Voltage flicker problems have long existed in several of the distribution areas served by the Taiwan Power Company. In the past, those research results indicating that the estimated 10 V Δ value based on the conventional method is significantly smaller than the survey value. This paper is used to study the relationship between the voltage flicker problems and harmonic power variation for the po...

The connection of wind turbines to the distribution networks may affect the voltage quality offered to the consumers. One of the factors contributing to this effect are the rapid variations of the wind turbine output power, which cause respective fluctuations in the supply voltage, referred to as flicker. This paper presents a neural network based model for wind turbine flicker emission calcula...

This work investigates a novel pulsating DC high-voltage linear driving scheme for GaN-based Light-emitting diode (GaN LED) general lighting to save costs and alleviate flicker. The superiority practicality of this in three-phase AC power grids were demonstrated the first time. Compared applications single-phase grids, GaN LEDs can provide superior performance lighting. component rectified volt...

Abstract: This paper puts forward a new method based on Hilbert-Huang Transform (HHT) and Wavelet denoising for extracting feature information of voltage flicker signal. Firstly, envelope signal could be extracted by using HHT from original signal containing noises. Then the noises and higher harmonic components of envelope signal could be removed by using Wavelet denoising. Finally, the noise-...

A new instrument for the evaluation of disturbances caused by variations in lamp voltage (light flicker) is proposed, based on light intensity measurements. Unlike current standard (IEC EN 61000-4-15), which determines flicker severity by filtering powering voltage measurements with a standard lamp model (230V/60W), the presented methodology includes the lamp itself in the measurement process, ...

This paper proposes an on-line neural network based Distributed Static Compensator (DSTATCOM) for a three-phase, three-wire grid connected distribution system to mitigate the voltage flicker. The technique is based on instantaneous tracking of the voltage envelope and phase angle using online neural network based estimator. These estimated values are used by neural controllers to compute inputs...

A novel method to mitigate voltage flicker problem usually caused by DC Arc Furnaces has been presented in this paper. This method called Direct Current Ripple Re-injection is applied to a multi-step switching reactor in the output of the AC/DC converter to make the output load current as smoother as possible. This method would lessen harmonic effects properly. The proposed approach is simulate...

Wind-energy systems cause fluctuations more than any other sources and hence, voltage fluctuations are expected with these units. This paper addresses the problem of voltage fluctuation caused by doubly fed induction generators (DFIG)-based variable-speed wind turbines. Flicker emission of these units is investigated during continuous operation. The effects of grid strength, angle of grid imped...

In allusion to harmonic and voltage flicker in microgrid, the local mean decomposition algorithm is adopted to analyze harmonic and voltage flicker in power system. Complex original signals can be decomposed into a number of PF (product function) component, each layer of PF is composed of the envelope signal and frequency modulation function, which contains all the instantaneous amplitude and i...

In this paper, we present problems connected with voltage fluctuations in low-voltage networks caused by small PV sources installed an LV network. For the purpose of analysis, high-resolution data gathered at output real for 4 months 2 locations are used. Data processed to analyze impact different network parameters on and flicker. The resulting values flicker given so assessment can be made be...