Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"harmonic elimination"”.
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Harmonic elimination by switching angle optimization technique for multilevel inverter
The needs for a free harmonic and high rating power source is increased to meet the required industry applications. In this project, a 7-level Cascaded H-Bridge Multilevel Inverter (CHBMLI) with two various controllers are presented. Proportional Integral (PI) and Artificial Neural Network (ANN) …
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Application of Modular Multilevel Converters (MMC) Using Phase-Shifted PWM and Selective Harmonic Elimination in Distribution Systems
… pulse width modulation (PS-PWM) and selective harmonic elimination (SHE) switching algorithms are selected to modulate the MMC terminals. To validate the proposed techniques simulation files are built in MATLAB/SIMULINKTM. Simulation results are presented and analyzed to verify the theoretical …
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Impact of pulse width modulation schemes In eccentricity fault detection using current signature analysis
… Pulse Width Modulation (SPWM) and Selective Harmonic Elimination (SHE) on diagnosing eccentricity faults in three-phase synchronous motor drives. The study involves a three-phase, 2 kW, 208 V, 1800 rpm synchronous motor driven by an inverter, which is controlled via a Raspberry Pi Pico2 …
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Implementation of a Digital Signal Processor (DSP) Based Space Vector Control of AC Induction Motor Drives
… Modulation (PWM) are compared in terms of their harmonic elimination capability and fundamental gain control. Various PWM techniques such as bipolar switching, unipolar switching, selective harmonic elimination switching and Space Vector PWM (SVPWM) switching are analyzed and compared in terms of …
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Development of one cycle current controller using raspberry Pi for 3 phase active power filter for nonlinear load improvement
… The effect of nonlinear loads are create harmonic current in additional to the fundamental AC current waveform and transform the shape of the current from sine wave to some other form such as “double-hump”, and it can affect both the distribution system equipment and the loads connected to …
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Addressing control and capacitor voltage regulation challenges in multilevel power electronic converters
… voltage waveform. In the proposed method, the harmonic elimination technique is used to determine the switching angles. A constraint was then derived to identify modulation those indices that lead to voltage regulation of the capacitor. This constraint can be used in optimization problems for …
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New Modulation Method and Control Strategies for Power Electronics Inverters
… superior characteristics such as lower total harmonic distortion (THD), higher efficiency, and lower switching voltage stress. Nevertheless, the superior characteristics come at the price of a more complex topology with an increased number of power electronic switches. The increased number of …
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Supporting the UK distribution networks with power electronic end user voltage regulation
… load was energised. A method of controlled harmonic elimination was found to be more effective, reducing the voltage distortion from 8% to 3% at the cost of increasing current distortion. Therefore PUVR has been demonstrated as a viable alternative to standard network reinforcement because …
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Current source based wind energy conversion system
… CSI) of the WECS are controlled using selective harmonic elimination (SHE) for low semiconductor loss operation. The grid side CSI is connected to the ac grid through a three-winding phase-shift transformer to benefit from cancellation of the low-order harmonics in the primary winding, which is …
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POWER CONDITIONING UNIT FOR SMALL SCALE HYBRID PV-WIND GENERATION SYSTEM
… peak current control (p.c.c.) with selective harmonic elimination. A design procedure has been proposed for the controller. Then, the method was demonstrated by simulation. The problem of the dc current injection to the grid has been investigated for such inverters. The causes of dc current …
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Back to Back Active Power Filter for Multi-Generator Power Architecture with Reduced dc-link Capacitor
… scale power generating system to comply with harmonic regulations. Among all types of multi-pulse converters, a 12-pulse converter is the most widely used due to the simple structure, which consists of a delta-delta and a delta-wye phase-shift transformer pair and it effectively mitigates …
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Multiple Three-Phase Induction Generators for Wind Energy Conversion Systems
… producing and non-producing subspaces, low order harmonic elimination, maximum power point tracking control, and voltage oriented control of the grid side VSI. Moreover, various WECS supply topologies were considered where developed current and power sharing would be a necessary requirement. …