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Multi-mode redundant field suppression protection loop

A multi-mode redundancy and protection circuit technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problem of low reliability of demagnetization, and achieve the effect of prolonging service life and improving reliability.

Active Publication Date: 2013-05-29
DONGFANG ELECTRIC MACHINERY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a multi-mode redundant de-excitation protection circuit based on multi-mode redundant thyristor jumpers connected to energy-consuming elements for the defect of low reliability of de-excitation in the prior art

Method used

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  • Multi-mode redundant field suppression protection loop

Examples

Experimental program
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Effect test

Embodiment 1

[0026]Multi-mode redundant de-excitation protection circuit, including thyristor jumper and its control trigger, the first thyristor jumper V1, the second thyristor jumper V2, the third thyristor jumper V3 is three independent thyristor jumpers with the same technical parameters. They are all high-power thyristors with high blocking voltage. The rated current is 3500A, and the forward and reverse blocking voltages are 5200V. The negative terminals of the first thyristor jumper V1, the second thyristor jumper V2, and the third thyristor jumper V3 are connected in parallel with each other and then connected to the positive pole of the generator field winding L, and the positive terminals are connected to each other After parallel connection, it is connected to one end of the SiC non-linear resistance, and the other end of the SiC non-linear resistance is connected to the negative pole of the generator field winding L. The first thyristor jumper V1, the second thyristor jumper V2,...

Embodiment 2

[0029] Multi-mode redundant de-excitation protection circuit, including thyristor jumper and its control trigger, the first thyristor jumper V1, the second thyristor jumper V2, the third thyristor jumper V3 is three independent thyristor jumpers with the same technical parameters. They are all high-power thyristors with high blocking voltage. The rated current is 3500A, and the forward and reverse blocking voltages are 5200V. The negative terminals of the first thyristor jumper V1, the second thyristor jumper V2, and the third thyristor jumper V3 are connected in parallel with each other and then connected to the positive pole of the generator field winding L, and the positive terminals are connected to each other After parallel connection, it is connected to one end of the linear resistor, and the other end of the linear resistor is connected to the negative pole of the generator field winding L. The first thyristor jumper V1, the second thyristor jumper V2, and the third thyr...

Embodiment 3

[0032] Multi-mode redundant de-excitation protection circuit, including thyristor jumper and its control trigger, the first thyristor jumper V1, the second thyristor jumper V2, the third thyristor jumper V3 is three independent thyristor jumpers with the same technical parameters. They are all high-power thyristors with high blocking voltage. The rated current is 3500A, and the forward and reverse blocking voltages are 5200V. The negative terminals of the first thyristor jumper V1, the second thyristor jumper V2, and the third thyristor jumper V3 are connected in parallel with each other and then connected to the positive pole of the generator field winding L, and the positive terminals are connected to each other After parallel connection, it is connected to one end of the ZnO non-linear resistance, and the other end of the ZnO non-linear resistance is connected to the negative pole of the generator field winding L. The first thyristor jumper V1, the second thyristor jumper V2...

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Abstract

The invention discloses a multi-mode redundant field suppression protection loop which comprises silicon controlled rectifier (SCR) jumpers, control triggers of the SCR jumpers, a magnetic field circuit breaker and a generator magnetic field winding. The multi-mode redundant field suppression protection loop is characterized in that the SCR jumpers are high-power SCRs with high blocking voltage; after at least three SCR jumpers are connected in parallel, the cathode ends of the SCR jumpers are connected with the anode of the generator magnetic field winding, and the anode ends are connected with one end of a dissipative element, while the other end of the dissipative element is connected with the cathode of the generator magnetic field winding; and the SCR jumpers are respectively connected with one control trigger. In the invention, the multi-mode redundant SCR jumpers are connected with the dissipative element, thereby greatly improving the reliability of the field suppression of the dissipative element under an accident condition.

Description

technical field [0001] The invention relates to the field of motor excitation control, and mainly relates to a multi-mode redundant de-excitation protection circuit in an excitation device. Background technique [0002] The excitation device is a combination that provides an adjustable excitation current device to the generator rotor field winding. The excitation device is generally composed of an excitation adjustment cabinet, an excitation rectifier cabinet, a de-excitation and an overvoltage 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. When accidents such as short circuit and grounding occur inside the generator or in the power system, the excitation device should be able to quickly cut off the excitation current and quickly consume the magnetic field energy stored in the fiel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/06
Inventor 李宇俊
Owner DONGFANG ELECTRIC MACHINERY
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