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Intelligent substation protection device synchronization performance test system and method based on GPS (globe positioning system) accurate time synchronization technology

A smart substation and relay protection testing technology, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, etc., can solve the problems that a single relay protection tester cannot be completed, and the distance is far away, so as to achieve high accuracy and ensure completeness sexual effect

Inactive Publication Date: 2013-09-11
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the relay protection device with multi-interval sampling, due to the scattered arrangement of each sampling unit and the long distance between each interval, a single relay protection tester cannot complete the test.

Method used

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Embodiment Construction

[0033] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, features and effects of the present invention proposed according to the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. Rear.

[0034] Such as figure 1 As shown, an intelligent substation protection device synchronization performance test system based on GPS accurate time synchronization technology includes several subunits. Each subunit includes a relay protection tester and a corresponding clock expansion unit. The clock expansion unit is connected to the GPS receiving device, which can receive the unified GPS clock signal and realize the start of sending data at a unified time. It is used to simulate the sampling data synchronization index of the intelligent relay protection device under the normal operation of the power grid...

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Abstract

The invention discloses an intelligent substation protection device synchronization performance test system and method based on a GPS (globe positioning system) accurate time synchronization technology. The system comprises a plurality of subunits, each subunit comprises a relay protection test unit and a corresponding clock extension unit, the clock extension unit in each subunit is connected with a GPS receiving device, and the relay protection test units are guaranteed to start sending data at the same moment. The method is mainly used for synchronization performance test of intelligent substation protection devices under the circumstance of conventional transformer sampling, includes two modes that a protection device samples directly from a secondary winding and samples via a merging unit, and is applicable to main substation protection for high-medium-low voltage side sampling, bus protection for cross-interval sampling, differential protection of a line with an intelligent substation on one side and a traditional substation on the other side, differential protection of a line with intelligent substation on both sides and the like.

Description

Technical field [0001] The invention relates to a system and method for testing synchronization performance of intelligent substation protection devices based on GPS accurate time synchronization technology, which is suitable for testing the synchronization of sampling data of intelligent substation optical fiber differential protection and inter-station protection across bays, and belongs to the technical field of power automation. Background technique [0002] Compared with the conventional substation protection, the data collection and transmission of the intelligent substation protection device has undergone major changes. The sampling methods of intelligent protection include: electronic transformer + merging unit + protection device, conventional transformer + merging unit + protection device, conventional transformer + protection device, etc. Among them, the function of the transformer is: to perform the collection of the operating voltage and current of the primary equipm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 宋亮亮袁宇波高磊陈久林卜强生
Owner STATE GRID CORP OF CHINA
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