Method and system for rapidly collecting and transmitting fault ranging information of power grid line

Abstract

The invention provides a method and a system for rapidly collecting and transmitting fault ranging information of a power grid line. The method includes the following steps: when the power grid line is faulty, a protective trip is started, a fault distance is recorded, and fault ranging information is obtained; the fault ranging information is converted into telecontrol information and the telecontrol information is uploaded to an EMS system; and whether a motion condition of a signal generated when tripping operation occurs due to a failure of the power grid line meets a preset logic criterion is judged, and if the answer is positive, the fault ranging information is extracted from the telecontrol information and transmitted to power grid line operation and maintenance persons in a preset format. By means of the method and the system, the fault ranging information can be rapidly obtained, converted into the telecontrol information, and uploaded to the EMS system. Information obtaining is facilitated for scheduling and monitoring duty persons. Besides, the method and the system can transmit the fault ranging information in the first time (such as in a minute) to the power grid line operation and maintenance persons, the speed is high, and time delay caused by fault finding and power restoration is greatly shortened.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a method for quickly collecting and transmitting transmission network line fault distance measurement information and a transmission network line fault distance measurement information rapid collection and transmission system. Background technique [0002] When the transmission network line is short-circuited or ground fault tripped due to various reasons, the switch is opened and the line load (current or power) becomes zero. At this time, the protection device in the substation will perceive the distance of the fault, that is, the protection device can record the fault distance measurement information. After the power grid dispatching and monitoring duty personnel receive the line switch fault trip alarm in the EMS (energy management system), regardless of whether the switch recloses successfully or not, they need to notify the transmission network line operation and maintenance pe...

AI Technical Summary

Problems solved by technology

[0006] Problems in the first way: (1), slow speed, the whole acquisition process takes more than 1 hour; (2), labor-intensive, need to check at the station

[0007] In addition, there are problems in the second method: (1), the operation is inconvenient, and the information cannot be integrated in the same interface

[0008] To sum up, at this stage, there is a lack of an effective way to send the fault location information on the line protection device to the EMS system, and to transmit the accurate fault location information to the transmission network line operator in the first time. maintenance personnel

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