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Zero-Sequence Current Protection Setting Caculation Of Line For High-Voltage Power System

Posted on:2008-07-20Degree:MasterType:Thesis
Country:ChinaCandidate:D Q JiangFull Text:PDF
GTID:2132360215970927Subject:Power system and its automation
Abstract/Summary:PDF Full Text Request
Nowadays, power enterprises have widely adopted computers forsetting calculation in relay protection of power system. Theirresearches focus on convergence boosting intelligence, impovingspeed and efficiency of setting calculation to relay protection ofpower system. Due to the merits of zero-current relay protectionequipments and complexity of setting calculation, setting calculationis based on nowadays methods and precious experience, researchmethod of zero-current relay protection setting calculation. The aim isto reduce setting calculation workload and increase softwarepracticability of setting calculation.Designing fault count contents of zero-current relay protectionsetting calculation. Simply introduce zero-current protection principlesand methods. Bring forward reasonable setting calculation methods.Namely:When operating network, adopt compensation current algorithmmodifies matrix elements; Analysis main factors of influencingzero-currentâ… and time-lag protection parts: fault position, faultstyles and operating modes and repeating calculation branch coefficientof time-lag protection parts, and putting forward reasonable selectionand calculation measure.The context have designed programs of setting calculation andgiven a computation example, some main proposals are suggested forfurther development.Nowadays, we depend on programs carry out setting calculation,These measures are helpful to setting calculation program and improve software of practicability of setting calculation.
Keywords/Search Tags:Fault Calculation, Zero-current, Setting Calculation Ways, Transmission Line Operating, Zero-current Branch Coefficient, Operating Mode
PDF Full Text Request
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