For economic benefit of wind power generation, the equivalent conversion relationships and models between the different “quality” energy are studied deeply in the conversion processes of wind energy. Considering the effect of load demand characteristics and energy supply price on the wind energy utilization mode comprehensively, the multi-objective trans-utilization optimization model of wind e...

The power quality issues in the world today are critical to development of different nations. Prosperity each nation depends on availability constant supply and is very important required developments past, present future. Constant a major challenge Africa particularly Nigeria where generated less than thirty percent power. metrics voltage sag, flickers, spikes, harmonics, notching, transients ...

This paper presents a multi-objective control strategy for power quality issues. With increasing applications of nonlinear and semi-conductor devices in distribution systems and industries, power-quality (PQ) problems, such as harmonics, neutral current elimination, voltage sag, voltage swell reactive power has become an unavoidable issue. Due to the changing trends and restructuring of power s...

This paper presents a virtual measurement instrument for detection and analysis of power quality disturbances in voltage supply using wavelets. The instrument developed can operate in different working modes depending on the type of power quality disturbance to be detected and analyzed. In each mode different wavelet analysis (discrete or wavelet-packet transform), with different mother wavelet...

With the increasing demand for power from the ac line and more stringent limits for power quality, power factor correction has gained great attention in recent years. A variety of circuit topologies and control methods have been developed for the PFC application. International Standards in the area of compliance of a product’s AC mains current harmonics have forced that new power supply design ...

The application of power semiconductor devices in the area of power electronics and power system are the key factors which kindle the power quality problems particularly the harmonics, burden of reactive power and neutral current due to unbalance. The above citied power quality problems are predominant due to wide usage of 1-φ / 3-φ , linear and nonlinear loads which are fed from three phase fo...

Increasing regenerative power sources installed in low voltage grids tend to cause overvoltage problems due to the reverse power flow direction. Consequently, regenerative sources need to be turned off temporarily or on the long term, the grid infrastrucutre would have to be extended by the utility company. Additionally, the increasing number of grid connected power electronic systems causes a ...

Renewable energy resources (RES) are being increasingly connected in distribution systems by utilizing power electronic converters. However, the extensive use of power electronics has resulted in a rise in power quality (PQ) concerns faced by the utility. A novel control strategy implementing reference compensation current was proposed in this paper. So that these grid-connected inverters can a...