Overvoltage protection device for wind power generation medium-voltage converter

Abstract

The invention discloses an overvoltage protection device for a wind power generation medium-voltage converter. The overvoltage protection device comprises a cross rod, a lightning protection box is installed on the surface of the top of the cross rod, a bearing disc is installed on the surface of the cross rod in a surrounding mode, folding fan blades are installed on the surface of the bearing disc in a surrounding mode, a wind power induction box is installed on the front faces of the folding fan blades, a supporting column is welded to the bottom of the transverse rod, the bottom of the surface of the supporting column is sleeved with a fixing ring, a bottom plate is fixed to the bottom of the fixing ring through bolts, a base plate is installed on the surface of the top of the bottom plate, a monitoring box is installed on the top of the base plate, a heat dissipation disc is installed on the inner wall of the supporting column, and a voltage stabilizer is mounted at the top of the heat dissipation disc. According to the device, the wind power induction box is arranged, the impact strength of hitting the soft ball is detected through the pressure sensor, the wind power of the device in a wind power environment is judged in an auxiliary mode, and whether the device needs to be subjected to overpressure protection or not can be accurately detected.

Description

technical field [0001] The invention relates to the technical field of overvoltage protection, in particular to an overvoltage protection device for a wind power generation medium-voltage converter. Background technique [0002] In coastal areas, wind resources are relatively abundant, and the wind blown by the sea surface can be used for wind power generation, so as to reduce the arm power of thermal power generation in my country's power generation system and reduce energy consumption. In wind power generation, an overvoltage protection is usually required The device is used for overvoltage protection of the medium-voltage converter used in the process of wind power generation, so as to avoid excessive input voltage, which will cause excessive internal working current of the device, causing damage such as current breakdown, and in addition, excessive wind force will cause wind power generation The fan blade in the device rotates too fast, which may also cause a large inducti...

AI Technical Summary

Problems solved by technology

The overvoltage protection device and overvoltage protection circuit provided by this application can prevent the occurrence of a fire in the short circuit of the transient suppression diode assembly. The device uses temperature changes as the basis for the activation of the overvoltage protection function, but the device is installed in a ventilated environment. In a better use environment, the heat dissipation is better, and the validity of the temperature as a basis is reduced, so the effectiveness of the start-up basis for the overvoltage protection of the device is insufficient;

[0006] 3. The comparative document CN206130224U discloses a high-temperature, high-pressure, strong corrosion-resistant overvoltage protector, "including a sealing cover, an overvoltage protector body, a valve core assembly, and a spring assembly, and the valve core assembly is arranged in the cylinder of the overvoltage protector , the spool assembly and the spring assembly constitute a force balance system; this technical solution is applicable to all production process control devices with pressure sources or on-site pressure overpressure protection, after setting and adjusting the process pressure value mechanism (spring assembly), it can Effectively realize the overpressure protection of adjusting the pressure value, quickly cut off the pressure source of overpressure, so as to realize the safety protection of the process control device or the site, and receive the double benefits of safe production and protection device, but the device is performing overpressure protection In case of thunderstorms, it is not considered that the device needs to be protected from lightning and power generation should be stopped to reduce the possibility of the device being damaged by lightning.

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