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To solve the voltage problems in the area of wind farms, this paper designs a coordinated control system of the wind farms. A coordinated voltage control strategy using the sensitivity method is presented in the paper. The coordinated control is divided into two hierarchies in this strategy. In the primary control, each wind farm regulates the POI (point of interconnection) of wind farm at the voltage...
In this paper, we introduce a new method for finding the proper size of energy storage system (ESS). This design is dedicated to reduce the size of ESS considering the uncertainty of wind speed. It considers the statistical behavior and also the state of charge (SOC) of ESS. The impact of wind uncertainty on power production and its impact on the SOC of ESS are studied. The optimization is done by...
Existing active power control methods mostly take one wind farm as unit and regulate its active power independently, which cannot effectively satisfy comprehensive active power control demands of large-scale wind power base. Therefore, this paper proposes an active power coordination control strategy for wind farm cluster (WFC). The corresponding control system is divided into four levels — wind energy...
With the steadily increasing penetration of wind power into the grid, wind power is likely to displace the output of some thermal units and this can result in a reduction in fuel consumption and harmful emissions. On the other hand, due to the volatility of wind power, it brings great influences to power system frequency-regulating. Then, considering of the demand of system frequency-regulating, this...
In this paper, a method based on voltage stability is proposed to determine the maximum sizes of multiple new wind farms on a certain probability. Based on the Weibull probability density function, the formulation of the relation between the maximum sizes of wind farms and the allowable output of wind farms on a certain probability has been given. Afterwards, the iteration strategy was given, when...
This paper proposes an optimized dispatch strategy for active power cutback control in a wind farm. The strategy is considered as the supplement of the control strategy of the active power control system for wind farm clusters. Based on the priority list method, the control strategy is designed to realize the dynamic control sequence of wind turbines considering regulation capacity, regulation speed...
With the rapid increasing of the installed capacity of wind power, the difficulty of system frequency regulation is more apparent than ever for the volatility and randomicity of wind power. Therefore, this paper proposes one strategy of wind farm power regulation considering system frequency regulation demand. The corresponding control system is divided into three levels–wind energy management level,...
More and more wind and solar generations are integrated into power grid, especially wind generators, which will bring challenges to the conventional stability control system. The corresponding measures including FACTS, LVRT, Energy Storage and Power Prediction technologies are discussed to deal with those challenges. The application of these technologies can improve the controllability of wind power,...
Wind energy is one kind of purity, non-polluting, renewable new energy. Real-time monitoring wind power generation system is an important action bearing with steady operation of system and high efficiency exploiting wind power resources. A novel intelligent monitoring system plan for wind power generation based on wireless sensor networks is proposed in this paper, which employs many high technologies...
With rapid development of wind power generation, the large capacity wind farms are built up and integrated into transmission network. The effect of wind farms on the grid becomes more serious and more extensive. In order to investigate the dynamic performances of the grid-connected wind farm and the interaction of the wind farms, it is necessary to present the appropriate models of wind farms, which...
The paper deals with the impact of wind power integration on power system small signal stability. The DFIG wind turbine consisting of a back-to-back PWM converter is introduced. Generator model is given first, ignoring the transient of stator. The converter control, shaft and pitch angle control diagrams are picked out for a detailed study subsequently. A case study is performed in part three, eigen-analysis...
With rapid development of wind power generation, it's necessary to study the dynamic characteristics of wind power generators when a fault occurs in the grid to assure the security and stable operation of the wind farm. At present, the widely used wind power generators in the whole world are squirrel cage induction generator (SCIG) and doubly fed induction generator (DFIG). In the paper, the model...
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