• Studies on phase shifting transformer with particular reference to Indian power system

    Aug 2017 / by S. Roy Barman and Amar Nath Sanyal

    Phase-shifting transformers (PST) have been around the globe in service for more than 60 years but their implementation remains episodic. They are typically used for increasing or decreasing transmission line power flow. For instance, PSTs often compensate for undesirable phase angle differences at given line terminals resulting from highly variable power generation dispatch within a network or between networks. Without them, uncontrolled loop flows could result in weak loading of certain lines and overloading of others, even under normal operating conditions. PST is an important and a very unique device under Flexible AC Transmission System (FACTS). FACTS devices are versatile equipment for controlling the line flows increasing the loadability of the lines, also increase the stability limits with faster response and contain the over voltages on the system. PST is planned for near future in order to meet the new challenges in the grid. This device enables the grid operator to control the loop flows, thus allowing to use the existing system more efficiently, with a higher economic benefit. Installing FACTS control devices has the aim to improve the reliability of the system, thus contributing to avoid blackouts.

    Droughts and blackouts: how water shortages cost India enough energy to power Sri Lanka

    Jul 2017 / by Tianyi Luo

    India is making great strides to aggressively expand its renewable energy capacity. But the country’s power sector remains highly reliant on thermoelectric plants, with high demand for water for cooling. That means that droughts, like the one caused last year by weak monsoons, can shut off the power, hampering the economy and potentially endangering lives. To understand the impact and extent of these shutdowns in the thermal power sector, we compiled and analyzed over 1,400 Daily Outage Reports filed with India’s Central Electricity Authority between 2013 and 2016. We found that water shortage related shutdowns in 2016 cost India roughly 14 terawatt-hours (TWh) of thermal electricity generation, enough to power India’s neighbour Sri Lanka for an entire year.

    Greening the grid: pathways to integrate 175 gigawatts of renewable energy into India’s electric grid

    Jul 2017 / by Special Correspondent

    The use of renewable energy (RE) sources, primarily wind and solar generation, is poised to grow significantly within the Indian power system. The Government of India has established a target of 175 gigawatts (GW) of installed RE capacity by 2022, including 60 GW of wind and 100 GW of solar, up from 29 GW wind and 9 GW solar at the beginning of 2017. Thanks to advanced weather and power system modelling made for this project, the study team is able to explore operational impacts of meeting India’s RE targets and identify actions that may be favourable for integration. Our primary tool is a detailed production cost model, which simulates optimal scheduling and dispatch of available generation in a future year (2022) by minimizing total production costs subject to physical, operational, and market constraints. We use this model to identify how the India power system is balanced every 15 minutes, the same dispatch interval used by power system operators. The results can be used to inform policy and regulatory decisions that support system flexibility and RE investment.

    Ministerial Conference and the Eighth International Forum on Energy for Sustainable Development – Ministerial statement: access to affordable, reliable, sustainable, and modern energy, 11-14 June 2017, Astana, Kazakhstan

    Jul 2017 / by Special Correspondent

    This Ministerial Statement is proposed at the Ministerial Conference “Meeting the challenge of sustainable energy” within Eighth International Forum on Energy for Sustainable Development on 11 June 2017 in Astana. The statement is a non-binding outcome document based on the ministerial dialogues held to enhance the understanding of sustainable energy and possible policy drivers to achieve a common goal on sustainable energy, promote a policy dialogue and provide awareness-raising of different outcomes that could emerge over time. The recommendations and solutions from the Ministerial Statement will be further integrated into a “Manifesto of Values of Expo 2017”, which is planned to consolidate proposals of private sector, governments, academia and environmental organizations, business-structures to create a new model of energy.

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