At present, the single-unit capacity of domestic wind turbines has grown from the initial tens of kilowatts to today's hundreds of kilowatts or even megawatts. Wind farms have also grown from an initial installed capacity of hundreds of kilowatts to large wind farms with tens of thousands of kilowatts or even hundreds of thousands of kilowatts of installed capacity. With the increasing installed capacity of wind farms and the increasing proportion of power grids, the scientific operation and maintenance management of large-scale wind farms has gradually become a new topic. The main task of wind farm operation and maintenance management is to improve the availability of wind turbine equipment and the reliability of power supply through scientific operation and maintenance management, so as to ensure that the power quality of electric field output meets the relevant standards of national power quality. The enterprise nature and production characteristics of the wind farm determine that the operation and maintenance management must be based on safe production, taking scientific and technological progress as the guide, focusing on equipment management, ensuring the overall improvement of personnel quality, and striving to improve the social and economic benefits of the enterprise. .
The main content of the operation of the wind farm
The main contents of the operation of the wind farm include two parts, namely the operation of the wind turbine and the operation of the field boost substation and related power transmission and transformation facilities. Work should be carried out in accordance with the standards of DL/T666-1999 â€œCode of Operation for Wind Farmsâ€.
First, the operation of wind turbines
The daily operation of the wind turbine mainly includes: monitoring the parameters of the wind turbine and the operating status through the monitoring computer of the central control room, and carefully filling in the â€œWind Farm Operation Logâ€ according to the regulations. When an abnormal change trend is found, the operating state of the unit is continuously monitored by the stand-alone monitoring mode of the monitoring program, and corresponding measures are taken according to actual conditions. In the event of a general failure, the maintenance personnel shall be notified in a timely manner to check and handle according to the meteorological conditions at that time, and the corresponding fault handling records and quality records shall be made in the â€œWind Farm Operation Logâ€; for non-conventional faults, the relevant departments shall be notified in time. And actively cooperate with the solution.
The wind farm should establish a regular inspection system. The operating personnel should bear direct responsibility for monitoring the safe and stable operation of the wind farm. The operational status of the wind turbine should be inspected by visual methods such as visual observation on a regular basis. It should be noted that all outbound work (including inspections, start-stop wind turbines, fault check processing, etc.) requires two or more people for security reasons. The inspection work mainly includes whether the wind turbine has abnormal noise during operation, the state of the blade operation, whether the yaw system is normal, and whether there is oil stain on the outer surface of the tower. During the inspection process, according to the recent actual situation of the equipment, the units that have been re-commissioned after the fault treatment should be inspected in a targeted manner, and the units with frequent start and stop should be inspected, and the units with heavy load and high temperature should be inspected, and the disease should be checked. The unit is focused on checking the newly commissioned units. If any hidden troubles are found, they should be reported and processed in time to find out the causes, so as to avoid accidents and reduce economic losses. At the same time, in the "wind farm operation log" to do the corresponding inspection records.
When the weather conditions change abnormally (such as high wind speed, bad weather, etc.), if the unit is not operating normally, the content and number of inspections will be determined based on the current situation. When the weather conditions are not suitable for outdoor inspection, the monitoring of the operation status of the unit should be strengthened in the central monitoring room. The countermeasures are determined by comparing the main parameters such as temperature, output, and rotational speed.
Second, the operation of power transmission and transformation facilities
Due to the special requirements of wind farms for environmental conditions, in general, the natural environment around the electric field is relatively harsh, and the geographical location is often remote. This requires that the power transmission and transformation facilities should be designed to fully consider the impact of severe weather conditions such as high temperature, severe cold, high wind speed, sandstorm, salt spray, rain, snow, ice, lightning and other power transmission and transformation facilities. Under the premise of meeting the relevant standards of the power industry, the selected equipment should strive to achieve reliable performance, simple structure, convenient maintenance and convenient operation for the characteristics of wind power generation. At the same time, fire and communication issues should be addressed in order to improve the safety of wind farm operations.
Because the geographical distribution of the power transmission and transformation facilities of the wind farm is relatively scattered, the equipment load changes greatly, the regularity is not strong, and the meteorological conditions are often harsh when the equipment is under high load operation, which requires the operating personnel to perform in the daily operation. Strengthen the intensity of inspections. When inspecting, it should be equipped with appropriate detection, protection and lighting equipment to ensure the normal operation.
The following standards shall be implemented for the operation of transformers and ancillary facilities, power cables, overhead lines, communication lines, lightning protection facilities, and boost substations in the wind farm area:
SD292-1988 "Operation Procedures for Overhead Distribution Lines and Equipment (Trial)"
DL/T 572-1995 "Power Transformer Operation Regulations"
GBI4285-1993 "Technical Regulations for Relay Protection and Safety Automatic Devices"
DL/T T596-1996 "Procedures for Preventive Test of Electrical Equipment"
DL408-1991 "Electrical Safety Work Regulations (Electrical Part of Power Plants and Substations)"
DL409-1991 Electrical Safety Work Regulations (Power Line Section)
DL/T 5027-1993 "Typical Fire Fighting Regulations for Electrical Equipment"
DL/T620-1997 "Overvoltage protection and insulation coordination of AC electrical equipment"
Ministry of Power (79) Electric Word 53 "Power Cable Operation Regulations"
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