A Digital Relay Protection Device Supporting Three Networks in One Network

Abstract

The invention discloses a digital relay protection device supporting a three-network-in-one network, comprising a multi-channel Ethernet interface module supporting an interface with a three-network-in-one network; supporting SV sampling value, GOOSE, station control layer and PTP report Ethernet frame preprocessing IP core module for text frame sending and receiving; adaptive multi-channel sampling value data synchronization module; and data receiving and processing module for relay protection device protection, measurement and control, measurement, and interlocking functions to realize smart substation relay protection and automation functions. The present invention can be used in the smart substation to realize the data sending and receiving processing in the station based on the sampling value networking or the three-in-one common network transmission and the fast protection of the power grid fault, and it is the function realization of the relay protection equipment based on the unified network framework of the current smart substation A solution is provided, which can simplify the interface of the relay protection equipment and reduce its data processing capability requirements, and improve the stability and reliability of the relay protection equipment operation.

Description

technical field [0001] The invention relates to a digital relay protection device supporting a three-in-one network, and belongs to the technical field of electric power system intelligent substations. Background technique [0002] According to the description and requirements of the IEC 61850 substation communication network and system standard, the equipment of the intelligent substation integrated automation system is arranged in three layers according to its functions: process layer, interval layer, and station control layer. In the long run, the substation network structure will be gradually improved in three stages, namely, point-to-point mode, process-level bus mode, and station-level bus, that is, "three networks in one" mode. [0003] In the smart substation network, relay protection equipment such as protection measurement and control devices need to realize synchronous collection and processing of the voltage and current of the inter-interval equipment connected t...

AI Technical Summary

Problems solved by technology

If the sampling value message is directly sent to the main CPU for processing without processing, then not only the transmission bandwidth of the main CPU is not enough, but also the data processing capability of the main CPU cannot meet the requirements of such a large flow of message processing, which will greatly affect the relay protection device performance and work stability

[0005] At the same time, the existing smart substation engineering application method that uses the station control layer network, sampling value network, and GOOSE network to network separately requires a large number of relay protection devices and a large number of external interfaces. The interfaces are diverse and cannot be standardized. The network structure of the system And optical fiber link configuration is complex, resource sharing is not easy, and the cost of equipment development and project implementation is also high

These deficiencies all restrict the development of smart substation technology, do not give full play to the technical advantages of the IEC 61850 standard, and cannot meet the needs of future substation technology development

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