Mukesh Kumar Kirar

A comparison of Under Frequency Relay based and Frequency Response model based Load Shedding scheme

The power system in Industrial plants is continually prone to unforeseeable contingencies which cause a disparity between power generated and the load demand. Such uncertainties make the system frequency to decay. In this work, frequency response due to load-generation mismatch is simulated. To forestall this dramatic event, under- frequency Load Shedding (UFLS) strategies are adopted. This paper focuses on the traditional Under Frequency Relay based load shedding and the adaptive System Frequency Response (SFR) model based load shedding. SFR model is developed in MATLAB-SIMULINK. Load shedding actions of both methods are simulated and compared in a test system in ETAP software to comprehend frequency response of an industrial system under transient conditions.

Study of stray losses reduction through Finite Element Method

This paper presents modeling and analysis of leakage flux in transformer with and without aluminium shield by Finite Element Method (FEM) to reduce the stray losses. The transformer is simulated on Maxwell 14.0 software. The study describes variation in leakage flux and magnetic flux density with and without shielding and total losses variation with and without aluminum shields on tank walls.

Noble-TLBO MPPT Technique and its Comparative Analysis with Conventional methods implemented on Solar Photo Voltaic System

The energy crisis particularly with developing GDPs, has bring up to a new panorama of sustainable power source like solar energy, which has encountered huge development. Progressively high infiltration level of photovoltaic (PV) era emerges in keen matrix. Sunlight based power is irregular and variable, as the sun based source at the ground level is exceedingly subject to overcast cover inconstancy, environmental vaporized levels, and other climate parameters. The inalienable inconstancy of substantial scale sun based era acquaints huge difficulties with keen lattice vitality administration. Exact determining of sun powered power/irradiance is basic to secure financial operation of the shrewd framework. In this paper a noble TLBO-MPPT technique has been proposed to address the vitality of solar energy. A comparative analysis has been presented between conventional PO, IC and the proposed MPPT technique. The research has been done on Matlab Simulink software version 2013.

Statistical analysis of utility microgrid: For various islanding detection and loadshedding techniques

Solar energy is a green energy and nearly no carbon traces are present. Hence, the growing demand and challenges to meet the electricity requirement even in remote places can be achieved with a solar microgrid. A microgrid when coordinately controlled, can be operated both in grid connected mode and intentional islanding condition. In this paper various synchrophasor assisted control scheme for intentional islanding of utility microgrid are analyzed. Also reviews on various strategies to develop HIL for fast and accurate islanding and coordination control are presented. To overcome generation and demand mismatch study of various centralized adaptive load shedding scheme is investigated.

Transient stability analysis and improvement in microgrid

With the growing demand of electricity, deployment of microgrid is becoming an attractive option to meet the energy demands. However, a grid connected microgrid suffers a crucial stability issues during a fault in utility grid. For stable operation of microgrid during fault in grid, islanding operation is generally adapted. In this paper transient stability of the microgrid is analyzed during fault in utility grid and islanding condition. Due to the low equivalent inertia of the microgrid, rate of change of frequency of the islanded microgrid is very high. Two types of load shedding schemes are proposed to maintain frequency stability in microgrid i.e. Under Frequency Relay Based Load Shedding and power mismatch based Load Shedding and their results are compared. The simulated microgrid comprises a mix of hydro turbine generator, wind turbine generator and a photovoltaic cell as source and the loads consist of a combination of induction motor and static loads. For validating the obtained results simulations are performed in ETAP for five different cases, each incorporating different combinations of generators.

Power balancing in five level inverters

This paper presents a unique control scheme for achieving power balancing in recently proposed multilevel inverter topologies. Moreover, this strategy can be extended to any type of topology and to any number of output levels of multilevel inverter (MLI).Comparisons have been made between the power delivered by sources in two different topologies with and without applying the proposed control schemes. Voltage stress across different switches of both the topologies have been presented during power balancing operation.