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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Irfan Ahmed Halepoto ¹, Anwar Ali Sahito ², Mansoor Soomro ², Sania Khaskheli ¹, Bhawani Shankar Chowdhry ¹

Affiliations
1 Department of Electronic Engineering, Mehran UET, Jamshoro, Sindh, PK
2 Department of Electrical Engineering, Mehran UET, Jamshoro, Sindh, PK

Abstract

Objectives: For the efficient and reliable operation, substation IEDs status must be monitored consistently and event information must be disseminated timely between substation levels. Methods/Statistical Analysis: Traditional power grid substations are facing infrastructural, operational, automation, systematic, monitoring and control issues. The smart grid concept and advancement in instrumentation and automation has open up the potential of substation automation system through which substation automation, intelligence and control is achieved, but devices interfacing, interoperability, time critical information exchange, substation devices status monitoring and data dissemination type issues are still in research phase. Findings: In this research work, substation bay level IEDs time critical data information dissemination model is designed by IEC 61850 standard using publisher subscriber communication. Based on IEC 61850 substation devices data object and interfacing models, a novel substation communication service mapping is proposed for the time critical data information dissemination. The proposed communication service mapping is based on abstract service communication interface technique by which an object oriented data and object models and communication service is directly mapped at Ethernet data link layer. Application/Improvements: To disseminate the data message using the proposed communication service an IEEE 802 based Ethernet frame structure is designed and configured using abstract syntax notation one technique.

Keywords

Data Dissemination, IEC 61850, IEEE Ethernet Frame, Publisher-Subscriber Communication, Substation.

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Asadullah Rahoo ¹, Abdullah Qazi ¹, Irfan Ahmed Halepoto ¹, Pirya lohana ¹, Ameet Kumar ¹, Bushra Shaikh ¹

Affiliations
1 Department of Electronic Engineering, Mehran UET, Jamshoro, PK

Abstract

Objectives: This research work involves the design and implementation of Hexapod robot which is a small, inexpensive, six-legged robot. Methods/Statistical Analysis: Hexapod robots from decennium have gained considerable attention in various research and development sectors. This research work involves the design and implementation of Hexapod robot which is a small, inexpensive, six-legged robot intended to replace huge and heavy robotic that are used in space applications, industries for lifting purpose containing solenoids and servo motors. Findings: Initial stage of research work involves design and construction of the structure of Hexapod. Plastic material is used for the construction of body and a Nitinol actuator wire is used to drive the Hexapod’s legs. The final stage involves Hexapod interfacing with Arduino and HBridge module for supply to achieve proper locomotion of the Hexapod. Specifically, real element like mechanical structure, legs arrangement, impelling, payload, movement condition and waking walk are considered in proposed system design. In this work, a novel robot is constructed and found that conservative, and lightweight Hexapod robot demonstrates guarantee for use in space, therapeutic, and other large scale robotic applications. Application/Improvements: Due to the unique actuating mechanism of nitinol wire the proposed and developed model has the impact significance in many application fields.

Keywords

Arduino, Flexinol Wire, Hexapod, Stiquito.

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Anwar Ali Sahito ¹, Muhammad Azeem Arain ¹, Irfan Ahmed Halepoto ¹, Mansoor Ahmed Soomro ¹, Muhammad Juman Jumani ²

Affiliations
1 Department of Electrical Engineering, Mehran UET, Jamshoro, PK
2 Hyderabad Electric Supply Company, Hyderabad, PK

