What measures should the wind farm take before the windy weather comes?

Lightning protection is a very complicated problem. According to the invasion route of lightning damage, all kinds of factors that may cause lightning strike should be eliminated, and comprehensive prevention and control-lightning arrester, voltage equalizer, shielding, grounding and shunt (protection) should be taken to minimize lightning damage. (1) lightning protection connection device. It is the lightning rod, lightning belt, lightning wire or lightning protection network that we often say. Lightning connection is to discharge the lightning in a certain range, and the discharge channel cannot be selected arbitrarily, but only the lightning energy can be discharged into the earth according to the designated channel of the lightning protection system designed by people in advance. (2) Equipotential bonding. In order to completely eliminate the destructive potential difference caused by lightning, it is especially necessary to implement equipotential bonding. Power line, signal line, metal tube, etc. Equipotential connection should be made through overvoltage protector, and the interface of each inner protection zone should be partially equipotential connected accordingly, and finally connected to the equipotential connection bus. (3) shielding. Shielding is to surround the protected object with conductors such as metal mesh, foil, shell or tube, so that all the channels invaded by lightning electromagnetic pulse waves are cut off. All shields, shells, etc. Need grounding. (4) Grounding. Grounding means that the lightning current that has entered the lightning protection system can flow into the earth smoothly, and the lightning energy cannot be concentrated in a certain part of the lightning protection system to damage the protected object. Only good grounding can effectively release lightning energy, reduce the voltage on the down conductor and avoid counterattack. (5) shunt. Shunt is to connect a suitable lightning arrester in parallel between all the wires led out from the outdoor and the lightning protection grounding device or grounding wire. When the overvoltage wave generated by direct lightning or lightning strike on the line enters the room or equipment along these wires, the resistance of the lightning arrester suddenly drops to a low value, which is close to the short circuit state, and the lightning current will flow into the ground. (6) Ionization lightning protection device. Ionization lightning protection device is a lightning protection measure for chemical production devices and storage tanks by using Lei Yun induction or taking special measures. The strong thermal and mechanical effects caused by lightning strike will cause great damage to the flammable and explosive materials stored in chemical production devices and tank farms, and it is easy to cause the combustion and explosion of flammable and explosive materials. All equipment and pipelines on the production site should be grounded. The entrance and exit of metal pipes, the parallelism or crossing of pipes, and the joint of pipes shall be bridged by wires and properly grounded. The metal roof in the chemical production plant should be connected to the ground wire with down conductor along the circumference at15m. For the reinforced concrete roof, the steel frame should be welded into a whole during construction, and connected with the grounding wire with down lead every 15 meters. In order to prevent "lightning strike back", the flashover voltage of insulation medium between lightning protection device and building metal conductor should be greater than the counterattack voltage. When the distance between parallel pipelines conveying flammable liquids is less than 10 cm, the pipelines should be connected with wires every 20 meters along the pipeline length. For chemical plants and their buildings, all the power supply lines used are introduced by buried cables. Or 50 ~ 100 meters before entering the building, the wires are buried into cables to introduce power. Valve arrester should be installed at the connection between cable and overhead line. The arrester, cable metal sheath and insulator iron foot should be grounded together, and the grounding resistance is generally 5 ~ 30 ohms. 2. Lightning protection of open-air storage tanks. Gas storage tanks and flammable liquid storage tanks in chemical enterprises are mostly made of metal, and some tall storage tanks are vulnerable to lightning in thunderstorm season, so independent lightning rods should be used for protection. When the wall thickness of the above-ground horizontal oil tank with flame arresters is equal to or greater than 4 mm, lightning rods should not be installed. Aluminum roof oil tanks and steel oil tanks with a roof thickness of less than 4 mm should be equipped with lightning rods (nets), and the lightning rods (nets) should protect the whole oil tank. The floating roof oil tank or the inner floating roof oil tank should not be equipped with lightning rod, but the floating roof should be connected with the oil tank with two wires. Human lightning protection measures (1) Stay outdoors or outdoors as little as possible during lightning activities. If conditions permit, you can enter buildings with wide metal frames or lightning protection facilities, and try to stay away from hills, hills or raised paths, beaches, lakes, rivers and pools, barbed wire, metal clotheslines, flagpoles, chimneys, towers and solitary trees, as well as small buildings or other facilities without lightning protection. (2) Pay attention to the danger of indoor lightning intrusion wave. Keep away from lighting lines, power lines, telephone lines, broadcast lines, radio power lines, radio and television antennas and various devices connected with them to prevent these lines or devices from discharging to human body. Also pay attention to close the doors and windows to prevent ball lightning from entering the room and causing injury. (3) Step voltage protection. When lightning passes through the grounding body at the lightning strike point on the ground and flows into the surrounding soil, it will form a high potential around it. If someone stands near the grounding body, it will be harmed by the step voltage generated by lightning current. In order to prevent people from being injured by stepping voltage, the distance between the grounding device against direct lightning and the entrances and exits of buildings and structures and sidewalks should not be less than 3m. When it is less than 3 meters, safety measures such as partial burying, isolation with asphalt insulation layer and underground layered laying should be taken.