World’s largest floating solar plant connected in China

 By Tom Kenning

China-based firm Three Gorges New Energy, has already partially connected a 150MW floating PV project to the grid, which is likely to become the largest plant globally once fully commissioned. Credit: Ciel & Terre International

China-based firm Three Gorges New Energy, has already partially connected a 150MW floating PV project to the grid, which is likely to become the largest plant globally once fully commissioned. Credit: Ciel & Terre International

Chinese state-owned developer CECEP has completed a 70MW floating solar project – the largest in the world – at a former coal-mining area of Anhui Province, China, in collaboration with French floating solar specialist Ciel & Terre.

The project, spread across 13 separate islets on an area of 140 hectares, was completed in late 2018, with grid-connection, tests and commissioning carried out this month at the project site in the Lianghuai mining subsidence area, Yongqiao District, Suzhou City.

EPC services were provided by China Energy Conservation Solar Technology and the China Energy Engineering Group Shanxi Electric Power Design Institute. A brand new 18km 110V overhead line was also built for the grid connection of the plant, which is expected to generate up to 77,693MWh of electricity in its first year, equivalent to the power consumption of nearly 21,000 households. 

While the complete facility in Anhui is said to currently be the largest floating PV plant on the same reservoir in the world, nearby, China-based firm Three Gorges New Energy has already partially connected a 150MW floating PV project to the grid, which is likely to become the largest plant globally once fully commissioned.

Equipment

The CECEP system was built using Ciel & Terre’s Hydrelio floats, which are locally produced to minimize emissions, optimise logistics costs and offer local employment.

The project uses monocrystalline modules from Chinese manufacturer LONGi Solar, as confirmed by a C&T spokesperson to PV Tech. Central inverters have also been put on stilt platforms on the shoreline of the quarry lake so as not to interfere with neighbouring farm activity. Concrete poles support the electrical installation and 1,500 helical anchors were used for the project and buried at an 8-15 metre-depth to match the water body.

Ciel & Terre has already supplied its floating structure solution to GCL’s 32MW FPV plant in Anhui province. It has also recently supplied a 9.8MW PV project featuring rooftop and floating elements in Cambodia. Tags: chinafloating solarfpvanhuiciel & terrececep

Source: PV TECH

Smart inverters redefine relationship between DERs and the grid

By Kelsey Misbrener | March 12, 2019


SMA Sunny Tripower CORE1 smart inverter. SMA

Inverters of the past simply fed solar power into the grid. Inverters of the future are required to instead dynamically work with the grid to increase its resilience, reliability, safety and security.

‘Smart inverters’ are a more sophisticated version of power electronics that can make autonomous decisions to keep the grid stable and reliable as more distributed energy resources come online. Instead of just feeding power into the grid, smart inverters are capable of having two-way communication with it. Thanks to advanced software, smart inverters can perform specific grid-supportive functionalities related to voltage, frequency, communications and controls, according to IREC’s “Primer on Adopting the New IEEE 1547TM-2018 Standard for Distributed Energy Resources.”

“The primary difference is that smart inverters are programmed to respond to the grid in an automated way such that they not only react when the grid shuts down, but also provide grid supportive functionalities,” said Sara Baldwin, VP of regulatory at IREC. She said the transition to smart inverters is like moving from flip phone to smartphone.

Inverters without these smarts simply shut down after sensing any grid disturbance — a voltage or frequency fluctuation — even if that fluctuation was small and inconsequential.

“The reason why that’s bad is that it causes this sort of whipsaw effect on the power grid where a small disturbance that causes the inverters to trip off can actually make the problem worse in terms of creating more grid disturbance,” said Tom Tansy, chairman of the SunSpec Alliance, a group that helped to develop the updated IEEE standard.

The key to a stable grid is consistent voltage and frequency. Too many tripping inverters on the grid causes instabilities like voltage fluctuations that lead to blackouts or brownouts. An everyday example of the effects of voltage fluctuation is when you turn on a high-voltage appliance, like a vacuum, and the lights in your home flicker.

