Method for monitoring secondary pressure plate compulsory locking device and state thereof

Abstract

The invention provides a method for monitoring a secondary pressure plate compulsory locking device and the state thereof, and belongs to the field of apparatuses for monitoring the states of put-into-use and out-of-use of secondary pressure plate of an electric power system. The invention involves the secondary pressure plate compulsory locking device, a scheduling main station server, an anti-error host and a computer key. A pressure plate can be compulsorily locked, and completely broken apart, and the states of put-into-use and out-of-use of the pressure plate are effectively recorded. The secondary pressure plate compulsory locking device can be installed while a secondary pressure plate is under an operating state, and on-line monitoring the states of put-into-use and out-of-use of relay protective pressure plate of all stations at the scheduling main station can be realized through telecommunication.

Description

technical field [0001] The invention provides a forced locking device for a secondary pressing plate and a state monitoring method thereof, and belongs to the field of monitoring devices for switching on and off of a secondary pressing plate in a power system. Background technique [0002] The secondary equipment of the power system is an important part of the safe operation of the power grid. It monitors, measures, operates and controls the primary equipment and plays a protective role. The relay protection device in the secondary equipment is an important guarantee for the safe and stable operation of the primary equipment in the power grid. Among the existing protection devices, the secondary pressure plate is used to switch on and off the function of the protection device and the key to the trip outlet circuit. The pressure plate is correctly put in, Whether to exit or not is directly related to whether the protection device can operate correctly, and the fault can be re...

AI Technical Summary

Problems solved by technology

[0004] However, the monitoring of the operation information of the protection device by the intelligent dispatching technical support system is limited to prompting whether the protection device is in normal operation, and cannot carry out real-time monitoring and effective control of the actual operation status of the secondary pressure plate that can realize the protection function.

In actual work, due to the needs of operation and maintenance personnel to stop, power transmission operation or maintenance personnel to debug the protection device and adjust the operation mode of the primary system, it is necessary to quickly adjust and change the operation status of the secondary pressure plate of the protection device to realize the primary operation equipment under a specific operation mode. Therefore, the existing monitoring of the operating status of the protection device cannot achieve effective monitoring of the protection device

[0005] The monitoring personnel on duty cannot compare the changes in the operation mode of the primary equipment, and promptly remind the personnel on duty of the substation to adjust the switching and stopping of the secondary pressure plate of the on-site relay protection device of each substation, resulting in protection misoperation due to leakage of the secondary pressure plate. , Refusal to operate causes artificial expansion of accidents from time to time, such as: In April 2008, a 220kV substation caused the No. No electricity in the whole station

In June 2012, a single-phase 330kV line of a 330kV substation was grounded instantaneously, and the protection tripped by mistake. The direct outlet tripped three phases due to mis-injection of the communication triple-trip pressure plate, and the 330kV line was blacked out.

In August 2014, a 330kV substation leapfrogged and tripped due to missing switch outlet pressure plate and failure of the pressure plate, resulting in no electricity in the 330kV substation

Since the purpose of indirect locking of the secondary pressure plate is only realized, the real mandatory locking cannot be realized. In this way, for the staff who are not familiar with the working principle of the protection device, after the secondary pressure plate is mismoved, although the pressure plate state sensor shows that the position state is correct, However, the crimping of the pressure plate crimping head is not firm, and the protection device cannot operate normally.

[0007] At the same time, when installing and debugging, it is necessary to install a pressure plate status collector on each protective screen, and to wire each pressure plate, which is troublesome to install and cannot be easily installed under the normal operating state of the protective pressure plate

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