Robust Emergency Dispatch Method Considering Dynamic Frequency Security and N-k Contingency

Authors

Tao Huang, State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
Zhi Zhang, State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
Yujie Ding, State Grid Qinghai Electric Power Research Institute, Xining 810000, China
Yanbo Chen, State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
Jing Wang, State Grid Qinghai Electric Power Research Institute, Xining 810000, China
Wenqian Zhang, State Grid Qinghai Electric Power Research Institute, Xining 810000, China

Abstract

Abstract: To address the risk of system inertia loss and frequency instability caused by grid integration of high-proportioned new energy and unit failures, an N-k robust emergency dispatch method considering dynamic frequency security constraints was proposed. With the consideration of the frequency response characteristics of variable-speed pumped storage, a dynamic frequency response model incorporating variable-speed pumped storage was constructed, and the nadir frequency constraint was established through second-order cone transformation. Information entropy theory was employed to quantify the uncertainty of unit failures, and an uncertainty set considering N-k unit failures was developed. A twostage robust emergency dispatch model considering N-k failures was established. The upper layer involved preventive unit commitment considering frequency security constraints, and the lower layer simulated post-N-k failure emergency dispatch. The column-and-constraint generation algorithm was used for the efficient solution. The simulation experiments have demonstrated that the proposed model effectively balances system operational economy and frequency security, enhancing the grid's resilience under conditions with complex and multiple failures.

Recommended Citation

Huang, Tao; Zhang, Zhi; Ding, Yujie; Chen, Yanbo; Wang, Jing; and Zhang, Wenqian (2025) "Robust Emergency Dispatch Method Considering Dynamic Frequency Security and N-k Contingency," Journal of System Simulation: Vol. 37: Iss. 12, Article 2.
DOI: 10.16182/j.issn1004731x.joss.25-0572
Available at: https://dc-china-simulation.researchcommons.org/journal/vol37/iss12/2

First Page

2981

Last Page

2993

CLC

TP391.9; TM732

Recommended Citation

Huang Tao, Zhang Zhi, Ding Yujie, et al. Robust Emergency Dispatch Method Considering Dynamic Frequency Security and N-k Contingency[J]. Journal of System Simulation, 2025, 37(12): 2981-2993.

Corresponding Author

Chen Yanbo

DOI

10.16182/j.issn1004731x.joss.25-0572