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.
Results
Showing 1 to 9 of 9 for “"non-linear load"”.
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Design a filter for harmonics caused by non-linear load and resonance coused by power factor correction capacitor
… banks (PFCC). However, with the expanding use of non-linear equipment such as adjustable speed drives (ASDs), power converters etc., power factor (PF) improvement has become difficult due to the presence of harmonics generated by the non-linear equipment. The resulting capacitive impedance of the …
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Study of work flow in piezoelectrically driven linear and non-linear systems
… efficiency of active systems working against a load neglect the load coupling inherent in these systems. This thesis contains a derivation for finding the actuation efficiency and work output in electro-mechanically coupled systems working against a load. This general derivation is for fully …
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Finite element modelling of shear connection for steel-concrete composite girders
… simulated taking into consideration all material nonlinearities of the components. The models are able to predict the headed shear stud capacity, the load-slip characteristic of the shear connection and modes of failure. The results obtained show good agreement with specified data from Codes of …
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Modeling and Control Design of a Bidirectional PWM Converter for Single-phase Energy Systems
… is of importance because of the sensitive loads. In this thesis, different multi-loop-based control schemes are investigated and compared, especially between the load current feedback control, PR control and capacitor current loop control. It shows that PR controller reduces the …
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Harmonic emissions assessment for common DC and AC electric vehicle charging station architectures
… are grid-connected, they are going to be a new non-linear load for the host utility, which will impact its Power Quality (PQ). In this thesis, Common DC and AC bus (CDCB and CACB) architectures for grid-connected FCS are examined. For both architectures, two-level Voltage Source Converter (VSC) …
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Analysis of shallow and deep foundations using soil-structure interaction techniques
… soil moduli for a range of axially and laterally loaded pile-soil configurations. The results are verified by comparison with more rigorous solutions and the measured performance of single piles.<br/><br/>The work is extended to consider the interaction of axially and laterally loaded pile groups …
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Supporting the UK distribution networks with power electronic end user voltage regulation
… an increase of voltage distortion to 9.5% when a non-linear 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 …
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Control Strategies for High Power Four-Leg Voltage Source Inverters
… power systems. In particular, specific loading conditions present interesting challenges to inverter-fed, high power systems. No-load, unbalanced loading, and non-linear loading each have unique characteristics that negatively influence the performance of the Voltage Source Inverter …
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High performance electronic systems for high bay light emitting diodes fed from alternating current power grids
… grid without incurring into the flicker phenomenon which is not only annoying but harmful for human beings. Thus, an interface is required between the ac power grid and the LEDs in order to drive the LEDs with a constant current that ensures a good quality light output. This interface is …