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This paper focuses on normal operation control of permanent magnet synchronous wind power generator system. It presents the system model theory and the operation control strategy under all the detailed information, such as reference direction of variables. Then a simulation for the normal operation of PMSG system is carried out in PSCAD with the desired results obtained.
Doubly-Fed Induction Generators (DFIG) are commonly utilized in wind farms nowadays due to their advantages as compared with single-fed ones. Control complexities and their unique characteristics may, however, raise different problems during abnormal or faulty operating conditions. In this paper, an integrated simulation for DFIGs in wind farms is presented for protection application purposes in particular...
A back-to-back PWM converter is used as the excitation power supply for the doubly-fed induction generator (DFIG) wind power generation of variable speed constant frequency (VSCF). The mathematical model and control strategy of converter which is connected between rotor and grid is analyzed. Grid-side converter adopts grid voltage oriented control scheme for achieving the stability of DC-link voltage,...
It is expected that increasing amounts of new generation technologies will be connected to electrical power systems in the near future. Most of these technologies are of considerably smaller scale than conventional synchronous generators and are therefore connected to distribution grids, as the DFIG-based wind farm. When connected in small amounts, the impact of wind farm on power system transient...
Demand for wind power has increased considerably due to technological advances and favorable government policies. As a result, large wind farms with multi-megawatt capacity are connected to sub-transmission and transmission systems. With high penetrations of wind energy, performance of the overall system is affected by the technical impacts introduced by wind turbine generators (WTG). Fault current...
A detailed dynamic model of wind driven doubly fed induction generator system has been developed. The various converter controls have been identified and their order in enhancing the dynamic performance has been established through Hankel singularity value indices and also residue evaluations. Damping controller structure and most effective input to the controller have been determined using the controllability...
With rapid development of wind power generation, the large capacity wind farms are built up and integrated into transmission network. The effect of wind farms on the grid becomes more serious and more extensive. In order to investigate the dynamic performances of the grid-connected wind farm and the interaction of the wind farms, it is necessary to present the appropriate models of wind farms, which...
This paper focuses on the implementation of the TS (Tagaki-Sugino) fuzzy controller for the active power and the DC capacitor voltage control of the doubly fed induction generator (DFIG) based wind generator. DFIG system is represented by a third-order model where electromagnetic transients of the stator are neglected. The effectiveness of the TS-fuzzy controller on the rotor speed oscillations and...
Wind energy is gaining the most interest among a variety of renewable energy resources, but the disadvantage is that wind power generation is intermittent, depending on weather conditions. Energy storage is necessary to get a smooth output from a wind turbine. This paper presents a new integrated power generation and energy storage system for doubly-fed induction generator based wind turbine systems...
Switched reluctance generator is a new technology to convert the wind energy into electrical power, The concept behind the excitations for the switched reluctance generator will be discussed in this paper with simulation assistance using Ansoft and Multisim software, tested results for the proposed method will be discussed in this paper.
Doubly-fed induction generator (DFIG), as a wind generator, is economically justified, but control of the machine is difficult. In addition, it is significantly difficult to assure continuous operation of the DFIG during and after line-voltage distortions, as required by grid code. Nowadays, there is no single used method; the problem is not entirely solved. In the paper, not only features of the...
The synchronous reference frame is widely used in DFIG modeling. It is usually assumed that slip control is in place at the rotor-side converters to make sure that the injected rotor voltage at slip frequency gives a nominal stator frequency (60 Hz or 50 Hz). In the analysis, the injected rotor voltages are directly expressed in the synchronous reference frame. In the cases where slip control is not...
Doubly fed induction generators used in grid interfaced wind energy systems are increasingly being called upon to address voltage regulation and provide adequate reactive power support. This paper presents a new coordinated control strategy using both the grid and rotor side converters for voltage regulation and reactive power support considering operational limits and network side voltage fluctuations...
Today, technology allows energy production in large quantities using renewable energies (sun, wind, water ...). Our previous work introduced a method able to detect, localize and identify sensor failures of the doubly-fed induction generator of a wind turbine. This paper concerns the influence of model parameters on the diagnosis procedure. It shows that parameter identification is required to validate...
Basic in the districts where solar energy and wind energy are naturally complementary, the application of wind-solar hybrid energy systems can reduce the storage capacity of batteries and the total cost of the system compared with stand alone PV or wind generation system. But efficient and reliable operation of wind-solar hybrid generation system largely depends on control strategies of the controller...
Wind energy penetration to the power market has been continuously increasing over the past decades. High penetration level requires the wind energy generation to be more reliable. For wind farms equipped with doubly fed induction generators (DFIGs), a successful low voltage ride-through scheme has been a key issue to achieve reliable and uninterrupted wind energy generation. This paper proposes a...
This paper presents the models of a five-phase interior permanent magnet machine (IPM) feeding a rectifier resistive load. The model predicts the performance of a machine with a non-integer number of stator slots per pole. Using the stationary and rotor reference frames, the approximate diode switching functions are derived. Then harmonic balance technique is used to obtain the steady state average...
The synthesis of the mathematics model is done using three S-functions based on state equation, thus simplifying and accelerating the implementation of DFIG. The VSCF DFIG wind power generation is transient response proceeding, which is influenced by operation characteristics of generator before and after grid connection. A complete simulation model of VSCF DFIG wind power generation based on Matlab...
This paper first studied a kind of vector control strategies based on the stator flux-oriented vector of the double-fed AC excited generator in the case of power grid voltage stable, establishes the simulation model based on Matlab/Simulink and simulation results are given. The results indicate that the stator flux-oriented vector control can achieve the regulation of active and reactive power for...
Back to back full-size PWM converter is widely used in direct drive wind power system (DDWPS). It is the most cost-effective converter topology verified in field application. The characteristics of back to back full-size converter of DDWPS based on permanent magnetic synchronous generator (PMSG) are researched on in detail through a precise simulation and an experiment. The control strategy is given...
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