Grid strength analysis of hybrid multi-infeed HVDC system considering different control modes

被引：0
|
作者：
Jiang J.-X. [1 ]
Chen Q.-C. [2 ]
Wang F. [2 ]
Wang Y.-X. [1 ]
Li C. [3 ]
Wang G.-Z. [4 ]
机构：
[1] College of Electrical Engineering, Zhejiang University, Hangzhou
[2] State Grid Economic and Technological Research Institute Co. Ltd, Beijing
[3] State Grid Jiangsu Economic Research Institute, Nanjing
[4] Key Laboratory of Power System Intelligent Dispatch and Control, Ministry of Education, Shandong University, Jinan
来源：
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2023年 / 57卷 / 11期
关键词：
control mode; grid strength; hybrid multi-infeed high voltage direct current (HVDC) system; network modal decouple; voltage stability;
D O I：
10.3785/j.issn.1008-973X.2023.11.018
中图分类号：
学科分类号：
摘要：
A variety of high voltage direct current (HVDC) control methods were synthesized, in order to further improve the voltage support strength evaluation method of hybrid multi-infeed HVDC system based on network modal decoupling. The purpose is to make it suitable for the voltage stability analysis of hybrid multi-infeed HVDC systems with heterogeneous line commutated converter based HVDC (LCC-HVDC) and voltage source converter based HVDC (VSC-HVDC). The Jacobian matrix of the DC side for the LCC-HVDC system was derived, taking into account various control methods. The impact of LCC-HVDC control method on voltage stability margin was qualitatively analyzed, and based on this, an assessment method for the grid strength of a heterogeneous LCC-HVDC multi-input system was proposed. The main contradictions in voltage stability issues in mixed DC input systems were accurately grasped. The secondary influencing factors were approximated in the form of modal perturbations to maintain the practicality and convenience of the grid strength assessment method. The effectiveness of the proposed method was demonstrated through numerical calculations and time-domain simulations. Analysis results show that the constant extinction angle control mode of LCC-HVDC is the dominant control mode that deteriorates power system voltage stability. The voltage stability of the hybrid multi-infeed high voltage direct current (HVDC) system is stronger as the HVDC capacity decreases or the contact admittance increases. © 2023 Zhejiang University. All rights reserved.
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页码：2305 / 2313
页数：8
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