Abstract

The spread of the new generation of Low-Power Instrument Transformers (LPITs) is enhancing the set of monitoring tools that System Operators (SO) can use. For example, LPITs are smaller, compacter, much easier to install, and more flexible compared to the old generation of inductive Instrument Transformers (ITs). Therefore, new monitoring strategies for the control and management of the Distribution Network (DNs) can be developed and implemented. However, new devices are seldom supported by consolidated Standards. In fact, even if standards on ITs exist, some aspects still need more research. To this purpose, this paper studies the combined effect of humidity and temperature on 3 different off-the-shelf Low-Power Current Transformers (LPCTs). The adopted LPCTs are the Rogowski coils (RCs). A dedicated measurement setup has been developed, and specific tests have been designed starting from some inputs given in the standards. The RCs have been evaluated in terms of the well-known ratio error and phase displacement. Finally, the obtained measurement results clearly demonstrate the key role of temperature and humidity on the accuracy performance of the RCs. Consequently, humidity and more complex tests should be considered for being added in the future versions of the standards.

Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call