Intelligent soft starting device

Abstract

The invention relates to an intelligent soft starting device, which comprises a step-down transformer, an on-load tap-changer, a step-down control cabinet, a reactive power control cabinet, a reactive power generator and a control unit, the high-voltage side of the step-down transformer is connected with a starting cabinet, the neutral point of the high-voltage side of the step-down transformer is provided with the on-load tap-changer, and the on-load tap-changer is connected into a star shape through the step-down control cabinet; the high-voltage end of the reactive generator is connected with the low-voltage side of the step-down transformer through the reactive control cabinet, and the low-voltage ends of the reactive generator are connected into a star shape; a data table is stored in the control unit, the data table comprises key data corresponding to each rotating speed point of the motor, and the control unit is used for collecting data of the motor and data of a power grid, comparing the data with the data table and then outputting a control signal; and the on-load tap-changer is used for adjusting the number of turns of windings at the high-voltage end of the step-down transformer according to the control signal.

Description

Technical field[0001]The present invention relates to the field of motor control, and more particularly to an intelligent soft start device.Background technique[0002]Because all soft starters can be started at a time for empty motors, the starting parameters need to be adjusted several times when the motor is dragged the load unit. Since the primary circuit of the TCS device (buck compensation solid state soft starter) uses a mature buck and reactive generator, all the start-up effects are from TCS when the power is turned to the power grid. Automatic control of the PLC control system within the device. So usually, as long as the accurate grid, motor, load parameters can be provided, the precise selection of the TCS device can be achieved, and a successful start of the site can be guaranteed.[0003]Usually based on the grid parameters, motor parameters, load parameters, the computer simulation is used, and the requirements for starting current (such as no more than 1.5 times the moto...

AI Technical Summary

Problems solved by technology

[0004] The actual situation is that the on-site working conditions are often complex and changeable, and the specific power grid, motor, and load conditions may not be determined, which leads to the situation that the TCS equipment may repeatedly start with load several times in the early stage of commissioning (or in later use) , in order to find the best starting parameter match

[0005] The starting effect of the TCS device is greatly affected by the power grid and load parameters, and is also affected by the on-site installation process

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