Monitoring and Diagnosis Items Transformer Oil Degradation (Dissolved Gas) •Performreal-timemeasurementoftheamountofH , CO, C H and 2 2 2 C H etc., generated in the transformer tank 2 4 •Issuesanalarmwhentheamountofdissolvedgasexceedsthesetlimits or shows an abrupt change •Performself-diagnosisandissuesalarmsintheeventofsensorfailure Hot Spot Monitoring •Robustfiberoptictemperaturesensorswhichwereinstalledon insulation spacer or surface of coil provide the exact temperature of hot spot directly •Usingtherealtimetemperature,efficienttransformeroperationis possible On-line Bushing Monitor •Bushingmonitoringsystemproviderealtimeinformationofbushing condition •Installcouplingunitsonbushingofpowertransformerinorderto measure PD activity and capacitance OLTC Monitoring •Indicatesthepresentvalueandtrendforcontactwear,torque,OLTCtemperature,andoperatingfrequency •Issuesalarmsandpresentsinspectionmessageswhenthe threshold value are exceeded Transformer Oil / Winding Temperature Indicates for each tank the present value and trend for top oil temperature, ambient temperature, load current, average oil temperature increase, and winding Hot-spot temperature Cooling Fan / Pump Motor Operating Condition Diagnoses the operating condition of transformer fans and pumps and the operating status of current fans and pumps, issues alarms when current exceeds the threshold value, and operates the TM-2000 system to inform the operator about what has caused the problem (e.g., power failure, motor failure, overload)
On-line UHF PD Monitoring System for Transformer HiCMS TM-1000 The HiCMS TM1000 is a monitoring system for assessing the condition of transformers in the field. The system is an on-line partial discharge (PD) monitoring system for power transformers. By monitoring the in-service partial discharge, the insulation performance can be reliability assessed over time and proper maintenance can be taken before a failure occurs. DAUFeatures •HighsensitivePDdetectionfortransformerbasedontheUHFPD measurement technique •LocationestimationofPartialDischargepositionintransformerusing the time of flight method. •AnalysisalgorithmtoclassifybothPDandbackgroundnoise.•Usingnoisemaskingtechnology,reliablediagnosisispossible. •Fullyprotectedagainstsurgeandtransientovervoltage HMIDAU Specification Item Specification Detection frequency bandwidth 300 ~ 1,500MHz Input signal level -85 ~ 0dBm Detection sensitivity Less than 1pC No. of Input channel 12ch Operation temp. -25 ~ 60℃ I 14 15 HiCMS Hyosung intelligent Condition Monitoring System