Valve base electronic device of direct current converter valve

Abstract

The invention provides a valve base electronic device of a direct current converter valve, the inner part of the device comprises a 6U power supply case, a 3U power supply case and a light-operated case, wherein, the power supply cases are used for providing working electric energy for the whole VBE device. The light-operated case is a unit which realizes VBE core data processing function. The number of the light-operated case can be changed according to the scale of a thyristor valve, and at most 12 cases can be configured. The logical processing capability to the junction temperature of a thyristor is added to the novel valve base electronic device, the asynchronous serial coding technology is adopted to achieve the communication between the VBE and GU, meanwhile, a relay component is added into each light-operated case, therefore, a trigger command and the junction temperature of the thyristor can be transmitted between all light-operated cases by a chained structure, thereby having very good effect.

Description

technical field [0001] The invention relates to the field of power electronic direct current transmission of electric power systems, in particular to a valve base electronic device for a direct current converter valve. Background technique [0002] Valve-based electronic equipment (VBE) is the interface device between the control protection system and the converter valve, and is mainly used to complete the triggering, monitoring and protection of the valve. Whenever the control and protection system issues a valve trigger command, the VBE triggers the converter valve according to the command. [0003] In the traditional design, the trigger command of each valve is transmitted to the VBE through an optical fiber, therefore, 12 valves at least [0004] 12 optical fibers are required to complete the transmission of the trigger command. To verify whether the command received by the VBE is correct, another 12 fibers are required. [0005] The root optical fiber sends the verifi...

AI Technical Summary

Problems solved by technology

This method has poor anti-interference ability, and the information that can be expressed is very limited

[0007] The ability of the thyristor to withstand the voltage is greatly affected by the junction temperature. However, in the traditional design, the threshold value of the protection trigger is a fixed value

This design undoubtedly reduces the rationality of the protection; in some cases, the junction temperature of the thyristor is high, and the actual voltage withstand capability is very low, but because the voltage of the thyristor has not yet reached the threshold value, the protection trigger refuses to operate, and the thyristor may be struck. In other cases, the junction temperature of the thyristor is low and the actual voltage withstand capability is relatively high. Since the voltage of the thyristor has reached the threshold value of the protection trigger, the protection trigger action may eventually lead to the shutdown of the whole DC transmission system

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