PLC silicon-controlled static exciting control system

A technology of static excitation and control system, applied in the control system, controlling the generator through magnetic field changes, controlling the generator, etc., can solve the problems of high cost and poor real-time performance, and achieve a simple structure, improved reliability, and rich control instructions. Effect

Inactive Publication Date: 2007-02-14
SICHUAN DONGFENG ELECTRIC MACHINARY WORKS CO LTD
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Problems solved by technology

The excitation system generally consists of two parts, one part is used to provide DC current to the field winding of the generator to establish a DC magnetic field, usually called the excitation power output part (or excitation power unit), and the other part is used to To adjust the excitation current in case of failure to meet the needs of safe operation, it is usually called the excitation control part (or excitation control unit or excitation adjustment device), but most of the excitation adjustment devices of the existing static excitation system use a microcomputer as the control core, and the cost is high , poor real-time performance

Method used

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  • PLC silicon-controlled static exciting control system
  • PLC silicon-controlled static exciting control system
  • PLC silicon-controlled static exciting control system

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Embodiment Construction

[0022] The technical solutions of the present invention are further described below with reference to the accompanying drawings. like figure 1 , PLC thyristor static excitation control system, including excitation transformer, excitation adjustment device, power rectifier, generator de-excitation and overvoltage protection device, excitation device.

[0023] like figure 2 The excitation adjustment device is a programmable controller, which includes a central processing unit CPU, a read-only storage area, a read-write storage area, four analog input modules, one analog output module, and fourteen switch input modules. , Eleven switch output modules and RS-232 interface modules.

[0024] like image 3 , the control and adjustment steps of the excitation adjustment device include system initialization, control adjustment, monitoring and protection.

[0025] like Figure 4 , the system initialization steps include system parameter initialization, peripheral initialization, m...

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Abstract

This invention discloses a static excitation control system of PLC thyristors including an excitation transformer, an excitation adjusting device, a power rectifying device, demagnetization and over-voltage protection device and an excitation startup device, in which, said excitation adjusting device is a programmable controller, the excitation adjusting device includes system initialization, regulation control, monitor and protection.

Description

technical field [0001] The invention relates to a generator excitation device, in particular to a PLC thyristor static excitation control system. Background technique [0002] In today's power system, improving and maintaining the stability of synchronous generator operation is one of the basic conditions to ensure the safe, stable and economical operation of the power system. The excitation system is an important part of the synchronous generator set. In order to realize the conversion of energy, the synchronous generator needs a DC magnetic field, and the DC current that generates this magnetic field is called the excitation current of the generator. According to the supply method of excitation current, any generator that obtains excitation current from other power sources is called a separately excited generator, and if it obtains excitation power from the generator itself, it is called a self-excited generator. The excitation system directly affects the operating charac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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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