The project planning is large and the sea is improved. It not only tests the function of the wind turbine, but also comprehensively tests the comprehensive strength of the enterprises participating in the construction.
In the past two years, Qinghai has made great efforts to establish a national clean power demonstration Province, with remarkable achievements. The proportion of renewable power installed and power generation has been increasing, and the longest power supply record of 100% clean power in the world, such as "green power 7", "green power 9", "green power 15" has been set successively. In this process, a number of wind power enterprises and projects provide important support.
Recently, our reporter came to the State Power Investment Corporation of the upper reaches of the Yellow River Hydropower Development Co., Ltd. (hereinafter referred to as "the Yellow River company") located in Qinghai to visit the Mohe wind farm funded and built by it. After the project with an installed capacity of 850000kw, which is the largest single wind power project in China, we can understand the current situation of wind power development in Qinghai and the strategic value of wind power in the establishment of a national clean power demonstration province.
No.1
The largest single wind power project, showing multiple meanings
In midsummer, the heat wave swept most of China. However, Gonghe County, Hainan Tibetan Autonomous Prefecture, Qinghai Province is still cool. Driving from the county to the northwest of Qiji Township, there are vast grasslands along the way. As the wind blows by, the grass lowers its head, showing a group of sheep and many unknown wild animals that are eating grass slowly, which is a lively phenomenon. From time to time, the large rape flowers dotted with golden color for the green grassland. Continue to move forward, a huge wind turbine standing in the blue sky and green grass enters the field of vision from far and near, and the slowly rolling impeller adds a little dynamic beauty to the quiet grassland phenomenon. This is the site area of Mohe wind farm.
According to Liu Shuai, the head of booster station of Mohe wind farm, the total installed capacity of the wind farm is 850000kw, which consists of 400000kw project of multi energy complementary integrated optimization project and 450000kw project of Gonghe. The former applies 182 2.2MW wind turbines produced by foreground power. On December 31, 2018, the project was successfully connected to the grid, and the neighboring Naren 100000 kW wind farm was also connected to the grid, with a total production capacity of 950000 kW, which is now the largest one-time grid connected wind power project in the world.
"By the end of June 2019, after several consecutive days of observation, the wind farm has reached an additional output of 950000 kilowatts, with a maximum daily generating capacity of 11.21 million kilowatt hours, which marks the completion of the largest single wind power project in China for grid connected power generation." He added.
As for the developer Huanghe company, another far-reaching implication of the operation of Mohe wind farm is to promote the clean power generation installed share of state power investment group to exceed 50% for the first time.
Shen De, director of the Engineering Department of Huanghe company, told this reporter that in recent years, state power investment group confirmed the policy of building a world-class clean power enterprise with global competitiveness and continued to increase investment. By July 2019, the group's installed capacity of clean power generation exceeded 72.6 million kilowatts, accounting for 50.14% of the total installed capacity, ranking first among the five state-owned power generation groups.
As the holding subsidiary with the highest proportion of new power generation installed capacity under the state power investment group, Huanghe company has not only been the largest photovoltaic power generation operator in the global installed capacity planning for many years, but also nearly 2 million kilowatts of wind power projects have been put into operation.
Relying on Qinghai Province to establish a national clean power demonstration province and national power investment group to build a world-class clean power enterprise, the company is very optimistic about the prospects of wind power development in Qinghai.
"Qinghai has planned two ten million kilowatt clean power bases in Hainan and Haixi, and built two extra high-voltage transmission lines for external transmission, focusing on the development of wind and solar energy resources, which also brings opportunities for us to speed up the layout of wind power business." "Yellow River company has been carrying out research on water, light and wind storage and" new power + animal husbandry "in combination with scientific research institutes and equipment manufacturing enterprises, hoping to break some bottlenecks restricting the development of industry and store technology for the company in the future," Shen said.No.2
Work together to solve multiple problems and ensure efficient construction
It took less than 8 months from the commencement of construction in May 2018 to the completion of grid connection in December of the same year. In the whole construction process, faced with many bad factors, Mohe wind farm can be connected to the grid in a short time, which is not easy.
The reporter learned that the average altitude of the area where Mohe wind farm is located is more than 3000 meters, the average annual temperature is lower than 5 degrees Celsius, the wind conditions are unstable, coupled with the serious shortage of historical wind data pile, which has a negative impact on site selection, construction, operation and maintenance.
Liu Qidong, Secretary of the Party committee and executive director of Qinghai Yellow River Wind Power Generation Co., Ltd., said in an interview that in this case, from the beginning of drawing up the project planning plan, the company will give full play to the advantages of each enterprise participating in the construction, strengthen the coordination and cooperation among various parties, and constantly optimize various operations.
As a complete machine equipment supplier, foreground power has rich experience in project location and unit selection. With Greenwich and other independently developed smart wind farm planning channels, combined with the field exploration of wind energy resource engineers, this enterprise can quickly form the overall planning plan of the project, providing important reference for developers.
