Abstract:
The object of the study is the conceptual prototype of a microprocessor
resource-saving relay protection system.
Currently, relay protection ensures electrical networks reliable and efficient work,
however, the traditional architecture is
proprietary, not allowing to fix and replace
damaged parts without a company specialist. Therefore, the open-architecture
relay protection is a very pressing issue,
but the problem lies in meeting the relay
protection requirements. The data transmission protocols nRF and ESP-NOW,
Hall sensors evaluation for AC current
measurement determination and sensor
accuracy improvement was implemented. Experimental validation demonstrated that nRF and ESP-NOW protocols
meet the delay and reliability requirements, however, the nRF protocol is more
suitable due to its flexibility and obstacle penetration. The data demonstrated that the most effective conditions are
without obstacles at 15 meters from the
modem and with obstacles 5 meters from
the modem. The experiment of Hall sensors characteristics determination demonstrated the accuracy of current measurement with the set values of the opening
and closing currents. Nevertheless, it is not
accurate (12.45 %) for the relay protection application. Therefore, the application of the changing values of the opening
and closing currents is more effective and
accuracy reaches 6.92 %. As a result, the
service life of the Hall sensor was determined, and even after 10 million openings,
the open state time remained unchanged.
Therefore, the approximation function for
current amplitude determination depending on open state time was found. On the
other hand, Hall sensors may suffer from
temperature drift and require further optimization to be fully reliable. The study limitation is the current range from 0 to 800 A
