Informatics Publishing Limited

Mansoor Ahmed Soomro ¹, Anwar Ali Sahito ¹, Irfan Ahmed Halepoto ¹, Kamran Kazi ¹

Affiliations
1 Department of Electrical Engineering, MUET, Jamshoro, Sindh, PK

Abstract

Power quality refers to the provision of the clean and stable electrical power supplies with least interruptions of current and voltage However, power quality problems arise due to the application of nonlinear loads with end user devices. Electrical installations majorly suffer from adverse effects of harmonic currents and voltages. Though, this problem has been decades long and pattern of investigation for the researchers but due to evolution of semiconductor technology, it has become burning issue with reference to the power system loads. Therefore, it becomes necessary to mitigate these harmonics for the safe operation of electrical appliances. Thus, harmonic passive filters are cost effective and easy to implement. In this work, the mitigation of current harmonics has been accomplished through single tuned Shunt Harmonic Passive Filter (SHPF). Furthermore, the application of six pulse multiplication converter technique ensures the mitigation of dominant 3rd harmonic currents and reduction of succeeding 5th and 7th harmonic currents. Furthermore, shunt operation of single tuned harmonic passive filter enables the current to follow the low impedance path. Consequently, the current harmonic distortion becomes less than 5 % according to allowable IEEE 519 -1992 standards. This reduction in harmonic distortion not only reduces the losses incurred in the system but it also improves the energy efficiency of the electrical Power Distribution System (PDS).

Keywords

IEEE 519 -1992 Standards, Energy Efficiency,Passive Harmonic Filters, Power Quality, Single Tuned Shunt Harmonic Passive Filter,Six Pulse Multiplication Converter.

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Ayaz Ahmed Soomro ¹, Imtiaz Hussain Kalwar ², Kamran Kazi ², Sarang Karim Khoso ², Shahzeb Ansari ³

Affiliations
1 Quaid-e-Awam University College of Engineering, Science and Technology, Nawabshah, PK
2 Mehran University of Engineering and Technology, Jamshoro, PK
3 D1Quaid-e-Awam University College of Engineering, Science and Technology, Nawabshah, PK

Abstract

The paper aims to engineer an efficient technique for the condition monitoring of induction motor that not only provides the detection and identification of the faults but also assesses the operational condition of the motor. Induction motors possess one of the most important roles industrially and commercially. The developing faults in the motors can become catastrophic, if remain unanalyzed. The paper presents an effective novel solution to diagnose the major mechanical faults at the early possible stage by utilizing two efficient condition monitoring techniques to effectively deploy the strategies for the predictive maintenance. Primarily it employs the MCSA (Motor Current Signature Analysis), in which the faults are located by the spectral analysis of the particular harmonic components in the line current at specific characteristic frequencies generated by specific faults as the unique rotating flux. Fuzzy logic system has also been utilized, which assesses severity of the fault and operating condition of machine. The induction machine’s modular Simulink implementation has been presented that unlike other approaches provides the access to almost all parameters of the machine for analysis and control purposes. The mechanical faults specially bearing and eccentricity faults are simulated and successfully detected and localized in the results along with the severity assessment of the operational condition due to simulated faults.

Keywords

Bearing faults, Condition Monitoring, Eccentricity, Fault Diagnosis, Fuzzy Logic, MCSA.

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