twenty-eight remote locations utilizing either fiber or copper facilities....

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  • NASA’s budget for fiscal year 2003 included funds to begin the Nuclear Systems Initiative focused on research into and development of enhanced capabilities in the general areas of spacecraft power and propulsion systems.

    pdf159p tom_123 14-11-2012 31 2   Download

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