Misoperation-preventive locking method for transformer substation

Abstract

The invention relates to a misoperation-preventive locking method for a transformer substation. A communication adapter and a wireless base station used for establishing wireless data transmission between a computer key and a monitoring working station and a misoperation-preventive working station is arranged in an interval layer; the computer key obtains real-time position state information of electrical primary equipment by a station control layer via the wireless base station; and meanwhile, the computer key transmits an operating project and project completion condition to the station control layer through the wireless base station. By adoption of the misoperation-preventive locking method, real-time data interaction between the computer key and the misoperation-preventive working station and the monitoring working station can be realized, related information of the equipment in the transformer substation can be mastered in time, and sudden deflection or non-deflection in the operation of the equipment can be known so as to stop operation, so that accidents can be prevented while personal safety of the operation and maintenance staff can be ensured; and in addition, the misoperation-preventive working station has a five-prevention logic determination process, and the logic determination result forms an operation precondition whether the computer key can perform the next step or not, so that a malignant misoperation accident which is against the principle of ''five preventions'' can be avoided.

Description

technical field [0001] The invention relates to the technical field of electric power system automation, in particular to a method for preventing false locking of a substation. Background technique [0002] Electrical equipment is divided into four states: running, hot standby, cold standby, and maintenance. The process of changing the equipment from one state to another is called switching, and the operation is called switching operation. [0003] A substation is a place where the voltage is changed during the process of transmitting the electrical energy from the power plant to the user. When the switching operation is performed in the substation, if any misoperation occurs, it may endanger the safety of the person, the power grid and the equipment. The five misoperation events (referred to as "five preventions") are five misoperation events (referred to as "five preventions"). At present, the anti-misoperation locking system is widely used in substations of the national...

AI Technical Summary

Problems solved by technology

However, with the extensive application of the system, hidden safety hazards and inconvenient operation problems have also emerged, which are specifically reflected in the following two aspects: 1) The computer key cannot be obtained in real time during the operation process due to offline operation tasks. Equipment-related information cannot be terminated in time for situations such as sudden equipment displacement or operation unchanged in the station

For example, when carrying out the operation task of transferring the high-voltage line from inspection to operation, it is first necessary to open the grounding knife switch of the line, then close the isolating switch on both sides of the circuit breaker of the line, and finally close the circuit breaker of the line, if the grounding knife switch In fact, the opening is not in place, but continuing to operate according to the sequence of computer keys will cause vicious misoperation accidents with power transmission with grounding wires, endangering the safety of people and equipment

2) When the operation ticket contains multiple operation tasks of remote control operation and local operation at the same time, the operator needs to frequently return the operation ticket and switch the operation mode of the computer key, and the excessive operation of the computer key takes up the A certain period of time for power outage and transmission will be affected, which will affect the efficiency of switching operation

Therefore, when the state of the electrical equipment changes temporarily or the operated equipment does not reach the specified state, there is a great potential safety hazard in the switching operation under the existing anti-misoperation locking method.

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