Kamal Bansal

A brief history and future aspects in automatic cleaning systems for solar photovoltaic panels

The energy or efficiency produced by solar photovoltaic modules is related with the Sun’s available irradiance and spectral content, as well as other factors like environmental, climatic, component performance and inherent system. These dust, dirt and bird droppings are the major reasons for the solar photovoltaic system underperformance. This paper discusses a comprehensive overview of dust problem and the recent developments made on automated cleaning system for solar photovoltaic modules which give brief overview on techniques like electrical, mechanical, chemical and electrostatic. The main objective of the study is to review the literature on solar photovoltaic module automated cleaning techniques for identifying research gaps in the automated cleaning systems.

Stabilization of triple link inverted pendulum system based on LQR control technique

This paper first discusses the mathematical modeling of a dynamical system consists of triple link inverted pendulum (TLIP) on a moving cart using Lagrangian equation. This model is then used to design a controller based on the LQR method to maintain the TLIP vertically on the moving cart. The stability and controllability of the triple link inverted pendulum system are investigated and the choice of weights in LQR is also discussed. The system is simulated in MATLAB environment and the simulation results establish the satisfactory performance of the LQR controller in stabilizing the system.

Mass and Length Dependent Chaotic Behavior of a Double Pendulum

Abstract In this article, chaotic behavior of a double pendulum (DP) is studied numerically by varying its mass and length. The results are analyzed using time series plot, Poincare map and Lyapunov exponent plot. It is observed that the chaotic tendency of the DP increases with mass and length. However, both pendulums of the DP have varying effect on the Lyapunov exponent. The significance of the present study in the optimization and control of the dynamical systems based on the DP is also discussed.

Operating temperature of PV module modified with surface cooling unit in real time condition

High operating temperature decreases photo voltaic module efficiency. Normal Operating Cell Temperature, NOCT of silicon crystalline is about 49°C as reported. A cooling unit with reverse flow water circulation is designed, fabricated and applied on PV back surface to partially avoid undesirable effect of its temperature increase. This modified module with cooling unit and similar non-cooled modules are installed outdoor identically at University of Petroleum and Energy Studies campus, Dehradun. Installed Normal Operating Cell Temperature, INOCT of both the modules are determined and compared by varying water flow rate from cooling unit. And also water flow rate is optimized to maintain minimum possible operating temperature.

Development of a Damper Control System for Combined Cycle Thermal Gas Power Plant

This paper addresses a technique to solve the problem of heat dissipation in solenoid coil of the solenoid valve which is controlling the hydraulic damper by using pulse width modulation (PWM) switching technique with low frequency. In addition to this damper controlling is achieved via wireless controlling. By using PWM based low frequency switching technique the gas turbine trip will be protected. PWM is achieved by microcontroller and wireless control is done by ZigBee.© 2014 ASME

Trajectory Tracking Control of Robot Manipulators

In this paper a simulink based approach is developed for trajectory tracking of robot manipulator. A robot manipulator is widely used in many industrial application.A robot manipulator moves the end effector to the configuration instructed by the user. The input from the main unit is transformed in to the desired configuration through forward kinematics. This configuration is sent to the robot controller to transform the configuration into joint angles. The simulink model is developed to provide basic block to model kinematics and trajectory tracking of robot manipulator. Availability of such library model of robot manipulator software, where the manipulator controller can be modelled using model library blocks and production can be automatically generated using existing code generators for simulink. In this the desired and the actual trajectory of the end effector under different conditions is shown with the help of MATLAB simulation.

Auto synchronization of photovoltaic fed grid systems

In this paper, an attempt to implement auto synchronization technique using Charge Pump Phase Locked Loop (CPPLL) for grid connected solar photovoltaic system (SPV) has been made. The main aim of this paper is to reduce the phase angle mismatch between the grid voltage and inverter voltage, which in turn would improve the quality of power delivered by eliminating the unwanted islanding condition. The detailed analysis of the system with CPPLL has been carried out using MatLab-Simulink and the compliance of the proposed system with IEEE 929 and ANSI C84.1 standards prescribed for power transfer from inverter to grid has been verified. The system is validated for disturbances affect synchronization and results are presented.

Evaluation of mobility managed reactive protocol AODVMM in a sparsely deployed mobile ad hoc network

Mobile ad hoc networks are characterised by random movement of nodes leading to frequent link disruptions apart from extra overhead to maintain network topology. AODV is a reactive protocol intended to maintain the network topology periodically for a MANET. This work aims to deploy a mobility managed mobile ad hoc network which uses AODV protocol along with the mobility managed MM scheme as proposed to enhance throughput by using MM scheme. The AODVMM protocol is also tested under varying buffer availability conditions and reduced transmission range for varying network sizes and different number of nodes.

Charge Pump Phase Locked Loop Synchronization Technique in Grid Connected Solar Photovoltaic Systems

In this paper, an attempt to design and simulate charge pump phase locked loop method of synchronization in grid connected solar photovoltaic system has been made. Delivery of power with high quality to the grid is of concern in grid connected systems and to ensure the same auto synchronization technique is required. Such a method is proposed and analyzed using MatLab-Simulink and its performance is verified for compliance with IEEE 929 standard prescribed for inverter fed grid systems and IEC 61727 / IEEE 1547 standard for harmonic limitation of grid connected inverters. Keywords: Charge Pump Phase locked loop, IEC 61727, IEEE 929, IEEE 1547, MatLab, Solar photovoltaic array, Synchronization