Abstract:
This paper introduces an analytical tool for
remote monitoring of on-load power transformers. Dissolved
Gas Analysis, which is the most recommended and accurate
condition monitoring technique suitable for remote condition
monitoring, is selected as the analytical method in this tool.
Proposed setup supports remote condition monitoring by
drawing an oil sample to the gas extraction unit where the
dissolved gasses are extracted and sent to the gas analyzer
without deenergizing the power transformers. Non-Dispersive
InfraRed technology is used to measure the concentration of
extracted gasses and the results are communicated to the control
center using wireless technology. CO2/CO ratio and
Hydrocarbon analysis based on Duval’s triangle are used to
interpret the results for diagnostic purposes. Results obtained
using the proposed tool have been validated against a
commercial dissolved gas analyzer in order to certify the proper
functioning of the tool. This tool, once fully implemented, can be
used to monitor the condition of on-load power transformers
from a remote location.
