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In this paper Enhanced Phase Locked Loop (EPLL) based Shunt Active Power Filter is discussed. The performance of EPLL based system is tested under balanced and unbalanced load conditions. The EPLL is used to extract the magnitude and phase of required frequency component from input signal. The method is used in shunt active power filters to eliminate harmonics, improve power factor and correct the...
In this paper the shunt active power filter (SAPF) under varying harmonic conditions is considered. The control technique used for reference current generation consists of Goertzel algorithm. The Goertzel Algorithm calculates the fundamental component of load current under non sinusoidal conditions with high speed and accuracy of response. The variation in harmonics is realized by changing the firing...
A new topology is proposed here to compensate voltage sags in power systems. One of the major power quality issues encountered by industries is the voltage sag. To compensate sag, a new topology is designed without storage device. This sag adjuster is capable of compensating deep and long duration voltage sag. The sag adjuster of each phase derives power from other two phases. The sag occurring in...
Modern active power filters are capable to compensate high order harmonics (typically, the 25th) dynamically. Even though, shunt active power filter maintains source current nearly sinusoidal, considerable distortion is observed in source current due the presence of high order harmonics (greater than 25th). A passive high pass filter is used to filter out these harmonics. The design procedure of these...
In this paper we have shown a method by which we can determine the relationship between the time constant of the current ramp by the device and the corresponding ground and power noise of any silicon device, for a given Power Delivery network. This relationship can be used for statistical analysis of the power delivery network.
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