Description
Overview
Essential details:GFD563A101 3BHE046836R0101 Excitation control unit
The GFD563A101 excitation control unit is the core component of the excitation system, which is used to control and regulate the excitation current, thus controlling the output voltage and reactive power of the generator. Excitation device control unit usually includes excitation controller, excitation regulator and other parts.
Excitation control unit is an important part of synchronous generator, the main functions are as follows:
GFD563A101 3BHE046836R0101 Control parameters such as excitation current and magnetic flux to control characteristics such as generator output voltage and frequency.
When the generator starts to run, supply an appropriate amount of current to the excitation system, so that the output voltage of the generator is stable at the rated value, so as to ensure the normal operation of the generator.
By measuring the comparison unit, the actual terminal voltage of the generator is compared with the automatic set value to control the terminal voltage.
With automatic adjustment function, it can automatically adjust the excitation current output of the power unit according to the running state of the generator to meet the needs of the generator operation.
The integrated amplifier unit amplifies all kinds of DC signals of basic measurement output, feedback, auxiliary limit generation and stable compensation response, and outputs them to the proportional integration link.
The function of the differential adjustment unit is to make the generators running in parallel to distribute the reactive load stably and reasonably.
Stability unit is a unit introduced to improve the stability of power system.
GFD563A101 3BHE046836R0101 The limiting unit is designed to prevent the generator from operating under overexcited or underexcited conditions.
In short, the main function of the excitation device control unit is to control the output voltage and frequency of the generator by controlling the excitation current and magnetic flux and other parameters to ensure the normal operation of the generator.
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GFD563A101 3BHE046836R0101 Excitation control unit
GFD563A101 3BHE046836R0101 The working principle of excitation control unit mainly involves electromagnetic induction and automatic control principle. Excitation device refers to the electric control device which can control and regulate the excitation current except the excitation power supply in the excitation system of synchronous motor. The excitation system controls the excitation current of synchronous generator through the excitation device control unit to realize the regulation of generator output voltage and reactive power. Excitation device control unit is usually composed of measurement and comparison unit, comprehensive amplification unit, adjustment unit, stability unit, limiting unit, etc. Each unit works together to realize the function of excitation device control unit.
GFD563A101 3BHE046836R0101 In the excitation control unit, the measurement and comparison unit is used to compare the actual terminal voltage of the generator with the given value, and the comparison results are fed back to the integrated amplifier unit. The integrated amplifier unit amplifies all kinds of DC signals and outputs them to the proportional integration link in order to control the excitation current. The function of the differential adjustment unit is to make the generators running in parallel to distribute the reactive load stably and reasonably. Stability unit is a unit introduced to improve the stability of power system. The limiting unit is designed to prevent the generator from operating under overexcited or underexcited conditions.
GFD563A101 3BHE046836R0101 The excitation control unit can control the output voltage and frequency of the generator by adjusting the excitation current and magnetic flux. When the generator starts running, the excitation device control unit supplies an appropriate amount of current to the excitation system to stabilize the output voltage of the generator at the rated value. At the same time, the excitation device control unit also has an automatic adjustment function, which can automatically adjust the excitation current according to the running state of the generator to meet the needs of the generator operation.
In short, the working principle of the excitation device control unit is to realize the control of the synchronous generator excitation current through the control function of measurement and comparison, comprehensive amplification, adjustment, stability and limitation, so as to ensure the normal operation of the generator.