To avoid harmful voltage fluctuations to the grid due to solar power, smart inverters can ride-through small disturbances (for example, voltage changes), meaning they can switch into standby mode and observe how long the disturbance takes place, then turn off only if the disturbance lasts too long.

“If it takes place longer than the specified time, then yes it’ll turn off. But if the grid corrects itself in the intervening time frame, it’ll just keep on going,” Tansy said.

The proliferation of smart inverters could expand the possible size of the solar market in a big way. Individual distributed energy resources (DERs) will now come equipped with grid-support functionality, so they will be more of an asset to the grid than a burden.

“They’re enabling us to go beyond what was previously conceived to be limits and enabling states to do what California is aiming at doing, which is 100% clean energy,” said Glenna Wiseman, director of the SunSpec Alliance.

Along with communicating with the grid, smart inverters also communicate with the different parts of an individual array. Smart inverters use data communication to comply with Rule 21 rapid shutdown requirements. The communication between the inverter and the rest of the system along the DC power lines allows fire personnel to easily de-energize a home’s solar system in case of an emergency.

The standard


Huawei’s smart string inverters.

The 2018 update of the IEEE Standard 1547 was released last April, with the full rollout set for 2022. But most manufacturers have been developing smart inverters since the introduction of Rule 21 in 2017, said Tansy. A few examples of smart inverter manufacturers are ABB, SMA, Fronius and Delta.

Early adopter solar states California and Hawaii also initiated smart inverter requirements even before the IEEE required it because of the large amount of DERs already feeding into their utility grids.

State regulators will be in charge of implementing the new standard at the state level, in conjunction with utilities that will integrate the standards into interconnection protocols, according to IREC. The solar industry, technology manufacturers, state and federal agencies as well as national laboratories and advocates will also help with the transition to smart inverters.

Baldwin said the issue of legacy systems built with older inverters is a frequent topic of conversations around the updated standard. She doesn’t think these systems will be a problem in most markets, and expects that older inverters will only be swapped for smart inverters when it comes time for replacement.

“However, as the functions of the new inverters are adopted and as they roll out more widely in the system, there may be situations that require older inverters to be either swapped out more quickly or to give an incentive to folks to swap them out, but I am not seeing that happen yet,” Baldwin said.

Software is key to smarts

The not-yet-released Enphase IQ8. Enphase

Enphase is one inverter company that has worked to evolve quickly when it comes to smart inverter technology. Co-founder Raghu Belur said the team realized that inverters can’t just be “a dumb box that sits attached to the grid. You have to think about integration. And the only way to get to integration is by having an inverter that’s software-defined.”

Over the past five years, Enphase has been developing more sophisticated smart inverter solutions. Its most advanced microinverter is the yet-to-be-released IQ8. This so-called ‘software-defined’ inverter not only has all the required attributes of smart inverters, it takes smart a step further by being able to isolate from the grid and form a mini microgrid even without a battery. If a blackout or brownout occurs when the sun is shining, the IQ8 will isolate from the grid and continue powering crucial appliances and tools. Customers can also choose to add storage to these systems, which would mean continuous power even if the sun isn’t shining. The IQ8 uses Enphase’s new software Ensemble to make this inverter feat possible.

Belur said developing increasingly advanced software will keep the industry evolving along with the grid and enable greater solar deployment. But he said this transition won’t come without some growing pains.

“For the last 10 years, a lot of dumb boxes have been installed out there that are not connected and that are not capable of being modified with software. We have had a contrarian view of that from the beginning, and now it’s becoming more mainstream,” Belur said.

Baldwin said smart inverters are a crucial tool in the proliferation of microgrids, which are increasingly important tools for keeping power on during frequent natural disasters and weather events. The updated standard gives special exemptions to DERs in microgrids, also known as intentional islands, that allow them to disconnect from the grid and form an island as long as certain power balance criteria are met, according to IREC.

