School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China
This work is supported by National Natural Science Foundation of China (No. 51877061).
The dynamic interaction of the synchronous generators (SGs) and doubly-fed induction generators (DFIGs) changes the oscillation damping capability of the systems. The system state matrix is decided by the parameters of the SGs and the DFIGs, adding the difficulty of deriving the sensitivity of the oscillation modes to the control parameters. For the power systems with the DFIGs, to quantify the control effect of reactive power adjustment to damp the oscillation, the analytical expression of the sensitivity of the damping ratio to the reactive output of the SGs is proposed. By introducing the constraint of the minimum damping ratio, the oscillatory stability constrained optimal power flow (OSC-OPF) model based on reactive power optimization is proposed. According to the Lagrange multiplier of the OSC-OPF, the sensitivity of the system loss to the reactive capacity of the SGs under the stability constraint is proposed. The simulation results show that the proposed model helps reduce the power loss and improve the damping capability of the wind power systems.
LI Shenghu,JIANG Yitian.Oscillatory Stability Constrained Optimal Power Flow Algorithm Based on Reactive Power Optimization for DFIG Integrated Power System[J/OL].Automation of Electric Power Systems,http://doi.org/10.7500/AEPS20190912001.