• A few notes on failure of power system and system restoration techniques thereof

    May 2017 / by S. Roy Barman and Monidipa Roy Barman

    Interconnected operation of modern power systems has increased vulnerability of widespread propagation of any disturbance. It is therefore essential to frame a reliable defense plan. Faulty portion of the system should be quickly isolated or islanded to save the rest of the system. Designing of successful islanding schemes requires consideration of an enormous number of contingencies. Load-generation balance by UFR load-shedding is to be done prior to islanding. Four modes of power system operation is shown in Fig.1. Fig.2 shows possible system problems which causes grid failure. Common sequence of events in blackouts are shown in Fig.3. Grid disturbance has a lot of effects on production, health and safety of the society. In the area of production loss of productivity and loss of product or property observed. In case of health, food contamination, medication problems and anxiety are observed. In case of safety, traffic accidents due to visibility problems and civil unrest due to long power interruption is observed. Any widespread power outage draws a lot of public attention specially from politicians, government agencies e.g Ministry of Power, Electricity Regulatory Commissions, special interest groups e.g consumer, advocates, environmentalists, large customers i.e industries and media. Blackouts may be localized, partial system, full system with outside help and full system without outdide help. Restoration strategy may be different for each type of outage. System separations and blackouts are possible at all loading levels or at all times of the day and year. Heavilily stressed system is more likely to blackout. Prevention is the key to system restoration.

    Wind generated electricity from exhaust mine ventilation fans – a conceptual approach

    May 2017 / by A. K. Mukhopadhyay, Jitender Kumar Saini and Mihir Datta

    The wind power converts kinetic energy in wind to generate electricity. This is done by using wind turbines. The exhaust air driven out to atmosphere by the mine ventilation fan has the potential to drive the wind turbines. The wind turbines will subsequently generate electricity which can be used to lighten the lights of streets, office complex, pumping water etc. The paper deleneates the concept followed by experimental investigations.

    Wind tower technologies and forthcoming advancement

    May 2017 / by K. Bharathy

    Wind Turbine steel tubular tower global leader “Windar Renewable” was founded for Asian market in year 2012 as part of Spain’s denial Alonso Group at Halol, Gujarat, India. Windar is the global leader in supplying both on-shore and off-shore steel tubular towers to wind turbine manufacturers. Other business area includes manufacturers of thermal solar structures to solar industries. Being wholly owned Spanish subsidiary and India’s first 100% multinational tower manufacturing company, windar India is backed by Spanish expertise to deliver high end tower technologies and aims to achieve the status of the only preferred top tower supplier to all leading WTG companies. Windar India has world class tower manufacturing facilities with many SPMs at Hatol, built on an area of 15,000 sqm and has capacity to manufacture around 500 tower sets of 2 MW tower per annum. Besides, the factory has large areas for storages, which provides added value in terms of logistics, as compared to most other tower manufacturing uints in the country. Windar has set up a storage yard of 75,000 square meters, which is capable of storing about 300 sections. Windar has unique facility of gantry cranes in the storage yard to handle and pick any tower sections at any time or seasons. Various customer commitments indicates that the company’s intention of not just using this unit for serving the domestic market but caters to a large number of global clients.

    An overview on the development of renewable energy in India with special reference to Madhya Pradesh

    May 2017 / by Mahipal Singh Yadav, and Ishrat Khan

    An infrastructure is an integral part of service sector and plays a strategic role and makes a significant contribution towards economic and social development. Power is the basic component of infrastructure and it is not only a vital input for industry but also a service provider sector in the daily life of the human beings. Since independence, the expansion of power sector is significant, yet the gap between the demand and supply has always remained a subject of concern for policy makers. The present research paper explains the achievements of the power sector in terms installed capacity, generation of power and forecast demand of power in the country. This paper has also put throw light on the alternative sources of energy and gives an overview on the development of renewable energy of India and explained the future development of power keeping in view the consumption, production and supply of power. A number of studies proved that the major share of power generation in India produced by the conventional energy sources coal and oil based power plants which contribute heavily carbon emission and harmful for sustainable development. This paper also explains the prospects of various sources of renewable energy in terms of small hydropower, wind power and solar power in India and Madhya Pradesh and found that there are a number of renewable energy sites at national and state level for explore to meet the increasing demand of electricity. This paper also examines the policies of central and state governments regarding the renewable energy and their impact on the development of renewable energy.

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