On-line
DGA Monitoring System |
CLP Power (CLPP) has some 50 units of 400kV and 330
units of 132kV transformers and reactors in the transmission network.
To provide an advance warning for a failure, an annual Dissolved
Gas Analysis (DGA) surveillance program is adopted by Regions and
Technical Services to monitor the DGA gases. Such DGA technique
employed is off-line. However, off-line DGA monitoring could not
provide hourly or daily monitoring and could therefore result in
losing track of a sudden or critical change of the DGA trend. As
new technology continuous to develop, the technology of On-line
DGA, as a continuous monitoring means for the healthiness of transformers,
is becoming technically viable with proven track record. |
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