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Site identified for 400 kV solar sub-station

Posted by Athbel Joe on December 21, 2013 at 10:40 AM Comments comments (0)

Tamil Nadu Generation and Distribution Corporation (Tangedco) will set up a 400 kV solar power-based substation at Vellalaviduthi near here. It will come up on an area of 50 acres, which belongs to the agriculture department, said S. Bharathi, superintending engineer, Tangedco, Pudukottai.

Talking to The Hindu on Friday on the sidelines of the energy week celebrations, she said that the green energy would go a long way in meeting the energy needs of the district. She said that the Tangedco would set up three more power stations, one each at Gandarvakottai, Ammachathiram, and near the collectorate with 110 kV each.


Wireless device converts 'lost' energy into electric power

Posted by Athbel Joe on November 21, 2013 at 12:05 AM Comments comments (0)

Using inexpensive materials configured and tuned to capture microwave signals, researchers at Duke University's Pratt School of Engineering have designed a power-harvesting device with efficiency similar to that of modern solar panels.

The device wirelessly converts the microwave signal to direct current voltage capable of recharging a cell phone battery or other small electronic device, according to a report appearing in the journalApplied Physics Letters in December 2013. It operates on a similar principle to solar panels, which convert light energy into electrical current. But this versatile energy harvester could be tuned to harvest the signal from other energy sources, including satellite signals, sound signals or Wi-Fi signals, the researchers say.



A Triumph for Indian Innovation : The 1200 kV UHVAC Power System

Posted by Athbel Joe on October 30, 2013 at 12:15 AM Comments comments (0)

India is starved for electricity despite the Indian power system’s present installed capacity of about 162,000 MW. Demand for electricity is growing at an accelerated pace. Peak demand is expected to increase to more than 500,000 MW by 2027 for which installed capacity of about 700,000MW is required.

After conducting extensive studies and in the given circumstances the Indian transmission utility, Powergrid felt that a1200kV transmission line would be the most apt for transfer of bulk power efficiently. The electricity transmission capacity of 1200kV system is between 6000 MW to 8000 MW - which is about twice as that of the 765kV system and is about 6 times that of the currently widely used 400kV system.


In a first such initiative in the country, 35 manufacturers have joined hands with Powergrid to establish a 1200kV UHV AC Test Station at Bina, Madhya Pradesh, to initiate development of 1200kV transmission equipment indigenously.  The test line is being constructed with two 1200kV test bays in which the leading manufacturers are providing main equipments such as transformers, surge arresters, circuit breakers, instrument transformers and transmission line hardware and accessories. These test bays and test line shall be used for various field tests/ trials so that the results and feedback can be used for developing field proven equipment as well as to gain initial operational experience. Powergrid is likely to construct 1200 kV Transmission Lines between Wardha and Aurangabad to usher in 1200 kV era in the country.


BHEL develops India's first Ultra High Voltage AC

Posted by Athbel Joe on October 30, 2013 at 12:05 AM Comments comments (0)

The development of the 1200 kV UHVAC transformer is the outcome of two years of rigorous research by the engineers of BHEL. The technology for such leading-edge products is specific and available with very few manufacturers worldwide and is zealously guarded and not available for transfer. BHEL had to develop each facet of the technology through in-house R&D efforts to develop a product that is comparable to the best in the world. The transformer has been manufactured under a controlled environment using the contemporary, state-of-the-art manufacturing and testing facilities at the newly constructed transformer block in BHEL’s Bhopal plant to meet stringent quality requirements for operation of such transformers.


BHEL had signed an MoU with PowerGrid for development of this transformer which is also the largest equipment used in a substation. The 333 MVA, 1150/400/33 kV, single-phase, Auto Transformer successfully developed by BHEL shall be installed in India's first experimental 1200 kV National Test Station at Bina (MP) being set up by PowerGrid.


The Next Generation of Power Conversion Systems Enabled by SiC Power Devices

Posted by Athbel Joe on October 28, 2013 at 1:55 PM Comments comments (0)

A number of factors, including regulatory rules, market demands, and emerging new applications and markets, are driving the development of next-generation power semiconductor devices for use in increasingly integrated, robust 'green' power systems. Silicon carbide (SiC) is quickly emerging as the most viable alternative to silicon due to its wide bandgap properties and superior performance. Along with SiC Schottky barrier diodes (SBDs), ROHM, a semiconductor company, offers SiC MOSFETs featuring higher breakdown voltage, lower ON resistance, and faster switching speeds over comparable silicon solutions, minimizing loss and heat generation for lower system cost, size, and weight.