Browsing by Author "Qureshi, Tahoora"

Now showing 1 - 13 of 13
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    Electrical Machines 1 (EMC-I)
    (AIKTC, 2017-09-23) Qureshi, Tahoora
    eCourseware: Semester III, B.E. Electrical Engineering
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    Elements of Power System (EPS)
    (AIKTC, 2016-10-11) Qureshi, Tahoora
    eCourseware: Semester IV, B.E. Electrical Engineering
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    Elements of Power System (EPS)
    (AIKTC, 2017-09-23) Qureshi, Tahoora
    eCourseware: Semester IV, B.E. Electrical Engineering
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    High voltage direct current transmission (HVDCT)
    (AIKTC, 2016-10-11) Qureshi, Tahoora
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    High voltage direct current transmission (HVDCT)
    (AIKTC, 2017-09-27) Qureshi, Tahoora
    eCourseware: Semester VII, B.E. Electrical Engineering
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    Load flow analysis in power system using ETAP software
    (AIKTC, 2020-05) Qureshi, Tahoora; Devkar, Nikita (17DEE46); Nayakwadi, Anis (17DEE57); Pandey, Sachin (17DEE58); Patil, Siddharth (17DEE59)
    ETAP (Electrical Transient Analysis Program) is the most comprehensive analysis tool for the design and testing of power systems available. Using its standard offline simulation modules, ETAP can utilize real-time operating data for advanced monitoring, real-time simulation, and optimization and energy management systems. It is invented and started in California, USA from1986. It is widely used for more than 30 years for power system studies across the world. ETAP has been designed and developed by engineers for engineers to handle the diverse discipline of power systems for a broad spectrum of industries in one integrated package with multiple interface views such as AC and DC networks, cable raceways, ground grid, GIS, panels, arc flash, WTG, protective device coordination/selectivity, and AC and DC control system diagrams. The project is based on load flow analysis of power system using etap software. Load flow analysis helps to determine the active power flow, reactive power flow, power factor, losses, bus voltage profiles etc. in the system. The study also target to analyse the load flow result outcomes, its improvement and mitigation. Here, initially we have considered a simple SLD and modelled it in the etap software. Additionally, the simulated results from the etap software for simple SLD are compared and validated with the manual calculation also. Further, the main SLD is constructed in etap with the detailed modelling of electrical equipment’s such as grid, transformers, loads etc. The project is performed with consideration of two configurations ‘Normal Configuration’ and ‘One_TR_Out Configuration’. The load flow study results are simulated for various operating conditions (maximum, minimum and normal) of generator and load. From the study results it is observed that during Minimum load flow case overvoltage’s are observed at 0.415 kV LV buses Bus3 & Bus5 as 107.7 %. However, with +2.5% tap setting of transformers T2 & T4 the voltages at Bus3 & Bus5 reduces within the voltage violation limit of ± 5%. During maximum load flow case it is observed that transformer T1 is supplying power to all downstream system of 6.6 kV and 0.415 kV (as the other two transformer’s T3 & T4 are out of service) causes overloading of transformer T1. To overcome this situation, the transformer T1 & T3 ratings are increased to 31.25 MVA using ONAF cooling; and OLTC tap limit to increased to ±15%. With this solution, it is observed that there is no overloading of any equipment an also the bus voltage profiles are well within the acceptable limit of ±5%.
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    Over voltage/under voltage load protection with GSM alert
    (AIKTC, 2021-05) Qureshi, Tahoora; Khan, Asraf Anees (18DEE10); Momin, Hashir Raza Nasir Hussain (18DEE16); Sayyed, Mohd Auf Waqas Ahd. (18DEE24); Shaikh, Adil Mushtaque (18DEE26)
    This project aims to build a system that monitors voltage and provides a breakpoint based low and high voltage tripping mechanism that avoids any damage to the load. Various industrial and domestic systems consist of fluctuation in the AC mains supply. There is a chance of damaging electronic devices that are quite sensitive to these fluctuations. So there needs to be a tripping system that avoids any damage to these loads. This system also includes 8051 microcontroller which finds out the voltage level which is displayed on the LCD screen. This microcontroller not only finds out the voltage level but also send SMS via GSM modem which alerts the user whenever the voltage level is crosses the limits. Our system consists of a tripping mechanism that monitors the input voltage and trips according to limits provides. Here we use a quad comparator IC with two more comparators to be used as window comparators to it. Well the system delivers an error as soon as the input voltage falls out of the window range. This trigger then operates a relay that cuts off the load to avoid any damage to it. We here use a lamp to demonstrate as a load. Well the system is also configured with an alarm that goes on as soon as tripping takes place.
