–With the widespread use of harmonic generating devices, the control of harmonic currents to maintain a high level of power quality is becoming increasingly important. An effective way for harmonic suppression is the harmonic compensation by using active power filter. This paper presents a comprehensive survey of DSTATCOM control strategies put forward recently. It is aimed at providing a broad...

This paper, electronic resonant ballast for a small photovoltaic powered street lighting system in remote rural area was proposed. The street lighting system was designed for rural area where the electrical transmission line cannot be commonly serviced and it is the cascade systems of the solar arrays, switching battery charger, and electronics ballast with small fluorescent lamp. The ballast i...

Usually, harmonics are the base point when engineers start to analyze waveform distortion. Frequencies of these voltage and current waveforms are integer multipliers of the base frequency of power system (50 Hz or 60 Hz). If it is not the case then these are named as intermediate harmonics. The sinusoidal waveforms of voltage characterize the ideal power system with the highest clarity of base ...

The estimation of harmonic components of power voltage signals is one of the measurements prescribed by the power quality (PQ) standards (IEC 61000-4-30, 2008). In general, the harmonic components originate from non-linear elements connected to the power system such as non-linear loads (e.g., switched-mode power supplies) or transformers. An example of a distorted voltage measured in an office ...

A simple interferometric method is described to measure the time-dependent deformation of piezoelectric bimorphs driven by ac voltage. Applying this method to a bimorph assembly used to measure viscoelastic forces in a surface forces apparatus, we find that a sinusoidal-shaped harmonic drive voltage generates sinusoidal deformation but that a triangular-shaped harmonic drive voltage fails to pr...

Presence of distributed generation (DG) in distribution systems has significant impacts on the operational characteristics of these systems, also using capacitor for reactive compensation and loss reduction is so common. Injected harmonic currents from nonlinear loads into distribution system distort all of voltages and currents and must be considered when placing the capacitor banks so that th...

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 ...

The firing angle control of thyristor full wave ac-dc converters to set the desired DC bus voltage in Uninterruptible Power Supply (UPS) systems have drawbacks of pulsating input current, high harmonic content, low pf, low efficiency and large size of inductors and filters. International standards impose several constraints concerning the electric power quality and harmonic content of the line ...

This project aims to design and implementation of high efficiency and high step –up non-isolated DC-DC converter. The high power non –linear loads and low power loads produce voltage fluctuations, harmonic currents and an imbalance in network which results into lower Power factor operation of power supply. There is a need of improved Power factor and reduced harmonic current in input line. In t...

This paper proposes a novel modulation technique applying in multilevel voltage source converters suitable for high voltage power supplies and flexible ac transmission system (FACTS) devices. The proposed technique can generate output stepped-waveforms with a wide range of modulation indexes and minimized total voltage harmonic distortion. 'The main power devices switch only one time per cycle,...