China's large-scale hydropower equipment manufacturing to achieve "triple jump"

Recently, major media have relayed two messages from the National Energy Administration on August 31st regarding the "Rapid Development of China's Large Hydroelectric Units" and "China's Large-Scale Hydropower Equipment Made with Localization." As the core technical equipment in large-scale hydropower stations, the hydro-generator unit involves many complex machining technologies and is one of the most difficult industrial products in the world. China has completed its journey from scratch and weak to strong in a short period of time, breaking the long-term monopoly of this core technology for a few developed countries.

The first hop: to achieve localization "The hydro-generator unit consists of two parts: the hydro-turbine and the generator. The former achieves the conversion of water energy into kinetic energy, while the latter completes the conversion of kinetic energy into electricity, and their levels directly reflect the overall hydropower equipment. The quality of the equipment,” said Zhao Wei, deputy chief engineer of the China Hydropower Engineering Consulting Group, told the reporter that the Three Gorges Dam represented that China’s large-scale hydropower has gradually realized the localization of hydro-generator units.

Before the Three Gorges Project, China’s largest single turbine generator capacity was between 300,000 and 400,000 kilowatts, of which Liujiaxia and Longyangxia alone were 300,000 kilowatts; Lijiaxia alone was 400,000 kilowatts; there was a big gap between the advanced capacity and the international advanced level. (The Daguuli hydropower station built and put into operation in the United States in the 1970s was the world's first hydroelectric generating unit rated at 700,000 kilowatts). In 1996, when bidding for 14 sets of 700,000 kilowatts of the left bank of the Three Gorges Project, our company was only a “contractor” and paid a technology transfer fee of 16.35 million US dollars. 7 years later, when tendering 12 sets of 700,000 kilowatts on the right bank of the Three Gorges Project, Harbin Electric Machine Co., Ltd. (hereinafter referred to as “Ha Motor”) and Dongfang Electric Group Dongfang Electric Co., Ltd. (hereinafter referred to as “Dongfang Electric”) represented The domestic enterprises obtained the manufacturing contracts for eight units, and the main mechanical and electrical equipment of the units achieved localization. By the time the 2007 Three Gorges Underground Power Station 6 units of 700,000 kilowatts were bid, all six units were manufactured by Chinese domestic companies.

Second hop: After reaching the advanced level of the Three Gorges Project, China has successively constructed the Xiaowan and Longtan Power Stations with a capacity of 700,000 kilowatts per unit. It is estimated that the Xiluodu Hydropower Plant with a capacity of 770,000 kilowatts will be put into operation in 2015, and it will begin full-scale entry this year. During the installation phase, the world’s first Xiangjiaba hydropower station with a stand-alone capacity of 800,000 kilowatts. These projects all show that China's large-scale hydropower unit equipment has reached the world's advanced level, Zhao Lan engineer told reporters. At present, the stand-alone capacities of the Wudongde and Baihetan hydropower stations on the Jinsha River are currently estimated to be 850,000 kilowatts and 1 million kilowatts, respectively. This will represent our country's leading position in this field of technology.

It is understood that in large-scale hydropower unit projects, in addition to large-scale mixed flow units in China have reached and lead the world level, China's large-scale tubular units have reached the highest level in the world, where Haji and Dongfang Electric have large-scale flow The unit's design and manufacturing capabilities. The Sichuan Hongyan Power Station (300MW capacity) and the Guangxi Changzhou Power Plant (15 units with a capacity of 40,000 kilowatts each, water head 3-16m, shaft diameter 7.5m) and Guangxi Qiaogong Power Station (8 units each) are under construction. Taiwan's single capacity of 75,000 kilowatts, rated water head 13.8m, shaft diameter 7.5m) provides a high level of large-scale tubular unit equipment, of which the bridge unit's capacity is second only to Japan, and now ranks second in the world.

The third jump: Going out of China's hydropower unit equipment takes a road of “bringing in and going out”. An industry expert has described the development path of hydropower units in China. At the beginning, it was "introduction, backwardness, reintroduction, and backwardness," and then it was transformed into "introduction, digestion, absorption, and reinvention." It has now begun exporting "China-made" hydropower unit products and technologies to overseas countries. Overseas hydropower projects.

According to statistics, in 2009 China's large-scale hydropower equipment product exports reached 61.769 million yuan, an increase of 86.6%. In 2010, China's hydropower unit manufacturers signed a contract for the supply of 10×187,000 kilowatt water turbine generator units and their auxiliary equipment and technical services for the Ethiopian Djibu III hydropower station. This project is the largest installed capacity of hydropower projects under construction in Africa. One. At the same time, it also shows that the design and manufacture of China's large-scale hydropower generating units has begun to receive further international recognition, and can compete with developed countries in the bidding of international hydropower unit projects.

However, experts also stated that China’s large-scale hydropower unit project “goes out” for a short period of time. It is also necessary to continuously improve and enhance it in practice. In particular, large-scale overseas projects often represent the country’s image, and we need to continue to cultivate good internal strength. The high-quality equipment that represents the level of China's hydropower generating units has been spread around the world.

Future: To make up for “short board” and comprehensively promote the equipment of China’s large-scale hydropower units has reached or approached the international advanced level in general, but the level of localization in large-scale pumped-storage unit projects is still not high, and there is still a gap between the advanced international level and the international advanced level. A big gap. Zhang Boting, deputy secretary-general of the China Water Conservancy and Power Engineering Society, told reporters that China's pumped storage units with high water heads, large capacity, and large parts are technically disparities with foreign countries, especially countries with a leading position like Japan.

Pumped-storage generating units have more operating modes and more frequently-used working conditions than general-purpose units. Since 2003, China has accelerated the pace of localization of pumped storage units. Taking Henan Baoquan, Bailianhe of Hubei, Huizhou of Guangdong three pumped-storage power stations as a pilot, the introduction of foreign technology was introduced. Since then, Pushihe, Huanren, Shenzhen, Hohhot, Xianyou and Heikangfeng have adopted six pumped-storage power stations as the follow-up support for the nationalization of national pumped-storage unit equipment. The country regards it as a key point for the development of large-scale hydropower units in the future. “It is expected that the localization level of large-scale pumped-storage units in China will be raised to a new level during the 12th Five-year Plan period,” the experts said.