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The application of autonomous directly photovoltaic (PV) powered electro-mechanical has received increasing attention for different applications (e.g. PV water pumping, PV powered cooling of arid climate greenhouses, solar vehicles etc). The PV array output is a nonlinear and time-dependent power supply that varies with solar intensity and cell temperature, so the performance characteristics of the...
The increase in power demand has compelled the power system utilities to use series capacitive compensation in long transmission lines. A problem called sub synchronous resonance (SSR) occurs in long lines because of series compensation. In this paper a flexible a.c. transmission system (FACTS) device is used along with a proposed controller to damp out the sub synchronous oscillations from the system...
The force and moment at ankle, hip and knee joints are determined based on reaction forces and moments acting at those joints. The reaction forces and moments developed at these joints are due to the ground reaction forces at the foot. These ground reaction forces are measured using force plates. And using newton's equations of motion, the forces and moments at ankle, knee and hip joints are calculated...
As a result of increase in the installed capacity of wind power systems around the world, providing Low Voltage Ride-Through is one of the prime requirements of Grid Codes. Wind farms are now required to comply with stringent connection requirements which include remaining connected during grid faults, providing reactive power support, achieving system stability and voltage regulation. The paper analyzes...
In this paper a control strategy for robotic manipulator based on the coupling of the Backstepping sliding mode control (BSMC) and equivalent control approach has been presented. Initially, the Proportional Integral Derivative (PID) controller has developed for three different control strategies (IATE, ISE and ISTE) using GA. BSMC has developed for best optimal criterion by using GA. The main objectives...
Direct Torque Control (DTC) of brush less DC (BLDC) motor having trapezoidal back emf with a reduced torque ripple is presented in this paper. Unlike conventional six step PWM technique, a quasi square wave current is obtained by selecting the voltage vectors from the pre defined switching table, which results in faster torque response compared to the conventional scheme. In the constant torque region...
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