DETECTINGANDLOCATINGCANCELINGFAULTS INSHUNTCAPACITORBANKS
OBJECTIVE
Todevelopandbuildatestbedtotest analgorithmthatcandetectsymmetric &asymmetriccancelingfaultsinshunt capacitorbanks(SCB)Thetestbed canalsobeusedinprotectionclasses.
VALUEPROPOSITION
1.ShuntCapacitorBankshortcircuits:
-Capacitorsfailshorted,shortsparallel capacitors;
-Overvoltagedevelopsovertheother un-faultedserieselements,possiblyfail;
-CurrentflowsincenterbranchofH bridge,protectiverelayscandetect faultsbasedonthatcurrent.
2CancelingfailuresinShuntCapacitor Banks:
-Failureofcapacitorsindifferentlegsof Hbridgeremovesvoltageandcurrent imbalance.Difficulttodetect;
-Ourgoalistobuildatestsystemto createsymmetricandasymmetric cancelingfailuresandprovide measurementdatatoarelay.
Figure6: Rp=16.73MΩ； R1-8=1MΩ; Cost:Free
Figure7: 45+5uf±5% 440VAC50/60Hz Cost=$15.85perunit
KEYREQUIREMENTS
-ATPmodelandlabscalemodelshouldbeableto createsymmetricandasymmetriccancelingfaults.
-Voltageandcurrentmeasurementpointsshouldbe addedtotheH-bridge.
-Faultconnectionpointsmustbewithswitches.
-Simulationmodelshouldmatchthephysicaltestbed
CONCEPTDEVELOPMENT& CONCLUSION
Firstversion:Using4capacitorstobuildtheH-bridgeat “ATP”simulation;Secondversion:Using8capacitorsto buildtheH-bridgein“ATP”andhardwaremodel;Third version:Using8capacitorsin“ATP”andhardware modelthenconnectprotectiveresistorsandshortthe capacitorsusingswitchesinparallel.Finally,buildthe finallabversion.
TEAMMEMBER
MohammadAlEbedan, ZeshengGuo, PeiChengJi, ZeyingChen
ACKNOWLEDGEMENTSSELClients:Dr.SatishSamineni,Dr.JadaHawaz; UniversityofIdahoInstructors:Dr.YacineChakhchoukh,Dr.BrianJohnson,Mr.SebastianGarcia