“The IEEE Standard 2018 update does address microgrids in a more proactive way, which is the first time we’ve seen that in a national standard,” Baldwin said. “I expect there to be much more evolution on that topic going forward and it’ll be an exciting space to take a closer look at.”

Fluid definition

The current required capabilities of smart inverters are outlined in the new standard, but that doesn’t mean it will remain the definition of smart inverters forever. Hybrid inverters connected to batteries add another level of brains to inverter capabilities. If the smart inverter determines it must disconnect from the grid, it can then self-supply power to the home, keeping crucial appliances like refrigerators and dialysis machines running.

“I think over time the definition probably will be adapted to say that if you can support batteries and PV simultaneously and you support autonomous functions and data communication, well that makes you the smart inverter 2.0, or something like that,” Tansy said.

Another emerging concept made possible by smart inverters is system aggregation into a virtual power plant. Aggregation is still in its early stages and not deployed on a wide scale yet, but Baldwin thinks it will be a crucial technique as more DERs are deployed.

“The notion of a virtual power plant is that instead of having lots of little kilowatts here and there that can’t be synchronized or controlled collectively, you have a fleet of DERs that you are able to utilize as needed to respond to real-time grid conditions,” Baldwin said.

Aggregating systems using smart inverters and advanced communication technology would create a more predictable and controllable fleet of DERs and enable the smooth transition to a smart grid with as many solar systems connected as possible.

The one downside to these advanced inverter communications is increased cybersecurity risk. Tansy said the U.S. power grid is evolving from a relatively small Datacom network with few points on the grid where it could be attacked — also known as the attack surface — to one where every distributed energy source is communicating with the grid. This greatly increases the size of the network and the size of the attack surface.

SunSpec is working with Sandia National Laboratories on standards to ensure that cybersecurity risk is minimized as inverters and the grid get smarter.

Policy opportunities

Smart inverters could change the conversation around incentives for feeding power back into the grid. As grid-tied solar becomes more helpful than harmful to the grid thanks to inverter advancements, the possibilities of net metering or other incentive programs could open up in places that phased out incentives or never had them before.

Baldwin said many policy opportunities for smart inverters revolve around reframing DERs as an optimized component of the distribution grid as opposed to a burden, or something that must be “dealt with.”

“We are trying to have as much [distributed resources] as possible on the grid,” Baldwin said. “We are not trying to avoid that scenario, we are actually trying to get as many distributed resources deployed as possible so that we can make our distribution grid as clean, reliable and resilient as possible, while also giving customers and communities the opportunity to meet their own renewable energy goals or carbon reduction goals or economic goals.”

Smart inverters will play a pivotal role in the important work of redefining the relationship between DERs and utilities.

Source: Solar Power World

Understanding bifacial boost

Belgian research institute imec has developed a new simulation framework it says can calculate the expected output of a bifacial PV system. The model could help improve developer understanding of the best system configurations for bifacial, and foster confidence among investors by providing a precise prediction of energy yields.

Bifacial technology has already begun to be deployed in large-scale PV projects and is well on the way to becoming a mainstream module technology – it is expected to represent more than 35% of modules by 2028, according to the International Technology Roadmap for Photovoltaics. However, complications with precisely calculating the energy yield of bifacial systems are still an issue that can deter investors and developers.

Generating electricity from both sides of a module brings several additional factors to the energy yield calculation, such as albedo (light reflection) and shading from surrounding surfaces, which can vary greatly during the day and between systems. These factors make calculating yield more complex, with estimates for the additional generation offered by bifacial panels often placed anywhere between 5% and 20%. the resulting higher margin for error makes bifacial projects more difficult to finance.

