In this paper presents a fast new PI controlled DSTATCOM used to compensate for harmonic distortion in threephase system. The DSTATCOM employs a simple Method for the calculation of the reference compensation current based. The presented DSTATCOM is able to operate in balanced, unbalanced and Variable load conditions. Classic filters may not have satisfactory performance in fast varying conditi...

A comparative study between the topologies consisting of the Conventional Electronic Load Controller and the Proposed Electronic Load controller (ELC)has been carried out in this paper for the power Quality Improvement in a conventional Electronic Load controller used for Isolated pico-hydropower generation using Asynchronous generator (AG). A polygon wound autotransformer with reduced Kilo Vol...

This paper describes the mathematical modelling of selfexcited induction generators (SEIGs) with are improved electronic load controller (IELC) for microhydel applications supplying variety of loads. In small hydro plants, governor unit of turbine can be eliminated using IELC, which is simple and cost effective. The improved electronic load controller is a combination of a three-phase insulated...

This paper describes a novel fuzzy logic controller for a three phase shunt active shunt filter for the power quality improvement. The Power Quality (PQ) problems in power distribution systems are not new but only recently the effects of these problems have gained public awareness. These non-linear loads are constructed by nonlinear devices in which the current is not proportional to the applie...

With the rapid developments and use of non linear loads, the controlling over the harmonic current to get and maintain power quality is becoming more important. Active power filters has been used to compensate the harmonic pollution in our power system. This paper presents a efficient model to compensate the current harmonics using the inverter based Shunt Active Power Filter, Passive Power Fil...

This paper presents design consideration and analysis for an interleaved boundary conduction mode power factor correction buck converter. A thorough analysis on the harmonic content of the AC line current is presented to examine the allowable voltage gain (K value) for meeting EN61000-3-2, Class D while maximizing the efficiency. Results of the harmonic analysis are used to derive the required ...

Previous work has attempted to find satisfactory methods for the allocation of harmonic current emission MV subsystems containing long feeders. It has been proposed that best use of the network's harmonic absorption capacity is made if the allocated current varies with the inverse square root of the harmonic impedance at the point of connection. It has been shown that an exact solution followin...

In the oilfield development stage, more recoverable reserves can be found by using the more sophisticated seismic methods with stimulation. Threecomponent seismic exploration technology comes into being, and it is becoming a major oil exploration seismic technology currently. As the sensitive element of seismic geophone, the performance of the harmonic oscillator is vitally important to the ent...

This paper presents a fuzzy logic, PI, average current controlled shunt active power filter used to compensate for harmonic distortion in three-phase four-wire systems. The shunt active filter employs a simple method for the calculation of the reference compensation current based on Fast Fourier Transform. The presented Shunt Active Power filter is able to operate in balanced, unbalanced and Va...

Recent advance of real-time audio/video transcoding technology enables streaming servers to manage the constrained network-I/O bandwidth available to the Internet at a fine-grained level. In this article, we propose a bandwidth allocation mechanism for differentiated services (DiffServ) on the streaming servers. It aims to deliver high bit rate streams to high priority requests without overcomp...