In this paper, non-carrier based digital switching functions and patterns are developed using VHDL language (DSFPV).Non-Carrier based switching angle method is selected for the reduced distortion characteristics. Different methods of switching angle methods like equal phase method, half equal phase method, half height method and feed forward method are designed and developed using VHDL coding. ...

• The circuit used for the phase angle control in triac-based single-phase ac regulators (ac to ac voltage converters) • The operation of the various blocks used in the circuit, along with the waveforms • The harmonic analysis of the output voltage of a single-phase ac regulator with resistive load

This article proposes a fast and robust technique for instantaneous phase angle estimation of three-phase voltage systems under unbalanced distorted conditions. It mainly relies on the Clarke transformation, Teager energy operator, delayed signal cancellation (DSC) approach. Unlike an adaptive DSC-based synchronous-reference frame phase-locked loop (PLL), proposed avoids interdependent loops, t...

Purpose – The aim of this paper is to optimize the capacitor value of a single phase open well submersible motor operating under extreme voltage conditions using fuzzy logic optimization technique and compared with no-load volt-ampere method. This is done by keeping the displacement angle (α) between main winding and auxiliary winding near 90, phase angle (φ) between the supply voltage and line...

In this paper, a comparative study of modified phase-angle, extinction-angle, and pulse width modulation control techniques for the purpose of power factor improvement of single-phase AC-AC voltage regulators have been illustrated as applied to a singlephase ac voltage converter by an example of the widely used single-phase induction motor as a dynamic load. Observations on power factor, displa...

The interline power flow controller (IPFC) is a concept of the FACTS controller for series compensation which can inject a voltage with controllable magnitude and phase angle among multi lines. This paper proposes a novel IPFC-Based Damping Neuro-control scheme using PSO for damping oscil‌la‌t‌i‌o‌ns in a power system to improve power system stability. The add‌i‌tion of a supplementary controll...

A grid connected inverter usually requires voltage and current measurements to control the active and reactive powers as well as the inverter output currents. While voltage sensors are essential to obtain reliable information on the phase angle, these additional components certainly increase the production costs and complexity. In this paper, a voltage-sensorless control scheme for a grid conne...

Voltage sags caused by the short-circuit faults in transmission and distribution lines have become one of the most important power quality problems facing industrial customers and utilities. Voltage sags are normally described by characteristics of both magnitude and duration, but phaseangle jump should be taken into account in identifying sag phenomena and finding their solutions. In this pape...

Voltage sag compensator is very important in power quality. Its performance also depends on the types of sag detection techniques used. Sag detection technique determines the dynamic performance of a voltage-sag compensator. Many techniques have been introduced to measure and to detect voltage sag, such as RMS-Value Evaluation and Peak-Value Evaluation. Unfortunately, most of the techniques req...