Consider the quality and working condition of the blades to avoid damage. The specifications of commonly used blade lightning protection cables are 20-14# copper wires, generally with an outer diameter of 6mm and a length of 2-3m. Both ends are connected to both ends of the blade and the other end is connected to neutral. grounded safety system line or loop. In addition, the cable can also be equipped with a lightning arrester to protect the blades to ensure the safe operation of the blades.
How to measure wind power lightning protection grounding
There are many models of wind turbines. They can be divided into those with reducers and those without reducers from the point of view of structure and angle. blades, they can be divided into fixed pitch and variable pitch into hydraulic pitch and electric pitch according to the metstep pattern. In total there are no less than four or five types. Do you want 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 reduces contact 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 subjectt, 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
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This question is not sufficient The accuracy mainly depends on the part you are measuring. The foundation of a wind turbine is the same as other basic measurements. Measuring the common ground grid of wind power requires certain measurement methods due to its large area. For this, you canz refer to GBT
17949.1-2000 “Soil resistance”. of the earthing system » Guidelines for measuring power, earth impedance and earth potential
Part 1
Conventional measurements" and DL∕T< /p>
475-2006
Guidelines for measuring characteristic parameters of grounding devices