Equipment for monitoring switching-off and on time of high-voltage circuit breaker on line

Abstract

The invention relates to equipment for monitoring the switching-off and on time of a high-voltage circuit breaker on line, comprising monitoring devices, a main control panel, a communication front-end machine and an upper computer. The equipment is characterized in that the monitoring device I is provided with the main control panel, a high-speed data processing unit, a DSP2812 and a logic-signal processing unit which is a CPLD (complex programmable logic device), the output interface of the main control panel is connected with a host computer, a waveform output, a network communication interface and a watchdog, the current measuring port and the stroke measuring port of the monitoring device I are connected with a circuit breaker I, the current measuring port and the stroke measuring port of the monitoring device II are connected with a circuit breaker II, and the monitoring device I and the monitoring device II are connected with the communication front-end machine and the upper computer through CAN buses. A photoelectric current sensor is adopted to monitor various current signals in real time, the current signals are transferred to a digital processing unit module through optical fiber communication under the protocol IEC61850, the internal object-oriented language C++ is adopted to programme, and the switching-off and on time of the high-voltage circuit breaker is monitored on line so that the fault of the circuit breaker can be diagnosed.

Description

Technical field: [0001] The invention relates to an on-line monitoring device for a high-voltage circuit breaker in a substation, in particular to an on-line monitoring device for breaking, closing time and fault diagnosis of the high-voltage circuit breaker under the IEC61850 communication protocol of the International Electrotechnical Commission. Background technique: [0002] Among substation equipment, high-voltage circuit breakers have the largest number and a huge maintenance workload. The current state-of-the-art maintenance mode for high-voltage circuit breakers has basically completely replaced the traditional planned maintenance mode. In order to improve the pertinence of maintenance, it is necessary to grasp the performance of the circuit breaker itself in real time, and to detect the defects of the high-voltage circuit breaker in operation. Monitoring requirements are getting higher and higher. Especially the opening and closing time module of the high-voltage c...

AI Technical Summary

Problems solved by technology

The disadvantage is that the measured pre-breakdown time and arcing time of the circuit breaker have large errors

[0008] In short, the currently recommended on-line monitoring devices for circuit breakers, including those already in use, have their own shortcomings, especially the monitoring of the arcing time of the circuit breaker opening the main circuit and the pre-breakdown time of closing the main circuit is not enough, most of them can only To monitor the opening and closing action time of the circuit breaker when it is not charged

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