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Research Centre BRESLER Modern Fault Location Technique for the Utility A.Podshivalin, I.Klimatova, E.Terentyev Reporter: Andrei Podshivalin Department Manager, PhD Research Centre BRESLER Russia
Page 2 Research Centre BRESLER Date: © Research Centre BRESLER High accuracy of distance estimate –better than 2 %, 300 m Prompt automatic response Versatile solution Dependable operation servicesApplication services Requirements to Fault Location
Page 3 Research Centre BRESLER Date: © Research Centre BRESLER Fundamental-harmonic distance methods Fault Locations Solutions High-frequency distance methods Location Traveling wave Topographical/Geographical methods Fixed-site Portable Option in protection Autonomous IEDs PC Software
Page 4 Research Centre BRESLER Date: © Research Centre BRESLER distance principleAutonomous IEDs distance principle –Efficiency getting information directly at the substation precision –Sufficient precision < 2 %error < 2 % of line length –Complementary –Complementary functions recorder notifications and signaling Advantages of Implementation ZfZf RfRf LfLf
Page 5 Research Centre BRESLER Date: © Research Centre BRESLER adequacyModel adequacy to the real object –ability to reproduce object behaviour nformational componentsInformational components extraction Fault criteriaFault criteria and fault coordinate search algorithm Accuracy Factors ~ ~
Page 6 Research Centre BRESLER Date: © Research Centre BRESLER Models. Special Sections Modeling Modeling is crucial to accuracy Parameters to consider Taps Parallel lines
Page 7 Research Centre BRESLER Date: © Research Centre BRESLER The multi-pole technique Models. Taps Equivalent
Page 8 Research Centre BRESLER Date: © Research Centre BRESLER Single parallel lineSingle parallel line current influence Models. Parallel Lines Equivalent measured - Parallel line current is measured unknown - Parallel line current is unknown U s(0) – U r(0) = Z (0) I (0) + Z (01) I (1) 0 = Z (01) I (0) + Z (1) I (1) U s(0) – U r(0) = Z eqv I (0)
Page 9 Research Centre BRESLER Date: © Research Centre BRESLER Multi parallel lineMulti parallel line current influence Models. Parallel Lines Equivalent Automated precise method for multiple parallel lines
Page 10 Research Centre BRESLER Date: © Research Centre BRESLER Informational Components Pre-fault values –load –load current compensation Better filtering –DCsaturation –DC component removal, CT saturation compensation Fault inception point – UHV lines –superposed components application Recording Pre-fault conditions Actual conditions i(t) t More information – higher accuracy
Page 11 Research Centre BRESLER Date: © Research Centre BRESLER Fault Criteria Choice Criterion – Resistive Criterion – Resistive fault impedance RfRfRfRf Pre-fault values –elimination of algorithmic mistake Phase-segregatedPhase-segregated criteria –full information usage WeakWeak dependency on R f
Page 12 Research Centre BRESLER Date: © Research Centre BRESLER Settings Calculation Automation Power system model Line data Automatic settings calculation Settings + Fast + Accurate
Page 13 Research Centre BRESLER Date: © Research Centre BRESLER Transmission line «Cheboksary HPP – Chigashevo» Application A-N: 22,5 kmB-C-N: 45,0 km 22,2 km43,9 km Real data: Calculation data: The goal function 220 kV 75,6 km
Page 14 Research Centre BRESLER Date: © Research Centre BRESLER SettingsSettings calculation collectionFault data collection InformationInformation presentation Application Services Settings Distance to the fault Database Distance to the fault Fault resistance Time stamp Fault values Server
Research Centre BRESLER www.ic-bresler.ru Modern Fault Location Technique for the Utility A.Podshivalin, I.Klimatova, E.Terentyev Reporter: Andrei Podshivalin.
The Concept of Settings Calculation for Modern Protection Andrei Podshivalin, Research Centre BRESLER 30.06.2011, Dublin, Ireland.
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