【摘要】 本文提出了一种基于非线性控制算法的双馈感应发电机区域间振荡阻尼控制策略。所研究系统的动态模型是一个经典的包含双馈风电机组的风电场的双区域电力系统模型。首先对相关系统进行建模,然后根据控制目标选择合适的输入和输出变量,将这些变量线性化。根据非线性算法,通过输出函数和状态函数的李导数获得反馈控制律,可以将所选择的系统输入线性化为系统输出。因此,可以设计控制参数来利用线性系统控制算法来改善系统动态响应,所提出的控制策略可以处理阻尼控制回路中存在的非线性,因此可以提高阻尼控制的性能。在Digsilent平台上进行的仿真用于研究所提出的双馈风电机组阻尼控制策略的性能。将仿真结果与没有附加阻尼控制器和附加传统的电力系统稳定器(PSS)的系统进行比较。结果表明,该方法可以明显改善系统阻尼。与传统的电力系统稳定器控制相比,所提出的阻尼控制器可以更快地抑制功率波动。更多还原

【Abstract】 In this paper,a nonlinear control algorithm based inter-area oscillation damping control strategy for doubly-fed induction generators is proposed.The dynamic model of the system under study is a classic two-area power system model of a wind farm with doubly-fed wind turbines.The relevant systems are modeled first,and then the appropriate input and output variables are selected according to the control objectives to linearize these variables.According to the nonlinear algorithm,the feedback control law is obtained by the Li derivative of the output function and the state function,and the selected system input can be linearized into the system output.Therefore,the control parameters can be designed to improve the dynamic response of the system by using the linear system control algorithm.The proposed control strategy can deal with the nonlinearity existing in the damping control loop,so the performance of the damping control can be improved.The simulations performed on the Digsilent platform were used to study the performance of the proposed doubly-fed wind turbine damping control strategy.The simulation results were compared to systems without additional damping controllers and additional conventional power system stabilizers(PSS).The results show that the method can significantly improve the system damping.The proposed damping controller can suppress power fluctuations more quickly than conventional power system stabilizer control.更多还原