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Power Quality in the Distributed network is poor due to heavy use of semiconductor devices like fluorescent lamps, computers, mobile chargers and automatic devices particularly in home and small offices. Harmonics are developed due to these devices which have adverse impacts on power system. Life of the appliance is also decreased due to presence of harmonics in power. Active power filter for single...
Use of power electronic devices creates the power quality issues by generating harmonics and reactive power in the utility system. Active power filter is one of the best solution to reduce the harmonics level in the system. In this paper single phase shunt active filter using sliding mode control is implemented in MATLAB/Simulink. Sliding mode controller acts as a current controller to control filter...
This paper presents a five-level cascaded multilevel Voltage Source Inverter (VSI) based shunt active filter for Power Line Conditioners (PLC) to improve power quality. The reference current extraction is based on sensing main currents that are multiplied with estimated peak reference current. The proposed approach comprises Low Pass Filter (LPF) in conjunction with Proportional Integral (PI) controller...
Planar busbars have played a significant role in reducing the parasitic/stray inductance in modern high power converters, which is caused by physical current path loop from the IGBT to DC capacitors. Consequently, it may lead to such problems as non-ideal converter operation, over-voltages, voltage drop, current unbalance and resonance with DC capacitors as well as snubber capacitors, especially applied...
This paper presents a fast technique to generate the current reference to compensate for the harmonics and reactive power in a shunt type active power filter (APF). A voltage source inverter (VSI) is operated in the current controlled mode for this purpose. For fast generation of the reference current in the APF, the DC link voltage of the VSI is always sensed and an initial estimate is derived through...
This manuscript is aimed to differentiate the role of DC capacitor in voltage source inverter based active power line conditioning (APLC) system. To achieve this objective, a single six-pulse converter and three-phase parallel converters with different firing angles have been chosen as the load. A novel control circuit based on instantaneous p-q theory has been proposed to determine the compensation...
In this paper, a fast and simple technique to generate the current reference to compensate for the harmonics and reactive power in a shunt type active power filter (APF) is developed. A voltage source inverter (VSI) is operated in the current controlled mode for this purpose. For fast generation of the reference current in the APF, the dc link voltage of the VSI is always sensed and an initial estimate...
This paper presents a model-based controller for a hybrid power filter to reduce the current harmonic distortion in a three-phase power system in the general case of unbalanced and distorted source voltages and load currents. The hybrid power filter topology considered is composed of an active filter connected to the grid by means of an LC passive filter. The aim of this topology is to reduce the...
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