Online operation and maintenance method and system for secondary equipment in intelligent substation based on visual display

Abstract

The invention discloses an online operation and maintenance method and system for secondary equipment in an intelligent substation based on visual display. Advanced applications of a soft pressing plate of the intelligent substation are proposed, wherein the advanced applications comprise standard designing of the soft pressing plate and intelligent alarming for an in-service and out-of-service exception of the soft pressing plate. By implementing the function, the complexity and uncertainty of operation and maintenance overhaul of the intelligent substation can be reduced. Meanwhile, sequential control operations of a protection device are proposed to realize one-button sequential control for in-service and out-of-service protection and safety measure isolation. The risk of misoperation in the safety measure process is effectively reduced through solidifying in-service and out-of-service steps of the protection device. The technical schemes are experimented in a 220kV intelligent substation, and the operation status is good, so that the intelligent level of the substation is greatly improved. The configuration of a long-term expansion interval intelligent device is fully considered, and the concept of a replacement device is put forward, so that the blackout time in the long-term expansion process is reduced, modeling is carried out based on the IEC 61850 standard, and a theoretical foundation is laid for later implementation of the policy.

Description

technical field [0001] The invention relates to the technical field of online operation and maintenance of secondary equipment in smart substations, in particular to a method and system for online operation and maintenance of secondary equipment in smart substations based on visual display. Background technique [0002] In recent years, the development of communication network technology has created conditions for the application and promotion of smart substations, which has continuously improved the intelligence of substations. The smart substation replaces the hard wiring of the traditional substation with three layers and two networks, creating good technical conditions for the maintenance and status monitoring of relay protection equipment. [0003] The smart substation replaces the hard wiring of the traditional substation through optical fiber communication. The traditional secondary circuit wiring is expressed as an invisible abstract network message, which increases ...

AI Technical Summary

Problems solved by technology

Although the sequence control of substations is widely used, the operation ticket is still used for the switching-off and safety measures of protection devices, which is inefficient and error-prone

[0005] Moreover, the current substation sequence control operation is mainly aimed at the running state, and there are few studies on the operation sequence control of the protection device.

[0006] In addition, the current smart substation relay protection virtual secondary circuit is not intuitive, the state of the pressure plate is not visible, and the real-time status of the equipment’s soft pressure plate and maintenance pressure plate cannot be intuitively displayed

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