Abstract

Increasing wind power generation affects performance of existing power system in terms of power losses, voltage regulation and short circuit levels. Jhimpir wind generation having 49.5 MW capacity is connected to 132kV network of Hyderabd Electric Supply Company (HESCO) to meet its energy demand. Distribution network of HESCO is modelled and simulated using Power system Simulator – Siemens Network Calculator (PSS SINCAL) as simulation platform. Simulation results are compared to observe impacts of wind integration to existing power system network. Simulation results indicate reduction of power losses from 15.26 to 14.79MW as a result of wind integration to existing HESCO network. Reduction in power losses is mainly caused by changed current flows in lines. Reduction in current also reduce line drops resulting in improved bus voltages. Short circuit level is slightly increased for all buses due to network modification. Increase in short circuit level is highest near the wind generation as Zorlu grid shows 13.02% increase. 66kV network shows small increase in short circuit level due to its long distance from wind generation facility. Use of real network data for this research work identifies possible protection issues alongwith the reduction in power losses and voltage drop. Each system network has separate network parameters and will have different response to any network change. Hence a simulation analysis is important to ensure maximum benefits from renewable energy sources and their integration with existing power system network

Keywords

Distribution System, Power Losses, Short Circuit Level, Voltage Regulation, Wind Generation.

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Irfan Ahmed Halepoto ¹, Sania Khaskheli ¹

Affiliations
1 Department of Electronic Engineering, Mehran University of Engineering and Technology,Jamshoro, PK

Abstract

Objectives: From an industry specific perspective, there is continuous pressure on manufacturing companies to reduce the operating expenditure by reducing the electricity cost by developing the energy efficient equipment and products especially conveyor systems. Methods/Statistical Analysis: Conveyor belts are the material handling equipment that is widely used in industry to move the material from the one place to another or from one process to next process. Conveyors are generally driven with electric motors. Conveyor systems are the one of the major consumers of electricity industries, which consumes up to 40% electricity of the total operating cost, while the remaining 60% is due to operational costs and maintenance. Findings: In this work, efficiency of a conveyor system is evaluated by integrating all the factors that have an influence on the electricity costs of the conveyor system. Using variable speed drive mechanism, an energy efficient conveyor system is developed by physically modeling the speed of the belt and conveyor loading dynamics mechanism under no load, marginally loaded and full loaded conditions. For the energy efficient conveyor system, different start-up of conveyor methods are evaluated as a baseline reason of generating the motor torque in comparison to rated voltage as an optimal energy management tool to develop a relationship across the power consumption, conveyor belt speed and belt loading dynamics. Application/Improvements: The design of energy efficient conveyor system model by controlling multiple drive units in industrial units.

Keywords

Conveyor Loading Dynamics, Conveyor System, Energy Efficiency, Variable Speed Drive.

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Muhammad Farrukh ¹, Irfan Ahmed Halepoto ², Bhawani Shankar Chowdhry ², Hameedullah Kazi ¹, Bharat Lal ¹

Affiliations
1 Department of Electrical Engineering, ISRA University, Hyderabad, PK
2 Department of Electronics Engineering, Mehran UET, Jamshoro, PK

Abstract

Objectives: This paper proposes the design and implementation of an automatic liquid distillation system. The prototype is designed for mainly two functions: liquid distillation and tank level. Methods/Statistical Analysis: Prototype presented involves a process of separating the mixture (Methanol & water) and improves the production by managing the whole system automatically. The prototype designed gives a simple controlling & monitoring i.e. data acquisition of fluid level with the help of PLC S7200. Distillation is the main theme behind this research work that plays a vital role in many industries in dealing with boiling of liquids and liquid levels. Findings: At initial stage the implementation of a robust mechanical design is constructed to sustain excessive temperature; besides this a console panel is made to manually control and indicate the state of actuators. At final stage PLC interfacing and programming with electrical components (level detector circuit, thermocouple, pump, heater, solenoid valve etc.) is done for achieving the efficient and fast automatic process. In the last design was experimented with actual solution, it was found that 90% of the methanol was retrieved in condensation chamber; also temperature linearization was observed during the process. Applications: Error free mechanism and fast actuation makes this model significant for many industries which deal with huge boilers where engineers tackle with controlling & monitoring of liquids i.e. sugar mills, milk factories etc.

Keywords

Analog Module EM235, Liquid Distillation, PLC S7200, STEP 7 Micro-Win, Tank Level Controlling

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