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• W2296005150 abstract "In the last decades an increasing number of non linear and time variant loads has been connected to the distribution network, thus affecting voltage and power quality in transmission and distribution networks. On the other hand, there is an increasing demand for premium electric power, in terms of quality and reliability, calling for regulatory provisions to limit the harmonic and unbalance impact of loads and technical provisions to reduce voltage distortion and asymmetry. Moreover, following international policies toward environment-sustainable development, power sources making use of renewable energy are developing fast and become more and more diffused in electrical networks. In the coming years, we therefore expect a capillary distribution of electronic interfaces controlling the energy flow from distributed “green” power sources and the distribution network. A completely new scenario for energy generation and management will therefore appear, in a situation where the distribution backbone remains substantially unchanged.The work of this dissertation takes origin from the above context, which shows the need for coordinated operation of the various power sources and compensation equipment distributed in the grid, in a situation where the supply is affected by distortion and asymmetry and the loads pollute harmonics, reactive currents and phase unbalance. The goal of this work is to establish a theoretical background and to develop criteria and control algorithms to manage cooperatively a system of distributed electronic interfaces and compensation equipment, so as to optimize the network operation in terms of power quality and efficient use of energy.This means to face the issue of reactive, harmonic and unbalance compensation, not only at local level, as commonly done at the time of writing, but at a system level. The primary concern is to exploit every equipment at its best, while avoiding detrimental interactions among them.An innovative and comprehensive approach is presented here, which is capable to deal with actual networks (characterized by unbalance, distortion and asymmetry) and is developed in the distributed and cooperative perspective. In particular, supervision (global) and local control algorithms are developed, which apply to every type of compensation equipment, from Static VAR Compensators to Active Power Filters and Electronic Interfaces. The control approach lays on a set of conservative quantities, which keep their meaning irrespective of voltage level and phase shift and are therefore capable to provide a general descriptive and communication background of the electrical system. Several control techniques are analyzed, underlining their advantages and drawbacks, and eventually a simplified control method is developed which can easily be implemented and applies both to single-phase and three-phase systems. Such approach is analyzed in detail and extended to face the problems of unbalanced and asymmetrical systems.Several simulation results are provided to illustrate properties and operation of the solutions analyzed and developed in the various steps of the work." @default.
• W2296005150 created "2016-06-24" @default.
• W2296005150 creator A5041241732 @default.
• W2296005150 date "2009-01-01" @default.
• W2296005150 modified "2023-09-26" @default.
• W2296005150 title "Cooperative control of distributed compensation systems in electric networks under non-sinusoidal operations" @default.
• W2296005150 hasPublicationYear "2009" @default.
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