Energy storage device, system and method for smoothing output power fluctuations of wind turbines
A technology for wind turbines and output power, applied in the field of energy storage devices for smoothing output power fluctuations of wind turbines, can solve problems such as affecting the quality of output power of a power grid, and achieve the effects of smoothing the impact and improving stability
Active Publication Date: 2015-09-16
SINOVEL WIND GRP
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Problems solved by technology
[0003] Wind energy, as an intermittent energy source, has great randomness and uncontrollability, and the electric energy generated by wind turbines also has large fluctuations. For high-power wind turbines, when the electric energy During the process of the power grid, it will have a great impact on the stable operation of the power grid and affect the quality of the output power of the power grid. The fluctuation is directly applied to the power grid, and the impact on the power grid is more obvious. In order to improve the stability of the power grid operation, it is necessary to develop a method to stabilize the output power fluctuation of the wind turbine
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[0029] An embodiment of the present invention provides an energy storage device for smoothing output power fluctuations of wind turbines, figure 1 A schematic structural diagram of an energy storage device for smoothing output power fluctuations of wind turbines provided by an embodiment of the present invention, as shown in figure 1 As shown, the energy storage device includes a battery pack 10 , a DC chopper 11 , a capacitor 12 and an inverter 13 .
[0030] A DC chopper 11, whose low-voltage side is connected to the battery pack 10, and whose high-voltage side is connected to the capacitor 12, is used to convert the output voltage of the battery pack 10 into the charging voltage of the capacitor 12, so that the battery pack 10 discharges to charge the capacitor 12 , and converts the output voltage of the capacitor 12 into the charging voltage of the battery pack 10 to discharge the capacitor 12 to charge the battery pack 10 .
[0031] A DC chopper is usually a circuit compo...
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The invention provides an energy storing device, system and method for stabilizing wind turbine generator output power fluctuations. The energy storing device comprises a storage battery pack, a direct current chopper, a capacitor and an inverter. The low voltage side of the direct current chopper is connected with the storage battery pack, the high voltage side of the direct current chopper is connected with the capacitor, the direct current side of the inverter is connected with the capacitor, and the alternating current side of the inverter is used for being connected with a grid connection point of a wind turbine generator. According to the energy storing device, when the output power of the wind turbine generator has the fluctuations, the output power of the wind turbine generator can be absorbed through the energy storing device, or the power can be output to be connected into a power grid to stabilize influences on the power grid in the process that the output power is connected into the power grid through the wind turbine generator, and the power grid operation stability and the quality of electric energy output by the power grid are improved.
Description
technical field [0001] The invention relates to wind power generation control technology, in particular to an energy storage device, system and method for smoothing output power fluctuations of wind turbines. Background technique [0002] Wind power generation is an energy utilization technology that converts wind energy into electrical energy through wind turbines. It is currently the fastest-growing and most potential "green energy" in the field of new energy development. [0003] Wind energy, as an intermittent energy source, has great randomness and uncontrollability, and the electric energy generated by wind turbines also has large fluctuations. For high-power wind turbines, when the electric energy During the process of the power grid, it will have a great impact on the stable operation of the power grid and affect the quality of the output power of the power grid. Especially for the doubly-fed wind turbine generator set, the stator of the generator in the generator se...
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IPC IPC(8): H02J3/38H02J3/32
CPCY02E10/76Y02E70/30
Inventor 刘先正苏丽营杨明明王兆奎李文剑
Owner SINOVEL WIND GRP