Configuration can cause big losses

The non-uniformity of the factors affecting energy generation – such as the fact rear-side illumination can vary greatly between two modules in the same installation – can also lead to higher levels of mismatch, and reduced performance due to non-optimal system configuration. According to imec R&D manager Eszter Voroshazi, the resulting loss in output can be as high as 40%. “The impact of technological and system configuration details on the non-uniformity at the rear side of the modules has a surprisingly important effect,” she said. “Our final goal is to calculate with high precision the bifacial gain at module, string and system level, and enable a multi objective and automated PV power plant design tool in the longer term.”

Imec says its new simulation tool “takes into account the double-sided illumination and the way it is influenced by module frames, system components’ geometry, and varying albedo”. The institute says thanks to optimizing computational flows, its solution can match competitors for speed whilst providing more detailed and accurate information.

The tool, said Voroshazi, can calculate the energy yield of an entire bifacial PV system with a margin of error lower than 5%.

New tool will further reduce cost of solar

The research institute says it expects its model to contribute to further implementation of bifacial PV and reductions in the cost of renewable energy generation.

“Since current energy yield prediction tools for bifacial technology are not so precise, investors do not have a good view of their return on investment, making them hesitant to take the step,” said imec and EnergyVille business development director Philip Pieters. “We are currently in the final validation phase of our simulation framework. Once it will be fully available, it will give PV plant developers more confidence of the achievable bifacial gain, hence allowing easier funding of bifacial power plants.”

Source: pv-magazine.com

WHY YOU SHOULD HIRE AN AUTHORIZED INSTALLER FOR YOUR SOLAR SYSTEM

Now that you’ve made a choice to join the transition to renewable energy, do not forget to make one important decision of choosing the right installer for your system. If you want the most professional and experienced installer working on your project, then you need a certified and permitted installer

WHAT IS AN INSTALLATION PERMIT?

An installation permit is issued by the Electricity Regulatory Authority and allows the holder to carry out electrical installation work.  

The Electricity Regulatory Authority, under Section 10 of the Electricity Act 1999, is among other functions mandated to regulate persons and entities carrying out any electrical installation works on any premises such as homes, offices, shops, industries, schools, hospitals. Such mandate ensures the safety of electricity consumers.  Accordingly under Electricity Act 1999 and the Electricity (Installation Permits) Regulations SI No 19 of 2003 electrical installation. Works may only be carried out by persons with the appropriate electrical worker’s permit issued by the Authority

HOW CAN I TELL WHO HAS A PERMIT?

An authorized Solar installer must hold a valid installation permit. Obtaining a valid installation permit is a legal requirement in the Electricity Regulatory Authority under Section 10 of the Electricity Act 1999. 

A permit issued under the The Electricity (Installation Permits) Regulations, 2003 expires on the 31st day of December of the year during which it was issued. Ensure that your installer has a current permit.

Our 2019
service permit renewed and certified

WHY SHOULD I HIRE AN AUTHORIZED INSTALLER?

Improper installation may result in poor system performance or even safety risks. Here’s why you should use an authorized installer

  • They have completed their training as they must meet all the minimum requirements before being issued the permit
  • They are registered with the Electricity Authority therefore they are more reliable and trustworthy than unauthorized installers.
  • The insurance policy is in place. In case of any problem during or after installation, an authorized installer is able to take care of it as they are covered by insurance unlike unauthorized  installers
  • Be sure of standard services. An authorized installer is in position to deliver quality services, improve the safety of clients and promote consumer confidence as they are working within the law.

World’s largest roofing company just launched a new solar startup

NEW YORK — Standard Industries, the world’s largest roofing and waterproofing manufacturer, announced the launch of GAF Energy, a new company aimed at revolutionizing the adoption of rooftop solar for everyday consumers.

Working in partnership with GAF, a Standard Industries company and the largest roofing and waterproofing manufacturer in North America, GAF Energy will drive scalable adoption of integrated and affordable rooftop solar solutions across GAF’s established distribution network.

The company said in a release that customers will benefit from a streamlined, turnkey approach to going solar when selecting GAF Energy, from planning and financing, to installation and permitting with utilities.

