Power quality has become an important factor in power systems. The main causes of a poor power quality are harmonic currents, poor power factor, supply-voltage variations, etc. To mitigate power quality problems, we have various equipments like active filter, passive filter, unified power flow controller and unified power quality conditioner etc. Among from them unified power quality conditione...

Quality of power is essential for all electrical systems towards their reliable operation. In specific voltage/current magnitude, frequency and waveforms are the key parameters that decide quality electric supply. Recently enormous nonlinear loads such as converters, inverters, variable drives, uninterrupted supply used in modern industrial sectors which leads to disturbance particular, harmoni...

We analyze and present an input gain-varying scheme for maximizing dynamic range in a well-known Gm–C bandpass filter by both minimizing noise for small input signals, and by achieving balanced swing levels at all filter nodes for large input signals. A micropower bandpass filter suitable for use in cochlear implants and other powerconstrained biomedical applications was implemented and tested ...

This paper deals with the performance, analysis of, operating principles of a new generation of power electronics based equipment called Distribution Static Compensator (D-STATCOM) aimed at enchancing the reliability, and quality of power flow in low voltage distribution network. The model is based on the Voltage Source Converter (VSC) principle. The D-STATCOM injects a current into the system ...

This paper presents a new Hybrid Filter for compensating voltage/current harmonic in Variable Frequency Drives (VFD). It is a combined system of Shunt Passive Filter (SPF) and a Series Active Filter (SAF) is a cost-effective and practical way of mitigating both current and voltage harmonics generated in a power system due to the presence of non-linear loads. In this paper a practical VFD system...

We analyze and present an input gain-varying scheme for maximizing dynamic range in a well-known Gm–C bandpass filter by both minimizing noise for small input signals, and by achieving balanced swing levels at all filter nodes for large input signals. A micropower bandpass filter suitable for use in cochlear implants and other powerconstrained biomedical applications was implemented and tested ...

In this paper,Hybrid power filer (HPF) six switch two leg inverter for improved harmonic campanstion. The praposed scheme is required to an other active filter with passive filter un luckily most of the HPF are have common drawback a most number of passive components or transformer. The HPF have small rated inverter and LC filter of this proposed method. HPF are connected to the grid with out a...

A current source converter (CSC) based shunt active power filter (APF) system is designed and implemented to suppress the amplification of low order harmonics at the medium voltage (MV) interface bus between the distribution and transmission systems. Four CSC based APF modules designed at 1.0 Kv are operated in parallel, and connected to the 31.5 kV MV bus via a specially designed coupling tran...

Mobile watermarking robust to geometrical distortions is still a great challenge. In mobile watermarking, efficient computation is necessary because mobile devices have very limited resources due to power consumption. In this paper, we propose a lowcomplexity geometrically resilient watermarking approach based on the optimal tradeoff circular harmonic function (OTCHF) correlation filter and the...