Inertia Evaluation Method of Power System Based on Variational Mode Decomposition and Quantum Derivative Algorithm
In order to eliminate the influence of inconsistency of frequency change rate on the evaluation of equivalent inertia under pow-er system disturbance and improve the evaluation accuracy of system equivalent inertia,an evaluation method of equivalent inertia level of power system based on variational modal decomposition and quantum derivative optimization algorithm is proposed.The feature ex-traction of the frequency curve is realized by variational modal decomposition,and the inertial time constant of each generator is used as the decision variable,the real quantum coding is carried out for it,and the optimization objective function based on the generator rocking equation is constructed.The hybrid update strategy optimizes the time constant,and then realizes the inertia identification of the power system.Finally,the inertia level evaluation of multiple indicators is carried out.Through the trip event of Hongyanhe No.3 nuclear pow-er unit,the power grid inertia level under the measured data of Liaoning power grid is evaluated and analyzed,and the effectiveness of the proposed method is verified.
power systeminertia evaluationvariational mode decompositionquantum derivative algorithmoscillation equation
万方数据
维普
