Wind power generation due to unpredictable winds, making wind turbines the Internet is evolving into oscillation, when the wind power system disturbance frequency close to the inherent oscillation frequency, can cause significant power oscillation, and the oscillation amplitude as the disturbance will be the magnitude of change. Perturbation amplitude not only with the wind generator disturbance, but also with the parameters of the system itself, and therefore could be considered two-pronged approach to reduce disturbance on the power grid forced oscillation. Wind power will not only have forced oscillation system to produce, but also the transient stability of the system have an impact. Of course, this effect is small in wind power installed capacity is negligible, but when once the wind power in the system occupies a relatively large number of shares, this effect can not be ignored, otherwise the grid when a sudden change of wind power, the system There may be too large due to oscillations can not remain stable and transient loss of stability, and there the collapse of large power systems. In short, if and to network with higher share of wind power is rather weak, and the net negative impact is enormous.
Great efforts to develop wind generators as a clean energy has been wind power issue has become increasingly subject to the power of staff concerns. But the wind as an intermittent energy sources, combined with the forecast accuracy of wind energy resources can not be fully in line with the power system to the power quality requirements, to seek new ways and new thinking to resolve the impact of wind turbines on the system naturally becomes the work of a number of the power industry personnel targets. Use of static VAR compensator can quickly compensate for reactive power, wind power generation to maintain a stable power supply voltage of the access point, but can not adjust the active power output of wind farms. The use of battery energy storage system can be a better solution to this problem, and can guarantee the stability of the Internet voltage, but also can compensate for active power, the system will not be adversely affected. May choose from a battery, rectifier devices and inverter device composed of flexible AC transmission system as energy storage system.
