Substation measurement-control device double-set redundant switching method

Abstract

The invention relates to a substation measurement-control device double-set redundant switching method. A substation comprises a substation control layer composed of a process layer, measurement-control devices and monitoring systems. The measurement-control device performs self-test at the same time in the process of operation, and operation modes of the devices are switched according to the preset logic based on the results of self-test. Compared with the prior art, the substation measurement-control device double-set redundant switching method can carry out the self-test of the measurement-control devices and the switching of the operation modes through software inside the measurement-control devices, and the real-time automatic and dynamic switching is realized. In the process of operation, the measurement-control devices discriminate own operation states separately and send the discriminated results to another device through two ways of a station control layer network and a process layer network, a main transport device can switch between a main transport mode and a standby mode based on the own operation states and the operation states of a standby device according to the pre-set logic, the reliability of the measurement data is effectively guaranteed, and the security of the substation monitoring system is improved.

Description

technical field [0001] The invention relates to the field of electric power system automation, in particular to a double-set redundant switching method of a substation measurement and control device. Background technique [0002] At present, the measurement and control devices in the field of power system automation are generally configured as a single set, and some engineering measurement and control devices adopt redundant configuration mode and full-station cluster backup mode. When the measurement and control device adopts a single set configuration, the measurement and control functions corresponding to the corresponding interval will be lost as a whole when the device is faulty or overhauled, and the data security related to measurement and control cannot be guaranteed; The system selects the switch according to the communication status, and the judgment condition is single. The switch cannot be started when the measurement and control device fails or some functions ar...

AI Technical Summary

Problems solved by technology

When the measurement and control device adopts a single set configuration, the measurement and control functions corresponding to the corresponding interval will be lost as a whole when the device is faulty or overhauled, and the data security related to measurement and control cannot be guaranteed; The system selects the switch according to the communication status, and the judgment condition is single. The switch cannot be started when the measurement and control device fails or some functions are missing. The switching scheme is not perfect and does not meet the current data security requirements of the power system; In the backup mode, limited by device resources, the measurement and control device used as the backup of the whole station cluster can only realize the function replacement based on digital input and output, and the function based on cable input and output cannot be replaced, and cannot realize redundancy in the true sense

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