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The problem of the wind turbine gearbox fault diagnosis was investigated by employing the support vector machine (SVM), which is optimized by the improved fruit fly intelligent algorithm with decreasing steps. First of all, the fault characteristic value extracted by Hilbert transform envelope is presented. Secondly, the general SVM solution to the wind turbine gearbox fault diagnosis problem is presented,...
Output power determination of wind generators is always associated with some uncertainties due to wind speed and other weather parameters alteration, and precise short-term predictions are essential for their efficient operation. This can efficiently support transmission and distribution system operators and schedulers to improve the power network control and management. In this paper, we propose...
Power generation from wind generators is always associated with some intermittency due to wind speed and other weather parameters variation, and accurate short-term forecasts are essential for their efficient and effective operation. This can well support transmission and distribution system operators and schedulers to enhance the power network control and management in the smart grid context. This...
Assessment of the output power of wind generators is always associated with some uncertainties due to wind speed and other weather parameters alteration, and precise short-term forecasts are essential for their efficient operation. This can efficiently support transmission and distribution system operators and schedulers to improve the power network control and management. In this paper, we propose...
The planning of distribution network is faced with a great challenge when large-scale renewable energy mostly wind power entering into power system. This paper proposes a bi-level programming model considering distributed wind generation (DWG) allocation in the active distribution network environment which introduces active management fee (AMF) concept firstly. The bi-level programming is a complex...
In recent years, wind power which is an intermittent and random energy source affects the frequency stability of automatic generation control (AGC) system with the large-scale wind power integration. So, it is necessary to improve the conventional frequency control method and model. Firstly, a dynamic wind farm model is set up based on wind turbines clustering for the accuracy of data in this paper...
With the rapid development of wind power generation, it is significant to study the impacts of wind farms on power system reliability. A general probabilistic model of a wind farm is proposed in this paper. The wind farm is modeled as a conventional unit with multiple states. The model could be used in conventional power system adequacy assessment utilizing analytical or simulation methods without...
In order to improve the Grid-Connection of the wind turbine and the voltage stability of the power system, the study the reactive power characteristics (R.P.C) of the double-fed variable speed constant frequency wind turbine is vital. This paper adopts the equivalent circuit of the doubly fed induction generator (DFIG) to derive the equation of the reactive power balance. Based on the equivalent circuit,...
This paper provides a good overview of the status and future development of China wind power industry. The paper describes development and planning of wind power in China, including medium and long-term development and planning goals, characteristics of wind power in China, government rules and regulations, tariffs and tax issues. Specific numbers are given with regards to nationwide installed wind...
Large scale wind farms connected at the end of power grid will probably greatly impact the power grid. The analysis of maximum power injection of wind farm is important issue in the planning and operation of wind farm. Under the static security constraints and transient stability constraints, this paper presents a particle swarm optimization for determining wind power penetration limit in power system...
Incorporating exact feedback linearization with sliding mode variable structure control strategy, a new control scheme of grid-side PWM converters in wind power generation systems is proposed in this paper. An affine nonlinear model of three phase voltage source PWM converter in the rotating frame d-q is obtained. The active and reactive power of the converter is decoupled using exact feedback linearization...
The IEC 61400-25 standard has defined mapping of power plant information model to Web services. How to ensure the security of Web services-based communication for wind power plants is a unsolved problem. WS-Security is a standard used to deal with the security requirement in application of Web services, while username/password and X.509 certificates are security tokens most commonly used in electric...
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