Excitation control system for giant machine set

Abstract

The invention discloses an excitation control system for a giant machine set, which comprises an excitation regulator cabinet, an excitation rectifier cabinet and deexcitation protection cabinet. The excitation control system is characterized in that: the excitation regulator cabinet comprises a human-computer interface, a first main controller, a second main controller, and a first industrial Ethernet switch and a second industrial Ethernet switch which form dual redundancy; the excitation rectifier cabinet comprises a thyristor rectification bridge, a cooling device, a peak absorbing deviceand a rectifier cabinet controller, wherein the rectifier cabinet controller transmits a pulse signal used for homogenizing current to control the thyristor rectification bridge and transmits a control signal to control the startup and stop of the cooling device, and the peak absorbing device absorbs commutating voltage of the thyristor rectification bridge; and the deexcitation protection cabinet comprises a deexcitation switch, a deexcitation resistor, a jumper and a jumper controller. The excitation control system for the giant machine set has the characteristics of high reliability, high transmission speed and high long-term stability.

Description

technical field [0001] The invention relates to the field of motor excitation control, and mainly relates to an excitation control system of a giant unit. Background technique [0002] The excitation device is a combination of adjustable excitation current devices for the generator rotor field winding. The excitation device is generally composed of an excitation regulator cabinet, an excitation rectifier cabinet, and an excitation protection cabinet. Its main function is to provide a quantitative excitation current that meets the needs of the generator and the power system, and at the same time, the current can be reliably adjusted and controlled according to the needs. [0003] In the communication of the excitation device, the data exchange between the excitation regulator in the excitation device and the man-machine interface usually adopts RS232 serial communication, only one driver and one receiver are allowed on the transmission line, and the working mode is single-end...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the existing technology cannot make the data communication in the excitation device take into account both high speed and reliability. In the current sharing of the excitation rectifier cabinets running in parallel with the excitation devices, the current sharing effect cannot be guaranteed for a long time, and it is easy to cause temperature drift, poor long-term stability and The de-excitation method of thyristor jumper connected to energy-consuming components has the disadvantage of low reliability of de-excitation, and provides a giant unit excitation control system with high reliability, fast transmission speed and good long-term stability

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