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Dissertation

Influência do controle de frequência tipo carga dump na regulação de tensão de micro centrais elétricas

04 Dec 2011-
TL;DR: In this article, a regulacao de tensao pode ser influenciada by esse kind of controle, visto que a caracteristica de carga passa a depender tambem dessa cargaa auxiliar.
Abstract: Em micro centrais eletricas isoladas, as vezes, o regulador de velocidade pode ser substituido por uma carga auxiliar, chamada comumente de carga “dump”. Nestes casos, a regulacao de tensao pode ser influenciada por esse tipo de controle, visto que a caracteristica de carga passa a depender tambem dessa carga auxiliar. Neste trabalho e avaliada, a influencia do referido controle de frequencia, na regulacao de tensao de micro centrais eletricas isoladas. Em geral a carga “dump” faz com que o conjunto turbina-gerador perceba de instante em instante uma carga aproximadamente fixa, e a expectativa e que o controle de frequencia contribua favoravelmente com a regulacao de tensao. Entretanto, outros aspectos devem ser considerados, como por exemplo, o fator de potencia da carga, do qual a regulacao de tensao tambem e dependente.
References
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Journal ArticleDOI
TL;DR: In this article, the authors describe the original research and development of an electronic load governor which is microprocessor-based and incorporates three-phase balancing, and the results of the implementation of the advanced algorithm in the control of micro hydroelectric power generation are presented and compared with the original algorithm.
Abstract: This paper describes the original research and development of an electronic load governor which is microprocessor-based and incorporates three-phase balancing. The combined study and testing of the transient behaviour of the governor indicated the need for an improved control algorithm. The results of the implementation of the advanced algorithm in the control of micro hydroelectric power generation are presented and compared with the original algorithm.

96 citations

Proceedings ArticleDOI
08 Jan 1996
TL;DR: In this article, the authors describe the original research and development of an electronic load governor which is microprocessor-based and incorporates three-phase balancing, and the results of the implementation of the advanced algorithm in the control of micro hydroelectric power generation are presented and compared with the original algorithm.
Abstract: This paper describes the original research and development of an electronic load governor which is microprocessor-based and incorporates three-phase balancing. The combined study and testing of the transient behaviour of the governor indicated the need for an improved control algorithm. The results of the implementation of the advanced algorithm in the control of micro hydroelectric power generation are presented and compared with the original algorithm.

50 citations

01 Jan 2010
TL;DR: In this paper, the TRIAC switched capacitor (TSC) based voltage regulation of a 3-O self-excited asynchronous generator (SEASG) fed RL loads is discussed.
Abstract: This paper expound the TRIAC switched capacitor (TSC) based voltage regulation of a 3-O self-excited asynchronous generator (SEASG) fed RL loads. A new self-regulated linear ramp signal based triggering circuit proposed and implemented to switch ON the TRIAC, which includes an external capacitor in the circuit. Steady state equivalent analysis of SEASG has been completed with load and external capacitor. Performance characteristics of SEASG have been simulated using power system toolbox in Mat lab/Simulink software. A prototype model of the triggering circuit has been developed, constructed and tested in the laboratory model of SEASG. The simulated and experimental result presented and discussed.

4 citations

Journal ArticleDOI
01 May 1973
TL;DR: In this paper, a potential transformer and a thyristor-controlled ac-to-dc converter are used to derive the excitation energy of a synchronous machine from its output terminals.
Abstract: The description of a scheme where all the excitation energy of a synchronous machine is derived from its output terminals through a potential transformer and a thyristor-controlled ac-to-dc converter is presented. The circuit is controlled by a strong feedback loop and performs the functions of both the conventional exciter and an automatic voltage regulator. The excitation energy is supplied in the form of dc voltage pulses of constant amplitude and variable width at constant frequency. The scheme is meant for isolated power supply and requires only a 12-V dry cell for triggering a pair of thyristors. Some experimental difficulties are also discussed.

1 citations