ZHU Maolin,LIU Hao,BI Tianshu.Dynamic State Estimation of Doubly-fed Wind Turbine Based on Observability Analysis and Multi-step Prediction Cubature Kalman Filter[J].Automation of Electric Power Systems,2023,47(3):49-58.
ZHU Maolin,LIU Hao,BI Tianshu.Dynamic State Estimation of Doubly-fed Wind Turbine Based on Observability Analysis and Multi-step Prediction Cubature Kalman Filter[J].Automation of Electric Power Systems,2023,47(3):49-58. DOI: 10.7500/AEPS20211230003.
Dynamic State Estimation of Doubly-fed Wind Turbine Based on Observability Analysis and Multi-step Prediction Cubature Kalman Filter
Accurate dynamic state estimation results are of great significance for monitoring the operating states of doubly-fed wind turbines in real time. Appropriate measurement set selection is the foundation for the realization of accurate state estimation. Therefore
the observability matrix of nonlinear system states is derived based on the Lie derivative
and the fast calculation of the observability matrix is implemented based on the automatic differential technique. The smallest singular value of the observability matrix is used to quantitatively evaluate the observability of different measurement sets. Considering that the prediction step of the Kalman filter does not use the measurement value
a cubature Kalman filter (CKF) method based on adaptive multi-step prediction is proposed. The observability analysis of the doubly-fed wind turbines is carried out by using the modified IEEE 39-bus system
and the measurement set is selected to make the states of doubly-fed wind turbines have high observability. On this basis
the effectiveness of the proposed cubature Kalman filter method based on multi-step prediction is verified.
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