DEVELOPMENT OF APPROACHES TO FILTERING INACTIVE AND ACTIVE VOLTAGE ON POWER SUPPLY BUSBARS IN THE SHIP'S ELECTRIC POWER SYSTEM

Abstract

The aim of the article is to develop approaches to voltage filtering on power supply buses in the ship's electric power system, which allows to ensure complete elimination of harmonic components of current and voltage in any supplying electric power networks, both with infinite generating capacities and comparable to the power consumed by the load, under any linear and nonlinear loads. This goal is achieved by developing two approaches to filtering inactive and active voltages on power supply buses in a ship's electric power system. It has been established that one of the characteristic features of modern ship power systems is that they contain a significant amount of equipment, such as rectifiers, inverters, frequency converters and uninterruptible power supplies, in which the voltampere characteristics are non-linear. This equipment generates higher current and voltage harmonics, which adversely affects the AC power supply network. These harmonics can cause resonance phenomena in the ship's electrical power system, disrupt the operation of special computer equipment, relay protection and automation devices, and accelerate the aging of the insulation of the main electrical equipment, which ultimately reduces the reliability of power supply to consumers of an autonomous facility. Therefore, more and more attention are paid to the development of means and methods of active control of power generation and distribution in accordance with certain requirements to ensure the required power quality and eliminate the interaction of parallel equipment with the power grid. The most significant result is, firstly, a method of generating compensatory current to the power grid that ensures full compensation of inactive components of the consumer's current, and secondly, an approach to voltage filtering on the power buses that ensures joint operation of sharply variable power loads with electrical receivers sensitive to voltage distortions. Thus, it has been established that the use of even basic power quality management systems can provide a significant increase in the performance of the power supply network welding equipment.