STUDYING THE CONTROLLING EFFECTS OF ELECTRICAL NETWORK EQUIPMENT ON THE VOLTAGE REGIME IN THE SHORE-TO-SHIP INTERACTION SYSTEM

Abstract

The aim of the article is to study the controlling effects of electrical network equipment on the voltage regime in the shore-to-ship interaction system to improve the efficiency of power supply to a water transport enterprise. This goal is achieved by studying the scheme of substitution through power transmission sections in the shore-to-ship interaction system. It has been established that such sections can be considered, firstly, the section from the power supply to the transformer, secondly, the power step-down transformer, and thirdly, the standard marine electrical cable. It is proved that in the system of interaction between the shore and the ship, the capacitor bank and step-down transformer play an important role in managing reactive power. The capacitor bank compensates for the reactive power in the grid, and the step-down transformer affects the control of reactive power. Both control methods have the same modulus, but opposite sign, influence on the voltage regime during transients, which determines the difference in their impact on the system. The most significant result is the development of substitution schemes through power transmission sections in the shore-to-ship interaction system, considering the proposed equations for describing the control influences of electrical equipment of the power grid. It is determined that the negative impact controlled by a capacitor bank can adversely affect the mode of electricity transmission. A voltage reduction leads to a decrease in the power generated by the capacitor bank in proportion to the square of the voltage, which can lead to insufficient reactive power in the power system and a further voltage reduction. Controlling the step-down transformer has a positive effect. This means that a 1% change in the mains voltage causes a 2% change in reactive power consumption. Thus, the control influence of the step-down transformer has a double effect on the voltage regime in the transmission: positive, which contributes to voltage stabilisation, and negative, which prevents reverse voltage regulation.