含风能和电动汽车的互联电力系统容错负荷频率控制

Fault-tolerant Load Frequency Control for Interconnected Power Systems Including Wind Energy and Electric Vehicles

基于容错负荷频率控制方法,研究了互联电力系统执行器故障下系统的稳定性问题。首先,根据风力发电机和电动汽车的动力学特性,建立了含风力发电机和电动汽车的互联电力系统模型。然后,利用改进的滑模观测器对电力系统状态向量和故障向量进行估计。接着,基于估计结果,提出容错控制来保证系统发生执行器故障时的稳定性,并利用李雅普诺夫泛函理论,得到互联电力系统的稳定性准则。最后,通过仿真实例对考虑风力发电机和电动汽车的三区域电力系统进行验证,结果证明了所提出的容错控制方案的正确性和可行性。

Based on the fault-tolerant load frequency control method,the stability of the interconnected power system under actuator faults is studied.Firstly,according to the dynamic characteristics of wind turbines and electric vehicles,an interconnected power system model including wind turbines and electric vehicles is established.Secondly,the improved sliding mode observer is used to estimate the power system state vector and fault vector.Then,based on the estimation results,a fault-tolerant control is proposed to ensure the stability of the system when the actuator fails.And using Lyapunov functional theory,the stability criterion of interconnected power system is obtained.Finally,a three-region power system considering wind turbines and electric vehicles is verified by a simulation example,and the results prove the correctness and feasibility of the proposed fault-tolerant control scheme.