Results 221 to 230 of about 148,569 (266)

Power system automatic frequency control techniques

Proceedings of the IEE Part A: Power Engineering, 1959
The main reasons for the adoption of automatic control techniques in power systems are given and the position on their application to the British Grid system is stated. The behaviour of speed governors in amanually controlled system, leading to the development of the electrical governor, is discussed, and a Swedish governor of this type is described ...
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Application of Neural Networks to Automatic Load Frequency Control

Proceedings of The 2014 International Conference on Control, Instrumentation, Energy and Communication (CIEC), 2013
The first theoretical analysis on PI controllers dates back to 1910. Even though the speed of response and overall stability of the system is slow, PI controllers are still used today. On the contrary, twenty first century customers, aware of power quality standards, demand faster response and very small settling.
Soumyadeep Nag, Namitha Philip
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Automatic Frequency Control for a Cyclotron

Review of Scientific Instruments, 1941
This paper describes a discriminator circuit which automatically compensates for the changes due to thermal effects in the capacitive and inductive reactances of a quarter-wave-length dee line of a cyclotron. The unit thereby contributes to smoother power input.
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Design of quadricorrelators for automatic frequency control systems

IEEE Transactions on Communications, 1993
The authors investigate the performance of an automatic frequency control loop operating in a receiver for linearly modulated digital signals. The loop uses a balanced quadricorrelator as a frequency detector. The design of such a detector for optimum loop tracing performance is considered.
D'Andrea, Aldo N., Mengali, Umberto
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Automatic over-frequency control scheme implementation

The EU Network Code on Requirements for Grid Connection of Generators (2016/631) mandates that generators be equipped with limited frequency sensitive mode — over-frequency (LFSM-O) controllers to decrease active power production when frequency exceeds a designated level and according to the predicted droop.
Subotić, Srđan, Vukojičić, Nemanja, Josifović, Milan   +2 more
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Automatic frequency control techniques for microwave active filters

1997 IEEE MTT-S International Microwave Symposium Digest, 2002
The paper discusses Phase Locked Loop (PLL) and Magnitude Locked Loop (MLL) techniques based on voltage controlled filter (VCF), for the automatic frequency central (AFC) of active filters. Applications to a microwave planar filter are considered. Theoretical analysis, simulated and measured results are presented for both phase and magnitude control ...
H. Serhan, B. Jarry, P. Guillon
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Automatic Frequency-Tracking Control for Ultrasound Welding System

Advanced Materials Research, 2011
A new frequency-tracking control method to catch the optimal working frequency for the high power ultrasonic welding system is proposed. In a high power ultrasonic resonant system, the induced high temperature will change the working frequency. Therefore, the proposed control method to track the optimal working frequency becomes very attractive and ...
Kao Feng Yarn, King Kung Wu, Kai Hsing Ma, Wen Chung Chang   +3 more
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Crystal Frequency Control of Automatic Direction Finders

SAE Technical Paper Series, 1968
<div class="htmlview paragraph">From the pilot-navigator's viewpoint, there have been insignificant improvements in the automatic direction finder (ADF) since World War II. While new navigation aids have been developed with digital frequency selection, tuning of the ADF has remained a “coffee grinder” operation.</div> <div class ...
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Load frequency control and automatic generation control using fractional-order controllers

Electrical Engineering, 2010
Recently, fractional calculus has received extensive attention and research. Accordingly, there is an increasing interest in fractional-order (FO) dynamic systems and controllers. The widely used classical integer-order proportional-integral controller and proportional-integral-derivative controller are usually adopted in the load frequency control ...
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Automatic Generation Control and Load Frequency Control: A Comprehensive Review

2019
In this paper, a comprehensive literature survey has been done on various control techniques of load frequency control (LFC). This research paper reveals the basic studies of the control techniques used in load frequency control to generate and hand over an electric power in an interconnected power system as effectively and accurately as possible while
Krishan Arora, Ashok Kumar, Vikram Kumar Kamboj   +2 more
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