Remote Monitoring of DT
Distribution transformers are critical equipments, which is placed very near to the consumers and catering to electrical power multiple feeders. Monitoring failure points or performance in-efficiencies (losses) of DTs are very important to ensure reliable power supplies to the customers.

Why DT monitoring required

• Critical end point of DISCOMs
• Reliability of supply
• Longer duration to identification the problems & rectification
• Exposed to severe environmental variations
• Widely varying load conditions
• Low power factors of consumer loads
• In rush currents due to prevailing faults
• Leakage of oil
• Energy auditing/loss estimations requirements

Remote monitoring of DTs and controlling of associated equipments (load break switch/circuit breakers) will enable utilities to monitor the condition of the power system and arrive at a  proper maintenance plan for the equipments. This will further help in critically isolating incoming or outgoing feeders of the DTs during higher demands or operational limits (voltage/currents). The remote monitoring system contains FRTUs housed inside the cubicle of DTs on floor mounted stations or installed at a separate pole mounted assembly, energy meters, breaker control relay. The centralized application will have two features.

• Operation monitoring: Continuously monitors the system parameters and facilitates continuous operating status of the equipments, generate reports.
• Emergency operation facility: In this mode, transformer OG operated based on the pre-defined boundary condition configured in the system.

The program shall fetch KWh,KVARh, power factor, Voltage for a period and calculates equipments behavior by calculating real time efficiency, all day efficiency, copper /constant losses,demands,currents,harmonics etc and voltage profiles for a period. The calculated data will be cross checked with boundary condition defined for the parameters. Severity of the failure further analyzed to its granularity, if transformer oil and temperature data available from the field.

Advanced Transformer Monitoring System
Advanced transformer monitoring solution will include software features customized for utility requirement. The functionalities can be implemented on compactable SCADA system or stand alone application or data can be integrated to existing SCADA/DMS systems of utility.
Features

• Interactive GUI for monitoring
• Monitors Winding temperature and Oil temperature using sensors
• FAN Control and switching
• LTC and tap position monitoring
• Indicate abnormal operating data and alarm conditions
• Communicates with sensors by serial, analog and digital interfaces