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Capacitor bank switching classification using scale selection continuous wavelet transform is an approach to develop power quality diagnostic feature to analyze the origin and possible cause of transient disturbance in the industry facility. The scale selection wavelet transform selectively perform continuous wavelet transform from scale 1 to scale 70 at the dilation interval of one per scale whereby...
Three phase multi pulse rectifier classification using scale selection wavelet and probabilistic neural network is presented in this paper. The scale selection wavelet selectively perform continuous wavelet transform on the desired scales, which are determined by the scale frequency relationship to precisely locate each harmonic center frequency for harmonic analysis. Thus, the continuous wavelet...
Stochastic assessment is a method to predict the severity and number of voltage sags at a bus of interest in the transmission network system. In this paper, an analytical technique using impedance matrix is developed to predict the voltage magnitudes due to balanced and unbalanced faults at unlimited buses in an electrical network. The proposed technique was applied to an IEEE 24-buses electrical...
Wind power generation as one of the most popular renewable energy applications is absorbing more and more attention all over the world. However, output power fluctuations of wind farm due to random variations of wind speed can cause network frequency and voltage flicker in power systems. The power quality consequently declines, particularly in an isolated power system such as the power system in a...
In recent years, the increase of non-linear loads in electrical power system has sparked the research in power quality issue. The shunt active power filter (SAPF) is a power electronic device which has been developed to improve power quality. The current control of shunt power filters is critical since poor control can reinforce existing harmonic problems. Various control strategies have been proposed...
This paper presents a battery powered switched reluctance motor (SRM) drive constructed using two three-phase intelligent power modules (IPMs). It possesses integrated driving and charging capabilities. In driving mode, five legs of the two IPMs are used to form the SRM modified Miller converter, and the front-end DC/DC boost converter is constructed by the remaining leg. Proper current and speed...
At Shinkansen substations in Japan that receive electric power from an extra-high voltage system, we have been using modified Woodbridge connected transformers for traction power supply since the inauguration of the Sanyo Shinkansen, which commenced commercial operations in March 1972. However, this transformer is of a rather complicated structure. Therefore, we studied a new type of transformer,...
This paper presented a power conditioning system integrating microturbine (MTG) and solid oxide fuel cells (SOFC) for auxiliary power units (APU) applications. Cascaded multilevel inverters are applied to achieve the power conversion between MTG and SOFC. Two different switching schemes, i.e. independent switching scheme and unified switching scheme, are proposed to eliminate low-order harmonics of...
This paper presents the spread harmonic spectrum control for a flyback switch-mode rectifier (SMR). First, the power circuit is designed and implemented. A charge-regulated switching scheme and a robust voltage controller are designed to yield robust DC output voltage regulation response with good AC line drawn power quality. Next, the current harmonic spectral properties of the developed SMR are...
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