Design of a portable on-load tap changer system based on wireless ad hoc network

Abstract

With the rapid development of power systems, the workload of substation operation and maintenance is constantly increasing, and the voltage regulation process of transformers suffers from problems such as low efficiency and frequent operational errors. To solve this problem, a portable on-load tap changer remote control device based on a wireless ad hoc network is proposed. An Improved Filtering Algorithm (IFA) is used to accurately measure three-phase voltage, current, and transition resistance. Experimental results show that the IFA algorithm has a measurement error of 0.13% for three-phase voltage, 0.67% for current, and 0.08% for transition resistance. Compared with traditional algorithms such as mean filtering, median filtering, and weighted average filtering, the IFA algorithm has a significant advantage in accuracy. In three-phase synchronization analysis, the IFA algorithm has a three-phase current synchronization error of 0.05 ms, a three-phase voltage synchronization error of 0.07 ms, and a load current synchronization error of 0.03 ms, all of which are superior to other algorithms. The portable on-load tap changer remote control device for transformers based on a wireless self-organizing network, combined with an improved algorithm, can provide high-precision measurement and control during the voltage regulation process of power transformers, effectively improving the automation level and system stability of substations.