There are many types of wind turbines. From the point of view of structure, they can be divided into those with reducers and without reducers. From the perspective of blade angle, they can be divided into fixed pitch and variable pitch types. change method, they can be divided into hydraulic variable pitch propellers. There are no fewer than four or five types of electric propellers and pitches. Do we have to design them?
If the mechanism is different, the hub size will be very different. There are several lightning protection systems for wind turbines. The weather mount on top of the machine gun is equipped with lightning rods. are connected to the ground grid by wires. There are metal blocks at the ends of the blades, leading to a ground grid from inside the blade, a lightning protection carbon brush between the wheel hub and the nacelle, and between the nacelle and the nacelle . turn, which reducescontact resistance and improves conductive efficiency. The tower and the tower connection flange are also connected via a flexible wire. There are also lightning protection modules, surge protectors, etc. in the electrical circuit, which can protect and cause lightning. There are many books on this topic, most of them are published by China Electric Power Publishing House. There is a specialty store in Beijing. If I have the CAD drawings, I won't tell you.
The inspection qualification standards are:
Wind turbine acceptance specifications GB/T 20319-2006
JB/T wind turbine design requirements 10300-2001
p>Safety requirements for wind turbines GB 18451.1-2001
Specifications for the assembly and installation of wind turbines GB/T 19568-2004
Wind turbines Part 1: General technology Conditions GB/T 19960.1-2005
Wind turbines Part 2: General test methods GB/T 19960.2-2005
etc.~~
(1) Civil construction part:
1. The foundation of the box transformer is complete and there are no cracks;
2. The box transformer trench is clean and there are no cracks; accumulation of water, the ventilation holes are smooth and the metal parts are free of .
3. Rusty and well grounded.
(2) Cabinet part:
1. Check whether the box shell is corroded, deformed or has large gaps;
2. Check for leaks, water leaks or freezing in the box transformer;
3. The exterior of the boxed transformer must be kept clean and free of stickers, and the boxed transformer door locks must be intact and configured correctly.
4. The transformer housing is grounded and the nameplate is intact.
(3) High voltage part:
1. The name and number of the disconnector are not endommaged.
2. The disconnector position indication is correct.
3. The sulfur hexafluoride switching gas is within the permitted range.
4. The joints of the elbow cables are in close contact and intact.
5. The surge protector is clean, intact and shows no discharge phenomenon.
6. The live indicator and short circuit fault indicator indicate correctly.
7. The high pressure chamber door is securely closed.
8． Holes for incoming and outgoing high voltage cables are well sealed.
(4) Transformer part:
1. Key points for inspecting dry-type transformers: Check the bottom and ends of insulators and windings for dust accumulation. If so, compressed air with a maximum pressure of 2 atmospheres should be used to blow away dust from ducts and ventilation surfaces. It's forbiddentouch during operation inspection. During observation, you should pay attention to whether the fastening parts are loose and hot, whether there are cracks, creepage lines and carbonization marks on the insulation surface of the winding and whether the sound is normal.