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Theses

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20195
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Subject: Electrical Engineering × End date: 2019 × Start date: 2019 × Thesis Type: M.Tech. ×
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    ThesisItemOpen Access
    Performance analysis of self-excited induction generator using MATLAB & its experimental verification
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2019-08) Choudhary, Monika; Goel, S.K.
    Self-excited induction generator offers certain advantages over a conventional synchronous generator as a source of isolated power supply. Main advantages are reduced cost, less maintenance, self protection from short-circuit or overload condition. It is used as variable speed generator for different application such as wind energy conversion, micro-hydro power generation. It can be used to generate constant voltage and frequency if the electrical load is maintained constant at its terminals. Under such operations, SEIG requires constant capacitance for excitation resulting in a fixed-point operation. In this thesis, Experimental investigation of Self-Excited Induction Generator has been done in laboratory. Three-phase SEIG model using Matlab simulink has been developed. MATLAB/Simulink software has been used to analyze the behavior of SelfExcited Induction Generator. Simulink result has been obtained using the developed model. Experimental investigation of Self-Excited Induction Generator condition under different loading conditions has been done using four channel digital oscilloscope. Experimental investigation of SEIG has been done in laboratory. The results obtained in laboratory are very much similar to the MATLAB results.
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    ThesisItemOpen Access
    Analysis of excessive unevenness in load curve characteristics due to solar energy incorporation into grid & the possible solution
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2019-08) Bohra, Vijay; Arora, Sudha
    The global average temperature is rising at significant rate, so is our concern towards it. One of the major contributor to rising temperature, is the green house gases emitted from power sector due to its high dependence on conventional sources like coal and petroleum products. Various measures like incorporating renewable energy into system are being taken to reduce the share of conventional (fossil fuel based) plants in the energy sector. Among renewable sources, solar energy has the highest growth rate (24% growth) due to its universal acceptance features like availability of sun on earth surface, ease of maintenance, ease of installation, no moving parts, negligible pollution level etc. But, with high solar incorporation, a major problem which is foreseen for every country is significant dip in power requirements from conventional energy sources, resulting in dip in their load curve during day time which could decrease the efficiency of these conventional plants (mostly thermal plants) and leads to excessive curtailment of energy due to over generation. A need for such a system was felt where energy could be stored (acting load during peak hours) and released (when there is excessive ramp to reduce pressure from thermal power plants). So, the missing link was searched and energy storage system was found to be a possible solution to the above mentioned problems. Among options like pumped hydro storage, compressed air storage, and battery energy storage, battery energy storage system can be best solution because of its wide availability and applicability. Taking all these things into account, the first part of this thesis work deals with analysis of, unevenness in load curve due to solar energy incorporation. For this, load is varied in a way that resembles a typical load curve, on a SIMULINK model of grid-tied PV system, and the percentage share of load met by PV and grid are recorded and analysed. In the second part, a Battery Energy Storage System (BESS) is designed in SIMULINK as the solution to above problem.
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    ThesisItemOpen Access
    Advanced directional relaying schemes for series compensated transmission lines and distribution networks
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2019-07) Bisht, Dinesh Singh; Saxena, Ravi
    In integrated power systems the direction of fault current is not fixed. A reliable, effective and versatile directional relaying is therefore very important. Voltage and current inversion in series compensated lines leads to mal-operation of conventional directional relays. In distribution lines where potential transformer is generally absent, conventional directional relays cannot be used. This thesis presents two modified directional relaying schemes to address these shortcomings. First scheme utilise the phase change in positive sequence current and magnitude change in positive sequence voltage at fault and pre-fault conditions. It is evaluated through MATLAB simulation for a series compensated line and its performance is compared with conventional directional relaying for different type of fault. This proposed scheme addresses the problems of voltage and current inversion faced in conventional directional relaying. The second scheme utilise only the post fault current to estimate the fault direction. Hence, it is an attractive method of directional relaying in distribution networks but equally applicable for transmission lines. Performance of this technique was assessed using simulated models of transmission and distribution lines on MATLAB for different operating conditions; like change in the power flow direction, effect of fault resistance, effect of fault location, level of compensation etc.
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    ThesisItemOpen Access
    Modeling and performance analysis of PV module
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2019-08) Sanjay Kumar; Saxena, Ravi
    Energy production from solar energy sources is accelerating due to increase in oil prices, depletion in fossil fuel reservoir and environment change concern. Solar energy is environment friendly, reliable, clean and most promising energy resource among renewable energy options. Photovoltaic module composed of the series and parallel connected solar cell to meet requisite level of voltage and current at consumer end. Photovoltaic module’s performances are mainly depends on environmental conditions such as irradiance and ambient temperature. The main emphasis of the thesis is to be placed on photovoltaic system, modeling and simulation of PV module. A PV module has been implemented in MATLAB/Simulink environment to predict modeled PV module performance. This thesis discusses the effect of temperature, irradiance level, series resistance and shunt resistance on the performance of modeled PV module.
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    ThesisItemOpen Access
    Modeling, simulation and IoT based real-time monitoring of an electric vehicle
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2019-03) Rohit Kumar; Saxena, Ravi
    Electric vehicles (EV) use electric motors and motor controllers powered by rechargeable battery packs for their propulsion. It offers several advantages over conventional petrol/diesel cars as they have sustainable and cleaner energy emissions in transportation and lower running cost. In the first phase of study, Simulation is performed in LabVIEW and the results are plotted. The torque, power, distance travelled and depth of discharge variations were used to determine the energy flow and performance of EV.SIMULINK based EV Model was to study the performance of the SRM drives for electric vehicles under abnormal conditions such as open and short circuit faults. The speed, torque, fluxes and state of charge (SOC) were usedto analyze the performance of SRM driven electric vehicle. The concept of solar hybrid e-rickshaw is an important step toward sustainable green transportation system. In this work, the E-rickshaw with solar photovoltaic panel is simulated both with single and simultaneous battery packs. Li-ion battery pack shares higher energy density and more SOC decline as compared to lead acid battery pack under dynamic conditions. The results signify the possibility of implementing simultaneous battery packs at reasonable cost price. In this thesis, an IoT based realtime monitoring system is successfully tested, validated and implemented.