"Mohe wind farm is more than 100 kilometers long from east to west, with a span of 30-40 kilometers from north to south, covering a wide area; 447 wind turbines are installed, with a large number of stand points, so it is necessary to consider the influence of the layout of units on the wake from the Perspective of the whole site. It is difficult for general software to calculate so many slots together, and it is also difficult to optimize the layout algorithm. " The relevant person in charge of the solution plan of foreground power Mohe project further explained that, "we use the self-developed tailflow optimization layout model to carry out the overall planning and layout. After adjusting the key parameters such as the row and column spacing of the stands, the staggering share of the front and rear rows of stands, and the layout direction of the stands, we can get the minimum tailflow layout mode that meets the capacity requirements, and then ensure the maximum power generation. "
In the process of construction, handing over is another problem to be overcome. Mohe wind power plant has a large number of units and needs to meet at all times, which requires the equipment supplier to have a high ability of complete material preparation, production arrangement, efficient assembly and logistics delivery.
In this regard, foreground power plans the material capacity of the supplier and the safe storage ability of the production base in advance, sends special personnel to the factory to implement the bottleneck material supply ability, ensures that the production materials are complete in time, and determines the logistics transportation ability in advance according to the production plan.
"In order to provide better support to the wind power market in the northwest region, we also invested the fifth intelligent production base in Gonghe County, Hainan prefecture, Qinghai Province in November 2018, to provide customized intelligent wind turbine products with higher reliability and higher power generation function for regions such as Qinghai." The person in charge of the above prospect power pointed out.
It is worth mentioning here that in view of the low temperature, air pressure and air density, large temperature difference between day and night, high solar radiation intensity, thunderstorm and sandstorm climate and other characteristics in the location of Mohe wind farm, the technical team of foreground power has made targeted planning for the units used, including strengthening the insulation function of electrical components and coolers, using the development experience of high-altitude wind power accumulated for many years. Ventilation and heat dissipation function of.
According to the data provided by Liu Qidong, by the early morning of July 24, all the prospective power wind turbines in operation of the Yellow River company had generated 551 million kilowatt hours, reaching the planned level. Now, the Yellow River company has put into production and under construction wind power projects in Qinghai, and the prospect power supply nearly 1 / 3 of the units.
The person in charge of foreground power told reporters that with regard to the development of wind power in high altitude areas such as Qinghai, the company also launched 2.5MW, 3.0MW and other models to help developers improve their comprehensive income as much as possible, so that they can better cope with the coming of the era of bidding.
Transferring these units from the production base to the wind farm seems to be just a simple transportation process, but in fact, it involves many complex issues such as planning, multi-party harmony, security and so on. For this reason, foreground power increases the input of transportation capacity and escorts, reasonably plans roads, and shortens the transportation cycle from 24 days to 10 days.
However, compared with the implementation of construction industry, a new situation is still unexpected for Huanghe company.
"The second and third quarters are the best time for the construction of Mohe wind farm, and the window period is already short. But last year, the rainfall in Hainan exceeded the extreme since the climate record, and it will gather in July September. At this time, it is just entering the stage of foundation construction. This process needs to be completed within 12 hours. Therefore, the interference caused by sudden climate factors is still relatively large. " When recalling the difficulties encountered at that time, Shen Yuanxin, project manager of new power construction Department of engineering construction branch of Yellow River company, still remembers, "we have worked out a special operation plan and gathered the resources of all participating units to ensure the quality and speed of construction."
Foreground power also actively cooperates with the developer's construction schedule, arranges special technical personnel to guide on site, and ensures that all operations are performed in strict accordance with the standard process. Faced with the situation of few hoisting equipment and poor weather conditions, on the one hand, the company makes great efforts to improve the power of unloading and hoisting and the stability of hoisting by relying on the independently developed new-type hoisting rigging; on the other hand, combined with the wind speed prediction function of Greenwich cloud channel, it will refine the field operation arrangement to minimize the climate impact.
The 850000 kilowatt project was completed in less than 8 months.No.3
Economic and environmental benefits cannot be reduced
Now, Mohe wind farm has entered a five-year warranty period, during which 400000 kilowatt multi energy complementary project is jointly operated and operated by Yellow River company and foreground power, and all supporting facilities and rules and regulations are being improved in an orderly manner.
Liu Qidong told reporters that considering the large area and large number of installed units, the Yellow River company vigorously explored and implemented the mode of "unattended, few people on duty", "joint maintenance and inspection, regional maintenance and inspection" in the operation and maintenance of the wind farm. "It is mainly to comprehensively use multiple sets of advanced intelligent plans to replace manual operation, and then effectively reduce the number of operation and maintenance personnel and improve the operation power."
It is understood that Yellow River company is actively exploring to complete the rapid collection and analysis of information on key positions of the whole site through the online monitoring system of units. In addition, UAV and automatic inspection robot are also expected to be used for power collection and transmission
