Magnetically-controlled reactor control system

Abstract

The invention relates to a magnetically-controlled reactor control system which comprises a low-voltage part and a high-voltage part, wherein the low-voltage part comprises an upper industrial computer, an LCD touch screen, a main controller, a wireless communication master station and a relay protection device, and is used for detecting voltage and current signals, completing the control function via a control target and sending firing angle data to the high-voltage part in a wireless communication manner; and the high-voltage part comprises an excitation controller A, an excitation controller B and an excitation controller C, and is used for receiving the firing angle instruction sent out by the low-voltage part in a wireless communication manner, and uploading the fault information and control winding voltage to the main controller of the low-voltage part. The magnetically-controlled reactor control system is safe and reliable in insulation of high-voltage part and low-voltage part, is easy to implement, and reduces equipment cost and field construction workload; through synchronous signals provided by the control winding, control accuracy and stability are improved; and under the situation that a hardware platform is basically unchanged, requirements of various application occasions can be met through only selecting and assembling a small quantity of hardware and software modules.

Description

technical field [0001] The invention relates to a control system, in particular to a control system for a magnetically controlled reactor. Background technique [0002] With the rapid development of the power industry, the requirements for power supply capacity, voltage level, power supply quality and reliability are getting higher and higher. How to improve power quality, effectively reduce the pollution of reactive power to the power grid, and ensure the safe operation of the power grid has become an important issue in the electrical field. topic. The magnetron reactor is composed of the main winding and the control winding. The control winding provides the main winding with a certain size of controllable DC bias current through the thyristor. The DC magnetic flux generated by the DC bias current saturates the working iron core column, thereby making the magnetron Reactor capacity increases. Adjusting the size of the thyristor trigger control angle α can change the magne...

AI Technical Summary

Problems solved by technology

However, if the magnetron reactor is star-connected or operated as a soft starter, due to the drift of the midpoint potential and the change of the motor voltage and current, there will be a difference between the grid voltage phase and the voltage phase of the magnetron reactor control winding. At this time, if the grid voltage is still used as the synchronous voltage, it will cause errors, and even cause system oscillation and cannot run stably.

This requires an additional arrangement of the voltage PT to measure the phase voltage of the magnetron reactor as a thyristor trigger synchronization signal, otherwise the phase error of the sync signal and the magnetron reactor control winding will affect the control performance

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