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Wind power generation system based on four-port electromechanical converter (FPEC) is a new wind power system, which overcomes the shortcomings of many traditional wind power generation systems. According to its working mode and operating characteristics, this paper proposes an improved system control strategy as well as the concrete realization method based on fuzzy logic, which improves the energy...
This paper discusses a high-efficiency synchronous generator using high-temperature superconductor (HTS) excitation. A novel design is proposed in which no excitation exists on the rotor. Instead, the stator is excited using DC HTS cables. The design is analyzed with finite element method and is further compared with a permanent magnet (PM) machine with similar machine dimensions. It was shown that...
In the research and development of wind turbine generator systems, it is necessary to predict the responses of the system for various wind conditions. Hence, a laboratory-size wind turbine simulator that can simulate the dynamic performances of actual wind turbine generator systems is very useful. However, there are few studies on such simulators. In this paper, a simulation method for actual MW class...
The objective of the proposed scheme is to extract the maximum power at different wind turbine speed. In order to achieve this, MPPT controller is implemented on the rectifier side for the extraction of maximum power. On the inverter side normal closed loop PWM control is carried out. MPPT controller is implemented using fuzzy logic control technique. The fuzzy controller's role here is to track the...
The main objective of this research is to optimize the diffuser design of Diffuser Augmented Wind Turbine (DAWT). Specifically, this study investigates the effect of different shapes of diffusers to develop the suitable diffuser parameter for the wind turbine power enhancement. For that purpose, two diffuser cases have been recommended as an effective design in increasing wind speed, using a validated...
Wind power generation and Solar PV installations continues to grow and are the two key contributors to the large scale variable power generation mix. Utility transmission system operators impose stringent grid codes internationally. Grid code regulations are defined by system operators to outline the rights and responsibilities of all the generators and loads that are connected to the transmission/distribution...
This paper aims to design a Double Rotor Multi-Tooth Flux-Switching Generator (DR-FSG) with DC excitation suitable for wind power generation. The proposed design has one stator, two mechanically coupled rotors, and two armature winding groups. Each armature winding group is connected with a bridge rectifier. The outputs from the rectifier circuits are connected in series. The performance of the machine...
Icreasing demands of electricity, to reduce reliance on fossil fuels, reduction in greenhouse gases, increasing oil prices and climate changes are the main factors which motivate utilization of renewable energy technologies in the world. Wind Energy has made a significant progress over the last two decades and evolved as one of the mature and fastest growing renewable energy technology due to its...
This article deals with the modeling and control by sliding mode of active power and reactive power stator of an doubly fed induction machine (DFIM), which constitutes the generator part of a variable speed wind turbine. The goal is to apply this command to control independently of active and reactive power generated by the induction machine decoupled flow direction.
As a result of increasing energy demand, effective generation-with high efficiency and low generation costs-of energy is very important. Today, power suppliers are looking for options that might increase the efficiency of the existing systems rather than installing new power stations or adding extra capacity. Maximum utilization of power sources can be achieved with the selection of the most appropriate...
The trend of enlargement of wind turbine requires tall tower for supporting it. An internally confined hollow reinforced concrete (ICH RC) wind tower was suggested, and it could be an answer to solve the problem such as buckling failure that a steel tower has. The section of the tower supporting 5MW wind turbine was designed and analyzed to confirm its safety. Based on the literature review, load...
As wind power becomes a high penetration in power system, wind turbine integration performance plays a significant role in power grid operation. Wind turbine controller strategy and its coordination with pitch system, generator, convertor, etc., are key of wind turbine performance. This paper presents the work of hardware-in-the-loop (HIL) wind turbine simulative platform which is dedicated for wind...
Wind power does not pollute and is recyclable. The speed of the blades of a wind turbine speeds considerably affect the measured output power of the turbine. The speed of the tip of the blade must be set to maximize power output. The speed of the blade also significantly affects energy losses and the power coefficients. The former should be minimized and the latter maximized. Various loads on a turbine...
With the increasing share of wind in power generation, the dynamic behavior of the power system will change considerably due to different technologies used for wind and conventional generators. This paper will describe the sustainability of Doubly-Fed Induction Generator during the abnormal condition on grid also during the fault condition. For the selection of the suitable ratings of crowbar (chopper...
The economic analysis of photovoltaic solutions takes more and more importance, it is essential to take investment decisions in full knowledge of the facts to be able to quantify the profitability of photovoltaic electricity. The objective of our study was to present the performances of a solar wind pumping system with battery storage installed in the site of Bejaia, and evaluate the cost of a cubic...
One of the problems encountered when a wind farm is radially connected to a series compensated transmission line is subsynchronous resonance (SSR). The aim of this paper is to investigate the risk of SSR condition in Doubly-Fed Induction Generator (DFIG) based wind farms that are radially connected to series compensated transmission lines. The IEEE First Benchmark Model (IEEE FBM) is adopted and the...
In this paper sub-synchronous control interactions (SSCI) in doubly-fed induction generator (DFIG) based wind farms are studied. The SSCI problem has come into prominence since the Electric Reliability Council of Texas (ERCOT) event of 2009, where a faulted line and subsequent outage in the network caused a large DFIG wind farm to become radially connected to the series compensation network, resulting...
This paper proposes a novel rotor position estimation algorithm for the vector control of the doubly-fed induction generators (DFIGs) in wind power applications. The proposed algorithm uses a sliding mode observer (SMO) to estimate the rotor position information from the stator currents. The estimated rotor position is then used for the position sensorless vector control of the DFIG. The proposed...
This paper presents low speed test in two-axis actively positioned bearingless machines with non-collocated structure for wind power applications. Bearingless machines have been required in wind power applications to eliminate bearing failures. In the two-axis actively positioned bearingless machine, radial directions are actively positioned. Normally, tilting and axial motions are passively stabilized...
In this paper, an electrical generation system with variable speed and constant frequency (VSCF) to supply isolated loads is presented. This system is composed of a doubly fed induction generator (DFIG), providing energy to an autonomous grid. It is driven in the rotor by a static converter with operation in hypo and hyper synchronism. A permanent magnet synchronous machine (PMSM) connected to a wind...
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