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PID controller has been frequently applied to various application areas because of mathematical definition and overall performance which is greatly depended on accuracy of the control parameters. Therefore, conventional and evolutionary algorithms have introduced to find these parameters as tuning methods. In present evolutionary algorithms have frequently used in PID tuning applications. However,...
By increasing electric power demand, powers systems can reach stress conditions, resulting in undesirable voltage and frequency condition. Nowadays It is well recognized that by applying the flexible AC transmission system (FACTS) controllers, the stability limits can be enhanced significantly. In this paper an optimized self tuning fuzzy PI controller (STFPIC) is proposed for the UPFC to improve...
In this paper, the self-tuning PID control law based on generalized minimum variance control law is applied for DC-DC converter circuit. Control performance is ascertained self tuning law better than fixed parameter when system changed. In this instance, lambda, design parameter set from the start. But, challenges for the future can be able to handle auto-tuning of control weighting factor.
This paper presents a new power regulation method for contactless power transfer systems that combines current magnitude control of a series tuned resonant converter with energy injection concepts suitable for constant load or single pick-up applications. In the latter, the control of the primary converter operates with asymmetrical control, to regulate the magnitude of the high frequency primary...
This paper discusses the self-tuning capabilities of an analog current-mode controller for switch-mode DC-DC converters. The proposed tuning techniques are based on the insertion of non-linear blocks in the analog control loop and the generation of a controlled oscillation on the output voltage in order to measure the closed-loop properties like gain margin, phase margin and crossover frequency and...
Traditional tuning techniques like modulus optimum or symmetrical optimum can be applied to the design of control loops for many power electronic applications. When directly implemented in digital control systems, this will lead to reduced stability margins since the sampling effects are not taken into account for the controller design. This paper is investigating a method for obtaining discrete time...
A delay-locked loop of multi-band selector with wide-locking range and low power dissipation is presented. The architecture of the proposed delay-locked loop consists of phase frequency detector, charge pump, band selector, multi-control delay line, and start-up circuit. The multi-band selector is used to extend operation frequency of delay-locked loop by switching the multi-control delay line. The...
An adaptive-step-size auto-tuning algorithm and controller for power converters' switching frequency optimization with improved convergence performance is presented in this paper. The controller automatically tracks and determines the switching frequency of a power converter in order to achieve the highest power conversion efficiency under variable operating conditions including temperature variation...
In this paper, two different control methods on DC-DC converter, are compared with together. These converters, are used for the stabilization or the control of DC voltage of a battery. In addition to other applications, DC converters feed electric vehicles (trucks, electric vehicles, and subway locomotives), telephone sets and civil inverters. Lately, improvement the performance of the DC-DC converter,...
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