Merging unit synchronization time hack method adaptive for relay protection application and based on Institute of Electrical and Electronic Engineers (IEEE) 1588

A technology of synchronous time synchronization and relay protection, which is applied in the field of power transmission and transformation, can solve problems such as wrongly set dwell time, application obstruction, etc., and achieve the effect of improving synchronization reliability and meeting reliability requirements

Active Publication Date: 2013-04-10
LIAONING ELECTRIC POWER COMPANY LIMITED POWER SCI RES INSTION +2
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Problems solved by technology

[0005] At present, the application of IEEE1588 is still in the pilot stage in the construction of smart substations. Due to the problem that the switch suddenly and incorrectl

Method used

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  • Merging unit synchronization time hack method adaptive for relay protection application and based on Institute of Electrical and Electronic Engineers (IEEE) 1588

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Embodiment Construction

[0031] The invention is applicable to the secondary equipment manufactured by all intelligent substation secondary equipment suppliers that need reliable time synchronization. Especially when the intelligent substation adopts the relay protection equipment based on network sampling and the IEEE1588 network time synchronization method, the time synchronization method of the present invention can be used by the merging unit to improve the reliability of the relay protection system and avoid the blocking of the entire network relay protection due to abnormal network equipment , resulting in unprotected operation of the substation during the lockout period. The application of the invention in the merging unit of the intelligent substation can greatly improve the reliability level of the sampling technology of the relay protection network, and promote its application in the intelligent substation.

[0032] The merging unit is the process layer equipment of the smart substat...

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Abstract

This invention belongs to the technical field of the power transmission and transformation, and particularly relates to a merging unit synchronization time hack method adaptive for relay protection application and based on an Institute of Electrical and Electronic Engineers (IEEE) 1588 time hack way in a smart substation. A merging unit switches in three time hack states including a step out state, a synchronous follow state and a synchronous punctual state. Based on the hypothesis that a merge unit crystal frequency can not suddenly change, a self clock is compared with a time service clock, if a time difference is beyond a set range, a time hack message is given up, and an accidental big problem that a protection device is caused to be closed and locked in a short time in the actual application process of the IEEE 1588 is solved. According to full test verification, short-time anomalies of all kinds of clock systems are avoided on the basis that the relay protection system reliability is guaranteed, and the merging unit synchronization time hack method adaptive for the relay protection application and based on the IEEE 1588 can be directly applied to a merging unit applied in engineering application.

Description

technical field [0001] The invention belongs to the technical field of power transmission and transformation, and in particular relates to a synchronous time synchronization method for merging units adapted to relay protection applications based on the IEEE1588 time synchronization mode in an intelligent substation. Background technique [0002] The power system is a whole composed of the production, transmission, distribution and consumption of electric energy, and occupies a very important position in the national economy. As the basis and premise of realizing low-carbon electricity, smart grid technology has developed rapidly in many countries in recent years. my country proposes to build a unified and strong smart grid with the UHV grid as the backbone grid, coordinated development of grids at all levels, and featuring informatization, automation, and interaction. As an important link in the power system, the substation is responsible for the tasks of voltage conversion...

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Application Information

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IPC IPC(8): H04J3/06H04L7/00
CPCH04J3/0688H04J3/0667H04J3/14
Inventor 于同伟张武洋张宝善金世鑫卢岩吴兴林王天冯柳
Owner LIAONING ELECTRIC POWER COMPANY LIMITED POWER SCI RES INSTION
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