On December 3, the final draft of the photovoltaic international standard proposal IEC TS 63349-2 "Photovoltaic Direct Drive Electrical Controller Part 2: Operation Mode and Display" led by Gree Electric received high votes in IEC/TC 82 Passed, according to the process standard, it will be officially released in February 2022, which marks another new breakthrough for Gree Electric in international standardization work.
In the context of the "double carbon" goal and based on years of research on photovoltaic technology, Gree Electric has innovatively launched a "zero-carbon source" air conditioner using a photovoltaic direct-drive controller, turning air conditioners from a "big power consumer" to a "big power consumer". "Low Carbon Pioneer", this product combines photovoltaics with energy storage to reduce building energy consumption by using clean energy, thus providing new ideas for the transformation of my country's energy structure.
Deeply engaged in the photovoltaic direct drive electrical appliance industry, and constantly making new breakthroughs in the field of international standards
It is understood that the draft of IEC TS 63349-2 "Photovoltaic direct drive electrical appliance controller Part 2: Operation mode and display" which has just been passed with a high vote has been finalized. Draft (DTS) is the first international standard for the photovoltaic direct drive electrical appliance industry. After the international standard is officially released, it will fill the gap in industry standards and provide a basis for the design, testing and certification of photovoltaic direct drive electrical appliances.
IEC/TC 82 Solar Photovoltaic System Technical Committee is an authoritative international standards organization for solar energy and photovoltaic power generation technology. It currently includes photovoltaic terminology, centralized photovoltaic modules, photovoltaic systems, non-concentrated photovoltaic modules, photovoltaic balancing components, photovoltaic cells , photovoltaic 7 standardization working groups including support components. The WG 6 working group of IEC TS 63349-2, led by Gree , is responsible for the standardization of balancing components of photovoltaic solar systems. A total of 18 member states participated in the voting for the final draft of IEC TS 63349-2, and 17 countries voted in favor, with a voting pass rate of 94.4%.
IEC TS 63349-2 standard proposal defines the operating mode of photovoltaic direct-drive electrical controllers, and also standardizes the display requirements of the controller interface, which helps manufacturers establish a unified human-computer interaction interface, allowing users to interact with different manufacturers. The working status of the photovoltaic direct drive appliances produced can be clearly understood, and the appliances can be controlled according to needs. The
"standard proposal has gone through the initial conception of the proposal at the Chicago meeting in May 2018, the first draft presentation of the proposal at the Busan meeting in South Korea in October 2018, the improvement of the proposal outline at the Zhuhai meeting in May 2019, and the unanimous approval of the proposal at the Amsterdam meeting in the Netherlands in December 2019 Afterwards, the project was finally approved with a high vote. Then a project team composed of experts from China, the United States, Germany, Canada, Japan, Thailand, etc. was established. After many discussions and modifications at working group meetings and PT meetings, it was finally approved in December this year. The final draft of the draft will be voted on in March,” said the person in charge of Gree.
(The picture shows the operating principle of Gree's photovoltaic (storage) air conditioning system)
In addition, another international standard proposal IEC 63349-1 "Photovoltaic direct-drive electrical controllers Part: General requirements" led by Gree was also published in October 2020. The project approval phase passed with a high vote. IEC 63349-1 mainly stipulates the requirements for the connection between the photovoltaic direct drive electrical controller and the power grid, the coordination requirements of the various components of the photovoltaic direct drive electrical controller when controlling the operation of the photovoltaic system, and the requirements for the photovoltaic direct drive electrical controller to control the photovoltaic system to achieve various tasks. Transition time limits and response rate requirements when switching operating modes, as well as energy efficiency requirements for photovoltaic direct-drive electrical controllers, etc.
Gree’s ability to lead the formulation of two international standards for photovoltaic direct drive appliances is inseparable from its years of intensive work in the photovoltaic direct drive appliance industry. In the context of the "double carbon" goal, Gree Electric hopes to lead the industry through high standards and accelerate the use of clean energy in the HVAC industry. The intention of reducing building energy consumption is obvious.
Use clean energy to promote energy conservation and consumption reduction in the construction field
my country has proposed carbon dioxide emissions to strive to reach a peak before 2030, and strive to achieve the goal of " carbon neutral " before 2060, which not only reflects our country's progress in environmental protection and Responsibility for addressing climate change will also help my country promote ecological civilization, green and low-carbon development, and enhance its international influence. It is a major strategic decision with huge impact.
Compared with the world's major carbon-emitting countries, taking into account my country's population, development speed, economic scale and resource endowment characteristics, my country is faced with a large scale, heavy tasks, tight time, and high-carbon fossil energy to achieve the goal of "carbon neutrality". The proportion is too high, the energy utilization efficiency of is low, and the energy consumption of is high. In particular, my country's energy structure is dominated by high-carbon fossil energy, accounting for about 85%, of which coal accounts for 57%.
Currently, the world is facing crises caused by energy shortage, climate warming, environmental pollution and other issues. Under the background of "dual carbon" and "dual energy consumption control", a global green and low-carbon transformation trend is taking shape, and all walks of life are developing low-carbon technologies, products and solutions.
Specific to the field of building energy conservation, research shows that air conditioning energy consumption accounts for 15% of social energy consumption, and air conditioning load accounts for 30~50% of building peak loads. Air conditioning consumption reduction is the key to building energy conservation. Among them, the use of clean energy is of great significance to the promotion of energy conservation and emission reduction in our country and even the world. This also means that clean substitution on the supply side and electrical substitution on the consumer side will usher in historical development opportunities.
