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Implementation of online CM systems for power transformers in Saudi Aramco

Condition Monitoring (CM) refers to the monitoring of key parameters or indicators of equipment condition e.g., in high voltage (HV) equipment installed at power plants and utilities. In this paper, an overview of existing online CM systems at Saudi Aramco facilities is given. The details of two online condition monitors installed as pilot projects under Technology Pilot Program (TPP) for two power transformers in Saudi Arabia are given. The first system is an Online CM Transmitter for moisture, hydrogen and temperature measurements and the second is an Online Drying System to remove moisture from the oil and paper insulation of the transformer. The CM data is collected from the pilot installations and the trends are drawn for the continuous monitoring and diagnosis of the power transformers. The performance of the online CM systems and the accuracy of the CM results can be validated by comparing the measurement data with the results obtained from the oil samples analysis in the laboratory. In addition, the future implementation plan for company-wide deployment of online CM systems under TPP is given. In the future, the online CM systems will be integrated into existing Supervisory Control and Data Acquisition (SCADA) system for remote monitoring applications. By implementing these online CM systems at large scale, the overall maintenance costs of the power transformers will be reduced in the future. In this way, the optimized maintenance intervals will be obtained, resulting in enhanced power system reliability, availability and extended equipment life-time in the future smart grid environment.