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In remote locations in India, where the grid is inaccessible, standalone systems can be employed. Due to the abundant availability of solar and wind energy, they are the preferred energy sources in the standalone systems. A battery backup is mandatory as these sources are largely affected by the environmental conditions. Usually, fixed gain proportional-integral controllers are employed to regulate...
The present work demonstrates system for wind-PV hybrid standalone energy system with battery backup. The operation of proposed hybrid system is tested with different DC loads. Battery is connected to a DC bus via simple bidirectional DC-DC converter for maintaining charge of the battery, charging/discharging of the battery and DC link voltage. The hybrid system comprises of solar PV (3.6kW), wind...
This paper presents the state space modelling of doubly fed induction generator (DFIG) for small signal stability assessment. The gains of PI controller in torque and voltage control loop of rotor-side converter (RSC) are optimized by particle swarm optimization (PSO) to improve the dynamic performance of DFIG. These optimized parameters results in improved damping of DFIG and minimizes the oscillations...
The wind power generation is now emerging as most promising renewable energy sources in present power system. Among the different wind turbine generating units, direct drive synchronous generator (DDSG) has now become popular for power generation. This paper presents the state space modeling of DDSG to analyze its impact on power system oscillations for two-area interconnected power system. Eigenvalue...
This paper focuses on simulation analysis of Maximum Power Point Tracking Algorithm (MPPT) for small scale Wind Energy Conversion System (WECS) and Solar Photovoltaic (SP) module for power generation. The existing MPPT algorithms for WECS use DC current as the perturbing variable whereas change in wind speed is detected with the help of change in dc voltage. While in case of Solar (PV) maximum power...
With the increasing penetration of wind power generation into the power system, it is required to comprehensively analyze its impact on power system stability. The present paper analyzes the impact of wind power penetration by doubly fed induction generator (DFIG) on power system oscillations for two-area interconnected power system. The aspects of inter-area oscillations which may affect the operation...
A retrospective case report on the management of a 56‐year‐old man who was diagnosed with Fusarium keratitis with an associated iris fungal nodule. He presented with persistent right ocular pain, redness, photophobia and reduced vision following an injury six weeks earlier. Conservative management with topical antibiotics and intracameral injections was successfully used to treat a rare case of Fusarium...
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