(The picture shows Gree - The "zero carbon source" air conditioning technology developed by Tsinghua University won the award)
In order to respond to the national "dual carbon" strategy and reduce carbon emissions, Gree has further innovated on the basis of photovoltaic storage direct drive variable frequency air conditioners. It developed "zero carbon source" air conditioning technology and stood out among more than 2,100 teams from 94 countries around the world. It won the highest award in the Global Refrigeration Technology Innovation Grand Prix. It is the only Chinese company to win this honor.
It is understood that Gree's "zero carbon source" air conditioner starts from the throttling level, innovates parallel cascade compression refrigeration, makes full use of natural cold sources, and combines photovoltaics with energy storage. Data from the organizing committee of the Global Refrigeration Technology Innovation Competition shows that Gree’s “zero carbon source” air conditioner can reduce carbon emissions by 85.7%.
In terms of photovoltaic storage technology, Gree organically combines photovoltaic power generation technology, energy storage technology , high-efficiency variable frequency multi-connection technology and energy information intelligent management technology, and uses photovoltaics and energy storage to realize DC within the variable frequency multi-connection unit and develop It has developed DC optical storage frequency conversion technology and completed research on key technologies such as three-way commutation control.
This technology has multiple operation modes on and off the grid, which can realize multi-mode operation of the system on and off the grid and free switching. The system does not rely on the power grid and is self-sufficient in electricity. Through the introduction of energy storage units, the intermittency of photovoltaic power generation is eliminated. Adverse effects on the power grid, the system uses electricity to achieve complementary photovoltaic energy storage, and energy can be stored Constant power operation, peak and valley smoothing and other power needs.
In terms of energy storage systems, Gree's zero-carbon source air conditioning system uses Gree titanium, which has the advantages of high safety, long service life, no capacity decay, fast charging and discharging, and wide temperature resistance. In July 2021, at the "Research and Development and Application of Key Technologies for High-Safety and Large-Rate Energy Storage Systems" scientific and technological achievements appraisal meeting organized by China Machinery Industry Federation , Yinlong New Energy "Key Technologies for High-Safety and Large-Rate Energy Storage Systems" Technology R&D and Application" has reached the "international leading" level in the field of lithium titanate electrochemical energy storage technology.
Adhere to technology as an enterprise and promote green and sustainable development with innovative technology
As early as 2012, Gree had launched the "photovoltaic air conditioning" project and began to develop disruptive zero-carbon air conditioning system technology based on clean energy.
In 2013, the photovoltaic direct-drive centrifuge system independently developed by Gree Electric Appliances was identified as "the world's first and internationally leading". This system first realized the seamless integration of photovoltaic power generation and large-scale central air conditioning, opening the central air conditioning "zero electricity bill" "era.
In 2014, Gree developed the photovoltaic direct-drive variable frequency VRF product, further expanding the application of photovoltaics in air conditioning systems to a wider range of fields.
In 2017, Gree G-IEMS local energy Internet system was released to the world. This complete ecosystem that integrates efficient power generation, safe power storage, reliable power transformation, efficient power use, real-time energy control, centralized energy information management, and lightweight interaction will effectively promote the global energy industry to move towards cleanliness and intelligence. Create a new networked energy world.
After years of development, Gree Electric Appliances has persisted in technological innovation. Gree's "photovoltaic air conditioners" have been highly recognized at home and abroad, and have successively won the British RAC Refrigeration Industry Award and the 2017 International Quality Innovation Competition. In 2018, Gree's "research and application of key technologies for air-conditioning photovoltaic storage and DC conversion" was identified by an authoritative expert group as reaching the "internationally leading" level. In the same year, Gree won the China Patent Gold Award for its invention patent "Photovoltaic Direct Drive System and Its Control Method" and used this patent to develop a photovoltaic (storage) DC air conditioning system.
The two photovoltaic direct drive appliance standard proposals led by Gree have once again led the cross-field integration of photovoltaic technology and electrical appliance technology, boosting the application and promotion of photovoltaic direct drive appliances such as photovoltaic direct drive inverter air conditioners in the market.
In this regard, the relevant person in charge of Gree said that Gree's "zero carbon source" air conditioning system can meet the needs of different types of buildings, such as public buildings, factories, schools, shopping malls, offices, hotels, cold storages, etc. The cases that have been applied include Tibet photovoltaic cabins. , Shanxi Datong Energy Revolution Museum and Gree Changsha Base Park, etc. In the first half of this year alone, it has successively won bids for Hebei Xiongan New District Investment Service Center, Jiangsu Jiuli Central HVAC Station, Huijin Commercial Center and other projects. At present, Gree's "zero carbon source" air conditioning system has its footprints in 30 countries and regions around the world, serving more than 8,000 major projects at home and abroad, and continues to promote green and sustainable development with innovative technology.
Chairman of Gree Electric Appliances Dong Mingzhu has publicly stated many times: "Modern industrial manufacturing is the key to achieving green development. Technological upgrades allow our products to not only meet the needs of industry and consumption upgrades, but also achieve energy conservation, emission reduction and environmental protection. , Let China's manufacturing move towards green manufacturing . "
believes that in the near future, under the specifications of international standards for photovoltaic direct drive appliances, photovoltaic direct drive appliances such as photovoltaic direct drive inverter air conditioners that are both safe, reliable and environmentally friendly will be introduced. Thousands of households allow people to enjoy a safe and comfortable life while also making the sky bluer and the earth greener. (Text/Zhao Qiuyue)