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    Overview to Electrical Substation Automation Using SCADA
    (Proceeding of NCATM-2017, 2017-03-24) Qureshi, Tahoora
    Abstract—“Supervisory control and data acquisition (SCADA) system” is universally accepted means of control for electrical substation which involves continual real time monitoring applicable to generation, transmission and distribution systems. The heart of SCADA lies in the functioning of Remote Terminal Units (RTUs) which collects analog and status telemetry data from field devices and also communicates command signals to them. The inclusion of automation in electrical substation has resulted in a string of advantages including visibility of network operation, flexibility of controls, real time accurate and consistent data, statistical data archiving, faster fault identification, isolation and system restoration. Complex design of SCADA systems involve accurate matching of protocols and communication parameters between connecting devices. This paper aims at establishing a basic understanding of SCADA components, communication protocols and architectures, standards employed and the security risks involved in such systems. Keywords—SCADA, Electrical Substation Automation, Communication Protocols, SCADA standards Organisation, SCADA Architecture.
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    Project Management
    (AIKTC, 2017-09-23) Qureshi, Tahoora
    eCourseware: Semester VI, B.E. Electrical Engineering
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    Project Management
    (AIKTC, 2016-10-11) Qureshi, Tahoora
    eCourseware: Semester VI, B.E. Electrical Engineering
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    Review on secondary and tertiary control structures for Microgrid
    (International Journal of Computer Sciences and Engineering, 2018-03-30) Qureshi, Tahoora; Alvi, Rizwan
    Abstract— With the large scale integration of Distributed Energy Resources (DERs) into the existing power system, there has been a significant impact on the operation of distribution networks; the major impacts being power quality problem along with congestion and voltage regulation issues. This demands coordinated control approaches which allow Distributed Generation (DG) units to actively participate in voltage and frequency regulation. To realize the same, hierarchical control structures constituting the primary, secondary and tertiary control structures are implemented. These controllers are classified as the centralized or the decentralized type. Thus by employing droop controls or impedance based controls desirable outcomes such as power sharing, non linear load sharing and harmonic reduction is possible thanks to coordinated operation of secondary and tertiary control layers with primary or local layer. This paper aims at establishing a basic understanding of these control layers as applied to AC and DC microgrids along with detailed explanation of modified structures from the conventional control structures in a typical microgrid.
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    Tidal power generation
    (AIKTC, 2020-05) Qureshi, Tahoora; Manyar, Kshitija (16EE02); Lanjekar, Maheen (16EE04); Waghamare, Jyoti (17DEE73 ); Borkar, Naaz (14EE01)
    Our project is based on prototype Tidal Barrage. Water is filed manually in the sea side section of the tank to represent the high tide until the water reaches the maximum height a gate is used to block the water once the gate is opened the water flows throw the turbine into the lagoon section. The turbine rotates the rotor of the dynamo to generate dc output and the water level equalizes then the water is poured in to the lagoon section to represent low tides and the gate is closed until the water reaches the maximum height the gate is opened and water flows through the turbine in the reverse direction again to generate DC output. This project is about Tidal Power Generation which mentions the method of utilizing tidal power to producing electricity. This project focuses on the potential of this method of generating electricity and why this could be the common way of generating electricity in future. Now, new energy technologies (NOT dams) that generate electricity from tidal currents could help produce as much electricity as the largest hydroelectric dams or nuclear and fossil fuel generating stations, without producing greenhouse gases or harming the environment. Our project synapsis also gives brief information of construction, basic components and types of tidal power plants. Information regarding turbines used in tidal plants are also given. Advantages and disadvantages of tidal power plant is also discussed. Renewable like this (tidal energy) can be used to decrease global dependence on natural resources, and tidal power can be the primary form of renewable power utilized. Built upon stream turbine and tidal barrages knowledge, tidal turbines draw on innovative technology and design to operate on both the inflow and outflow of water through them. Tidal power plants are capable of producing reliable and efficient power.
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    Ultra-fast electronic circuit breaker
    (AIKTC, 2021-05) Qureshi, Tahoora; Khan, Mohammed Omair Mohiuddin (18DEE12); Ansari, Mohammed Zeeshan (18DEE15); Momin Mohd Huzaifa, Mohammed Dawood (18DEE13); Akarsh, Akhilesh (18DEE01)
    The outline of the project is to shut down the power supply when it is overloaded. Conventional circuit breaker is based on thermal bimetal lever trip mechanism, which is very slow and the trip time is dependent upon the percentage of overload. Electronic circuit breaker is based on the voltage drop across a series element typically a low value resistor or a CT (current Transformer). The voltage sensed is compared against the preset voltage proportional to the current by a level comparator to generate an output for the Relay or contactor to trip the load. The unit is extremely fast and overcomes the drawback of the thermal type.