Master’s degree is concerned with contemporary theme of digitalization of
transformer substations. With the advent of ''digital era'', a traditionally analog
secondary instrumentation and control systems within transformer substations are
increasingly becoming digital signals, with simplified ability to be processed.
Master’s degree comprises comparison between conventional and digital
substations, presentation of standard IEC 61850-9-2 within scope of substation
automatization and description of digital metering technology, such as fiber optic
current sensors and fiber optic voltage sensors. Comparison of conventional and digital
substation was performed on the case of “H’’ type main bus arrangement. Derived
from this case was the calculation of required copper wiring for conventional
substation and calculation of copper and optical connections for digital substations
between intelligent electronic devices within bay level and process level. After
calculation was performed, main focus was on economic analysis limited to control,
alarm, analog and status signals that are required between bay level and process level.
Conclusion, derived from results of quantity analysis, shows significant
reduction in required quantity of copper connections. Conclusion from economic
analysis shows that digital solution with process bus is more expensive than traditional
connections. However, due to other positive features, digitalization of the transformer
substation is becoming increasingly established. Master’s degree is concluded with an
overview of current and future challenges in the field of substation construction.