“As the largest global player in roofing and waterproofing, we will reshape the way clean solar energy becomes a reality for everyone,” said David Millstone, co-CEO of Standard Industries. “We believe that roofing is real estate and we see a future with energy from every roof. GAF Energy’s offerings will empower people to put their roofs to work with technology that is attractive, accessible and affordable.”

A GAF Energy official told Fast Company that around 5 million homes are reroofed in the U.S. annually, but fewer than 300,000 get solar power.

That number could increase as GAF Energy empowers roofing contractors across the U.S. with what it calls “a comprehensive and economical approach to solar installations, bypassing the high-cost of customer acquisition most pure solar technology companies face today.”

With dedicated support teams and training for project management, design, permitting and installation of GAF Energy’s integrated solar roofs, local and regional contractors can effectively grow their businesses while meeting demand for more clean and sustainable sources of energy, according to the company.

“We are best positioned to accelerate the growth of residential solar with over a century of waterproofing experience and the largest network of roofing distributors and contractors in the world.  Our team is in the kitchen with the homeowner at the moment a new roof is required: the most perfect time to provide the opportunity to go green. We couldn’t be more excited to have Martin DeBono and a world class team lead the evolution of rooftop solar for years to come,” said David Winter, co-CEO of Standard Industries.

“GAF Energy capitalizes on the historic challenges facing the rooftop solar industry – acquisition and installation costs – and turns them into demonstrable strengths – making it easy for customers to say ‘yes’ to solar rooftops,” said Martin DeBono, President of GAF Energy. “Our product is smart, integrated and economical, and we hope it will mark a fundamental shift in rooftop solar adoption around the world.”

From www.roofingcontractor.com

Largest solar farms in the world

Photovoltaic solar energy is the fastest-growing energy source in the world. Currently China, India, and the US produce the majority of the global solar power, with the Middle East coming on strong. Growth is booming — especially in the deserts of Asia and the Middle East, where huge solar farms are in the process of being built and expanded. To give you a taste of just how rapidly the adoption of solar power is expanding, we’ve profiled five of the largest solar plants currently in operation. Enjoy!

TENGGER DESERT SOLAR PARK

Largest solar farm in the world

worlds largest solar farms tengger desert park

Location: China
Site Area: 43 square kilometers
Output: 1,547 MW
Known as the “Great Wall” of solar power, the Tengger Desert Solar Park is the largest solar farm currently in existence. Located in China’s Tengger Desert, the solar field occupies only 3.25 percent of the arid land in the region.  That might not sound that big, but it’s actually more than 10 times larger than New York’s Central Park, and is capable of producing 1.5 Gigawatts of power, rivaling the power capacity of most nuclear power plants. With plenty of room to expand, we expect Tengger to be a top solar power producer for years to come.

BHADLA SOLAR PARK

Largest solar farm in India

bhadla-solar-farm

Location: India
Site Area: 40 square kilometers
Output: 1,365 MW

The Bhadla Solar Park currently produces 1,365 MW, but that is about to change. The facility is expanding rapidly, and has plans to produce an additional 880 megawatts by March of 2019. Once it reaches full capacity next year, Bhadla will claim the title as the largest solar facility in the world and will help India come closer to its goal of obtaining 17% of its energy from solar power.

LONGYANGXIA DAM SOLAR PARK

Renewable hybrid power with solar and hydroelectric

worlds largest solar farms longyangxia dam park

Location: Tibetan Plateau, China
Site Area: 27 square kilometers
Output: 850 MW
Longyangxia Dam Solar Park was completed in 2015 and is integrated with the facility’s 1,280MW Longyangxia hydroelectric dam. Together the two power sources complement each other. Solar power helps to conserve water usage by the dam, while the hydroelectric dam balances out the variable energy production from solar cells.

