Signal transmission clock synchronization compensation method for four-break series circuit breaker

Abstract

The invention belongs to the field of switching operation synchronous control of four-break intelligent circuit breakers, specifically a signal transmission clock synchronization compensation method for a four-break series circuit breaker. The method comprises the steps: obtaining corresponding normalized forwarding queuing delay and normalized reverse queuing delay according to the timestamps ofeach main clock and each slave clock of a current message; obtaining an instant asymmetric offset of the corresponding clock according to the normalized forwarding queuing delay and normalized reversequeuing delay of the current message; enabling the clock instant asymmetric offsets of the current message to pass through an exponential weighting moving average filter, and obtaining a mean value of the corresponding clock instant asymmetric offsets; obtaining the clock offset of the current message through the mean value of the clock instant asymmetric offsets of the current message; and compensating for the signal transmission time of the four-break series circuit breaker according to the offset of each clock.

Description

technical field [0001] The invention belongs to the field of synchronous control of opening and closing operation of four-break intelligent circuit breakers, in particular, it is applied to a compensation method for signal transmission clock synchronization of four-break series circuit breakers. Background technique [0002] In the high-voltage direct current transmission system, the long-distance transmission link is direct current, and the power generation and power consumption system is still alternating current. With the continuous increase of DC transmission capacity and the denser DC landing points, it is necessary to introduce DC layered access technology, that is, the high-end and low-end converters on the inverter side are respectively connected to AC systems of different voltage levels. The power equipment will also be connected to different voltage levels in layers, and the high-end and low-end converters and corresponding reactive equipment will form a ring netwo...

AI Technical Summary

Problems solved by technology

[0008] Since a lot of work is focused on solving the asymmetry problem of physical links, there are few studies on the problem of queue-induced asymmetry (QIA) in end-to-end transmission.

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