Bus differential protection optimization method and bus differential protection system of intelligent substation

Abstract

The invention discloses a busbar differential protection optimization method and a busbar differential protection system for an intelligent transformer substation. The method comprises the steps of grouping merging units, arranging two network ports capable of transmitting sampling value data frames with different priorities on each merging unit according to a group of the merging unit, and connecting with two networks, and allowing busbar differential protection equipment to select the sampling value data frame with the high priority for busbar differential protection calculation when receiving the sampling value data frames with the same data content. The device comprises a busbar differential protection device and two merging unit groups, wherein each merging unit group is connected with the two networks respectively via the two network ports capable of transmitting the sampling value data frames with the different priorities, and further, the sampling value data frames with different priorities can be transmitted to the busbar differential protection device, so that the busbar differential protection equipment operates quickly. The method and the system can effectively improve the performance of a communication network of a process level, particularly has the characteristic of quick operation of busbar differential protection, and is high in efficiency and low in implementation cost.

Description

technical field [0001] The invention relates to a network structure of an intelligent substation, in particular to a bus differential protection optimization method and a bus differential protection system of an intelligent substation. Background technique [0002] IEC 61850 is a public communication standard based on a general network communication platform proposed to facilitate the management of various intelligent electronic devices in substations and the interconnection between devices. In the mode where the process layer of the smart substation based on IEC 61850 adopts the networking mode as the message transmission mode, the end-to-end delay characteristic of the message is an important indicator of the performance of the communication network, and the network delay of the sampled value message will also affect the Action characteristics of protection to the spacer layer. Because bus differential protection needs to collect real-time electrical quantity information ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a bus differential protection optimization method and a bus differential protection system of an intelligent substation to solve the problem that the communication network using a parallel redundancy protocol in the intelligent substation does not improve the performance of the process layer communication network, especially the fast bus differential protection. Technical issues with action features

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