• Supercritical technology – opportunities in efficient coal-fired power generation for climate commitment – a technical review

    Feb 2018 / by Chittatosh Bhattacharya, M. Ravichandra Babu and Satarupa Satpati

    Economic advancement in current climate change scenario needs to address two key concerns on sustaining affordable energy availability and mitigating emission footprint heralding low carbon economy. Reliable electricity and primary energy supply is key for growth and socio-economic development and in a country like India the options of affordable fuels are more confined to biomass or coal, both in domestic and industrial sectors though there is aggressive development plan envisaged to incorporate grid-interactive and off-grid renewable resources. A long term sustainable carbon dioxide emission reduction plan is incomplete without the present trend in adoption of supercritical fossil fired steam cycle power generation technology to pave the way for Energy Security. The supercritical technology has been adopted worldwide in order to increase efficiency that reduces specific fuel consumption, green house gas emissions, water use and cost of carbon capture, and gradually maturing to achieve higher thermal energy conversion efficiency. It is an established and proven power generation process while around 600 supercritical units operating worldwide and reliability and availability of supercritical units being at par with those of subcritical units.

    Solar photovoltaic, induction generator based isolated hybrid system

    Jan 2018 / by Komal Agrawal and Pankaj Kumar

    Solar power from sun is extracted using the solar photovoltaic (SPV) and the power from wind is extracted using induction generator (IG). Power from both sources is collected on common DC link. Further, the DC value is then applied to the converter to reshape it in pure AC value. This power at final stage is given to the loads those are not connected with the existing main grid. The whole system is simulated in MATLAB for the desired results to achieve the desired goals in stand-alone areas.
    Keywords: Voltage stability, common DC link, MATLAB, SPV, induction generator, wind turbine, isolated, activereactive power

    New clean energy buying option in China: green electricity certificates

    Jan 2018 / by Miao Hong, Alex Perera and Min Yuan

    Businesses and other organizations in China have a new option for buying renewable energy, thanks to a voluntary trading platform for Green Electricity Certificates (GEC) launched this summer. These certificates allow companies to claim the environmental benefits associated with renewable energy generation, even if the electricity from a renewable power plant does not feed directly into the company’s facilities. Still in its early stages, China’s GECs program is one step in a larger reform of national energy markets aimed at offering more ways for large energy buyers to purchase renewable energy at scale. As of September 20, China’s GEC trading platform had issued 8 million certificates, corresponding to 8 billion kilowatt hours (kWh) of on-grid wind and solar electricity, equivalent to what Beijing’s residents consume in five months. This initial phase includes certificates only for onshore wind power and ground solar photovoltaic (PV) projects. So far, 1,552 individuals have purchased 1,900 GECs and 46 businesses and organizations have bought 19,097 GECs. While the number of GECs purchased is still small, it is a market worth tracking as it evolves.

    Power generation after Paris – a note

    Jan 2018 / by Amar Nath Bhadra

    The power sector in India is crucial and has taken a new dimension after Paris Agreement, which has been entered into effective from 4th November 2016. The electrical power generation remains a key factor for inclusive growth and is contingent upon delivery of reliable power from the power sector in view of climate change. The development drive in India obviously leads to an era of high energy demand that are yet to be met in spite of total generating capacity of 330 GW. The rapid depletion of fossil fuel reserves, growing concerns on global warming and increasing indications of climate change due to enhance emissions of GHGs from the power sector has forced us to be more seriously concentrating on ensuring Energy Security and sustainable development in the long run. The concept of Energy Security was evolved from a narrow dimension of stable supply of oil products through integration of other sources of energy, emphasizing on sustainability. The most relevant attributes of our Energy Policy is to secure stable, environment friendly, non-disruptive, affordable, resilient, clean energy supply for all 24 × 7 to core sector of economy into the National and Smart Grids, with renovated transmission corridors. New and innovative approaches in the promotion of electricity generation, broadening its scope beyond traditional boundaries, increasingly diversifying the basket of energy mix, incentivising the distributed generation from the local resources, integrating locally available renewable, and decreasing import dependence are the various reinforcements of the long term sustainability of the energy supply. All the suggested attributes on sustainability and energy security may take the shape and style of a mass movement in India, when the process of infusion is routed through the creation of more and more jobs for the young generation and creating a culture of attaining greater heights through mutual co-operation and boosting economic growth.

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