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Several modulation techniques like Pulse Width Modulation (PWM), space vector modulation (SVM), Selective harmonic elimination (SHE) are developed for multilevel inverters to improve the quality of power. SHE technique is found to be best in comparison with other techniques for high power applications due to less switching losses and eliminates the lower order harmonics. In this paper, Simulated Annealing...
State of power system is often determined by taking simultaneous measurements across the grid. However, in developing countries with geographically expansive grid, if the measurements are not GPS time-stamped there are latencies owing to distance of sensor from control center or communication system performance. The latency and resulting time-skews in data fed as input to state estimator program may...
Various control and modulation techniques such as Sine Pulse Width Modulation (SPWM), Space Vector modulation (SVM) and Selective Harmonic Elimination (SHE) have been used for multilevel inverter (MLI). The best method is SHE due to low switching losses and it suppress the specific unwanted harmonic. The various algorithms such as Genetic Algorithm (GA), bee algorithm, resultant theory and swarm intelligence...
The permanent magnet synchronous generation (PMSG) systems are more popular for low and medium power wind generation applications. Since power converters used in the PMSG systems has a drawback like poorer DC bus utilization of a conventional inverter at lower wind speeds restrict the lower energy generation region. The lower limit of the generation system defined by rating, topology and PWM techniques...
Multilevel inverter (MLI) has various advantages such as less EMI issues, voltage stress and switching losses, it is a best choice for industrial application. In tradition inverters, Harmonics can be eliminated by using large size of filters due to the lower order harmonics. This leads to increase the overall size, volume and cost of an inverter. But in MLI, the implementation of selective harmonic...
When large wind farms are integrated to grid a complete power flow and dynamic study is necessary to identify the most probable problems and to develop methods to mitigate them. Wind farms are usually spread over a wide area and has many wind generators, which produce varying active power as they are exposed to different wind patterns. Most wind power systems are based in remote rural locations and...
The application of communication and information technology in electrical utility makes consumers to be very comfortable. From the perspective of energy saving and power efficiency in Generation, Utility, Industry and homes an effective supervising of appliances is required. Now a day, smart grid conceptusing various cost effective communication technology and architecture proves electrical sector...
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