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To achieve automatic generation control (AGC), the constant active power control is required for wind turbine generators (WTG). The accurate estimation of available wind power (AWP) is a prerequisite for WTGs to effectively participate in AGC and enhance the performance of AGC. In such a case, the maximum power point tracking (MPPT) control is not adopted and accordingly the MPPT principle cannot...
Considering that the operating angle of attack (AOA) of a blade element on a variable-speed wind turbine (VSWT) cannot be maintained at a single value due to the slow dynamic behavior of the turbine, the multi-AOA based airfoil design is gradually becoming a significant approach to improve the efficiency of energy capture for the blade element. However, a key issue of this method, the selection of...
In this paper, the method of installing fault current limiters (FCLs) near DC converter station is proposed, which is aimed at the commutation failure caused by short circuit fault of the DC inverter side in AC/DC power system. Influence mechanism of FCLs on suppressing commutation failure is analyzed. What's more, effects of FCLs in different locations on commutation failure are compared. In addition,...
In order to pre-validate control strategies of wind energy conversion system (WECS), wind turbine simulators (WTS) are usually adopted to simulate the output characteristic of field wind turbines (WT) in the laboratory. Since the moment inertia of WTS is smaller than that of a practical WT, an inertia emulation scheme has been applied in WTS to replicate the dynamic behavior of real WT. In this paper,...
Based on the analysis of the wind turbine model characteristics, the essence of the maximum wind energy tracking problem of variable speed wind turbines is transformed into controlling the rotor speed to track the optimal rotor speed. The generator torque is used as a control input to force the wind turbine to stay close to the maximum energy point in the below-rated power region. In this paper, a...
With the development of urbanization, the wind resource around the building becomes richer. While the atmosphere passes the buildings, there will be a high wind speed in a particular region. This paper is based on Flunet and standard k - ε turbulence model is used to calculate the wind field around a single rectangle building. This paper shows how the inlet speed and the size of the buildings affect...
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