Editor's note: During construction of wind power, construction focus and workload of the project are mainly reflected in the fan installation work. In general, the crawler crane serves as the protagonist of the hoisting equipment and the truck crane serves as the supporting role. The main task is to complete the cabin, Tower and impeller assembly of the three major components. The following is a professional installation of wind power construction enterprise engineers, based on years of construction experience writing articles, for the relevant readers reference. In recent years, the state has made special arrangements for demonstration projects of new energy sources mainly of wind power, and the scale of wind power generation in China has been rapidly developed. At present, a number of wind farms with installed capacity of 100MW and above have been built or under construction in Jiangsu, Jilin, Liaoning, Guangdong, Inner Mongolia, Xinjiang and Ningxia. Since 1998, our company has entered the wind farm installation market and has completed construction and installation of more than a dozen wind farms and has accumulated some experience in installation and management. We will talk about the installation and management of wind farms in terms of technology and management Experience, I hope to communicate with peers. 1 fan equipment Fan equipment mainly by the base, tower, cabin, wheels, leaves, box transformers, and electrical and other components. Different types of equipment, different weights, tower height difference, while the tower height is generally determined by the distribution of wind height. 2 Requirements for Installation Site At present, there are mainly two types of construction sites for wind farm construction and equipment storage in China. One is to set up temporary storage sites in the field. After arrival, the wind turbine equipment is stored in a temporary warehouse and re-transported to the lifting point during installation. The other is to transport the fan equipment directly to the hoisting site for storage without being transported twice. In order to save the cost of transportation, more and more wind farms use fan equipment once in place. However, this also adds to the need for installation sites, each of which must be capable of storing all the equipment needed for a blower and allowing the location of lifting equipment for both large and auxiliary cranes. Therefore, before the equipment arrives at the site, site planning must be carried out so that the site meets the requirements of the installation of fan equipment. 3 hoisting crane hoisting main cable car mainly by the geographical environment, road conditions, equipment parameters (cabin size, weight, tower height) and other factors. With the growing single-fan capacity, the greater the demand for lifting machinery. In the case of spacious venues and roads, the general use of crawler crane hoisting. However, if the road on the construction site is narrow, we should first consider the use of a tire crane. Because of the use of crawler cranes for hoisting, if the road is narrow, the continuous removal and reinstallation of crawler cranes from one fan to another will delay the construction period and increase the costs. At present, the installed wind turbines are mainly of 1500kW models, such as Rudong in Jiangsu, Dongtai in Jiangsu, Tongyu in Jilin, Fuxin in Liaoning and Hulunbeier in Inner Mongolia. From the current domestic installation of 1500kW fan equipment, generally use 400t or more large crawler cranes or more than 500t tire cranes to meet the lifting requirements. The following is an example of Huaneng Jilin Tongyu Wind Farm: The first phase of Huaneng Jilin Tongyu Wind Farm is a 100MW wind farm with a single unit capacity of 1500kW, a total of 67 units. According to the site environment and the technical parameters of the equipment, it is determined that the on-site installation platform is 50 × 50m2 and the ground pressure is 15t / m2. A total of 3 fan towers, 1 cabin, 3 blades and 1 hub are installed , And to meet the station requirements of a 450t crawler cranes and an auxiliary crane lifting equipment. Based on the equipment parameters in Table 1 and the environmental factors in the field, we have determined that the CC2500 / 450t crawler crane is the main crane. Based on the maximum height of the cabin (about 72m), the length of the boom is determined to be 96m, which ensures that When the impeller is hoisted, the flange of the impeller is in position against the engine room. Equipment for Unloading and Breaking of Wind Farm Equipment for unloading the wind turbine mainly refers to the unloading of large-sized equipment such as towers and engine rooms. The cabin is the most important part of the fan, is the heaviest equipment. According to the technical parameters of the equipment and the actual situation of the site machinery, unloading can be used single or double unloading truck. For example, the Hulunbuir wind farm tower in Inner Mongolia is the heaviest with 40t tower and 54t engine room, so double-deck (one 65t truck crane and one 50t truck crane) is unloaded. Tower crane with a special lifting tool unloading. The cabin is used lifting beam (see Figure 3) and double unloading trucks. 