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From September 22 to 23, China Electrical Equipment Industry Association, China Electrical Engineering Society and China Electrotechnical Society organized many senior experts in the domestic power generation industry to gather in Beijing. The world's largest stand-alone capacity of 700 trillion was successfully developed by Harbin Electric Machinery Co., Ltd. The fully-air-cooled giant hydro-generators have been successfully connected to the grid for research and exchange.
Harbin Electric's independent design, independent manufacturing, independent intellectual property rights of the Three Gorges right bank power station No. 26 full-air cold water turbine generator has been connected to the grid on July 26 this year, and the company successfully developed the world's first 700 MW all-air cold water wheel The generator was put into commercial operation on May 21 this year at the Longtan grid.
Relevant persons from China Yangtze Three Gorges Project Development Corporation and Longtan Hydropower Development Co., Ltd. said that the Three Gorges No. 26 and Longtan units are currently operating normally and meet the design requirements.
Although different cooling methods show different characteristics, it is difficult to quantify and make clear “choice†conclusions, but the structure is simple, the on-site installation and commissioning test is simple, the installation period is short, the operation is reliable, the cost is low, and the maintenance is simple. The obvious advantages of the motor.
"If you can get cold, you will not be cold with water," said Li Renfeng, a former deputy chief engineer of the Yunnan Electric Power Bureau, 79 years old. This old expert has been responsible for installation and commissioning technology for many years in the Three Gorges site and has extensive practical experience.
In the past, as long as more than 600 megawatts of hydropower units in China were used, water-cooled design and manufacturing techniques were used.
Before the contract of the Longtan Power Station was signed, the 14 generators of the Three Gorges Left Bank Power Station were all semi-water cooled. In the bidding process of Longtan Power Station, Harbin Electric and Alstom jointly proposed a plan for the generator to adopt the full air cooling method. At that time, there was still much controversy in the industry about whether the capacity-level generators such as the Three Gorges could adopt full air cooling.
The fundamental point of the design of the all-air-cooled giant motor is to control the temperature rise, stator thermal deformation and heat aging of various parts of the motor with excellent ventilation and cooling measures. To this end, the overall coordination design, optimization and innovation of the electromagnetic calculation, structure, ventilation and cooling system and insulation system of the all-air-cooled motor must be carried out. An expert from the Design and Research Institute of the Yangtze River Water Resources Commission believes that Harbin has mastered a unique set of technologies.
A senior expert in the industry told the reporter that the practice test of the air-cooled unit produced by Harbin Electric Power Co., Ltd. showed that the design and manufacture of the full-air-cooled giant generator of the Three Gorges Right Bank and Longtan Power Station was successful. The close integration of independent research and development, tracking practice and the introduction of technology to absorb and re-innovate is extremely fruitful. It is the valuable experience and the only way for China's motor manufacturing industry to achieve leap-forward development and successfully reach the world's advanced technology level.
Many experts said in an interview that this move marks a major breakthrough in the air-cooling technology of China's hydro-generators. It is an important milestone in the history of hydropower equipment construction in China, ending the history of China's air-cooling technology completely controlled by foreign companies. It broke the monopoly of foreign prices and greatly reduced the manufacturing and maintenance costs of hydropower units.
Some experts even predicted that China will enter a new era of all-air cold water turbine generator operation.
The reporter learned that at present, there are as many as 32 sets of all-air-cooled giant hydro-generators with a capacity of 600 MW and above, which are only manufactured by Harbin Electric, installed in Longtan (7 units) and the right bank of the Three Gorges ( Hydropower stations such as 4 units, Laxiwa (5 units), Xiaowan (6 units), Jinping Level 1 (6 units) and Guandi (4 units).
Harbin Electric's independent design, independent manufacturing, independent intellectual property rights of the Three Gorges right bank power station No. 26 full-air cold water turbine generator has been connected to the grid on July 26 this year, and the company successfully developed the world's first 700 MW all-air cold water wheel The generator was put into commercial operation on May 21 this year at the Longtan grid.
Relevant persons from China Yangtze Three Gorges Project Development Corporation and Longtan Hydropower Development Co., Ltd. said that the Three Gorges No. 26 and Longtan units are currently operating normally and meet the design requirements.
Although different cooling methods show different characteristics, it is difficult to quantify and make clear “choice†conclusions, but the structure is simple, the on-site installation and commissioning test is simple, the installation period is short, the operation is reliable, the cost is low, and the maintenance is simple. The obvious advantages of the motor.
"If you can get cold, you will not be cold with water," said Li Renfeng, a former deputy chief engineer of the Yunnan Electric Power Bureau, 79 years old. This old expert has been responsible for installation and commissioning technology for many years in the Three Gorges site and has extensive practical experience.
In the past, as long as more than 600 megawatts of hydropower units in China were used, water-cooled design and manufacturing techniques were used.
Before the contract of the Longtan Power Station was signed, the 14 generators of the Three Gorges Left Bank Power Station were all semi-water cooled. In the bidding process of Longtan Power Station, Harbin Electric and Alstom jointly proposed a plan for the generator to adopt the full air cooling method. At that time, there was still much controversy in the industry about whether the capacity-level generators such as the Three Gorges could adopt full air cooling.
The fundamental point of the design of the all-air-cooled giant motor is to control the temperature rise, stator thermal deformation and heat aging of various parts of the motor with excellent ventilation and cooling measures. To this end, the overall coordination design, optimization and innovation of the electromagnetic calculation, structure, ventilation and cooling system and insulation system of the all-air-cooled motor must be carried out. An expert from the Design and Research Institute of the Yangtze River Water Resources Commission believes that Harbin has mastered a unique set of technologies.
A senior expert in the industry told the reporter that the practice test of the air-cooled unit produced by Harbin Electric Power Co., Ltd. showed that the design and manufacture of the full-air-cooled giant generator of the Three Gorges Right Bank and Longtan Power Station was successful. The close integration of independent research and development, tracking practice and the introduction of technology to absorb and re-innovate is extremely fruitful. It is the valuable experience and the only way for China's motor manufacturing industry to achieve leap-forward development and successfully reach the world's advanced technology level.
Many experts said in an interview that this move marks a major breakthrough in the air-cooling technology of China's hydro-generators. It is an important milestone in the history of hydropower equipment construction in China, ending the history of China's air-cooling technology completely controlled by foreign companies. It broke the monopoly of foreign prices and greatly reduced the manufacturing and maintenance costs of hydropower units.
Some experts even predicted that China will enter a new era of all-air cold water turbine generator operation.
The reporter learned that at present, there are as many as 32 sets of all-air-cooled giant hydro-generators with a capacity of 600 MW and above, which are only manufactured by Harbin Electric, installed in Longtan (7 units) and the right bank of the Three Gorges ( Hydropower stations such as 4 units, Laxiwa (5 units), Xiaowan (6 units), Jinping Level 1 (6 units) and Guandi (4 units).
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