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In recent years, environmental problems are becoming serious and renewable energy systems, especially wind power generation, have attracted much attention and been introduced into power systems. However, wind power generator output is intermittent, resulting frequency fluctuations in the connected power system. A doubly fed induction generator (DFIG) based diesel generation system is proposed in this...
Many islands in China are far from the mainland and electricity is difficult to cover or the cost is high, due to this issue, the wind energy, wave energy and solar energy can be used to meet the demand of island power supply. However, the energy density of these renewable energy sources is low and the stability is poor, which may cause power supply instability. To deal with this issue, a multi-energy...
The evaporative cooling system for wind power generator inclines at an angle of 3∼5 degrees. Due to the special structure, it forms a liquid-gas two-phase self-circulation. Two-phase flow self-circulating system is a typical nonlinear dynamic system. So it is important to study the nonlinear characteristics. In this paper, the nonlinear characteristics were studied through theoretical analysis and...
A teaching example is built in Simulink, and then, based on the communication between Matlab and LabVIEW, a teaching virtual platform in LabVIEW is realized. This platform is about a wind power generation system and used mainly for the Renewable Energy Sources course of the undergraduate students of electrical engineering major. Compared with Simulink simulation teaching, the virtual platform adopts...
Brushless doubly-fed generator (BDFG) has a good application prospect on the wind power generation field. In order to improve the power density, a new type of dual-stator brushless doubly-fed generator (BDFG) with magnetic-barrier rotor is presented in this paper. The overall structure design method and mechanical performance of DSBDFG is put forward and analyzed. In this paper, the stress analysis...
After years of rapid development, wind energy has become one of the three major energy sources in China. Due to the rapid development of wind power industry, wind energy has become one of the most important energy sources in the world, the demand for wind turbines is also growing. Therefore, investigations of the wind turbines are particularly important. Dual-stator brushless doubly-fed generator...
A Linear Rotary Permanent Magnet Generator(LRPMG) is proposed for wind-wave combined power generation system(WWCPGS). The rotary unit and linear unit of the LRPMG can be used to generate electricity by wind energy and wave energy, respectively. Compared with rotary generator by single wind power and linear generator by single wave power, the LRPMG can improve the utilization rate of the material and...
The stochastic nature of wind power generators and their possible outage are crucial issues which make them difficult to participate in electricity markets. However, demand side as a decent balancing resource can be used to compensate the challenges of lack of supply-demand balance or state of outage for wind generators. This paper firstly models the outage of wind generators. Then an offering strategy...
This paper investigated into a comparative study of modified swarm intelligence based algorithms for solving multi-objective optimal power flow incorporating wind power and load uncertainties to improve its efficiency and optimize power system generation. The proposed method has been tested under a number of modified IEEE test systems. The results show that solving the multi-objective optimal power...
The eddy current loss of permanent magnet will result in the increase of permanent magnet temperature and the change of the magnetic properties, the efficiency of the generator will be reduced and the performance will become poor. In this paper, the permanent magnet eddy current loss of the finite element model of two degree of freedom permanent magnet synchronous generator is calculated and analyzed...
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