MUMBAI, India, Sept. 28 -- Intellectual Property India has published a patent application (202511017034 A) filed by Hitachi Energy Ltd on February 26, 2025, for A Method Of Determining A Mode Of Operation Of A Protection Device In A Multi-Phase Power Transmission System.
Inventors include Westman, Bjorn; Obbalareddi, Demudu Naidu; and Krakowski, Marcin.
The application for the patent was published on September 25, 2026, under issue no. 39/2026.
Abstract: The present invention relates to a method of determining a mode of operation of a protection device in a multi-phase power transmission 5 system, an operation mode determination element and respective computer program product, capable of and configured for determining phase currents of the phases of the multi-phase power transmission system; determining sequence currents, comprising zero sequence current and negative sequence current, from the phase currents; determining a zero sequence 10 current decision value by means of a zero sequence current magnitude criterion and a zero sequence current magnitude ratio criterion, determining a negative sequence current decision value by means of a negative sequence current magnitude criterion and a negative sequence current magnitude ratio criterion, and determining the mode of operation, within a 15 group of several modes of operation, to be applied, by means of the zero sequence current decision value and the negative sequence current decision value.
Disclaimer: Curated by HT Syndication.
