Bison Machinery Co., Ltd. , http://www.tzgeneratores.com
China's first 700MW full-air-cooled hydro-generator unit has been put into commercial operation conditions, not only two months ahead of planned power generation, but also created a miracle in the history of world hydropower. To achieve this feat is Harbin Electric Machinery Co., Ltd., a leading company in the electrical industry.
Longtan Hydropower Station is located in the upper reaches of the Hongshui River in the main stream of the Pearl River. It is a large-scale hydropower station after the Three Gorges Power Station. It is a large-scale hydropower project with comprehensive functions such as flood control, power generation and shipping. The first phase of the project installed seven hydroelectric generating units with a single unit capacity/power of 778 MVA/700 MW. With strong comprehensive strength and advanced technology, Harbin Electric has contracted the design and manufacturing tasks of all generators in 2002.
The feat of installing the world's largest air-cooled generating unit at the power station has received wide attention from the world. This advanced technology has been independently developed by Harbin Electric, and after numerous trial and error trials, the unit structure has been optimized several times to achieve the best results.
The Longtan unit has a large overall size and a complicated structure, which is difficult to design, manufacture and install. In order to realize the overall goal of Longtan Power Station's "three-year investment in one year" in 2007, it has put a severe test on whether Harbin Electric Power can deliver on time, even in advance, and do a good job in site service.
According to Fu Changhong, a technical executive of Harbin Electric Power, the unit's ventilation cooling uses a closed self-circulating dual path to the end return air cooling system. According to the similar principle, we designed and manufactured the Longtan generator ventilation model and carried out the real machine simulation test. At the same time, the quality of the ventilation system was analyzed through the test results, and the results of the total air volume and air volume distribution of the generator were derived.
It is understood that Harbin has always been in a highly responsible attitude towards users, and is not only serious and rigorous, but also strives for excellence in implementing technical solutions. After verifying the accuracy of the ventilation calculation through the model test, the structure of the real machine ventilation system is further improved and improved.
In every process, Harbin Electric Power is carefully organized and carefully designed. The production workshops work overtime to carry out the manufacturing and processing of parts. The project management department organizes the delivery according to the construction schedule according to the progress of the site installation, and spares no effort to ensure the parts and components. The delivery schedule meets the installation needs of the site. As a result, the unit was completed ahead of schedule, from manufacturing to manufacturing, which not only ensured product quality, but also gained valuable time for the unit to generate electricity.
The installation work of the unit began on November 28, 2005, and the installation work section was smoothly advanced. The stator was installed on the site on December 1st, and passed the overall withstand voltage test. On December 18, 2006, all the components of the rotor were assembled and tested, and passed the comprehensive inspection and inspection. On December 23, the rotor was hoisted into the pit. Connected to the generator shaft; on February 22, 2007, the unit shaft brake was inspected; on March 23, the installation of the unit and its ancillary equipment was completed, with water filling conditions; the first commissioning was carried out on April 1.
It is well known in the industry that the 72-hour test run is a very important comprehensive test before the unit enters the official power generation. The working state is the same as that of the official power generation. It is used to test whether the system unit is safe and reliable and can run normally for a long time in the case of grid connection with the grid. . The operating status of the unit indicates that Harbin Electric has succeeded in challenging large-scale all-air cold water turbines. The report shows that all the monitoring data are in line with the design and national standard requirements, and the operation is stable.
"The first full-air cold water turbine generator set technology of Harbin Electric is mature, the performance of the product is excellent, and the service quality is first-class." The hydropower unit experts made a high evaluation.
The pioneering spirit of dare to be the first is even more determined by Harbin Electric's determination to "competition first in the country and create world-class". After the Longtan unit, Harbin Electric has successively signed contracts for several large-scale power stations with a capacity of 700MW air-cooled units, such as Laxiwa, Three Gorges Right Bank, Xiaowan, Jinping, etc., which has injected a strong impetus into its subsequent development. .
The world's first all-air-cooled turbine unit Longtan Power Generation
On May 21st, the world's largest air-cooled generator set with the largest capacity in the Longtan Hydropower Station in Guangxi Zhuang Autonomous Region was installed. The 72-hour continuous test run with load was successful, and grid-connected power generation began, marking that "China Hydropower" has already become "World Hydropower". "The forefront."