VILLANUEVA SOLAR

Largest in North and South America

worlds largest solar farms villanueva

Location: Coahuila, Mexico
Site Area: 24 square kilometers
Output: 828 MW
The Villanueva solar power facility has been growing steadily with the commissioning of the 427 MW Villanueva 1 park and the 327 MW Villanueva 3 park in early 2018. Enel Green Power Mexico, which oversees the plants, continues to add capacity in small chunks, with a goal of reaching 1,700 GWh per year once the facility is fully operational. This facility is part of Mexico’s commitment to supply 35 percent of its electricity from clean sources by 2024.

KAMUTHI SOLAR POWER STATION

Largest solar farm in the state of Tamil Nadu

worlds largest solar farms kamuthi power station

Location: Tamil Nadu, India
Site Area: 10 square kilometers
Output: 648 MW
As of the writing of this post, the Kamuthi Solar Power Station is the sixth largest solar farm in the world. Built in a mere eight months, the plant went online in September 2016. The 2.5 million solar panels at the facility produce enough power for 750,000 people. One cool fact: the facility is cleaned daily by a fleet of robots who are charged by the solar panels they service.

SOLAR STAR SOLAR FARM

Largest solar farm in the US

worlds largest solar farms star park

Location: Rosamond, California
Site Area: 13 square kilometers (5.0 sq mi)
Output: 580 MW
One of the older plants on our list, construction began on the Solar Star power plant in 2013 and was completed in 2015. The facility includes 1.7 million solar panels that can supply electricity to power the equivalent of approximately 255,000 homes. Solar Star hails from California, which leads the US with almost 23GW in solar energy and accounts for nearly 17 percent of California’s electricity supply.

MOHAMMED BIN RASHID AL MAKTOUM SOLAR PARK

Largest planned solar farm under construction

worlds largest solar farms mohammed bin rashid al maktoum park

Location: UAE
Site Area: 77 square kilometers
Output: 5,000 gigawatts planned by 2030
The 213MW Mohammed bin Rashid Al Maktoum Solar Park may pale in comparison to other facilities, but it has big plans for the future. The solar park has planned improvements that are expected to generate 1,000 MW by 2020 and an incredible 5,000 MW by 2030. Not only will it be the largest solar park in the world, but it also will have the world’s tallest solar energy tower. The 260-meter tower is part of phase four of development and will contribute 700MW to the plant’s total output.

Source :digitaltrends.com

Here’s the Largest Solar Power Plant in East and Central Africa

Uganda’s rate of adding solar generated energy to the national grid is increasing by the day as the President, H.E  Yoweri  Museveni, on Wednesday, 9th January, commissioned a 20MW Solar Power Plant, the largest, and first of it’s kind in East and Central Africa.

The plant was developed and installed by Dr. David Alobo, a Ugandan Scientist based in Germany under the auspices of Xsabo Group of Companies in conjunction with Great Lakes Energy Company N.V from the Netherlands.  

The power plant is located in Butiti village, Kabulasoke,  in Gomba District, and it’s completion brings hope to many Ugandans as it is set to offer employment to over 300 people as well as provide power to the neighboring Districts.
The completion of this project is deemed a great milestone for
Xsabo Group of Companies, but an even bigger one for us as we check it off our list of the 2018 successful projects.
The future of renewable energy in Uganda and East Africa as a whole is bright

The Business Advantages of Solar Energy

Companies are harnessing the power of solar because it’s more affordable than ever.

Reduce operating costs – Monthly savings from solar can contribute significantly to your business’ bottom line

Return on investment – Decreased energy bills, tax incentives and grants accelerate your already fast rate of return

Worry-free operation and maintenance – Our extremely reliable solar panels require virtually no maintenance

Go green, make green – Customers want to support businesses that are environmentally responsible

Financing options available – Create a cash-positive project from day one, talk to your installer about financing options


We ensure a worry-free installation anywhere in Uganda and East Africa at large. Contact us on 031 2106599 or email info@allintradelimited.com

Source: Solar World

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