جستجوی مقالات مرتبط با کلیدواژه "انرژی بادی" در نشریات گروه "برق"

In this paper, a novel structure of a axial flux switching machines for use in wind speed turbines at low speeds has been proposed, which in addition to the previous advantages, has a simple and economical design for the production of this type of machines. In this proposed machine, the magnets are placed on the surface of stator, and the three-phase winding is located in the space between the magnets. After designing according to the criteria like increasing electromotive force, reducing the cogging torque and reducing the total harmonic distortion, using the design of experiments and the surface response method combined with the finite element software, the appropriate dimensions are selected and the machine is optimized. To test the design accuracy, a prototype model is also made.

Recently, the penetration of intermittent power sources has increased in power systems due to the international drive for clean and sustainable energy sources; but these alternative energies could encounter the power systems with some problems which should be planned and prevented. In this paper, based on project management consideration, a novel scenario-basis multi-objective planning method for large wind farm development plans is proposed in order to optimally minimize the wind farms’ Levelized Cost of Energy (LCOE) and total cost of power flow while maintaining the desired security margin of the grid in any state of operation. The studies are conducted on actual power system of Iran’s southeast grid using MATPOWER software and the obtained results show the effectiveness of the proposed method.

In this paper, a novel framework is proposed to solve wind power investment in incomplete electricity markets in the presence of strategic companies and considering elastic demand. In the proposed framework, the main objective is to investigate the profitability of wind units in oligopolistic power markets where consumers has good elasticity versus electricity price. The considered investment problem is represented as a bilevel model where investment decisions are taken at upper level with the aim of maximizing investment profit, and market clearing problem in the lower level. According to oligopolistic feature of market, Cournot game is applied for modeling strategic interactions among market players. Thus, market equilibrium is determined by maximizing generation companies’ (GENCOs) profit considering balance of supply and demand. Uncertainty of wind power production is modeled with a set of scenarios. Upper problem are solved using genetic algorithm, while the lower level problem is solved by mathematical algorithm for various scenarios of wind power. The proposed model is examined on a three-bus network and on IEEE 30 bus network.

In this paper, electric power production using airborne systems (kites) has been investigated. In the first step, an appropriate model is extracted to describe the behavior of airborne systems. Based on this model, a new path planning algorithm is proposed for the airborne system in the traction phase. Then, in order to achieve the proper operation, tracking the desired path and thus extracting optimal wind energy, a robust controller based on the sliding mode approach is designed in the presence of variations in atmospheric parameters and uncertainties in the system model. In the proposed method, the control strategy is obtained based on the speed vector angle of the airborne. In the proposed approach, six target points are used for the path designing of the kite motion in the traction phase, which increases the precision and flexibility of the designed path. Furthermore, the effect of adjusting the shape of the flight path of the airborne system during the traction phase on the system performance and extraction of the maximum wind force is also investigated