Differential equation fault location algorithm with harmonic effects in power system

About 80% of faults in the power system distribution are earth faults. Studies to find effective methods to identify and locate faults in distribution networks are still relevant, in addition to the presence of harmonic signals that distort waves and create deviations in the power system that can cause many problems to the protection relay. This study focuses on a single line-to-ground (SLG) fault location algorithm in a power system distribution network based on fundamental frequency measured using the differential equation method. The developed algorithm considers the presence of harmonics components in the simulation network. In this study, several filters were tested to obtain the lowest fault location error to reduce the effect of harmonic components on the developed fault location algorithm. The network model is simulated using the alternate transients program (ATP)Draw simulation program. Several fault scenarios have been implemented during the simulation, such as fault resistance, fault distance, and fault inception angle. The final results show that the proposed algorithm can estimate the fault distance successfully with an acceptable fault location error. Based on the simulation results, the differential equation continuous wavelet technique (CWT) filter-based algorithm produced an accurate fault location result with a mean average error (MAE) of less than 5%

Intelligent Power Monitoring (i-POM)

Power failure is a major problem in big industries such as automotive industry, electronics industry, food industry and many more. When equipments or machines fail to operate, it often leads to downtime which may interrupt the production rate. This phenomenon can cause losses to the companies. Thus, Intelligent Power Monitoring (i- POM) can be considered as the viable solution for the downtime problem due to power failure. This paper will focus on reducing downtime problem using Radio Frequency Identification (RFID) and GSM (Global Systems for Mobile Communication) Modem communication system. Using this technology, power failure can automatically detect and send related information directly to the relevant authorized persons' (electrician) mobile phone in a systematic manner. There are two essential pieces in this i-POM, which comprises hardware and software

Intelligent Power Monitoring (i-POM)

Power failure is a major problem in big industries such as automotive industry, electronics industry, food industry and many more. When equipments or machines fail to operate, it often leads to downtime which may interrupt the production rate. This phenomenon can cause losses to the companies. Thus, Intelligent Power Monitoring (i- POM) can be considered as the viable solution for the downtime problem due to power failure. This paper will focus on reducing downtime problem using Radio Frequency Identification (RFID) and GSM (Global Systems for Mobile Communication) Modem communication system. Using this technology, power failure can automatically detect and send related information directly to the relevant authorized persons' (electrician) mobile phone in a systematic manner. There are two essential pieces in this i-POM, which comprises hardware and software

Mathematical Derivation of Switching Angles of Multilevel Voltage Source Inverter based on Alternative Phase Opposition Disposition (APOD)

Modular structured multilevel inverter is very useful for electrical application especially in high voltage and high power applications. The main function of this multilevel inverter is to produce multilevel AC output voltage from several separate DC sources. This project is to derive a newmathematical formulation of multilevel voltage source inverter switching instants. The proposed method for this project is based on the sinusoidal natural sampling PWM (SPWM) by comparing several modified modulation signal with a triangular carrier signal. This resulting intersection points between this modulation and carrier signal become the switching instants of the PWM pulses. Derivation also based on Alternative Phase opposition disposition (APOD). A cascaded multilevel inverter is selected as a topology for this project due to major advantages compare with other topology. The derived formula is analyzed by using MATLAB simulation software. It is found that the results that use the derived formula are almost identical to simulation result

Mathematical Derivation of Switching Angles of Multilevel Voltage Source Inverter based on Alternative Phase Opposition Disposition (APOD)

Modular structured multilevel inverter is very useful for electrical application especially in high voltage and high power applications. The main function of this multilevel inverter is to produce multilevel AC output voltage from several separate DC sources. This project is to derive a newmathematical formulation of multilevel voltage source inverter switching instants. The proposed method for this project is based on the sinusoidal natural sampling PWM (SPWM) by comparing several modified modulation signal with a triangular carrier signal. This resulting intersection points between this modulation and carrier signal become the switching instants of the PWM pulses. Derivation also based on Alternative Phase opposition disposition (APOD). A cascaded multilevel inverter is selected as a topology for this project due to major advantages compare with other topology. The derived formula is analyzed by using MATLAB simulation software. It is found that the results that use the derived formula are almost identical to simulation result