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Primary Frequency Regulation for Multi-Infeed HVDC System Using Model Predictive Control and Local Estimation
  • Guoliang Tian,
  • Zhengchun Du,
  • Yujun Li
Guoliang Tian
Xi'an Jiaotong University
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Zhengchun Du
Xi'an Jiaotong University
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Yujun Li
Xi'an Jiaotong University

Corresponding Author:[email protected]

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This paper proposes a novel primary frequency regulation (PFR) scheme for Multi infeed HVDC (MIDC) system. First, a dynamic model for frequency response (FR) in MIDC system is carried out to involve LCC-HVDCs in frequency regulation. Then, a disturbance observer (DO) is proposed to estimate both the power imbalance and the full order states of the system. By combining a Kalman filter (KF), this DO gets an accurate estimation quickly with local frequency measurement. On the basis of the estimated disturbance and state variables, feedforward control schemes can be concluded to fully utilize the fast adjustability of LCC-HVDCs. In this paper, an model predictive control (MPC) based scheme is designed to coordinate LCC-HVDCs under constraints of HVDC capacity and frequency boundaries. As a result, the optimal power-sharing property of LCC-HVDCs is achieved to enhance the PFR dynamic performance of the AC main system. Further, the stability of the proposed method is analyzed using Lyapunov method. Finally, numerical simulations are concluded to verify the effectiveness and the merits of the proposed method, by comparing it to typical droop controls.
30 Mar 2023Submitted to IET Generation, Transmission & Distribution
03 Apr 2023Submission Checks Completed
03 Apr 2023Assigned to Editor
11 Apr 2023Reviewer(s) Assigned
12 Jun 2023Review(s) Completed, Editorial Evaluation Pending
19 Jun 2023Editorial Decision: Revise Major
15 Jul 20231st Revision Received
27 Jul 2023Submission Checks Completed
27 Jul 2023Assigned to Editor
04 Aug 2023Reviewer(s) Assigned
07 Sep 2023Review(s) Completed, Editorial Evaluation Pending
08 Sep 2023Editorial Decision: Accept