Line voltage asymmetry in closed electrical networks with distributed generation as a source of electromagnetic interference

Abstract

The article reveals relevance of the problem of unbalance of line voltages in closed electrical networks with distributed generation as a source of electromagnetic interference, in particular, the problem of electromagnetic compatibility of coastal and ship technical equipment. There is presented mathematical description of the process of occurrence of conductive low-frequency EMF by the voltage unbalance coefficient in the reverse sequence and an algorithm for finding it; using the equations, parameters of this coefficient are described, such as mathematical expectation, standard deviation, probability of occurrence for the billing period, as a result, a computer program has been developed to calculate these parameters; a method for processing the obtained data of power quality indicators according to the found coefficient has been developed; an algorithm for balancing voltages in an electrical network based on finding the most optimal power supply scheme for end consumers (certificate of state registration of an electronic resource No. 23664).

On-Load Electromagnetic Compatibility Test and Simulation Closed-Loop of the Electric Drive System of New Energy Vehicles

“…Wang et al carried out the theoretical research on the electromagnetic compatibility of the battery management system, the power line conduction of the battery management system, the modeling and simulation of the radiation interference, and the electromagnetic compatibility test analysis of the battery management system [9]. Antonov et al determined the main interference sources and coupling paths of the high-voltage system, analyzed the influence of the interference sources generated by the motor controller and the internal switching devices of the DC/DC converter on the electromagnetic compatibility performance of the power battery, and established the power equivalent model of battery coupled interference and applied the extracted interference sources to the coupled interference model [10]. Based on the electromagnetic shielding theory and the finite element method, Dogra et al combined numerical simulation and the Robinson equivalent model method, and the factors affecting the shielding effectiveness of the open rectangular cavity were studied [11].…”