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This paper proposes a control methodology for Superconducting Magnetic Energy Storage (SMES) unit, which can significantly decrease the voltage and power fluctuations of grid connected fixed speed wind generators. The SMES system with a voltage-source IGBT converter and two-quadrant DC-DC chopper using IGBT is proposed as a controllable energy storage device. The objective of the proposed SMES control...
A wind farm usually consists of a large number of wind turbine generators (WTGs) connected through an internal electrical network and operating simultaneously. In order to study the impact of a wind farm on the dynamics of the power system, a major issue is to develop adequate equivalent models that allow characterizing the dynamics of all individual WTGs. In this sense, with the advance of power...
With the development of wind power, the inherent characteristics of randomness and uncertainty of wind energy would have an impressive effect on power system frequency, it is necessary for wind farm to participate in frequency regulating in order to share the burden with the frequency-regulating power plants, and to improve power system stability. Two operation modes of the wind farm are proposed...
This paper studies the voltage stability problems of wind farm access to electric grid. Based on the equivalent circuit of asynchronous machine, it deduces the relationship of wind turbine angular velocity rotation with the induction generator terminal voltage. Aiming at wind power for 10 kV distribution grid, a novel SVC is proposed to replace the fixed capacitors compensating devices. The reactive...
With more wind power integrated into power grid, its impact on voltage is larger so that the command that wind farm should support voltage and reactive power in wind power integrated region is required by system. Based on this, a reactive power compensation control method is proposed considering voltage and reactive power command in integrated region. The voltage of point of interconnection (POI)...
In this paper, we propose a decentralized control strategy to dispatch and control the output power for wind farm. In this strategy, the power control system is supposed to operate as a virtual market place. Every wind generator is treated as a buyer agent or a seller agent. The buyer and seller agents cooperate and compete to process transactions for setting value of power. The market place manager...
In this paper, we analyse the effects of the integration of various types of wind generators into power systems based on available (dynamic) transfer capability (ATC). The amount of static (shunt capacitor) and dynamic compensations (STATCOM) to restore1 and enhance the transfer capability for fixed speed wind generators integration is determined. In addition, we compare the effects of both fixed...
The paper mainly analyzes the Nordex N43/600 wind power system based on an investigation of wind farm. Wind turbine's structure and parameters are introduced. It also introduces the electric control system through the following aspects: The eletricity circuit, the grade of voltage, the parameters which are measured or controled, the main controller and the soft connection control module. Finally it...
In order to research the wind power technology in the environment far away wind farm, this paper proposed a design and realization wind power generation simulating and experimental system based on ARM and DSP. It includes wind speed simulating system, wind turbine simulating system, power generation system, monitoring system and controller. In the system, simulates actual wind using statistical model...
Currently, there are several published reports on wind power detailing various researches based on such subjects as pitch angle control, variable speed wind turbines, energy storage systems, and so on. These reports propose output power leveling to reduce the adverse effects of power system frequency deviation. In this context, it is desirable to decrease frequency deviations of power systems by output...
Many isolated small power systems are powered by diesel generators, which results in greater operating costs than interconnected large grids. It is therefore desirable to integrate renewable energy sources such as wind power into these small grids. However, due to the fluctuating power generation from renewable energy sources, frequency deviations of power systems become problematic. Distributed intelligent...
This paper, presents a pitch controlled Wind Turbine Generation System (WTGS) which is used in practice now a days, to have optimum power flow and to reduce overloading of wind turbine when higher wind speeds are available. Also, a pitch control system is used for stabilization of the wind turbine at grid faults. Application of Static Synchronous Compensator (STATCOM) and static capacitor bank is...
As wind turbine output is proportional to the cubic of wind speed, the wind turbine generator output fluctuates due to wind speed variations. Hence, if the power capacity of wind power generators becomes large, wind power generator output can have an influence on the power system frequency. Some methods for smoothing the wind generator output fluctuations using several types of energy storage systems...
A strategy for controlling wind farms composed of variable-speed machines is considered in this paper. It is shown that mechanical efforts produced by wind gusts on individual machines can be reduced by means of a supplementary control signal coming from a centralized controller. This is done while the total wind farm power output is kept at the same value as in the absence of the proposed controller.
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