An intelligent pulse sealing system and method

Abstract

The invention discloses an intelligent pulse cut-off system which comprises a signal detection isolation module, a signal processing module and a pulse control module that are connected successively. The signal detection isolation module is used for detecting an opening signal of a magnetic blow-out switch; the signal processing module receives the opening signal and sends out a pulse cut-off instruction based on a processing logic; and the pulse control module receives the pulse cut-off instruction and carries out pulse cutting off. In addition, the invention also discloses a method of the system. Compared with the prior art, the intelligent pulse cut-off system and method thereof have the following advantages: the reliability of deexcitation of the excitation system is improved; the operation becomes simple and safe; a solution of deexcitation of a jumper is provided for a high-capacity generator set; and a risk of a deexcitation accident of the generator set due to a deexcitation loop fault is reduced to the greatest extent.

Description

technical field [0001] The invention relates to an intelligent pulse sealing system and method, and belongs to the technical field of generator demagnetization. Background technique [0002] When the generator fails, in order to protect the relevant electrical equipment and personal safety, in addition to disconnecting the generator from the grid in time and cutting off the power supply of the excitation system, it is also necessary to quickly consume the energy in the generator rotor. Therefore, it is required that the de-excitation device of the excitation system can quickly and reliably de-excite under the condition of generator failure, so as to quickly reduce the rotor current and reduce the terminal voltage of the generator to zero. [0003] At present, most of the generator demagnetization methods are based on energy transfer, and measures are taken to transfer the rotor energy to the demagnetization resistor for consumption. In this form of demagnetization process, ...

AI Technical Summary

Problems solved by technology

[0007] In the first method, a special auxiliary relay is used to control and block the SCR trigger pulse. The disadvantage is that the action speed of the block pulse depends on the relay, which generally lags by tens of milliseconds, and the average action time is long, and if the relay malfunctions, it will cause power generation. machine demagnetization

In the second method, the function of sealing the pulse is directly controlled by the outlet trip node of the generator protection. The disadvantage is that the relevant circuit of the pulse power supply triggered by the excitation thyristor is led out to the protection cabinet. Generally, the pulse power supply is a DC 24V weak current signal, which leads to the excitation screen Outside the cabinet, the reliability of the pulse circuit operation is reduced, and the trip node of the protection outlet is additionally occupied

At the same time, the common disadvantages of the above two methods are that the control method is simple and the logic is single.

Images