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Chennai startup comes out with power-saver device for solar units

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New Delhi: In a significant development that could give a big boost to the adoption of solar energy in power-starved countries like India, a Chennai-based startup has come out with a unique device – a dual mode micro-inverter.

Kripya Technologies, a Chennai-based company established by Dr V G Veeraraghavan in 2010, inspired by the 11th president of India late Dr A P J Abdul Kalam, has come out with the cost-saving inverter that functions in on-grid as well as off-grid modes.

“A significant fall in the cost of photovoltaic solar panels has made solar energy a very competitive and viable alternative to fossil fuel-based generators. Despite this, solar energy adoption in developing countries like India has remained puzzlingly low,” said Veeraraghavan, a US-based industry veteran with over 40 years of technology management expertise.

“At Kripya, therefore, we examined the factors that will help increase adoption of solar energy by everyone irrespective of their geographic location and economic status and designed the dual mode micro inverter,” he said.

Typically, an inverter is used to convert the DC power generated by the solar panel into readily usable AC power. The inverters currently available in the market are all designed to function solely, either using power supplied by the grid or expensive battery in off-grid mode, requiring two different sets of devices.

Focusing on solar power units such as rooftop installations, the Kripya team realised that the grid-connected inverters have to depend on the vagaries of power supply as a necessary input for the conversion of DC to AC, while the off-grid inverters rely on very expensive battery storage for storing the electricity prior to conversion to AC.

These are serious limitations for the adoption of solar energy in developing countries like India where the grid power is not always available — and even when it is available, the reliability of grid power is low, Veeraraghavan said.

In addition, the team also recognised that conventional string inverters — connected to a group of solar panels — are not optimal for capacities less than 10 KVA for homes and small offices, due to lower efficiency and perennial load shedding that plagues many cities and towns.

The Kripya team thus conceived and developed the Dual Mode Micro-inverter to resolve these issues and facilitate easy adoption of distributed solar energy generation in developing countries.

Micro-inverters offer the added advantages of modularity, scalability, maximum power efficiency, real time optimisation and superior means for monitoring and control of the overall system.

Kripya has already filed for patent for the dual mode inverter which is easy to install and use in a plug-and-play mode with minimal or no wiring required.

The inverter can dynamically detect and switch modes based on the availability of grid power.

As the available solar radiation and associated photovoltaic energy can change even during the day, Kripya has also developed a micro-processor- based load manager which works in conjunction with the Dual Mode Micro-inverter. The load manager has a feature to segment the loads and assign a different priority to the different load circuits of the solar energy system

During operation, the load manager will automatically manage the segmented load circuits connected to the solar energy system and turn off the non-critical circuits while maintaining the critical circuits on when the available harvested solar energy is less than what is needed for supporting all the circuits.

“Kripya is very proud to have developed the products that offer cost effective means for adoption of solar energy by combining innovation, social and environmental consciousness,” Veeraraghavan said.

(IANS)

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Waves of black as Modi visits Chennai

Tamil Nadu has been in turmoil since the six-week period for setting up the Board expired, with opposition parties and a host of fringe Tamil groups attacking the Centre

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Prime Minister Narendra Modi (FILE PHOTO)

Black flags and balloons and activists in black shirts and trousers greeted Prime Minister Narendra Modi as he paid a whirlwind visit to Chennai with helicopter as the chosen mode of transport in the wake of statewide agitation demanding constitution of the Cauvery Management Board (CMB).

Protests were also held with black flags and placards throughout Tamil Nadu in cities like Tiruchi, Thanjavur, Coimbatore and Tuticorin against the Prime Minister’s brief visit to the state and the Centre’s failure to constitute the CMB despite a Supreme Court order. Black flags were hoisted on homes and business establishments across the state.

Prime Minister, Narendra Modi stressed on the importance of service to others in his last Mann Ki Baat edition for 2017.
Narendra Modi welcomed with black flags in chennai.

In a bid to avoid protesters, Modi, who arrived here by a special aircraft in the morning, chose a helicopter to reach Tiruvidanthai, in neighbouring Kanchipuram district where he opened the 10th DefExpo organised by the Defence Ministry. From there he took another chopper to come to IIT Madras, in the heart of the city. From there, he took a one-kilometre ride by car to the neighbouring Adyar Cancer Institute for an event.

The Prime Minister walked a few steps from the helicopter to the car that ferried him to the Cancer Institute. As he did so, he encountered some 30 students from IIT Madras who stood silently but held posters demanding a Cauvery Management Board as ordered by the Supreme Court — an issue which has whipped up emotions in Tamil Nadu. Modi then left by helicopter to the airport before returning to Delhi.

Also Read: Modi is anti-Dalit, will defeat BJP in 2019: Rahul Gandhi

#Go back Modi trended on top as netizens took to the cyberspace to register their protest against the Central government’s failure to set up the CMB as directed by the Supreme Court to ensure proper sharing of Cauvery waters between Tamil Nadu and Karnataka and other states.

DMK leader M.K. Stalin, who was on a padayatra of the Cauvery delta areas, wore black shirt and trousers as he protested along with state Congress President Thirunavukkarasar and CPI-M state unit chief Mutharasan. “The Prime Minister may be flying in the air today but he has to come down when the elections come,” he said taking a dig at Modi.

A black flag was hoisted at DMK chief M. Karunanidhi’s residence. The ailing leader wore a black shirt. DMK MP Tiruchi Siva and leaders of DMK allies wore black dress and marched on the road near the Chennai airport.

In the morning outside the Chennai airport, activists of the Federation for protection of Tamil Art and Culture, led by noted film director Bharatiraja and other film personalities like Amir, Gautaman and Vetrimaran protested against Modi’s visit. They were arrested.

will also hold a meeting there with the Indian community. Wikimedia Commons
Cauvery River Dispute is going on for a while now. Wikimedia Commons

While MDMK chief Vaiko held a black flag protest in Velachery, Naam Thamizhar Katch convenor Seeman, a film director, was arrested elsewhere. Vaiko called Modi a “coward” for choosing to fly. Political leaders Velmurugan and P. Nedumaran were arrested from Alandur metro station in Chennai for holding black flag protests.

Tamil Nadu has been in turmoil since the six-week period for setting up the Board expired, with opposition parties and a host of fringe Tamil groups attacking the Centre, saying the BJP was interested only in winning the Assembly elections in Karnataka. Even the hugely-popular IPL cricket matches have been shifted out of Chennai to Pune in view of the disturbances on Tuesday. IANS