scholarly journals Control System Design of Shunt Active Power Filter Based on Active Disturbance Rejection and Repetitive Control Techniques

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Le Ge ◽  
Xiaodong Yuan ◽  
Zhong Yang
Keyword(s):  
Control System ◽  
Disturbance Rejection ◽  
Repetitive Control ◽  
Active Power Filter ◽  
Active Power ◽  
Current Control ◽  
Current Loop ◽  
Power Filter ◽  
Active Disturbance Rejection ◽  
Unknown Disturbance

To rely on joint active disturbance rejection control (ADRC) and repetitive control (RC), in this paper, a compound control law for active power filter (APF) current control system is proposed. According to the theory of ADRC, the uncertainties in the model and from the circumstance outside are considered as the unknown disturbance to the system. The extended state observer can evaluate the unknown disturbance. Next, RC is introduced into current loop to improve the steady characteristics. The ADRC is used to get a good dynamic performance, and RC is used to get a good static performance. A good simulation result is got through choosing and changing the parameters, and the feasibility, adaptability, and robustness of the control are testified by this result.

ON USING LINEAR PERIODICALLY RESETTING FILTER IN CURRENT CONTROL LOOP FOR ACTIVE POWER FILTER

2006 ◽  
Vol 15 (04) ◽  
pp. 615-639 ◽  
Author(s):  
LIDAN ZHOU ◽  
MUHAMMAD MANSOOR KHAN ◽  
FEIFENG JI ◽  
GANG YAO ◽  
DA XIE ◽  
...  
Keyword(s):  
Digital Signal Processor ◽  
Parallel Implementation ◽  
Active Power Filter ◽  
Digital Signal ◽  
High Gain ◽  
Active Power ◽  
Current Control ◽  
Control Technique ◽  
Current Loop ◽  
Power Filter

Among linear control techniques, deadbeat control has been widely accepted as a feasible current control technique as far as the digital signal processor (DSP) implementation of active power filter (APF) is concerned. This control technique uses high gain on the error measured at one sample, to control the error ideally to zero by the next sample. The high gain makes the control very sensitive to any error or noise in the measurements, which is always there in electrical systems. Especially, the periodic noise in parallel implementation of an inverter or APF demands a higher order filter at the current transducer output, which affects the dynamic response of the system. Recently, few papers have reported the results about the use of linear periodically resetting integrators (LPRI) as filter in some electronic applications. This paper is an attempt to generalize the idea of LPRI and here we introduce the notion of linear periodically resetting filter (LPRF). The frequency characteristics of an LPRF are analyzed. Possible application of these filters in current control is studied. It is shown that these filters can be adopted to improve the performances of a current loop in APF.

Takagi-Sugeno Fuzzy Control and Lyapunov-Based Stability Control of the Single-Phase Shunt Active Power Filter

2013 ◽  
Vol 433-435 ◽  
pp. 1206-1209
Author(s):  
Lan Fang Li ◽  
Wei Ming Guo ◽  
Bai Yu Xu ◽  
Ming Ma
Keyword(s):  
Control System ◽  
Fuzzy Control ◽  
Active Power Filter ◽  
Stability Control ◽  
Active Power ◽  
Current Control ◽  
System Stability ◽  
Power Filter ◽  
Takagi Sugeno ◽  
Control Accuracy

In allusion to the difficulty of achieving accurate mathematical model of active power filter (APF), the Takagi-Sugeno (TS) fuzzy control is led into DC voltage control of APF. To solve the problem of control system stability, the control approach based on Lyapunov stability theory is applied to the current control. Both methods can ensure the control accuracy and stability. By means of adaptive fuzzy neural system in Matlab/Simulink the parameters of TS fuzzy controller are optimized and experiments are performed. Results show that under the time-varying load and variation of power system parameters both robustness and control accuracy of the control system can be ensured by the proposed control method.

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