Power supply scheme selection method of grid type underwater constant current remote supply network

Abstract

The underwater remote power transmission system realizes the grid expansion of power supply range by means of constant current branch technology, but there are many different power supply combination schemes of main power supply loop and branch power supply loop. Different constant current transmission loops, including different underwater nodes and submarine cable sets, make the power supply combination schemes have different effects on the reliability performance of the underwater constant current remote supply network, it is necessary to study the method of evaluating the merits and demerits of the power supply scheme so as to maximize the reliability of the underwater cable network. Firstly, based on the working principle of constant current transmission, the diversity of power supply schemes is analyzed, and the connected graph abstract method of power supply schemes is proposed. Secondly, the reliability model of PBU, the key component of constant current branch power supply technology, is established, and related reliability analysis is carried out. Finally, the survival node rate is defined as the evaluation index of power supply scheme, and the selection method of power supply scheme is proposed from the Angle of network resistance to artificial attack and its own reliability respectively. By synthesizing the analysis conclusion of the two selection methods, the appropriate transmission scheme is selected for the grid constant current remote supply network.