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Ring network distributed bus protection synchronization method

A busbar protection and distributed technology, which is applied in the direction of synchronization devices, emergency protection circuit devices, digital transmission systems, etc., can solve the problems of inability to form mature products, and achieve the effects of fast synchronization speed, simple implementation method, and high timing accuracy

Active Publication Date: 2014-04-09
NANJING GUODIAN NANZI POWER GRID AUTOMATION CO LTD
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  • Abstract
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Problems solved by technology

Limited to the level of communication technology, mature products cannot be formed

Method used

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  • Ring network distributed bus protection synchronization method
  • Ring network distributed bus protection synchronization method
  • Ring network distributed bus protection synchronization method

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Embodiment Construction

[0023] The present invention is described in detail below in conjunction with the block diagram.

[0024] figure 1 It is a schematic diagram of distributed busbar protection and synchronization in the ring network. As shown in the figure, the distributed busbar protection is composed of equal interval units, and the interval units are connected by two-way ring network with a bandwidth of 1000M. Each bay unit collects the data of this bay and shares it with all other bay units through the ring network, and each bay independently completes the busbar protection function. After the action of each unit, only this interval switch is skipped.

[0025] Since each interval unit is equal, the synchronization method of the present invention includes sampling synchronization, fixed value platen synchronization and time synchronization. Sampling synchronization technology ensures sampling synchronization accuracy, fixed-value platen synchronization ensures the consistency of each inter...

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Abstract

The invention discloses a ring network distributed bus protection synchronization method. The ring network distributed bus protection synchronization method includes the steps of sampling synchronization, constant value pressing plate synchronization and time synchronization. According to the sampling synchronization, fixed delay and measurement delay are adopted; the delay correction domain of sampling messages is corrected real time; and after obtaining sampling messages of all interval units, a ring network bus protection unit performs software interpolation synchronization through analyzing sampling delay in the delay correction domain. According to the constant value pressing plate synchronization, a source-end synchronous method is adopted; and a constant value pressing plate can be synchronized at any intervals of ring network bus protection. According to the time synchronization, a time synchronization method based on minimum addresses is adopted; and each interval of the ring network bus protection can still have very high timing precision under the situation in which an external time source is lost at an extreme end. The ring network distributed bus protection synchronization method of the invention is advantageous in easiness in implementation, no need for external synchronization sources and high synchronization precision.

Description

technical field [0001] The invention relates to a new method applied to a power system relay protection device. In particular, it relates to the synchronization technology of ring network distributed busbar protection, which can solve the requirements of ring network busbar protection for synchronization technology. Background technique [0002] With the development of intelligent substations, distributed busbar protection has become the best solution to meet the application requirements of intelligent substation projects due to its characteristics of being space-oriented, adapting to local release, and simplifying the wiring of secondary circuits. According to the system architecture, distributed busbar protection can be divided into two types: with master station and without master station: the configuration of master station and sub-station, the sub-station only exchanges data with the master station, and the distribution with master station without data interaction betwe...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J13/00H02H7/22H04L7/00
CPCY04S10/20Y02E60/725Y02E60/7838Y04S40/124Y02E60/00
Inventor 叶品勇唐治国陈新之张云徐頔飞陈庆旭
Owner NANJING GUODIAN NANZI POWER GRID AUTOMATION CO LTD
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