Why Singapore's savvy approach to solar growth threatens grid stability

Why Singapore's savvy approach to solar growth threatens grid stability

Solar systems have gone from hanging to floating to "urban".

Tiny Singapore has been working very hard to secure energy and has been
exploring solar panel systems that are hanging, floating, and "urban," but
is the grid stable enough to handle these renewable energy innovations?

When researchers installed a $22,000 solar panel system in a penthouse in
Bukit Timah, it not only generated enough electricity to keep 400 50-watt
light bulbs running for day, it also became a testament to Singapore's
increasing ingenuity in scaling up its solar photovoltaic (PV) installations
despite geographical and financing constraints.

Singapore has begun exploring the use of "hanging" solar panel systems like
what was installed in the Bukit Timah penthouse as well as floating PV
systems and energy storage to overcome the challenge of having a small land
area that rules out the creation of large solar farms. The hope is that
these innovations will increase the viability and attractiveness of solar PV
projects as the land-scarce country tries to meet its climate change
commitments and become a clean energy hub in Southeast Asia.

Urban solar plants

One of the promising breakthroughs on the horizon for the Singapore solar PV
industry are so-called urban solar plants. The concept suspends solar panels
from steel ropes and removes the need for large permanent space, which is in
such low supply in the country. Moreover, urban solar plants are designed to
be easy to move, so they might be deployed to an open-air carpark, then to a
new vacant area when needed.

"Installing such a system over an open-air carpark would not only allow it
to absorb the sun's energy, but it would also provide shade for cars. In the
future, such systems could also power electric vehicles," said Dr Thomas
Reindl, deputy chief executive, Solar Energy Research Institute of Singapore
at the National University of Singapore.

Reindl leads four projects to find out how solar energy can be made more
viable in Singapore, including a feasibility study of urban solar plants in
the country. Working with collaborators from organisations such as solar
energy firm Sunseap, he has received $4 million in funding from the
Singapore Economic Development Board (EDB). IE Singapore reckons that if the
urban solar plant project is found to be feasible and scaled up, it could
help lower the cost of solar electricity in Singapore, and lead to an
increase in solar power adoption.

To gauge the potential of urban solar plants, researchers installed a solar
panel system at a Bukit Timah penthouse which generates roughly 20 kilowatt
hours of electricity a day. Frank Phuan, founder and director of Sunseap,
says such "hanging" solar panel systems are ideal for highly urbanised
Singapore where there is limited space even on rooftops.

"Solar systems in Singapore are always competing for space with other
equipment such as cooling towers, water pumps and piping. [A hanging solar
panel system] not only brings tremendous advantages for rooftop
installations, but it also opens new opportunities for example in carpark
covers or temporary use of land areas which are not earmarked for new
developments in the near future," he explains.

Yeoh Keat Chuan, managing director of the Economic and Development Board
(EDB) Singapore, reckons these new solar research projects will enable the
country to tap into the fast-growing regional solar market and strengthen
its position as the clean energy hub in Asia. "The research into
next-generation solar cells and systems, in close collaboration with the
private sector, will also enable Singapore to accelerate its large-scale
adoption of cost-competitive solar energy," he says.

Floating potential

Another way that Singapore is working around its lack of land for solar
farms is to turn to water surfaces instead. Late last year, the country
unveiled the world's largest floating solar panel testbed. Masagos Zulkifli,
Singapore's Minister for the Environment and Water Resources, says the pilot
test of 10 floating PV systems at Tengeh Reservoir is the largest globally
in terms of the number of systems being tested and the amount of it can
produce, which stands at a maximum one-megawatt of energy, enough to power
250 four-room public housing flats for a year.

"Floating photovoltaic systems, those installed over our water bodies, not
only help to overcome land constraints, but also have the potential to
reduce evaporative losses from our reservoirs," he says. "Given our
geography, solar PV systems are a key technology is Singapore's efforts to
harness renewable energy." Zukifli adds that floating PV systems can become
more efficient by using water to cool the solar panels, allowing them to
yield more energy compared to solar panels that are too hot. Singapore is
expected to explore a wider deployment of floating PV systems if the pilot
shows them to be economically viable and environmentally sustainable.

Goh Chee Kiong, executive director for Cleantech of EDB Singapore, reckons
floating PV has become a global trend in the last couple of years, and that
the country would do well to take advantage of the high investor interest
and momentum behind this technological trend.

"We are seeing developments in Japan, China, Europe, the Americas as well,
Australia and even India. What this means is that it is a highly exportable
sector that we want to grow. We are seeing strong interest by various
companies wanting to participate in the floating photovoltaics testbed in
Singapore," he says, citing eight companies involved in the testbed, ranging
from large Japanese and Italian corporations to local small- and
medium-sized enterprises. "The starting point is that we want them to
establish their business hubs in Singapore," adds Goh. "After which then
they will export the knowhow from Singapore, from doing the innovation right
in Singapore."

Rising investor interest

Ramping up investor interest and ensuring the financial viability of solar
PV projects are becoming key priorities for Singapore as interest in solar
PV deployment is forecasted to continue growing, and innovations are
predicted to keep coming.

Installed PV capacity has surged to almost 99.4MWp as of the second quarter
of 2016, up from a measly 0.4MWp in 2008, the Energy Market Authority (EMA)
reveals in a recent outlook report. The regulatory agency reckons
advancements in electricity generation technologies will bolster Singapore's
power sector, including the use of renewable energies such as solar PV. This
is despite the apparent inadequate access to funding for solar generation
companies.

"The main challenge for solar financing in Singapore is the familiarity of
some financial institutions to the solar PV renewable business model and
that unfamiliarity tends to heighten the risk aversion and lessen
competitive financing terms," said Camillus Yang, vice president, corporate
development and finance at Sunseap.
As solar PV penetration soars, especially if Singapore intends to fulfill
its commitments under the Paris climate change agreement, EMA has expressed
concern on grid stability.

Gautam Jindal, research associate at Energy Studies Institute of the
National University of Singapore, says that other electricity markets have
managed this issue by spreading the installation of these resources across
large areas - a tactic that is not available to Singapore. Instead, the
nation should focus its efforts on developing its energy storage systems
(ESS)

Unlocking energy storage

"For geographically small, isolated power systems like Singapore, energy
storage will play a vital role in supporting higher levels of PV
deployment," says Jindal, noting that in 2015, the country opened its
electricity market for ESS by allowing them to bid for offering "regulation"
service to help correct imbalances caused by load variability.

From facilitating demand side management to firming up output from variable
renewable energy sources, ESS can offer many solutions to generators, grid
operators and consumers. This has led Singapore to develop a new policy
framework to govern the application agnostic integration of energy storage
solutions in its electricity market.

"Energy storage has the potential to revolutionise Singapore's electricity
market in the coming years; right from enabling Virtual Power Plants to
facilitating demand response, to increasing number of prosumers with PV
systems on their rooftops," says Jindal. "However, this requires that
Singapore develop a solid framework that provides investors with certainty
and appropriate incentives to consider investing in energy storage
applications that are expected to have the maximum economic value and market
potential."

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Link to Original Article:
http://asian-power.com/power-utility/exclusive/why-singapores-savvy-approach
-solar-growth-threatens-grid-stability

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John Diecker
APT Consulting Group Co., Ltd.

www.aptthailand.com