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PLC silicon-controlled static exciting system of synchronous generater

A technology of synchronous generator and static excitation, which is applied in the control system, frequency and voltage control of the generator, control of the generator, etc., and can solve problems such as difficulty in optimal operation, reduced reliability, and complex circuits of analog excitation regulators , to achieve the effect of simple structure, reliable operation and powerful control function

Inactive Publication Date: 2007-02-14
SICHUAN DONGFENG ELECTRIC MACHINARY WORKS CO LTD
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

All the functions of the traditional analog excitation regulator are implemented by hardware, the more functions are required, the more components, solder joints and connectors are used, the more complicated the circuit, the lower the reliability and the difficulty of maintenance
In addition, it is difficult for the analog excitation regulator to flexibly realize the optimal operation

Method used

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  • PLC silicon-controlled static exciting system of synchronous generater

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Embodiment Construction

[0016] Such as figure 1 As shown, a synchronous generator PLC thyristor static excitation system includes a parameter input circuit, a signal conversion conditioning circuit 1, a digital-to-analog conversion circuit 2, a PLC programmable controller 3, a phase-shifting trigger circuit 4, and a rectifier bridge circuit SCR5 , manual control unit 6, switching value input and output circuit 7 and human-machine interface device 8, the parameters of the generator are sent to the signal conversion and conditioning circuit 1 through the parameter input circuit, and the DC voltage signal is formed after rectification and filtering, together with the excitation DC voltage signal The input digital-to-analog conversion circuit 2 is transformed into a digital signal, and the PLC programmable controller 3 reads the digital signal to calculate the control voltage U k , will control the voltage U k The phase-shift trigger circuit 4 generates a control pulse and inputs it to the rectifier bri...

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Abstract

This invention discloses a thyristor static excitation system of a synchronous generator including a parameter input circuit, a signal conversion adjusting circuit, an A / D conversion circuit, a PLC programmable controller, a phase-shift trigger circuit, a rectifying bridge circuit SCR, a manual control unit, a switch volume input and output circuit and a man-machine interface device, in which, excitation current can be adjusted automatically based on the change of loads to guarantee the end current or voltage constant, and the excitation device has the functions of safety demagnetization, quick startup, over excitation limit, event protection, alarm and controlling channel standby manually.

Description

technical field [0001] The invention belongs to a thyristor static excitation device for a synchronous generator, in particular to a synchronous generator thyristor static excitation device with a PLC programmable controller as the core control component. Background technique [0002] With the continuous increase of the single unit capacity of synchronous generators and the continuous increase of long-distance transmission lines, the stability of the power system is becoming more and more important. In order to ensure the reliable operation of the synchronous generator, the requirements for the excitation regulation system are more stringent. For example, it is required to be highly reliable in operation, have excellent technical and economic performance indicators, and be able to complete some special control functions. All the functions of the traditional analog excitation regulator are realized by hardware. The more functions are required, the more components, solder joi...

Claims

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Application Information

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IPC IPC(8): H02P9/00H02P9/14H02P9/44H02H7/06
Inventor 冯安彭加荣邓继建
Owner SICHUAN DONGFENG ELECTRIC MACHINARY WORKS CO LTD
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