A new control method for shunt active filters based on sinusoidal signal integrators

2011 ◽  
Author(s):  
Ebrahim Babaei ◽  
Majid Yavari ◽  
Seyed Hossein Hosseini
Keyword(s):  
Control Method ◽  
Active Filters ◽  
Sinusoidal Signal

Shunt power electronic buffer as active filter and energy flow controller

2013 ◽  
Vol 62 (1) ◽  
pp. 55-75 ◽  
Author(s):  
Andrzej Szromba
Keyword(s):  
Energy Flow ◽  
Control Method ◽  
Active Filters ◽  
Power Electronic ◽  
Supply Source ◽  
Shunt Active Power Filter ◽  
Power Filter ◽  
Source Current ◽  
Source Of Information ◽  
Variable Energy

Abstract The considered shunt active power filter can be controlled not only to compensate non-active current in the supply source, but additionally to optimize energy flow between the source and the load. In such a case the filter shapes the source current to be active and simultaneously regulates its magnitude. The presented filter/buffer can operate properly even when the load contains AC or DC variable energy source of any characteristic. The device can optimize energy flow for a single load, but also for a group of loads as well. The distinctive feature of the employed control method of the filter/buffer is that certain changes of energy stored in the device are utilized as the source of information concerning the active current of the load. This control method is very flexible and can be implemented to nearly all structures of active filters, for DC, single- and multiphase circuits.

Controlling Chaotic Dual-Ring Erbium-Doped Fiber Laser by Modulating or Shifting the Loss

2018 ◽  
Vol 876 ◽  
pp. 147-151
Author(s):  
Sen Lin Yan
Keyword(s):  
Fiber Laser ◽  
Chaos Control ◽  
Control Method ◽  
Sinusoidal Signal ◽  
Periodic Signal ◽  
Period 2 ◽  
Periodic State ◽  
Erbium Doped ◽  
Different Levels ◽  
Dual Ring

Controlling chaotic dual-ring erbium-doped fiber laser and the produced dynamics are studied by modulating or shifting the laser loss while the control model is presented to pressure behavior of the laser to a periodic state or multi-periodic states by a periodic signal perturbing or shifting the loss. When the loss of one ring of the laser is modulated via a sinusoidal signal, chaotic behaviors of the dual-ring can be pressured in two single-periodic states while two rings emit cyclic pulses. It indicates that chaotic dual-ring erbium-doped fiber laser is effectively controlled. When another sinusoidal signal is taken to perform on the loss, the laser can be educe to present a period-2 or period-3 state. When the loss is shifted between two different levels, the dual-ring can be deduced to a period-4, a period-6 and other multi-periodic state. The results indicate that controlling chaotic dual-ring erbium-doped fiber laser can be realized via the chaos-control method.

scholarly journals Four-leg active power filter control with SUI-PI controller

2021 ◽  
Vol 11 (4) ◽  
pp. 2768
Author(s):  
Mohamed M. El-sotouhy ◽  
Ahmed A. Mansour ◽  
Mostafa I. Marei ◽  
Aziza M. Zaki ◽  
Ahmed A. EL-Sattar
Keyword(s):  
Reactive Power ◽  
Control Method ◽  
Current Source ◽  
Active Power Filter ◽  
Industrial Applications ◽  
Active Power ◽  
Active Filter ◽  
Active Filters ◽  
Power Filter ◽  
Non Linear

<span>Four-leg active power filter is considered one of the greatest vital active filters that are frequently used in industrial applications, especially those that need to be controlled in each individual phase. Also, to control the neutral current that created because of a lot of unbalanced and non-linear loads. In this paper, the used active filter was controlled by a proposed control method which can achieve simplicity and intelligence at the same time. The novelty of this paper is using the proposed controller with Four-leg active power filter. This controller relies on instantaneous reactive power theory, which used to create the required currents that are injected into the network via the used active filter to remove the problems created by unbalanced and non-linear loads. It is also maintained that the current source a pure sinusoidal wave. The system is implemented on MATLAB/Simulink. The simulation results proved the preference of the proposed controller than the conventional proportional-integration controller, where it reduced the percentage of total harmonic distortion for the current source<em><span lang="AR-SA" dir="RTL">.</span></em></span>

A Duty Cycle Adjustment Strategy for Embedded Boost Power Factor Correction

2013 ◽  
Vol 392 ◽  
pp. 682-686
Author(s):  
Lei Shi ◽  
Hong Kun He ◽  
Lin Bo Wang ◽  
Jin Jin Yang ◽  
Qian Ni Feng
Keyword(s):  
Power Factor ◽  
Duty Cycle ◽  
Control Method ◽  
Power Factor Correction ◽  
Input Voltage ◽  
Sinusoidal Signal ◽  
Input Current ◽  
Test Results ◽  
Adjustment Strategy ◽  
Sinusoidal Waveform

The embedded boost power factor correction (PFC), which is realized by a storable duty cycle control method, has been verified that it can achieve good performance when the input voltage is standard sinusoidal signal. But the input current can not keep the good sinusoidal waveform all the time when the amplitude of the input voltage changes. In order to solve the problem, this paper presents a duty cycle adjustment strategy for embedded boost power factor correction. This strategy can adjust the duty cycle data synchronously when the amplitude of the input voltage changes. Its test results show that the adjustment strategy can achieve better performance to make the input current follow the shape and phase of the input voltage. The proposed duty cycle adjustment strategy can get the embedded boost power factor correction more effective and practical.

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