ALGORITHMS OF ELECTRIC NETWORK CONTROL OF A HYBRID POWER SUPPLY SYSTEM OF AUV

Abstract

The aim of the research was to control the electrical network of a hybrid power supply system for an autonomous underwater vehicle designed to travel over ultra-long distances over tens of thousands of kilometers. To overcome ultra-long distances, the urgent task is to minimize the specific consumption of electricity, provided that all consumers are provided with electricity. The relevance of the work is determined by the novelty of using a hybrid power supply system in autonomous unmanned underwater vehicles, consisting of heterogeneous sources of electricity operating on different physical principles. Due to the lack of research to date, related to the control of the hybrid power supply system, coordinated with the modes of motion of the vehicle in a wide range of speeds, the problem arose of developing control algorithms for the hybrid power supply system. To solve the problem, the reasons for the change in current consumption during the movement of the device were analyzed, the necessary conditions for connecting consumers to the bus ducts were formed, including providing all consumers with electricity in full, excluding the excess of the rated currents of each bus duct with consumption currents, minimizing electricity losses when passing through the conductor and through the equipment. In this regard, the possible configurations of the construction of the electrical network using conductors and equipment were analyzed, and losses on the current conductors and on the equipment used were estimated. Based on the results of the research, a graph of consumers' connections to the conductors was formed, and to determine the way of connecting each consumer to the energy source through the power grid, a connection path was determined that minimizes losses. The problem was formalized as finding the shortest path in a graph, and Dijkstra's algorithm was used as a basis to solve it. Based on the research results, algorithms were formed for the formation of ways to connect consumers to electricity sources through the power grid and an algorithm for controlling the switching of keys in the power grid when the consumption currents change. The developed algorithms were implemented in software, and a numerical experiment was carried out using a simulation model. The results of the experiment showed the correctness of the developed algorithms, and can be further used for implementation in the devices under development for moving over ultra-long distances.