Transforming plant integrated protection system based on IEC61850

Abstract

The invention discloses an integrated protection system of a transformer substation based on IEC61850. The information about voltage, current and the like of the transformer substation marks GPS clock information by a combination unit; the switch state information of the transformer substation is collected by an intelligent operation box and marks the GPS clock information; and the information about voltage, current and switch state is sent to a protective main station system by Ethernet. The protective main station system judges whether the transformer substation has a failed electrical component according to the uploading information; a tripping operation order is sent to the intelligent operation box by Ethernet if a failure occurs; and the intelligent operation box trips off the corresponding breaker and is insulated from the failure. The protective main station comprises four host computers, wherein, two are used as the main protection for the transformer substation, and the other two are used as the standby protection for the transformer substation. Either host computer of the two used as the main protection can give a tripping operation order if detecting a failure. The two host computers for the standby protection are directly connected by special network, and can give a tripping operation order if detecting a failure at the same time, so that standby protection misoperation is avoided.

Description

technical field [0001] The invention belongs to the field of relay protection and automation of electric power systems, and in particular relates to an integrated protection system for substations based on IEC61850. Background technique [0002] The IEC61850 standard is a substation automation system standard issued by the International Electrotechnical Commission (IEC). China has transitioned from the standard research stage to the engineering application stage, and several substations based on the IEC61850 standard have been put into use. The IEC61850 standard represents the development direction of substation automation technology. [0003] After adopting the IEC61850 standard, all the information of the substation can be transmitted and shared through the network, so that the relay protection device can obtain more information, thus creating the necessary conditions for the application of the new relay protection principle. However, there is no clear technical solution...

AI Technical Summary

Problems solved by technology

[0004] The protection devices in substations that do not adopt IEC61850 are independent of each other in space, and the mutual cooperation in function is realized through the electrical connection of secondary cables. To ensure the reliability of mutual cooperation and avoid electromagnetic interference in the substation, a certain delay is required to identify the status information of these cables, which will cause the action speed of the protection device to be lost

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