"Hybrid energy storage is currently playing an increasingly important role,
and its role is mainly reflected in power and energy. At present, lithium
battery + supercapacitor is a widely implemented combination method, which is
relatively mature. From the perspective of the entire hybrid energy, hybrid
energy storage, and the entire integrated energy system, it can make our power
system or integrated energy system more flexible and the entire system more
energy efficient."
——Qian Kang, Chief Engineer of Jiangsu Electric Power Design Institute
Integrated Energy Company
Focusing on "double innovation in technology application, a new starting
point for large-scale energy storage", it will accurately connect the global
energy storage market and the global energy storage market in multiple
dimensions by organizing keynote speeches, exhibitions, innovation competitions,
special seminars, project inspections, new product releases, technical exchanges
and other activities. The application helps Chinese energy storage companies
integrate with international standards and builds a communication and
interaction platform for energy storage companies with policy makers, planners,
grid managers, power companies, and energy service providers. From May 18 to 20,
2019, the Zhongguancun Energy Storage Industry Technology Alliance and the
Institute of Engineering Thermophysics of the Chinese Academy of Sciences held
the "ESIE 2019 Energy Storage International Summit and Exhibition", and the
entire event was broadcast live on the Polaris Energy Storage Network and the
Electric Power Toutiao APP.
Qian Kang, Chief Engineer of Jiangsu Electric Power Design Institute
Integrated Energy Company
Thanks to the organizer, I would like to briefly share with you Jiangsu’s
experience and experience in energy storage research and development in the past
year or two. Jiangsu Institute was established in 1958. At present, Jiangsu is
not only the leader in electric power, but also in the entire design
industry.
Recently, several companies in Jiangsu Institute have been transformed into
comprehensive energy engineering companies. Our business extends from outside
the province, including abroad. This is our project in the past year or two. In
fact, looking at the entire energy storage power station and business, the
overall economic and social benefits are quite good. Let’s focus on the
application of energy storage in Tongli, which was reported in various places at
that time. Including Zhongtian’s energy storage, including Zhenjiang’s energy
storage, including Nanjing’s energy storage that is being implemented, etc.
This is the situation related to energy storage. Thanks to Zhongtian’s
trust in us, Zhongtian’s general contracting project has been put into
production in 2017. This is the corresponding award we received.
Let’s briefly review it in three parts.
First of all, we want to emphasize that energy storage is actually an
important part of the entire energy transformation, and energy transformation is
also imperative. From an energy perspective and a climate perspective, changes
must be made. Xi Jinping proposed clean, low-carbon, safe and efficient. We
understand the construction of a smart energy system with electricity as the
center and the power grid as the platform. Why do we talk about electricity as
the center and the power grid as the platform? Relatively speaking, wherever
there are people, there will basically be a power grid, so using the power grid
as a platform is the most basic function.
Energy storage plays a major role in the development of the entire smart
energy system. Energy storage promotes the development of smart energy. This is
the situation of energy storage in the past three years. Starting from 2017, the
user side of the Zhongtian project began to vigorously promote it. By 2018 In
2017, energy storage on the grid side began to play a leading role. This year,
energy storage on the grid side can be said to have a broader world.
The State Grid proposes three types and two networks. We understand that
the most important thing here is to use the resources of substations to build
energy storage data centers and even photovoltaic power stations, and even
distributed energy stations. The multi-station hub type is embodied in the use
of existing substation resources to bring the role of distributed energy storage
into full play.
The following is an idea based on comprehensive capacity planning and
design of energy storage. First of all, energy storage is divided into several
categories. I won’t go into details here. Experts have talked about it before.
We believe that the most important forms of energy storage at present,
especially on the grid side, are pumped hydro energy storage and electrochemical
energy storage, which we value more.
Experts have introduced it before, but what I want to emphasize here is
that it does not matter whether it is on the power generation side, the grid
side, or the user side. Lithium batteries and supercapacitors are currently
recommended, and for users, lithium batteries + flywheels are more
promising.
