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Research On On-line Settings Verification And Pre-warning System Of Relay Protection For Regional Grid And Consumer

Posted on:2019-06-18Degree:MasterType:Thesis
Country:ChinaCandidate:J W LiuFull Text:PDF
GTID:2382330548989227Subject:Engineering
Abstract/Summary:PDF Full Text Request
With the advance of strong smart grid construction,China's power grid construction is already at the leading level in the world.The regional power grid plays a very crucial role in the national power grid structure as it not only undertakes the responsibility of connecting with the main frame of the national UHV transmission network,but also shoulders the mission of supplying power to users and maintaining social and economic stability.Therefore,there is an increasing demand for the stability of relay protection from the regional power grid.However,the particularity and the complexity of the setting of relay protection--various complicated factors need to be taken into consideration,and the work is relatively complicated,lead to the fact that the data protection and the setting value maintenance work of the relay protection in various places is not going on smoothly.At the same time,the need for online verification is on the rise.Thus it is of great application value to study the online verification and early warning of relay protection setting value.Because the online verification of relay protection setting value belongs to advanced application,and the data interface corresponding to regional dispatch management system is a prerequisite,this paper has proposed a method for obtaining online check model based on RelayCAC relay protection setting software and SCADA system.Starting from the design principle of the protection setting software,analyzing the object of its observable database,the data can be extracted according to the table model and its relation in the database,can be used as the real-time monitoring data source of a first and secondary device data in the device setting calculation process,and adjust to the changes of real-time data changes in grid operation,so that the problem of analyzing the real-time tracking and protection of the setting data is solved,which brings a breakthrough for the value management and checking of relay protection.At the same time,the paper has established a comprehensive method of value verification including a number of checks and balances such as horizontal,vertical,and sensitivity checks through the establishment of online verification and early warning system of relay protection setting value,achieving a full range of loop check value protection,and timely detection of potential loopholes.What's more,the paper has verified the correctness and practicability of the online verification software by calculating the engineering application examples.
Keywords/Search Tags:regional grid, relay protection, protection model data acquisition, online verification and early warning of setting value
PDF Full Text Request
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