Modification according to syndrome differentiation: For disturbance of wind-fire type, add LR2 (XingJian), LR3 (TaiChong), LR14 (QiMen); For phlegm-stasis blocking collaterals, add SP10 (XueHai), ST40 (FengLong); For yin deficiency and wind act, add SP6 (SanYinJiao), KI3 (TaiXi), LR3 (TaiChong); For qi deficiency and blood stasis type, add CV6 (QiHai), CV4 (GuanYuan), BL17 (GeShu).
In this paper, in respect to the frequency instability problem caused by disturbances of wind power, we propose an extended partial observer based load frequency control (LFC) scheme.
Simulations showed that the dynamic responses of the aggregated model were very close to those of the detailed model under the disturbances of wind speed change and grid fault and the computational complexity was reduced significantly, but the impact factors were not discussed.
Wind power fluctuation and uncertainty determine power flow and operation point in the power system, while the grid disturbance characteristics of wind turbines impose power flow constraints and stability margins on the power system, both of which will impact limits of penetration levels.
Besides, if the power output of the WF changes abruptly due to the disturbance of gusty wind, the WF should not be adjusted if possible.
Assuming that WF1 and WF2 output rated power is stable prior to 3.0 s, a wind gust with a peak velocity of −2 m/s and duration of 2 s is applied to WF1 at 3.0 s. Figure 6 (right column) shows the simulation results of the system under the disturbance of the wind gust.
A possible trigger may be transported by a fast compression front from the dayside magnetopause via the magnetosphere or by a disturbance of the solar wind flow around the magnetopause.
For example, disturbance of forest by wind and fire has enduring influences on regional carbon stocks and fluxes (e.g. Bradford et al. (2008), Coomes et al. (2012), Holdaway et al. (2014)) and appear to be increasing in response to changing climate.
State-space control is carried out to consider the coupled wind turbine dynamics and the disturbance accommodating control (DAC) is used to cancel the effect of wind disturbances in the dynamics of the overall system.
Two levels of wind disturbance intensity were assigned and areas determined to have been converted to agriculture or settlement were assumed to experience one uniform intensity of disturbance.
