APPLICATION OF FUZZY LOGIC TO CONTROL THE POWER OF COAXIAL GENERATORS USING DUAL POWER HETEROGENEOUS POWER MACHINES

Abstract

Ship power stations are becoming more and more modern with today's energy management and monitoring control systems. With large tonnage ships, the power station always aims at an optimal exploitability in the sea voyage to reduce energy consumption, reduce operating time and reduce noise, reduce environmental pollution, avoid adverse impacts on humans as well as the natural environment. For large vessels, the transmitting station is usually designed with coaxial generators working together with diesel-generator (DG) assemblies. The model of a generating station using the main machine to drive the generator in combination with several diesel generator sets for the purpose of generating electricity is a model that is appreciated for both technical and economic features. With dimming controllers, there is a new development direction in the field of system control research. Dimming controllers are, in principle, nonlinear static controllers. They can be designed with a given system quality to an arbitrary precision and work according to the principles of human thinking. On the basis of the mathematical model of DFIG is built on an appropriate static coordinate axis, oriented according to the grid voltage vector to have an isolation between the effective power control and the reactive power on the stator side of the generator. With this reference coordinate system orientation technique, it is possible to control the consumption or transmission of reactive power completely independently of the control of the real power operating modes. Because the DFIG stator is directly connected to the grid and the stator voltage is fixed according to the grid voltage, so the target of independent control of the effective power and the reactive power on the side of the DFIG stator of the generator is attributed to the goal of independent control of the two α shaft components and the β of the stator current vector in the normal operating mode.