Department of Electrical and Electronics Engineering

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Author: search.filters.author.Mathur, Hitesh DattSubject: search.filters.subject.Distributed generation

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Now showing 1 - 7 of 7
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    A Simple Approach to Improvement in Performance of UPQCDG in presence of Unbalanced Load
    (IEEE, 2017) Bhanot, Surekha; Mathur, Hitesh Datt; Patel, Ashish
    In this paper, an improved Power Angle Control (PAC) method for UPQC-DG has been proposed for effective compensation of unbalanced loads. UPQC-DG provides a simultaneous solution to power quality and renewable integration. PAC methods have been developed for UPQC-DG to enhance VA utilization of series and shunt APFs of UPQC-DG. In case of unbalanced loads, existing PAC methods result in circulation of reactive power and increased VA loading of UPQC-DG. PAC method proposed in this work, is designed to tackle above-mentioned issues. Also, proposed PAC method is based on Synchronous Reference Frame (SRF) theory, which makes it robust to non-ideal voltages. Performance of proposed PAC method has been tested using real time simulation performed in Opal-RT. Simulation results show superior performance of UPQC-DG in presence of unbalanced and non-linear loads using proposed PAC method.
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    Performance assessment of a distribution system by simultaneous optimal positioning of electric vehicle charging stations and distributed generators
    (Elsevier, 2023-01) Mathur, Hitesh Datt; Mishra, Puneet; Mukherjee, Bijoy Krishna
    Extensive penetration of Renewable Energy based Distributed Generator (REDG) units in a Distribution System necessitates its efficient and optimal applicability. Plug-in Electric Vehicles (PEV) is currently gaining importance steadily in a distribution system due to its environmental compatibility. However, suitable positioning of PEV is a mandate as it increases the overall demand of the system and has appreciable impact on the system's technical performance in terms of losses, voltage profile, penetration level, to name a few. This paper proposes a simple apparent power loss driven technique of Electric Vehicle Charging Station (EVCS) placement along with a REDG unit in a distribution system taking time-driven load models into consideration. The initial State of Charge of the PEV is reformulated taking traffic and weather conditions, proportional distance covered by the electric vehicle and non-availability of EVCS into consideration using Dynamic Fault Tree Analysis and Bayesian optimization techniques. An optimum combination of different sets of PEV with proportional distance coverage is considered. Results are validated on the basis of computation of three REDG assessment indices in comparison with an arbitrary slot of positioning of the above elements
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    Optimal Capacity Estimation and Allocation of Distributed Generation Units with Suitable Placement of Electric Vehicle Charging Stations
    (IEEE, 2021) Mathur, Hitesh Datt; Mishra, Puneet
    The optimal capacity estimation and allocations of Distributed Generation (DG) units along with appropriate placement of Electric Vehicle charging stations (EVCS) makes a substantial contribution in curtailing power losses and improving the voltage stability of a system. In this regard, this paper formulates a multi-objective function to minimize the power losses and voltage deviation of buses in the distribution network. The optimization problem is solved using three different types of optimization algorithms, namely Particle Swarm Optimization (PSO), Grey Wolf Optimization (GWO), and Hybrid Particle Swarm Grey Wolf Optimization (HPSOGWO). To simulate the practical situation, voltage- dependent load and various electric vehicle (EV) charging patterns based on the location of EVCS are considered in this study. Solar photovoltaic, wind turbine, and diesel generator- based DGs are taken into account in this study. The proposed algorithm is tested on an IEEE 33 bus network considering different scenarios. The results obtained show that HPSOGWO provides the most optimal solution among all the considered algorithms, with the least power loss and voltage deviation for all scenarios.
