SV sampling out-of-step monitoring method for intelligent substation based on SV message

A technology for smart substations and messages, applied in the field of smart substations, can solve the problems affecting the safe and reliable operation of the power system, data out-of-sync, etc., and achieve the effect of avoiding protection malfunction or refusal to operate

Inactive Publication Date: 2017-07-04
STATE GRID ZHEJIANG ELECTRIC POWER CO LTD SHAOXING POWER SUPPLY CO +3
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Problems solved by technology

[0007] The purpose of the present invention is to provide a smart substation SV sampling out-of-synchronization monitoring method based on SV messages to solve the problem that the out-of-synchronization of sampling data at different intervals affects the safe and reliable operation of the power system

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  • SV sampling out-of-step monitoring method for intelligent substation based on SV message

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Embodiment Construction

[0018] like figure 1 Shown is the flow chart of the present invention based on the intelligent substation SV sampling out-of-synchronization monitoring method of SV message, as can be seen from the figure, the steps of the method are as follows:

[0019] (1) Read the relevant configuration information of the device. The relevant configuration information here includes relevant configurable information such as sampling out-of-synchronization monitoring criteria, input and withdrawal control words;

[0020] (2) Read the SV sampling data to determine whether the SV is synchronous, and calculate once per frame. When the sampling flag is false, it is judged as out-of-synchronization. The SV link does not implement the sampling out-of-synchronization monitoring criterion, otherwise, the sampling out-of-synchronization monitoring is performed;

[0021] (3) If the sampling out-of-synchronization monitoring criterion is enabled, when performing sampling out-of-synchronization monitorin...

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Abstract

The invention discloses an SV sampling out-of-step monitoring method for an intelligent substation based on an SV message. The method comprises the following steps: (1) reading the related configuration information of a device; (2) reading the sampled data, judging synchronization markers, and determining once for each frame; when the sampled synchronization marker is identified as false, determining the result as out of synchronization, and ensuring that an SV link does not perform sampling out-of-step monitoring criteria, and otherwise, ensuring that the SV link performs sampling out-of-step monitoring; and (3) during sampling out-of-step monitoring, comparing the time scales of sampling points with the sampling sequence number of N for each group of SV links within the same second. According to the SV sampling out-of-step monitoring method for the intelligent substation based on the SV message disclosed by the invention, the SV sampling out-of-step state in the intelligent substation can be real-timely diagnosed and alarmed, thereby, the operation and maintenance personnel of the intelligent substation can timely discover the sampling anomalies and take necessary measures to reduce or even avoid the serious consequences cause by the occurrence of protection misoperation or operation refusal.

Description

technical field [0001] The invention belongs to the technical field of intelligent substations, and in particular relates to a method for monitoring out-of-synchronization of SV sampling in intelligent substations based on SV messages. Background technique [0002] Since 2010, smart substations of various voltage levels have been put into operation one after another. With the deepening of the construction of intelligent substations, more old substations have undergone intelligent transformation, and digital sampling has been realized on the spot through conventional transformers. Through the merging unit, the multi-channel digital acquisitions are time-synchronized and combined and output for use by other devices. [0003] At this stage, the main clock of smart substation generally adopts Beidou navigation system and global positioning system (GPS) as the clock source at the same time, and adopts the redundant working mode of the main and standby clocks. Nevertheless, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06H02J3/00
CPCH04J3/0635H02J3/00H04J3/0638
Inventor 蒋正威常乃超章立宗杜奇伟屈刚肖艳炜刘永新陆承宇洪道鉴许伟国吴栋萁阮黎翔吴新华江波陈晓雷钱海东郑翔窦中山张秀娟
Owner STATE GRID ZHEJIANG ELECTRIC POWER CO LTD SHAOXING POWER SUPPLY CO
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