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The saturation of the ferromagnetic core in electrical machines significantly affects their performance. In the steady-state and dynamic analyses of electrical machines, an accurate representation of the saturation characteristics in the machine simulation model is important. In this paper, a new trigonometric algorithm has been developed to represent the saturation characteristics of electrical machines,...
This paper proposes a new energy storage system based on flywheel called the multi-functional flexible power conditioner (FPC). It consists of the doubly-fed induction machine (DFIM) with very large rotating inertia and a voltage-source pulse width modulation (PWM) rectifier-inverter used as an AC exciter. A simulation model for FPC is built up and is simulated in three operating states, including...
This paper proposes a double-fed induction machine with a flywheel energy storage system called the multifunctional flexible power conditioner (FPC). It consists of the doubly-fed induction machine (DFIM) with very large rotating inertia and a voltage-source pulse width modulation(PWM) rectifier-inverter used as an AC exciter. A FPC 10 kW model machine is developed. A simulation model for the model...
The doubly-fed induction machine is widely used in variable speed ac drives. Accurate characterisation of the machine is important to optimise its efficiency and functionality. A novel characterisation method using the series-coupling test approach has produced favourable results in characterising this machine. This paper reviews the series-coupling tests and compares their results with IEEE Standard...
The use of the doubly-fed induction machine variable speed ac drives has increased in recent years and this has led to an increased interest in obtaining an accurate equivalent circuit model for the machine. This paper presents a novel method for characterising a doubly-fed induction machine and compares the results with IEEE Standard 112. The method comprises the open-circuit stator, the open-circuit...
For modern large wind farms, it is more and more interesting to design an efficient diagnostics system oriented to wind turbine generators based on doubly-fed induction machine (DFIM). In this paper, a complete system will be analyzed by suitable simulations to deeply study fault influence and to identify the best diagnostic procedure to perform predictive maintenance. All the research efforts have...
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