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    Utilizing UPQC-DG to export reactive power to grid with power angle control method
    (Elsevier, 2022-08) Mathur, Hitesh Datt; Patel, Ashish; Yadav, Sisir Kumar
    Unified Power Quality Conditioner with Distributed Generation (UPQC-DG) is combined equipment that not only compensates power quality issues but also integrates distributed generation into the grid. This paper proposes to incorporate additional functionality in UPQC-DG to provide reactive power support to the grid. The proposed functionality enables the UPQC-DG to not only compensate for load reactive power but also to export it to the grid in a controllable and regulated manner. The control method of the proposed UPQC-DG system is based on a combination of Synchronous Reference Frame (SRF) theory and Unit Vector Template Generation (UVTG) and utilizes an additional PI controller to control the reactive power flow to the grid. Since the UPQC-DG in the proposed research handles an increased quantity of reactive power, the work incorporates the Power Angle Control (PAC) method to share reactive power burden between series and shunt Active Power Filters (APFs) of UPQC-DG for reducing the overall rating. The proposed UPQC-DG system is validated using exhaustive real-time simulations in Opal-RT for steady-state and dynamic performance.
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    Enhancement of power system quality using distributed generation
    (IEEE, 2010) Mathur, Hitesh Datt
    The global demand for energy is increasing at a breathtaking pace. This sharp increase in world energy demand will require significant investment in new power generating capacity and grid infrastructure. Considering the present energy scenario and the degrading environmental conditions, distributed generation seems to be a promising option. Distributed Generation generally refers to small-scale electric power generators that produce electricity at a site close to customers or that are tied to an electric distribution system. The power grid is currently facing tremendous changes in the way the energy is produced, transmitted and consumed. The increasing number of actors and the demand for more and more complex services to be provided by the grid exceed the capabilities of today's control systems. This paper gives an overview of the changes that the power system is undergoing and how these affect the aspects of communication, ancillary services, voltage regulation and losses and harmonics.
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    Optimum sizing of PV based UPQC-DG with improved power angle control
    (Elsevier, 2020-05) Bhanot, Surekha; Mathur, Hitesh Datt; Patel, Ashish; Yadav, Sisir K.
    Unified power quality conditioner with distributed generation (UPQC-DG) is a solution to the problems of power quality and integration of distributed renewable sources. UPQC, being a combination of series and shunt converters, can compensate for most power quality issues, but the use of two power converters increases the cost, and hence optimal sizing methods have been proposed in the literature. Sizing of UPQC-DG components, however, requires special consideration of power injected by DG. This paper proposes an optimum sizing method for UPQC-DG based on an improved power angle control (PAC) technique, which shares reactive power burden between series and shunt converters. Apart from optimal-sizing, this paper incorporates Volt-Ampere (VA) limits in the PAC method to ensure the operation of converters within designed ratings under all conditions. The performance of the proposed power angle control method has been tested for a case study system using Controller Hardware in Loop (CHIL), implemented with Opal-RT and Dspace/micro-labbox, and has been found superior to existing methods.
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    A new SRF-based power angle control method for UPQC-DG to integrate solar PV into grid
    (Wiley, 2018-08) Mathur, Hitesh Datt; Bhanot, Surekha
    In this paper, a new synchronous reference frame theory–based power anglecontrol (PAC) method for unified power quality conditioner with distributedgeneration (UPQCDG) is proposed for effective grid integration of solar PV. InUPQCDG, shunt active power filter (APF) feeds power from distributed genera-tor to load, apart from supplying reactive power demand, which leads to increasein VA burden, hence its rating. Power angle control method aims at effective uti-lization of series and shunt APFs through sharing of reactive power to reduceVA burden on shunt APF. Proposed PAC method is based on instantaneousthree-phase power estimation technique, which is simple and robust and utilizesalready available measurements of UPQCDG. Performance of proposed systemis tested in the presence of nonlinear and reactive loads with solar PV genera-tion system. Dynamic performance of system is studied during grid disturbancessuch as voltage sag and swell, solar irradiation variation, and change in load.Effectiveness of proposed method is validated using real-time simulation per-formed in Opal-RT, in which electrical circuit of UPQCDGis simulated on FPGAcomputation engine with submicrosecond time step to emulate real hardwareclosely.