基于廣域預(yù)測(cè)控制的電力系統(tǒng)阻尼控制研究
[Abstract]:Due to the increasing scale and complex structure of power grid in recent years, the problem of low frequency oscillation can not be ignored. The traditional damping control usually selects the local measurement signal as its input signal. Through this control effect, the damping effect of the local oscillation mode is better, but the damping of the lifting inter-region mode is limited. Therefore, the inter-regional oscillation can not achieve a good suppression effect, inter-regional oscillation is still the main problem to be solved. Based on this background, the main contents of this paper are as follows: firstly, the state space model of multi-machine power system is established, and the prediction equation and objective function of the model predictive controller (Model Predictive Controller,MPC based on the system state space model are derived. A new residue matrix method is used to select the feedback signal and installation location of the controller, which lays the foundation for the design of the damping controller. Secondly, a new damping controller design method based on model predictive control is proposed. In order to suppress the interval low frequency oscillation, the controller consists of two stages. The input signal is a wide area measurement signal and a local measurement signal. The residue matrix method is used to select the wide area control loop and the damping control is carried out by pattern identification. The model predictive controller is applied to the wide-area additional damping control, which harmonizes with the local PSS. The optimal control input of the excitation controller is obtained by model prediction and optimization, so as to realize the dynamic coordination between voltage regulation and enhanced damping. Improve the dynamic steady-state performance of the system. Finally, in order to test the control effect of the designed damping controller, the typical four-machine two-zone system and the 10-machine 39-bus system are simulated. The simulation results show that the control effect of the wide area damping controller based on MPC is obviously better than that of the traditional damping control, and the terminal voltage can be adjusted quickly and the damping of the interconnected power network can be significantly improved.
【學(xué)位授予單位】:東北電力大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類(lèi)號(hào)】:TM712
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