How to narrow the gap between domestic and international energy storage
technology?
It is necessary to reform the market mechanism that is conducive to the
development of energy storage, reduce the barriers to grid access for energy
storage systems, allow energy storage to participate in power supply services as
a power source, and compensate for the peak and frequency modulation services
provided by energy storage. At the same time, more flexible electricity price
policies can be formulated to encourage full use of the peak-shaving function of
energy storage through price arbitrage and other methods.
According to the latest updated data from the U.S. Department of Energy's
(DOE) global energy storage database, the global cumulative installed capacity
of battery energy storage in 2015 was 0.74GW, an increase of more than 25% from
2014.
Under the banner of low-carbon and clean development, the global energy
field is in a period of rapid technological innovation, with new technological
advances constantly emerging. In particular, the development of new energy
technologies represented by renewable energy and electric vehicles in recent
years will change the future world energy pattern. However, there are also
difficulties and obstacles on the way for mankind to move towards a new way of
using energy, of which energy storage technology is an extremely critical
link.
Due to the intermittent and fluctuating characteristics of renewable
energy, the grid will not be able to absorb it on a large scale without energy
storage, and the promotion of electric vehicles also depends on the battery life
and convenience of charging.
Internationally, energy storage installed capacity continued to grow
rapidly in 2015, with the development of battery energy storage being
particularly eye-catching. According to the latest updated data from the U.S.
Department of Energy's (DOE) global energy storage database, the global
cumulative installed capacity of battery energy storage in 2015 was 0.74GW, an
increase of more than 25% from 2014. In addition, projects currently under
construction or under contract are expected to be 0.9GW. By country, more than
half of the world's installed and planned energy storage devices are located in
the United States. The United States leads the world in terms of installed
capacity and growth rate of energy storage.
In terms of policy, countries are paying increasing attention to energy
storage. In early 2016, the United States revised FERC 745, allowing
consumer-side power products and services to enter the retail market and
treating them the same as traditional power generation devices in terms of
compensation. This policy will help increase the return on energy storage
investment and promote the development of consumer-side energy storage. In
addition, some media reported that the German government is also considering
extending the photovoltaic energy storage subsidy policy.
Although the energy density of supercapacitors is still not comparable to
that of battery energy storage, its charging and discharging speed is extremely
fast, charging can be completed in a few seconds, and its cycle times can reach
more than 100,000 times. It has the potential to be widely used in power grid
frequency regulation in the future. As well as in public transportation such as
rail transit and buses. In addition, the orbital energy storage project recently
approved by Nevada in the United States is also worthy of attention. This
project uses rails to transport heavy objects to high places for energy storage.
The principle is similar to pumped hydro storage, which converts electricity
into gravitational potential energy. The difference is that the medium for
orbital energy storage can be solid. In theory, energy storage can be carried
out as long as there is a certain altitude difference.
Energy storage technology has also attracted increasing attention from the
Chinese government. The National Development and Reform Commission and the
National Energy Administration recently issued the "Energy Technology Revolution
Innovation Action Plan (2016~2030)" and also released the "Energy Technology
Revolution Key Innovation Action Roadmap". The action plan clarifies that future
key tasks include advanced energy storage technology innovation, and proposes to
master the key core technologies in each link of energy storage technology,
complete demonstration and verification, and the overall technology will reach
the international leading level, leading the development of international energy
storage technology and industry. The "Notice on Actively Promoting the
Cooperation Model between Government and Social Capital in the Energy Field"
issued by the National Energy Administration in March proposed to encourage and
guide social capital to invest in the energy field. Among them, energy storage
technology has also been included in the scope of PPP promotion in the energy
field.
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