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In this paper, the absorption characteristic for optimum light harvesting with dual solvent were studied. The effect of solvents from ethanol and deionized water (di-water) used in the sensitization process was investigated from the photon energy and absorption coefficient (α) point of view. Fabrication of TiO2 is done by using Dr. Blade's method and by using carbon smeared counter electrode. B-Etha...
The variability associated with wind energy generation can be mitigated by applying optimisation strategies to determine the geographical locations and sizes of wind power plants. Mean-variance portfolio theory has been proposed as in the literature for optimising wind farm locations, but applying it to a large geographic area with many wind speed datasets yields a solution that may not be practically...
This paper demonstrates a prototype of DC electrified house and can be implemented for rural electrifications. More specifically, this paper focuses on the development and construction of an efficient DC powered house by economising the losses in the conductor, cable length and total cost of the system. Also to verify that both the cost and losses can be minimised in solar power DC system with respect...
In the photovoltaic (PV) emulator application, an accurate PV mathematical model is needed to ensure the emulator can produce the same current-voltage (I-V) characteristic of a PV panel. The PV circuit model is able to simulate the PV panel accurately. However, this model requires the numerical method to solve the implicit equation of the model and the complex parameter extraction can burden the PV...
To increase the maximum possible benefits of technical, economic and environmental aspects, the optimal sizing and sitting of distributed generation in distribution system has always been challenging for customers as well as to utilities. The objective of optimum sitting of distributed generation in a distribution system is to reach suitable operation of such systems with minimization losses of the...
This paper proposes a compact topology for an integrated PV and energy storage system based on three boost converters and one bidirectional buck-boost converter. One of the boost converters is used for MPPT control, and the other two boost converters are used to implement a boost inverter that can generate sinusoidal waveform. A bidirectional buck-boost converter, to charge and discharge the energy...
This paper proposes zero voltage switching (ZVS) bi-directional DC-DC converter with auxiliary circuit. The conventional DC-DC converter has the problem which is switching loss by the hard switching. The proposed ZVS bi-directional DC-DC converter uses the soft switching with an additional circuit to decrease the switching loss. The additional circuit is made up the resonant inductor and back-to-back...
Tangent delta measurement is a well-known diagnostic used by many utilities for condition assessment. Guides on field diagnostic testing are well established by North American society through IEEE standards and guideline. Tangent delta, also called loss angle or dissipation factor (δ) measurement, is a diagnostic method of testing underground cables to determine the quality of the cable insulation...
Mineral oil is a petroleum-based oil which is nonrenewable and is running out in the future. It is also non-biodegradable, thus, it can be harmful to the environment when there is oil spillage. Therefore, this work is conducted with an intention to reduce the usage of petroleum-based oil by mixing it with natural ester oil. This is achieved by mixing the mineral oil (MO) and palm fatty acid ester...
This paper presents de-noising of PD signal using three different techniques; ANN, FFT and DWT. The objective of this paper is to yield the PD signal from the disturb signal which is the combination of PD and noise signal. These signals are generated using EMTP-ATP simulation environment. This research used the straightforward procedure in the de-noising technique. The accuracy of the de-noising is...
This paper presents a new control scheme that permits arbitrary power sharing between parallel inverters connected to a microgrid operating in island mode. The scheme processes the active and reactive output power information from all the inverters in a central controller that calculates the set-points for each inverter, based on the desired ratios of their output powers. This necessitates adjustment...
This paper presents a portable and low cost data acquisition (DAQ) system for Piezoelectric Cymbal Transducer (PCT) energy harvesting system. Conventional DAQ system is operates based on bulky and expensive personal computer (PC) which is inflexible to be used in PCT energy harvesting system. The proposed system consists of self-assembly PCT, electrical energy harvesting circuit and ARMmbed microcontroller...
The paper evaluates the charge-discharge cyclability of ultracapacitor with glass wool separator under various concentration of aqueous sulfuric acid (H2SO4) electrolytes. For lower concentrated electrolyte of 1 mol/dm3 H2SO4, the performance was compared to an ultracapacitor with conventional cellulose separator. Two-electrode ultracapacitors were constructed by sandwiching two activated carbon electrodes...
This paper presents a new technique to improve the centralized power sharing scheme for parallel connected inverters in AC islanded microgrids. The proposed technique is based on centralized power sharing scheme using Fuzzy Logic Controller (FLC). This technique can accurately control the active and reactive power coming from inverter thus ensuring excellent power sharing. Simulation results are presented...
Alternative energy systems (AES) are becoming popular for small scale power generation. Designing the converters which transform the DC power into AC is the main development area of AES. Conventional single-phase voltage source inverter (VSI) uses buck topology which gives lower average output voltage than the input DC voltage. However, where the output voltage requirement is larger than the input...
This paper presents the solution for odd and even number of switching angles of harmonic elimination pulse width modulation (HEPWM). HEPWM capable to eliminate low order harmonics of inverter output voltage by solving the transcendental equation of the switching angles. The optimum switching angles are calculated using differential evolution (DE) algorithm. DE is simple and effective algorithm. The...
This paper proposes a control strategy for the mono converter dual parallel (MCDP) surface-mounted permanent magnet synchronous generator (SPMSG) in the wind power generation (WPG) system. Since the MCDP SPMSG in the WPG system means that two generators are connected to the mono converter in parallel, it can reduce the cost and simplify the configuration of the WPG system compared to fundamental power...
This paper explores the role of haptics in wireless communication and bilateral system to improve the development on bilateral teleoperation system in the future. The telecommunication applications in haptic is to separate between master and slave control in various distances. This purpose is commonly used in medical surgery between different countries or buildings. This technology helps to analyse...
Artificial Neural Network (ANN) is a nonlinear signal processing devices and works based on human brain principles. It is one of the most widely used techniques for forecasting and predicting. In this work, ANN is used to model baseline electrical energy use for a chiller system. In this work, three inputs that are affecting energy use of the chiller system are selected i.e. 1) refrigerant tonnage,...
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