The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
One of the problems related to isolated microgrids with battery storage systems (BSS) and small wind turbines is related to power balance among generation, BSS, and loads, especially when the generation is higher than the consumption and the BSS is charged. This paper presents the development of a wind-powered battery charging system for isolated microgrids. The system implements Maximum Power Point...
With the increasing penetration of wind power, reliable and cost-effective wind energy production are of more and more importance. As one of the promising configurations, the doubly-fed induction generator based partial-scale wind power converter is still dominating in the existing wind farms, and its reliability assessment is studied considering the annual wind profile. According to an electro-thermal...
This paper presents a study on a doubly fed induction generator (DFIG)-based wind energy conversion system (WECS), emphasizing to the grid connection and protection needs. Today, due to the high wind power penetration into the grid, a protection system mounted on the WECS is definitely essential in order to achieve a better performance during dynamic states. In this study, two types of fault were...
In this paper, reluctance synchronous machines are designed and optimised to operate in the 5 MW power range for the implementation as wind generators. It is shown, when assuming no rotor deformation, that reluctance synchronous generators can be comparatively designed to operate in this power range with power factors higher than 0.8 achieved. In order to further improve the machine performance, an...
This paper proposes a improved hill climbing searching (HCS) maximum power point tracking (MPPT) control strategy for the dual power flow (DPF) wind energy conversion system (WECS) which is based on the electrical variable transmission (EVT). The proposed improved HCS MPPT strategy is developed based on the electrical power which is generated by the stator. The peak detection capability has been devised...
Electrical resonance with the grid is an increasingly common problem for wind turbines and PV inverters, especially those connected to a weak grid. Such resonance problems can usually be solved by modifying turbine or PV inverter control to reshape its output impedance. There are, however, situations where this may not be effective or not feasible at all due to e.g. limitations in turbine design or...
This paper proposes a novel field excitation scheme employing 4-leg converter in Machine-side Converter (MSC) of Wound Rotor Synchronous Generator (WRSG) wind turbines. The conventional thyristor rectifier and brush/slip-ring contact for supplying the field excitation is replaced by the rotating transformer and diode rectifier in the field winding side. 4th-leg power converter of MSC provides ac voltage...
This paper introduces a new configuration of wind turbine drivetrain that collects energy from two interconnected wind turbines. Hydrostatic transmission is utilized to collect the energy and transfer it to a ground-level generator. A mathematical model of the system is obtained and utilized in the control of generator speed and tracking of the maximum power point. Variable displacement pumps and...
This paper presents a medium voltage power conversion architecture for grid integration of multi-MW permanent magnet synchronous generator (PMSG) based wind energyc-conversion system (WECS). Converting the low voltage power output of the generator to medium voltage, can reduce the diameter of the power cable significantly. As a result, power loss and the overall cost of the system can be minimized...
To help mitigate some of the challenges associated with the wide spread adoption of the stochastic wind power, wind turbine with full-scale power converter (Type D) is preferred. Since full power is processed by the power converter in a type D wind turbine, it is important to improve its efficiency and reduce the cost per kW to achieve lower cost of energy. The power produced by the wind turbine varies...
Sparse representation of massive condition monitoring signals is an effective approach to save the cost for data storage and transmission in fault diagnosis of wind turbines. This paper explores a sparse representation method over a new dictionary designed particularly for bearing vibration signals of wind turbines operating under varying-speed conditions. First, the time-varying shaft rotating frequency...
In this study slip permanent magnet couplers (slip-PMC) for wind turbine application are introduced and their analysis technique used in finite element method (FEM) is presented. Two optimization methods are employed in determining optimum permanent magnet (PM) rotors for a fixed wound rotor size. The machine topologies, namely surface-mounted and spoke-mounted PM rotor topologies are evaluated against...
This paper proposes an innovative design for the enablement of smart irrigation networks. The proposed design is a self-sustaining system that relies on harnessing hydrokinetic power at a suitable scale from slow moving water bodies. Our proposed design, Hydrokinetic powered Irrigation Network Automation (HINA), serves as a building block for network expansion and integration. HINA is a novel design...
This paper studies a real-case grounding system design for a wind farm and associated equipment. The design is based on the safety criteria provided by Australian and International guidelines listed in the references [1-5]. The wind farm grounding system consists of wind turbine generators, tower base padmounts, 33 kV cable screen and a primary substation. In this paper, grounding system and ground...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.