A Synchronization Method for Ring Network Distributed Busbar Protection

A busbar protection and distributed technology, applied in the direction of synchronization device, emergency protection circuit device, digital transmission system, etc., can solve the problems of unable to form mature products, etc., and achieve fast synchronization speed, high timing accuracy and high redundancy Effect

Active Publication Date: 2015-12-30
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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  • A Synchronization Method for Ring Network Distributed Busbar Protection
  • A Synchronization Method for Ring Network Distributed Busbar Protection
  • A Synchronization Method for Ring Network Distributed Busbar Protection

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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 busbar protection synchronization method, which includes three aspects: sampling synchronization of ring network busbar protection, fixed value pressing plate synchronization and time synchronization. For sampling synchronization, a fixed delay plus measurement delay is adopted and the delay correction field of the sampling message is corrected in real time. After the ring network bus protection interval unit obtains the sampling messages of all interval units, software interpolation is performed by analyzing the sampling delay in the delay correction field. Synchronize. The source-side synchronization method is used to realize the synchronization of the fixed value pressure plate, and the fixed value pressure plate can be synchronized at any interval of the ring network busbar protection. The time synchronization method based on the minimum address can ensure that the intervals of the ring network bus protection still have high time synchronization accuracy in the case of the most extreme loss of the external time source. The effect of the invention is that the sampling synchronization method is simple, the synchronization does not need an external synchronization source, and the synchronization precision is high.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J13/00H02H7/22H04L7/00
CPCY04S10/20Y04S40/124Y02E60/00
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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