A voltage flicker severity analysis module for multiple electric arc furnace operation

Abstract

Electric arc furnaces (EAF) are very large electrical loads and they cause voltage flicker problem in the power system due to their non-linear and random electrical characteristics. Voltage flicker (cyclic and stochastic) causes annoying sensation experienced by human eye and is a very important power quality parameter. In this paper, a MatlabSimulink based flicker severity analysis module has been proposed to analyse voltage flicker in the network under multiple EAF operation fed from a substation. In this module a new system-modelling strategy is proposed. The power system is modelled and simulated in Simulink and instantaneous voltage data is analysed by a separate Matlab program. With this module, a power system containing two parallel EAFs is modelled and simulated and the short-term flicker severity index of voltage at point of common coupling is calculated. This new module can be used very effectively to estimate the flicker of any system having multiple arc furnaces that are fed from a substation.Index Terms-Electric arc furnace, voltage flicker, power quality, short term flicker severity

Identification of harmonic source location in power distribution network

“…As a result, it is critical for a power system operator to understand the system's harmonic behavior [11]- [13]. As mentioned in [14]- [18], harmonic sources, on the other hand, have complicated properties such as nonlinearity and abrupt variations that are difficult to forecast using standard methods the foremost common circumstance that needs harmonic source location is to settle the disputes over who is responsible for harmonic distortions, whether it comes upstream or downstream of the point of common coupling (PCC) [19]- [21].…”

An Analysis of Harmonic and Interharmonic Contribution of Electric Arc Furnace by Using Periodogram

“…These variations root of flicker and harmonic problems at the PCC [11]. The generated harmonics also contributed to the conductor overheating, capacitor bank failures and breakdown of electronic system [12]. Therefore, a modelling and analysis of harmonic components that caused by EAF is crucial due to study the characteristics and to solve the problems concerning to EAF [13].…”