The role of hybrid energy storage is becoming increasingly prominent at
present, and its role is mainly reflected in power and energy. Currently,
lithium battery + supercapacitor is a widely promoted combination method, which
is relatively mature. From the perspective of the entire hybrid energy and
hybrid energy storage, for the entire integrated energy system, it can make our
power system or integrated energy system more flexible and the entire system
more energy efficient. This list is a list of current cases that have unified
the use of hybrid energy storage in integrated energy systems. The focus is on
Tongli's hybrid energy storage. In addition to lithium batteries and
supercapacitors, Tongli's hybrid energy storage also involves tiered
utilization.
The design of energy storage has been discussed by several experts before.
The key point is, why was Zhejiang Energy Storage able to do so in such a period
of time? Mainly reflected in this idea, the idea of standardized design
optimization, the entire energy storage design adopts a standardized design
model, and its processing is factory-based and installed on site, which greatly
shortens the construction period.
Zhenjiang Energy Storage put the project into operation in a very short
period of time from early design to operation. Mainly reflected in five aspects:
from site selection to equipment selection, to wiring, to the construction
process, including the source grid load storage system, whether it is grid-side
energy storage, the source grid load storage system is a more important
part.
How do we design comprehensive capabilities during the energy storage
design process? Hybrid energy storage is an important part of comprehensive
capabilities, and we understand that comprehensive capabilities involve all
aspects, whether it is energy companies or comprehensive energy service
providers, it reflects how to create a clean, low-carbon and efficient system.
First, build a physical system. The physical system must analyze the current
resources, including the entire comprehensive energy architecture, and build our
information system on this basis. After the information system is completed, a
complete service system is built based on three flows: value flow, information
flow and energy flow. What is currently emphasized is that the service system is
not just for one party, nor is it just for the energy supplier, but a shared
service system, and everyone can use its value-added space on the entire service
platform.
After the service system is constructed, the social mechanism that
ultimately changes the energy usage habits of the entire society is a complete
set of system research. We believe that these four links are integral to each
other and are indispensable.
In the process of comprehensive energy planning and design, energy storage
is the most important one. First of all, I will not talk about the time
relationship before. On the basis of energy endowment, we carry out energy
prediction and balancing. Balancing energy storage involves the most critical ,
the energy storage mentioned here is not just electricity storage, but also
involves heat storage and cold storage. The comprehensive capabilities are
special in this place, not just electrochemical batteries.
Then comes the comprehensive energy system configuration. We understand
that the five possible aspects are based on the entire system architecture. The
temporal relationship does not unfold.
Case sharing, last year in Suzhou for half a year, we first made the Tongli
New Energy Town planning, including energy storage and energy stations, all
planned. Later, due to land issues, the planned system was implemented in April.
In the energy diagram on the left of the 53-acre Nanyang Service Center that we
have seen so far, the thick line in the middle is the main idea of taking
electricity as the center and the power grid as the platform. The biggest
feature of this project is that the green part is the ring network where light,
wind, and energy storage are all based on DC. This is the part that is
highlighted today. We use these technologies to reduce energy consumption and
improve energy efficiency.
In addition to electrical energy storage, there are also foundations such
as heat storage and cold storage. These technologies can improve the overall
energy efficiency of comprehensive energy. The most important thing in 53 acres
of land is hybrid energy storage. In addition to lithium batteries and
supercapacitors, we originally imagined that these two types are different. One
is power type and the other is energy type. After mixing these two types, we can
provide distributed storage. Energy regulatory capabilities. During the
operation, we imagined that the smaller hybrid energy storage would be connected
to 375V DC, and the larger one would be connected to 750V. The two sets
constitute the most important part of Tongli New Energy Town.
The high-temperature phase-change thermal storage combined heating and
cooling device uses self-developed composite high-temperature phase-change
bricks as the heat storage medium to improve our overall energy efficiency.
In addition, compressed air energy storage is different from what I just
talked about. This does not require specific physical restrictions and is not
limited to physical conditions. In the future, the sorting efficiency can be
increased to 130%. Electric heating and cooling are fully embodied in this
system. If everyone is interested, you can search for detailed information
online, including videos and reports.
Finally, let me share with you the multi-station integration we are
currently doing. We want to integrate this energy storage and data center, which
reflects five aspects, including construction, fire protection, overall data,
etc. It is still in progress, and I will share it with you after some follow-up
operations.
An experience: Our energy storage, especially comprehensive energy storage,
plays an increasingly prominent role in comprehensive energy. It is recommended
that everyone pay attention to comprehensive energy storage in the future
research process. Thanks!
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