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

A signal transmission and clock synchronization technology, applied in reactive power compensation, power transmission AC network, reactive power adjustment/elimination/compensation, etc., to achieve the effect of correcting asymmetry and solving clock synchronization problems

Inactive Publication Date: 2018-08-17
WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST +2
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  • Abstract
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  • Claims
  • Application Information

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.

Method used

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

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Embodiment Construction

[0025] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0026] Such as Figure 4 As shown, the compensation method applied to the signal transmission clock synchronization of the four-break series circuit breaker is characterized in that it includes the following steps:

[0027] 101. Obtain the corresponding normalized forward queuing delay and normalized reverse queuing delay according to the time stamp on each master clock and the time stamp on the slave clock of the current message;

[0028] 102. According to the normalized forward queuing delay and the normalized reverse queuing delay of the current message, the instantaneous asymmetric offset of the corresponding clock is obtained;

[0029] 103. Pass the clock instantaneous asymmetric offset of the current message thro...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36H02J3/18H02H7/26
CPCH02H7/268H02J3/18H02J3/36H02J2003/365Y02E40/30Y02E60/60
Inventor 张杰程林江翼苏丹廖敏夫段雄英刘志恒
Owner WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST
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