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This paper presents a photovoltaic module cell temperature measurement and 81 points heat distribution mapping technique using only 9 temperature sensors. The operating principle, mapping technique, experiment setup and performance analysis of the proposed measurement system is discussed. The proposed measurement system consists of 9 negative temperature coefficient thermistor based temperature sensors...
This paper presents an evaluation of power quality, experienced at UCSI University's North Wing Campus. A power quality recorder is installed at the main feeder switch board for 24/7 campus wide monitoring and recording. It is found from the recorded data that the university campus experiences up to 4 power quality abnormally monthly. There are voltage sags, interruptions, oscillatory transients and...
This paper presents a comprehensive modeling, simulation and computational implementation of buck converter. Four modeling approaches of buck converter including mathematical, circuitry, transfer function and state space modeling are presented. Each modeling approach is demonstrated with various computational implementation methods including graphical, functional block and text based programming in...
Rotary crane system is extensively used in many applications to carry payload from one position to another position. The cart and jib of the crane will start to accelerate in linear and rotational motions respectively when input signal to the crane system is applied. This will cause the swinging or swaying of the payload. Therefore, an anti-swing for automatic crane is usually proposed. This project...
This paper presents a simplified approach for fundamental photovoltaic module performance analysis. The performance analysis is based on monthly average solar irradiance data and photovoltaic module parameters obtained from manufacturer datasheet. The proposed simplified approach is capable to compute the photovoltaic module power output without the need of complex photovoltaic modeling calculation...
This paper presents the design of power frequency meter based on IEC 61000-4-30 standard using virtual instrument approach. The virtual power frequency meter hardware consists of a zero crossing detection circuitry and a low cost USB data acquisition card. The proposed virtual power frequency meter design utilizes the zero crossing detection circuitry and the counter unit of the data acquisition card...
This paper presents the estimation method of solar irradiance in W/m2 based on the short circuit current output produce by the photovoltaic module. The proposed solar irradiance estimation method is derived using photovoltaic mathematical model. Therefore, photovoltaic module modeling is required to develop the proposed estimation method. The modeling includes the identification of photovoltaic module...
A multiple magnitude-duration (MMD) function is proposed for voltage sag acceptability assessment. The MMD function is a statistical representation of voltage sag derived from its rms analysis. The MMD function maps a series of correlated sag magnitude and duration points onto the standard power acceptability curve, revealing the dynamic characteristic of voltage sag across the standard power acceptability...
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