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The Power system disturbances like harmonics creates lot of power quality problems need to be analyzed with suitable analysis techniques. A simple technique has been presented in this paper for impedance load modelling of electric domestic loads like Geyser water heater system and Air conditioning System (AC). In this paper, the application of Kalman filtering algorithm is used for harmonic estimation...
The PWM Inverters are widely used in electric power system to accomplish speed control of motors in various process industries, power station auxiliaries, etc. The usage of fast switching devices like IGBT PWM Inverters has led to the failure of many motors in different field of applications. This has aroused interest to study the impact of these PWM Inverters on the performance of induction motors...
Advances in power electronics technology have improved the performance and output waveforms of PWM voltage source inverters. Switching frequencies of 2 to 15 kHz with 0.1 mus rise times are common with the current IGBT technology while allowing for power levels over 200 kW. While the high switching speeds and zero switching loss schemes drastically improve the performance of the PWM inverters, the...
Many of today's induction machines are operated using variable speed drives (VSD). VSDs are used for controlling the speed of induction machine by adjusting the amplitude and frequency of the AC voltage. These adjustments are made by advanced technology in semiconductors, which are faster switching devices. Faster switching reduces the switching power loss, requiring less heat sink, thus enabling...
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