Interconnected power systems

Xem 1-17 trên 17 kết quả Interconnected power systems
  • This paper presents an observer output-feedback load frequency control for power systems with uncertain parameters and time delays in communication networks. First, an observer-based controller is designed dependent on only the observer output. Therefore, the conservatism is reduced and the robustness is enhanced.

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  • This study investigates load frequency control based generalized extended state observer (GESO) for interconnected power system subject to multi-kind of the power plant. First, the mathematical model of the interconnected power system is proposed based on the dynamic model of thermal power plant with reheat turbine and hydro power plant.

    pdf18p nguaconbaynhay11 07-04-2021 0 0   Download

  • The inter-area oscillations in large interconnected power systems often have features of beings low-frequency, lightly damped, and affecting relatively more generating units located in multiple areas. They restrict the allowable power flow on tie - lines and may lead to unexpected contingencies if it is not to be in proper observation.

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  • With the development of power system interconnection, the low-frequency oscillation is becoming more and more prominent which may cause system separation and loss of energy to consumers. This paper presents an innovative robust control for power systems in which the operating conditions are changing continuously due to load changes. However, practical implementation of robust control can be fragile due to controller inaccuracies (tolerance of resistors used with operational amplifiers).

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  • Developing economies are in process of liberalizing their electricity markets, following similar process in developed economics. This process aims at establishing liquid energy exchanges that provide clear price signals, providing indications on the profitability of different operations: Production, retail, trading in interconnections. This paper aims at developing a unit commitment model for examining zonal market pricing in Kazakhstan.

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  • This paper introduces such two typical controllers based on artificial neural networks, namely ANN-based NARMA and ANN- based MRAC. Numerical simulation results obtained by such two controllers when solving the LFC of a twocontrol-area interconnected hydropower grid have verified the feasibility and superiority of the proposed control strategies.

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  • Currently, in Vietnam electricity market, hydropower plants still account for a large proportion approximately 38%. Thus, study on control problems of the hydropower plants plays an extremely important role. Load – frequency control is one of the most significant control problems. Major objectives of such a control strategy are to focus on maintaining the system frequency at a nominal value (50Hz in Vietnam) and the tie-line power interchange at a scheduled value.

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  • This book is intended to give nonelectrical professionals a fundamental understanding of large, interconnected electrical power systems with regard to terminology, electrical concepts, design considerations, construction practices, industry standards, control room operations for both normal and emergency conditions, maintenance, consumption, telecommunications, and safety. Several practical examples, photographs, drawings, and illustrations are provided to help the reader gain a fundamental understanding of electric power systems....

    pdf258p nguyenthai_thinh 16-03-2013 105 30   Download

  • The objectives of the thesis are to study on a method to analyze a large-scale system into a number of relatively independent subsystems (interconnected subsystems). Then, the dissertation will focus on designing a decentralized control method for the large-scale system which has been decomposed into the interconnected subsystems.

    pdf28p capheviahe27 23-02-2021 15 0   Download

  • 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,

    pdf25p daohuongthon 22-01-2010 68 14   Download

  • “Ethernet Passive Optical Network” (hereafter called “EPON Network”) comprises an Optical Line Terminal (OLT) system using its individual OLT to interconnect with one or more specific groups of Optical Network Units (ONUs) via a corresponding number of Passive Optical Distribution Networks (ODNs) to construct a broadband point-to-multipoint access network between central office and customer premises. A Service Provider can provide the broadband triple play services by way of the EPON Network, such as high-speed Internet access, VoIP and IPTV services.

    pdf49p truongpxt 09-08-2013 95 5   Download

  • Gerontogeriatric nursing groups knowledge and nursing practices derived from General Nursing, Geriatrics and Gerontology(3). Gerontogeriatric nursing is, in addition, a specific branch of nursing that delivers care to the elderly at all levels of prevention, i.e., from health promotion to rehabilitation. This nomenclature was selected because it is understood as being more comprehensive and adequate(4).

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  • (bq) part 1 book "cmos vlsi design - a circuits and systems perspective" has contents: introduction, mos transistor theory, cmos processing technology, delay, power, interconnect, robustness, circuit simulation.

    pdf353p bautroibinhyen20 06-03-2017 36 4   Download

  • An Artificial Neural Network (ANN) is an information processing paradigm that is inspired by the way biological nervous systems, such as the brain, process information. The key element of this paradigm is the novel structure of the information processing system. It is composed of a large number of highly interconnected processing elements (neurones) working in unison to solve specific problems. The artificial neural network is increasingly used as a powerful tool for many real-world problems. In Textiles and Clothing industries, it involves the interaction of a large number of variables.

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  • CHAPTER 2 7 MATHEMATICAL MODELS OF DYNAMIC PHYSICAL SYSTEMS K. Preston White, Jr. Department of Systems Engineering University of Virginia Charlottesville, Virginia 27.1 RATIONALE 27.2 IDEAL ELEMENTS 27.2.1 Physical Variables 27.2.2 Power and Energy 27.2.3 One-Port Element Laws 27.2.4 Multiport Elements 27.3 SYSTEM STRUCTURE AND INTERCONNECTION LAWS 27.3.1 A Simple Example 27.3.2 Structure and Graphs 27.3.3 System Relations 27.3.4 Analogs and Duals 27.4 795 796 796 797 798 799 802 802 804 806 807 27.5 APPROACHES TO LINEAR SYSTEMS ANALYSIS 27.5.1 Transform Methods 27.5.

    pdf35p hadalabo 29-09-2010 55 6   Download

  • Parallel and distributed computing has offered the opportunity of solving a wide range of computationally intensive problems by increasing the computing power of sequential computers. Although important improvements have been achieved in this field in the last 30 years, there are still many unresolved issues. These issues arise from several broad areas, such as the design of parallel systems and scalable interconnects, the efficient distribution of processing tasks, or the development of parallel algorithms....

    pdf298p bi_bi1 11-07-2012 55 5   Download

  • Real Application Clusters (RAC) comprises several Oracle instances running on multiple clustered computers, which communicate with each other by means of a so-called interconnect. RAC uses cluster software to access a shared database that resides on shared disk. RAC combines the processing power of these multiple interconnected computers to provide system redundancy, near linear scalability, and high availability. RAC also offers significant advantages for both OLTP and data warehouse systems and all systems and applications can efficiently exploit clustered environments. ...

    pdf140p nhacsihuytuan 13-04-2013 31 3   Download



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