A novel control scheme for Series Hybrid Active Power Filter for mitigating source voltage unbalance and current harmonics

2012 ◽  
Author(s):  
M.A. Mulla ◽  
R. Chudamani ◽  
A. Chowdhury
Keyword(s):  
Active Power Filter ◽  
Active Power ◽  
Current Harmonics ◽  
Voltage Unbalance ◽  
Power Filter ◽  
Hybrid Active Power Filter ◽  
Control Scheme ◽  
Source Voltage

scholarly journals Source current harmonic mitigation of distorted voltage source by using shunt active power filter

2020 ◽  
Vol 10 (4) ◽  
pp. 3967
Author(s):  
Muhammad Ossama Mahmoud ◽  
Wael Mamdouh ◽  
Hamdy Khalil
Keyword(s):  
Input Signal ◽  
Active Power Filter ◽  
Active Power ◽  
Control Circuit ◽  
Voltage Source ◽  
Shunt Active Power Filter ◽  
Current Harmonics ◽  
Power Filter ◽  
Source Current ◽  
Source Voltage

In this paper, three-phase, four-wire shunt active power filter (SAPF) is utilized to mitigate system harmonics of distorted voltage source for unbalanced and nonlinear loads. Basically, the source voltage should be pure sinusoidal waveform to get a good mitigation of source current harmonics. In this under study system, the source voltage is assumed to be harmonic distortion non-sinusoidal voltage source. The phase locked loop (PLL) control circuit is wielded for extracting the fundamental component of the distorted source voltage to use it as an input signal to the SAPF control. Another input signal to the SAPF is the distorted load current. The SAPF control system uses (p-q) theory to calculate the optimum instantaneous current to be injected by the SAPF to mitigate the source current harmonics even the source voltage is harmonic distorted. MATLAB/SIMULINK software package is utilized to simulate the system under study. The effect of SAPF is tested when it’s used with and without the PLL control circuit. The simulation results show that, the THD of source current when using the PLL control circuit is improved to comply with the harmonic limits given in the IEEE 519-1992 and IEC 61000-4-7 standards.

Simulation of Novel Three-Level Shunt Active Power Filter

2012 ◽  
Vol 195-196 ◽  
pp. 748-753
Author(s):  
Xing Gang Li ◽  
Ren Yong Feng ◽  
Hai Zhen Kang ◽  
Zhi Guo Shi
Keyword(s):  
Dynamic Balance ◽  
Current Source ◽  
Active Power Filter ◽  
Active Power ◽  
Nonlinear Loads ◽  
Shunt Active Power Filter ◽  
Current Harmonics ◽  
Power Filter ◽  
Control Scheme ◽  
And Control

A new topology of shunt active power filter with two-leg three-level clamped capacitor in the main circuit is presented, and the operation principle and control scheme are introduced. The adopted device is operated as a controllable current source to eliminate current harmonics. The new hysteretic current comparison control scheme is used to track the command current and to balance the neutral-point voltage. Meanwhile the redundant operating states in the adopted inverter can be selected to compensate the clamped capacitor voltage to achieve the dynamic balance of the capacity voltage. Simulation results show that the shunt active power filter can effectively eliminate harmonics of the nonlinear loads.

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