Intelligent comparison-based online operation and maintenance method and system for secondary equipment of intelligent substation

Abstract

The invention relates to an intelligent comparison-based online operation and maintenance method and a system for the secondary equipment of an intelligent substation, and provides the high-level application of a soft pressing plate in an intelligent substation. The application comprises the standardization design of the soft pressing plate and the intelligent alarm for the feeding and withdrawingabnormity of the soft pressing plate. Based on the realization of the above functions, the operation and maintenance complexity and the operation and maintenance uncertainty of the intelligent substation can be reduced. Meanwhile, the sequential control operation of a protection device is conducted, so that the one-click type sequential control of feeding and withdrawing protection and security measure isolation is realized. The feeding and withdrawing step of the protection device is immobilized, so that the risk of misoperation in the security measure process is effectively reduced. According to the above technical scheme of the invention, the pilot operation can be carried out in a certain 220 kV intelligent substation, and the running condition is good. Meanwhile, the intelligent level of the substation is improved to a great extent. The configuration of an interval intelligent device during the long-term expansion process is fully considered, and the concept of a replacement device is proposed. The power failure time in the long-term reconstruction and extension process is shortened. Moreover, the modeling is carried out based on the IEC61850 standard, and a theoretical foundation is laid for later strategy implementation.

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 an online operation and maintenance method and system for secondary equipment in smart substations based on intelligent comparison. 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 incr...

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 does not have the function of intelligent comparison, and it is impossible to find out the inconsistency between the configuration SCD file and the actual running smart substation SCD file in time, so that it is impossible to find out the configuration of the smart substation secondary equipment in time mistake

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