A relay protection device calibration auxiliary equipment and monitoring system

Abstract

Embodiments of the invention provide relay protection device verification auxiliary equipment and a monitoring system, and relates to the field of substation operation maintenance equipment. The verification auxiliary equipment comprises an analog circuit breaker and a processor. The analog circuit breaker comprises a first relay group and a second relay group, wherein the first relay group and the second relay group are coupled with a protection device. The processor is coupled with the first relay group and the second relay group. The first relay group is used for receiving a closing signal output by the protection device, and outputting the closing state to the processing according to the closing signal; and the second relay group is used for receiving a tripping signal output by the protection device, and outputting the tripping state to the processor according to the tripping signal, thereby avoiding the defect that the reliability of power supply is influenced due to direct use of a circuit breaker in a substation.

Description

technical field [0001] The invention relates to the field of substation operation and maintenance equipment, in particular to a relay protection device calibration auxiliary equipment and a monitoring system. Background technique [0002] According to the requirements of relay protection technical supervision, the regular inspection of safety equipment and protection devices such as standby automatic switch-on devices, low-frequency and low-voltage load shedding devices, busbar protection and main transformer protection devices that are newly put into production must pass the transmission test with switches. Ensure the reliability of the device and the correctness of the external circuit. This ensures that the device can operate correctly after the equipment is disconnected due to a fault or other reasons, ensuring the safety and reliability of the power grid. At the same time, according to the practice of relay protection test, before doing the switch transmission test, a ...

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Problems solved by technology

[0003] At present, there are problems: (1) In addition to the analog voltage and current, the test of the automatic switch-on device also needs to involve the position of each circuit breaker and its position change. Generally, the test in the infrastructure is to use the open circuit The actual position of the circuit breaker is used for switching and transmission, but the regular inspection of the circuit breaker in the normal operating state after the substation is expanded, technically upgraded and put into production, or the equipment self-switching device is added to the already operating substation, taking into account the power supply. Reliability, the transmission test cannot be carried out at all, and the cooperation of multiple people is required for the device inspection, and the cooperation is difficult

If the transmission is not performed, the reliability and correctness of the logic of the standby automatic switching device and its circuit cannot be guaranteed; (2) There are many tripping outlets of the busbar protection and low-frequency and low-voltage load shedding devices, and the sequence of tripping outlets varies according to different types of protection. There are first and second, and the circuit breaker transmission test cannot be carried out during the regular inspection. When verifying whether the outlet is correct, because the outlet time is fixed, it is difficult to verify the correctness of the outlet; (3) There are many outlet contacts during the regular inspection of the main transformer backup protection. It involves multiple outlet contacts such as jumping low section, jumping the main side, jumping three sides, blocking standby automatic switching, and connecting small hydropower. At present, before the transmission test, it can only be measured by a multimeter or using the switch value input of the protection calibrator. Verification, the verification process is complicated and cumbersome, and it is necessary to carry out step-by-step verification of each contact point after multiple protection actions, so that the efficiency is low in the intense regular inspection and technical transformation work, and the measurement on the protection screen terminal has been mistakenly touched many times The risk of tripping the circuit to the operating equipment, resulting in the risk of forced power outage of the operating equipment

(4) The following problems will be encountered in the regular inspection equipment after the power failure: 1. Repeat the whole set of tests, the high-voltage circuit breaker repeatedly jumps and closes the test action, shortens the life of the high-voltage circuit breaker, and brings mechanical damage to the mechanical structure of the high-voltage circuit breaker. Fatigue; 2. Annual pre-test and scheduled inspection. The relay protection debugging personnel and the high-voltage circuit breaker maintenance personnel compete for the high-voltage circuit breaker at the same time. The maintenance personnel of the high-voltage circuit breaker and the relay protection device debugging personnel can only take turns. Let the staff who overhaul the high-voltage circuit breaker check and repair the high-voltage circuit breaker first, and then the debugging personnel of the relay protection device will debug the relay protection device. As a result, the power line outage time is prolonged and the work efficiency is low.

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