An Improved Phase Shift Modulation Method for Cascade Active Power Filter with Low Switching Frequency

2011 ◽  
pp. 233-242
Author(s):  
Congzhe Gao ◽  
Xinjian Jiang ◽  
Yongdong Li ◽  
Junling Chen
Keyword(s):  
Phase Shift ◽  
Active Power Filter ◽  
Active Power ◽  
Modulation Method ◽  
Switching Frequency ◽  
Power Filter

Application of Slipped-Window Integrator and Repetitive Predictor in APF

2014 ◽  
Vol 556-562 ◽  
pp. 3585-3589
Author(s):  
Meng Qiong Wang ◽  
Chun Yu Xu
Keyword(s):  
Tracking Control ◽  
Pulse Width Modulation ◽  
Time Lag ◽  
Active Power Filter ◽  
Active Power ◽  
Modulation Method ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Power Filter ◽  
Low Pass

In view of the shortages time lag existing in traditional digital low-pass filter in Active Power Filter (Active Power Filter, APF), this paper proposes to adopt slipped-window integrator to realize low-pass filter in harmonic current detection.The current tracking control uses Space Vector Pulse Width Modulation method. Meanwhile, the repetitive predictor is applied so as to improve the real-time performance of the compensation current tracking control. Built a three-phase shunt active power filter simulation model in Matlab/Simulink environment and take experiment under the low pressure condition. The results show that slipped-window integrator and deadbeat current mothod can acquire good dynamic response performance as well as high precision.

A Novel Three-Phase Current Source Active Power Filter

2014 ◽  
Vol 667 ◽  
pp. 383-389
Author(s):  
Yu Xiong ◽  
Yu Ling Li ◽  
Yan Ping Guo ◽  
Bo Yang
Keyword(s):  
High Power ◽  
Current Source ◽  
Active Power Filter ◽  
Active Power ◽  
Switching Frequency ◽  
Current Harmonic ◽  
Power Filter ◽  
High Switching Frequency ◽  
Harmonic Components ◽  
And Control

A novel topology for efficient utilization of parallel inverters as current source active power filter (APF) for high-power applications is presented and analyzed. The proposed technique operates the master inverter with high-power low-switching-frequency devices to compensate the low-order large-amplitude current harmonic components and the slave inverter with low-power high-switching-frequency devices to compensate the high-order small-amplitude current harmonic components. This paper discusses the operating principle, main circuit and control system design. Simulation and experimental results are provided to demonstrate the viability of the scheme.

A New Hysteresis Current Control Method for Active Power Filter with Lower Switching Losses

2014 ◽  
Vol 1030-1032 ◽  
pp. 1423-1431
Author(s):  
Jiang Zeng ◽  
Li Peng Huang
Keyword(s):  
Control Method ◽  
Active Power Filter ◽  
Active Power ◽  
Current Control ◽  
Band Width ◽  
Switching Frequency ◽  
Hysteresis Current Control ◽  
Power Filter ◽  
Switching Losses ◽  
Control Precision

This paper presents a new hysteresis current control method for APF(active power filter) that can reduce switching losses effectively by means of adjusting the hysteresis band width according to the current size. On one hand, this method adjust the overall hysteresis band width according to the size of absolute norm of three-phase current that optimize the overall switching frequency, reduce the total switching losses effectively. On the other hand, it adjust hysteresis band width of each phase by comparing the output reference current to reduce the switching times which switching losses is larger, while increasing the switching frequency which switching losses is smaller, so as to maintain overall control precision. Computer simulation is conducted on an electromagnetic transient program. The results show that the new method can effectively reduce the switching losses under the same control accuracy and total switching frequency.

Real Time Harmonic Mitigation Using Fuzzy Based Highly Reliable Three Dual-Buck Full-Bridge APF for Dynamic Unbalanced Load

2018 ◽  
Vol 19 (3) ◽  
Author(s):  
Ranjeeta Patel ◽  
Anup Kumar Panda
Keyword(s):  
Distribution System ◽  
Single Phase ◽  
Dynamic Performance ◽  
Active Power Filter ◽  
Active Power ◽  
Voltage Source ◽  
Switching Frequency ◽  
Shunt Active Power Filter ◽  
Power Filter ◽  
Inverter Circuit

Abstract This study presents a highly reliable 3-phase 4-wire, three dual-buck full-bridge shunt active power filter (3 DB FB APF) for distribution system. The proposed topology uses three single phase dual buck full bridge inverter sharing the same dc-link capacitor with high utilization of dc-bus voltage. The dual buck inverter circuit composed of one power switch and one diode leg instead of two power switches conventional inverter leg effectually eliminate the undesirable “shoot-through” phenomenon occurs in conventional inverter circuit. The fuzzy and adaptive hysteresis current controller based id-iq control strategy has been adopted to generate optimized switching frequency. For validation, the proposed topology is implemented in the OPAL-RT LAB using OP5142-Spartan 3 FPGA. The dynamic performance of the proposed 3 DB FB APF is assessed for sinusoidal, unbalanced and non-sinusoidal voltage source condition with unbalanced non-linear load that is when both three-phase and single-phase loads are present in the system. Besides, the results with proportional-integral (PI) controller are compared with FLC in terms of harmonic compensation. Furthermore, a comparison has been made between split capacitor dual buck half bridge active power filter (2C DB HB APF) and proposed 3 DB FB APF based on switch power rating.

scholarly journals Harmonic Reduction of Shunt Active Power Filter using SVPWM

2019 ◽  
Vol 8 (2S8) ◽  
pp. 1183-1188
Keyword(s):  
Reactive Power ◽  
Harmonic Distortion ◽  
Active Power Filter ◽  
Active Power ◽  
Fine Tuning ◽  
Switching Frequency ◽  
Nonlinear Loads ◽  
Large Power ◽  
Power Filter ◽  
Passive Filters

waveforms of voltage and current are distorted and requirement of reactive power increase due to developing use of non-linear and time-varying loads. Harmonic distortion is recognized to be sources of a number of problems, such as increase in power losses, unnecessary heating, harmonic resonances in the utility, communication obstruction, flash and clear noise, inaccurate operation of susceptible loads [1, 2]. Conventionally, LC tuned passive filters absorb generated vocal currents due to nonlinear loads. Their primary benefit is more reliability with reduced cost. However, passive filters have a number of demerits like which may be the source of harmonic interface with the utility system, in the existence of inflexible value of fine-tuning LC filter is necessary and could not meet the predetermined harmonic current restrictions [3, 4]. This gives the inspiration to the exploration of an active power filter methodology, which is sensibly viable, cost valuable and can gather the suggested standard for large power nonlinear loads. Due to the high rating and large switching-frequency constraint of the Pulse Width Modulation (PWM) inverters are used for high-power applications

Sign in / Sign up

Export Citation Format

Share Document