5 Fan equipment Hoisting fan equipment Hoisting mainly refers to the tower (see Figure 2), cabin, impeller and other large equipment hoisting, of which the most important part is to lift the cabin and impeller (hub and blade combination). The heaviest nacelle crane force is also the largest; leaves the wind area is the largest, so strict on the wind speed, the general requirement wind speed is not greater than 8m / s. In order to consider the convenient and easy operation of the blade hoisting, the position of the crane when considering the nacelle hoisting must meet the requirements of the nacelle as well as the hoisting requirements of the impeller. We generally require that the main crane boom be facing the flange of the cabin (the flange of the hub, see Figure 4), which will make it much easier to lift the impeller in place without the need to move the crane to adjust the position To adjust the position of the cabin), but the crane in place. According to the analysis of the hoisting equipment of wind turbines, the main gantry crane of choice is generally the height of the cabin (the height of the top of the cabin) plus about 20m, if the side of the cabin is hoisted, or the position of the crane should be moved or yawed to satisfy the hoisting of the impeller. , Is the length of the main crane boom required. When hoisting the impeller, it is required to pay attention to the change of the wind speed at any time, and the two blades above are tied according to the technical requirements (see FIG. 5). Each slip takes 5 to 6 people, with the command staff to adjust the elastic. When the impeller is docked with the nacelle, it needs 2 ~ 4 dowels with the proper size for positioning, then slowly loosen the butt joint. Tower lifting, each link bolt torque to "Installation Manual" on the technical requirements to Panasonic crane, the next hoisting work. According to the characteristics of fan tower, in addition to hoisting safety regulations during installation, should pay attention to the following points: ①tower crane before the inspection of all cables within the equipment, and the necessary reinforcement measures to ensure that the cable hoisting process Not damaged. ② tower cylinder operation must be good leakage protection measures, check the power cord. ③ lifting bottom section and the mid-tower, the temporary safety rope fixed to the top of the tower, to ensure the safety of workers up and down the tower, lifting the tower section, the permanent safety rope installed. ④ When the tower is docked, the crane command station shall contact the tower crane on the ground via walkie-talkie and direct crane motion. When the cabin arrives above the tower and the impeller docks with the nacelle, the lifting operation command will be lifted from the ground Command transferred to the tower crane platform command, by its walkie-talkie command crane movements. ⑤ general models require the upper tower and cabin installed on the same day. 6 On-site Construction Management Due to the short installation time and long-term wind power of wind farms, the construction of wind power projects is also characterized by large liquidity, short construction period, long-term operation under strong winds, large differences in conditions of different wind farms, construction conditions Bad and so on. Due to the short construction period, office and accommodation sites generally adopt temporary temporary houses or rented houses to solve the problems, which brings some difficulties to construction management on site. Therefore, the key management personnel should advance to the construction site to collect site construction materials and the surrounding environment and natural environment information, and then take appropriate and effective measures in advance according to the construction features to make full use of local resources to ensure the normal and orderly construction. 7 Construction Management in the Windy Situation Wind farms have the characteristic that they have to work under relatively large wind conditions for a long time. Therefore, it is important to consider that there may be the maximum wind speed during operation or when a large crane is parked. If the condition of the wind is greater than the limit value of parking, the boom must be lowered to the ground in time. If site conditions permit, the boom system should be lowered in the windward direction. Wind and wind changes must be considered in good time and information collected in advance. In order to make timely preventive work, crane arm down after the application of wind anchors do a good job of fixing. Crawler crane transfer, the speed should generally not exceed 500m / h (due to the boom length, cranes prone to accidental rollover), before transferring the bulldozers with driving lanes. During the transfer, the captain of the crawler crane shall be responsible for the command. The front and the rear of the crawler crane shall be supervised by special personnel on both sides of the crawler to ensure that the angle of the crawler does not exceed 3 degrees before and after, and the angle between the crawler and the crawler does not exceed 2 degrees. When the pressure is not enough to lay the road base plate, the night shift to be equipped with lighting facilities. During the construction, observe the weather conditions at any time and notify the captain in time of the strong wind forecast. Crane driver received a strong wind warning should immediately stop working, the hook rose to the highest position, and then lever arm touch the head or the arm placed on the iron bench, turn off the engine, lock the operating room, the evacuation of personnel.
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