Contribuição ao Estudo da Qualidade da Energia Elétrica em Navios.

Abstract

New technologies in the naval area, from the intensive and extensive use of Power Electronics, have enabled the concept of "All-electric Ship", with consequent operational improvements of vessels such as: greater maneuverability, creation of high-power weapons, reduction of maintenance costs and increased flexibility. Although the benefits of this technological evolution are unquestionable, the changes brought, among others, concerns in relation to the Power Quality, PQ of the on-board electrical network. Solutions such as energy storage systems, active and passive filters, high quality rectifiers, converter control techniques, etc., are being studied and developed to reduce PQ problems. The purpose of this work is to analyze the main standards on PQ for ships’ electrical networks. Study the main electrical power quality (PQ) problems in modern warships which adopts the All Electric Ship concept, which allows all vessel loads to be powered by a single set of generation equipment, in this case electrical generators. The electrical network is composed, on the one hand, by AC generation and DC network throughout the rest of the ship. The conversion from the AC side to the DC side is carried out using a rectifier. The DC side feeds conventional loads, and high power loads such as propulsion motor and pulsed load. The pulsed load model is the representation of loads used on warships, in combat situations, such as Aircraft Electromagnetic Launch System, Electromagnetic Weapons (Laser Ray Cannon), Radars and Sonars. In order to verify the operation of the on-board electrical network, as well as its PQ problems generated by the high power loads, both on the AC side and on the DC side, the simulator Typhoon Hil 604 ® was used, with high computational capacity, allowing to simulate complex systems, with multiple converters and their controls that are part of the analyzed structure.