Draught fan control device and control method in power electronic power cabinet

Abstract

The invention provides a draught fan control device and control method in a power electronic power cabinet. The draught fan control device comprises a sensor unit, a draught fan controller and a master controller. The control method is to determine the optimal operation mode through the measurement and the comparison of temperature and wind speed of a heat load case when the draught fan operates in the forward direction and the reverse direction. Compared with the prior art, the control device is simple and efficient in structure, interior structures of the draught fan and the power cabinet are not changed, meanwhile, the heat dissipation efficiency of the draught fan in the flexible power transmission and distribution converter valve power cabinet is improved, and the reliable operation of the power cabinet is guaranteed. The control method is simple and practicable, the rotation speed and the rotation direction of the draught fan are determined according to the heat dissipation condition of the load in the power cabinet, different heat dissipation schemes are provided for different power cabinets, the wide application of the power cabinet is achieved, meanwhile, the effective heat dissipation mode improves the service life and the operation efficiency of the power cabinet, the overheat phenomenon caused by the inverse connection of the circuit of the draught fan is prevented, and the operation reliability of the power cabinet is guaranteed.

Description

technical field [0001] The invention relates to the field of temperature control, in particular to a fan control device and control method in a power electronic power cabinet. Background technique [0002] The forced air convection inside the power cabinet and inside and outside the power cabinet is formed by the fan, which is the main means of cooling the power devices inside the power cabinet today. [0003] After the existing power cabinet design is completed, the internal power device setting position and power consumption are fixed, so the speed and airflow direction of the cooling fan can also be fixed at the initial design, but as the electronic devices After high integration and modularization become a trend, the location, quantity, power consumption, and even type of internal electrical components will be changed accordingly according to the needs, which leads to changes in the heat dissipation structure. Due to the change of heat dissipation structure, there is an...

AI Technical Summary

Problems solved by technology

[0003] After the existing power cabinet design is completed, the internal power device setting position and power consumption are fixed, so the speed and airflow direction of the cooling fan can also be fixed at the initial design, but as the electronic devices After high integration and modularization become a trend, the location, quantity, power consumption, and even type of internal electrical components will be changed accordingly according to the demand, which leads to changes in the heat dissipation structure

Images