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This paper presents the single-phase sinusoidal pulse width modulated ac chopper topology with power MOSFET embedded four-quadrant switch (4QSW) realizations and examines from the power quality viewpoint the potential for its use in ac power control. The examination is conducted for resistive and inductive loads by theoretical estimate of the current harmonic content at the ac utility and load. Sinusoidal...
Now a days usage of electronic equipments have been increased, in most of these equipments have energy storage system. To store energy in the battery with a specified limit of power, certain switched power conversion circuits are needed. This conversion circuit delivers power even though the load is detached from the source. As our country's power demand is very high, the no load power minimization...
Low voltage Ride through (LVRT) capability has become more and more an issue for newly integrated wind turbines. To the best of our knowledge, this paper is the first to develop field tests for real wind turbines on Northeast China wind farms. It is therefore different from other papers that validate LVRT control strategies through running software simulations on a computer. To examine a single wind...
Synchronous generator excitation control system is one of the most important parts of power system control. And as PID control is one of the first developed and the most widely used control schemes in excitation system, its parameters tuning problem has been highly concerned. Since MATLAB genetic algorithm toolbox has the characteristics of strong robustness and efficient optimization, this paper...
This paper compares voltage gain of control methods for the Z-source inverter under a given boost factor. The control methods of the Z-source inverter are simple boost control, maximum boost control and maximum constant boost control respectively. The Z-source inverter advantageously utilizes the shoot-through switching states besides active and zero states. The Z-source network makes the shoot-through...
Electric distribution systems are becoming large and complex leading to higher system losses and poor voltage regulation. This has stressed the need for an efficient and effective distribution network. The main objective of this paper work is to determine optimal location for capacitor placement in radial distribution feeders to improve the voltage profile and reduce the energy loss. This problem...
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