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A Time-Delay Curve Fitting Method Based on Time-Scale Off-Limit Data Transmission

A technology of data transmission and curve fitting, applied in time division multiplexing system, electrical components, multiplexing communication, etc., can solve the problem of different message time marks, reduced availability of dispatching end, and consideration of the whole station time synchronization system Insufficient comprehensiveness and other issues to achieve the effect of improving synchronization reliability and ensuring availability

Active Publication Date: 2022-01-28
JINZHOU ELECTRIC POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY +3
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, due to the lack of comprehensive consideration of the time synchronization system of the whole substation at the initial stage of substation construction, there are multiple sets of time synchronization systems in the substation at the same time, and multiple clock sources complete the time synchronization of equipment in the substation. The time synchronization accuracy of different devices in the station is different, and the time mark of the message is also different, which reduces the availability of the data sent by the dispatcher to each substation

Method used

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  • A Time-Delay Curve Fitting Method Based on Time-Scale Off-Limit Data Transmission
  • A Time-Delay Curve Fitting Method Based on Time-Scale Off-Limit Data Transmission
  • A Time-Delay Curve Fitting Method Based on Time-Scale Off-Limit Data Transmission

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Embodiment

[0040] Assume that a certain area contains a power station (Station A) and a 220kV substation (Station B). It is assumed that there is one main transformer in the power station and the substation, and one 220kV outgoing line. In order to ensure the independence of the two stations, each station is equipped with an independent interval switch, and at the same time meets the requirements of the dual redundancy design of the system. The 220kV line interval realizes the 220kV line protection and measurement and control functions through one merging unit and one intelligent unit, and the 220kV bus coupler interval collects the digital quantity and state quantity of this interval and the bus PT interval to realize the 220kV bus coupler protection measurement and control function, and the bus differential protection IED Collect information across intervals to realize 220kV bus differential protection function. The collection of active load and Δt between stations A and B is shown in ...

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Abstract

A time-delay curve fitting method based on data transmission without time-scale violation. The IEEE1588 synchronization protocol determines the dynamic delay. According to the coordinate points of the deviation Δt between the master clock and the slave clock, a scatter distribution is formed, and the distance between the substation and the power plant is According to the distribution of the transmitted active loads, the distribution of the active loads in which the slave clock of the substation is synchronized with the master clock of the power station is calculated, and the synchronization accuracy meets the requirements, and then the active load curve is obtained by curve fitting. The advantages are: to improve the reliability of data synchronization between power plants and substations, to ensure the availability of substation power plants to power station data, and to provide guarantees for the reliable operation of smart grids.

Description

technical field [0001] The invention relates to a time-delay curve fitting method based on non-time-scale off-limit data transmission, in particular to a time-delay curve fitting method based on non-time-scale off-limit data transmission between power plants and substations, and between substations method. Background technique [0002] With the development and wide application of computer technology, cloud computing technology and big data analysis technology, more advanced applications based on power grid big data have put forward higher requirements for the synchronization and synchronization stability of data between power plants and substations, as well as between substations. demanding. [0003] However, due to the lack of comprehensive consideration of the time synchronization system of the whole substation at the initial stage of substation construction, there are multiple sets of time synchronization systems in the substation at the same time, and multiple clock sou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/06
CPCH04J3/0667H04J3/0682H04J3/0644
Inventor 高凯刘云松王强魏凯王顺江邱鹏孟镇赵琰王东来葛维春刘前卫常乃超葛延峰刘金波王永福胡博苏安龙陈晓东周桂平金鹏句荣滨姜河徐慧雯陈海天
Owner JINZHOU ELECTRIC POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY
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