Modelling and control of single VSI leading experimental hybrid power system integrating a wind turbine simulator
This paper discusses a hybrid wind diesel system aims to validate wind powered section of the experimental system. The experimental system proposed consists of a wind turbine simulator, a permanent magnets generator, a diode bridge rectifier, a step down converter, a bank of battery, a load and a control unit. An other operation of three-phase, four-wire voltage source inverter (VSI) under unbalanced voltage conditions is also investigated.
Hybrid control of 1.5MW doubly-fed wind turbine generator based on automata model
Wind turbine generator (WTG) system is a complex system involving continuous subsystem and discrete subsystem. A fact was discovered that WTG showed the typical feature of hybrid system by analyzing its characteristics. Therefore, the hybrid dynamic model of 1.5MW Doubly-fed WTG was built based on theory of hybrid automata, at same time hybrid control system was designed for solving the problem of the global automation according to the WTG control strategy. Emulation results present the hybrid automata model can accomplish the global simulation of WTG, and the designed hybrid control system fulfills the demand of global control. Moreover, the validity and practicability of applying hybrid system theory in the field of wind power are demonstrated.
Design and implementation of a digitally controlled stand-alone photovoltaic power supply
An implementation of a digitally controlled stand- alone PV power supply consisting of PV array, battery and inverter is presented. Peak power tracking using Incremental conductance algorithm and four state battery charging with temperature compensation are described. Some simulation results are presented.