Method for monitoring light trigger pulse of power electronic device

Abstract

The invention discloses a method for monitoring light triggered pulse of a power electronic device. The device comprises a pulse monitoring module, a frequency measuring module, a cycle judging module, a pulse information conditioning module, a pulse comparing module and a human-computer interface; and the method comprises the following steps: the pulse monitoring module monitors the advent of pulse in real time and transmits information to the frequency measuring module; through judging the width of the pulse and the number of the pulse in a cycle, the frequency measuring module transmits information to the cycle judging module; the cycle judging module transmits the information to the pulse information conditioning module; through sorting, the pulse information conditioning module transmits the information to the pulse comparing module; and the pulse information is compared. The pulse monitoring method is based on a programmable logic device, can monitor an optical signal of a monitoring control unit, identify the length of a pulse cycle, the pulse width, the number of the pulse in the cycle and the like, set the theoretical situation of the input pulse through the human-computer interface and compare the monitored pulse with the standard pulse; and if the pulse is abnormal, the human-computer interface alarms in time and makes corresponding processing.

Description

technical field [0001] The invention belongs to the field of electrical monitoring, and relates to a pulse monitoring method, in particular to a monitoring method for light-triggered pulses of power electronic devices. Background technique [0002] With the rapid development of power electronics technology, the use of pulse monitoring in power systems is becoming more and more extensive. Such technologies are widely used in the field of flexible power transmission, and will also be widely used in optical fiber transmission in digital substations in the future. [0003] The power frequency pulse of the power system is a standard 50Hz pulse, and the trigger pulse is a periodic signal. There are single pulse and multiple pulses in one cycle. The trigger pulse must conform to a fixed format and strict time regulation. Therefore, it is necessary to monitor whether the pulse meets certain requirements, and if not, the corresponding conversion output will not be performed, and an...

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Problems solved by technology

[0004] At present, most pulse monitoring methods are level monitoring, that is, monitoring whether the pulse level changes, not whether there is a jump edge in the pulse, such a monitoring method is slow, and it is difficult to monitor high-frequency power electronic modulation pulses. fulfil requirements

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