Engineers from the Nizhny Novgorod State Technical University (NNSTU) named after R. E. Alekseev have developed and patented a new method of digital protection of overhead power lines (PL). It increases the stability of the power system in case of failures in measuring circuits. The technology has already received a Eurasian patent valid in Russia, Kazakhstan, Belarus and other countries of the Eurasian Patent Community
Modern systems of remote protection of power lines monitor accidents and automatically disconnect damaged sections. However, their operation depends on the accuracy of voltage measurement — if the sensors give incorrect data, the protection may trigger erroneously, which will lead to cascading shutdowns. The new algorithm developed at NNSTU compensates for such failures, maintaining the operability of the protection even in case of malfunctions in the measuring circuits.
Digitalization of power systems increases the load on the networks, and the growth in the number of renewable energy sources (RES) makes their operation less predictable. According to experts, the introduction of intelligent protection systems is a key element of "smart grids" (Smart Grid), which should ensure stability even in emergency situations. The new development of Nizhny Novgorod scientists corresponds to this trend, reducing the risks of large-scale accidents.
The technology is especially relevant for critical facilities where power outages are unacceptable. In the coming years, it can be integrated into digital substations that comply with the IEC 61850 standard, which is being actively implemented in Russia.
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