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This paper presents a Monte Carlo based probabilistic methodology of evaluating the oscillatory stability margin of power system with large-scale wind generation. The approach considers not only the stochastic characteristics of wind speeds which are treated as random variables with Weibull distributions, while also the wind speed spatial correlations which are modeling by Nataf transformation. A...
Wind farm penetration limit calculation is an important issue in the planning and operation of power system with wind power. Here, the Chance Constrained Programming (CCP) model for the wind power penetration limit calculation is established, stochastic simulation is used to expresses the constraints by means of probability. In order to reduce the difficulty of the problem solving, a method considering...
In aspect of capacity, wind power generation and traditional power generation is inner connected. The capacity credit is a convenient and effective way to compare these two different types of power generation. Capacity credit of wind power (CCOWF) is presented in this paper, as well as a calculation method of CCOWF based on probabilistic production simulation (PPS), this method is based on sequence...
Due to the nature of randomness of wind power, an approach based on multi-state modeling wind power is proposed for power system probabilistic production simulation. The traditional probabilistic production simulation is used to deal with the optimal allocation and calculation problems of the thermal units, and it's not applicable to the system including wind power any more. The comprehensive model...
As the wind power generation technique is improved greatly, permanent magnet synchronous generator (PMSG) is paid more and more attention because of its multiple advantages. Nevertheless, conventional directly-drive PMSG wind generation system is connected to the grid by AC transmission. This paper introduces the DC connection structure of wind farm based on PMSG. According to VSC-HVDC (Voltage Source...
With global environment problems increasing, wind power as a renewable energy is concerned worldwide, many wind farms are designed recently, however, the power output of wind farms is fluctuant which is determined by the intermittent and random of wind speed. With the increase of wind farm capacity and the percentage of wind power in the whole power system, the influence of the power output fluctuation...
Doubly-fed Induction Generator (DFIG) is a kind of variable-speed constant-frequency (VSCF) wind generator (WG) which can output reactive power when not working in the constant power factor mode and be used as a reactive power supply for wind farm. In this paper, an optimal control strategy for reactive power in wind farms consisting of DFIG is proposed by combining the reactive power compensation...
Dynamic economic dispatch (DED) is a high-dimensional, non-convex, multi-constrained optimization problem. With the increase of wind power penetration into power systems, the DED problem becomes more difficult. In the mathematical model, the constraints of wind farm output and spinning reserve are proposed to deal with the random and unpredictable nature of wind power. In the power system with large-scale...
VSC-HVDC is the ideal transmission technology for the connection of the wind farms to the power system. In this paper the topology of VSC-HVDC for connection of wind farm was presented. Control strategy of VSC-HVDC for wind farm using DFIG was proposed. DFIG and VSC-HVDC were modeled in PSCAD/EMTDC software and simulation analysis was carried out. Simulation results were presented to illustrate the...
Wind power forecasting has great significance to the connection of wind farms to the electric power system. This paper analyzes individual forecast models, such as the time series forecasting, Elman network forecasting that based on the chaos theory, grey neural network forecasting, and generalized regression neural network forecasting, etc., then puts forward an entropy weight combination prediction...
Wind power penetration to power systems is increasing rapidly in the recent years due to its environmental benefit, while wind power fluctuation also brings some problems to power system operation which impacts the transmission company's willingness to accept wind power. The most serious conflict influencing wind power development is that the currently adopted price of wind power on-grid does not...
How to compare the wind power generation and traditional power generation in aspect of capacity is essential of power system expansion. The capacity credit is a convenient and effective way to compare these two different types of power generation. Unfortunately, the definition of capacity credit of wind farms is not clear and generally acknowledged. In this paper, a more clear definition of wind farms'...
The integration of a large number of wind farms will have a significant impact on the reliability performance of the electric generation and transmission systems. In this paper, an adequacy evaluation model of wind power integration in power system based on the sequential Monte-Carlo simulation approach is presented. This model is applied to simulate power system including wind power generation. Depth...
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