小型隔爆真空磁力起動器智能綜合保護(hù)系統(tǒng)的研究.pdf

1、河南理工大學(xué)碩士學(xué)位論文小型隔爆真空磁力起動器智能綜合保護(hù)系統(tǒng)的研究姓名：許世景申請學(xué)位級別：碩士專業(yè)：控制理論與控制工程指導(dǎo)教師：柳春生20040401河南理工大學(xué)碩士學(xué)位論文2ABSTRACTByanalyzingthespecificconditionoftheLVpowersupplysystemintheundergroundcoalmineandthemainfaulttypesthepresentconditionofth

2、eflameproofmagneticstarterprotectionsysteminourcountrytheintelligentintegratedprotectionsystemisdesignedbasedon80C196KCsinglechipmicrocomputer.Advancedmicrocomputerrelayprotectionalgorithmisadoptedinthesystem.Electricalf

3、aultssuchasshortcircuitoverloadovervoltagelackofvoltagecanbejudgedautomatically.Electricalparameterscanbedisplayedbyturns.Thefaultblockingssuchasshortcircuitblockingopenphaseblockingleakelectricityblockingthoroughlysettl

4、etheproblemswhichcauseselectricsparkafterpowersupplybecauseofshortcircuitopenphaseleakelectricitybeforepowersupplythusavoidingcausingcoaldustorgasexplosionaccidents.Thephasedetectiveshortcircuitprotectionbasedonmeasuring

5、powerfactorisappliedinthesystemwhicheffectivelydifferentiatesstartingcurrentofthelargemotorsandsymmetricshortcurrent.Sosensitivityandreliabilityofprotectionisimproved.Negativesequenceprotectionisadoptedtoprotectopenphase

6、andasymmetricshortcircuitbymeasuringnegativesequencecomponentswhichimprovessensitivityoftheprotection.Systemexperimentsprovedthatdesigniscorrectandfeasible.Advancedmicrocomputercontrolnewprotectionprincipleandperfectmicr

7、ocomputerprotectionalgorithmisappliedsothataccuracyandreliabilityoftheflameproofmagneticstarterprotectionsystemisimprovednotablywhichpromotesfurtherdevelopmentofLVpowernetworkprotectiontechnologyofundergroundcoalmineinou