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The generation of energy by conventional systems leads to several environmental issues. Fuel Cell (FC), being a new renewable energy source, has emerged as one of the promising alternatives to obtain clean and efficient energy generation. This paper highlights the power quality enhancement of the grid connected FC through a boost converter and 25 level Cascaded H-Bridge (CHB) Multi-Level Inverter (MLI) using the classical PID controller. To drive the MLI connected to the grid for governing the Point of Common Coupling (PCC) voltage between the FC and the grid, two PID controllers have been utilized. The conventional evolutionary techniques such as Particle Swarm Optimization (PSO) and Squirrel Search Algorithm (SSA) are implemented to tune the PID controllers for dynamic operations. To further enhance the convergence speed of computation and precision of the classical techniques used, an Improved Squirrel Search Algorithm (ISSA) has been proposed in this work. The grid connected power network considered for study here is designed using MATLAB/Simulink environment. Moreover, the system is led to various rigorous voltage sag and swell conditions to test the effectiveness of the proposed controller. A detailed comparison between the conventional PID, PSO, SSA, and proposed ISSA techniques in voltage profile improvement, power quality enhancement, and reduced execution time has been featured. The results obtained highlight the proposed technique’s superiority over the classical methods in terms of improved dynamic voltage response, enhanced power quality, and reduced harmonics. The power quality indices are found out using Total Harmonic Distortion (THD) analysis. The values found out are well within the IEEE-547 indices for the proposed controller, thus justifying its real-time implementation.

Burden statements on non-communicable diseases (NCDs) across the globe suggest that they pose a constant threat to human development. There are two different types of NCD interventions: population-based interventions addressing NCD risk factors and individual-based interventions addressing NCDs in the primary care setting. Most of the individual-based interventions are based on NCD-care models, as opposed to population-based interventions targeting risk factors through independent vertical programmes. We explored the relevant Indian policy documents including the recent National Health Policy 2017, to get an overview of the Indian NCD-care model and to find out how physical activity (PA) promotion stands in the year 2019 in the current policy documents on NCDs. We conducted a review with two perspectives; first to capture the NCD-care models and second to document the PA promotion and its integration in the current NCD-care model specific to the Indian context. Indian NCD programme is an evolving healthcare programme with a definite NCD-care model, where the individual-based and population-based care are thoroughly linked. Despite having good NCD-care policy and methodical planning, PA promotion seems to be lacking in the policy perspective and currently physical inactivity as a risk factor is not considered seriously. The structure of the NCD-care model should be detailed and strengthened by incorporating lessons from other successful NCD models from across the globe. Indian NCD model must provide sufficient scope of interfacing individual care to that of population-based risk factor strategies like physical activity promotion.

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