Research On Relay For T Transmission Lines Based On Wide Area Information

Relay protection is the most basic technical means of protecting electrical equipmentsafety and continuous-reliable power supply of electrical systems, which is also the mostimportant and most effective. Its ability to reliably action depends on the principle ofprotection, accuracy of information collection and rationality of setting tuning. In Jiangmencity, there is more than one T-connected transmission lines, the individual T-connectedtransmission line is directly connected user-substations or power plants.In order to ensure the supply of important user,solve the problems of protectionconfiguration to the complex grid structure, eliminate the defects that some T-connectedtransmission lines in Jiangmen in the traditional protection configuration which the delaydevice can not be of comprehensive analysis to the operating mode of the grid, set areasonable protection to the lines, this article will focus on designing a specialized relaystrategy and system for T-connected transmission lines based on wide-area information,researching a relay protection which can real-time change its protectionperformance,characteristics and tuning value, with a real-time understanding and certainadaptability to the way of power system operation and fault status.This article provides an overview of the research background and significance of theT-connected transmission lines based on Wide Area Information. Introduced and analysis theproblems of the tuning principles and setting calculation of tradition Relay protection of theT-connected transmission lines. Using Beijie network as an example, design an approachbased on graph theory to rapid analysis the power network topology and a T-connectedtransmission lines protection system structure with certain adaptive ability based on the widearea information, and the Actustment of protection characteristic, real-time tuning algorithm,proposed the tuning algorithm simulation and calculation analysis, to verify the correctnessand feasibility of this algorithm.