Category: Master

This thesis presents a robust control strategy for a single-phase DC-AC inverter with output LC-filter. The control method using dq-synchronous frame is commonly used for three-phase systems but it is quite challenging for single-phase systems. In this thesis, an all-pass filter is utilized to create an artificial β-signal so that the proposed controller can be…

This thesis presents a robust control strategy for a single-phase DC-AC inverter with output LC-filter. The control method using dq-synchronous frame is commonly used for three-phase systems but it is quite challenging for single-phase systems. In this thesis, an all-pass filter is utilized to create an artificial β-signal so that the proposed controller can be…

Cambodia aims to supply electricity to all villages with 100% electricity by 2020. In fact, in 2015, the supply was 62%. Electricity consumption in Cambodia is growing at an average annual rate of 6.9%. Seeing the shortage of energy in the future, many PV Power Plant projects have been installed in the past few years.…

A robust control strategy is proposed for a three-phase grid-connected inverter under unbalanced grid voltage conditions in this thesis. This scheme consists of dual-current controllers for positive and negative sequence components to achieve one of three control objectives: i) supplying balanced three-phase current, ii) supplying constant active power, and iii) supplying constant reactive power to…

Abstract The over-dependence on fossil fuels as primary energy source has led to myriads of problems such as global climatic change, environmental degradation and various human health problems. Moreover, the recent rise in oil and natural gas prices has called for researchers towards alternative energy sources for the future. This study therefore investigates the digestion…

Traditionally, in order to control output voltage of the Three-Phase Inverter, the proportional-integral (PI) controller using dual-loop voltage control strategy has been used. However, physical input constraints were not considered in the design of the PI controller, and there was no analytical method to determine the control gain. This paper presents a dual-loop inverter voltage…

For power supply in the power system, the Economic dispatch (ED) has played an important role in the study of power system (Power Demand). The Optimal generation dispatch problem in which a fuel-powered generator or Fuel power plant is used to solve the Fuel Cost Function equation makes it difficult to solve the Fuel Cost…

Thermoelectric refrigerator (TER) is a new option because it can convert electricity into cooling, which is useful and effective in food preservation, Vaccines, medicine and electronics device. especially, it reduces the use of refrigerated gases and reduces the release of chlorofluorocarbons (CFCs), which cause climate change and global warming. in response to all the above…

The sun is the primary source of energy for the earth’s climate system and it releases an enormous amount of radiant energy into the solar system. The attenuation of solar radiation is due to scattering and absorption by air molecules, dust particles and aerosols in the atmosphere. The radiation received by the earth varies according…

An arc fault because of a damaged electrical wire may cause an electrical fire. The ability of arc faults to cause electrical fires has necessitated research and development in the field of arc fault detection. This thesis studies and analyzes arc faults at a low voltage level in the presence of household electrical loads. The…