Computation Method of the Closest Saddle-node Bifurcation Point in LCC-HVDC Multi-infeed Systems

被引：0

作者：

Wang, Guanzhong ^{[1
]}

Wang, Wei ^{[1
]}

Zhang, Yu ^{[1
]}

Shi, Qianhong ^{[1
]}

Guo, Yichen ^{[1
]}

Ding, Lei ^{[1
]}

Zhang, Liangyi ^{[2
]}

Wang, Erxi ^{[2
]}

机构：

[1] Key Laboratory of Power System Intelligent Dispatch and Control, Shandong University, Ministry of Education, Shandong Province, Jinan

[2] State Grid Hubei Electric Power Research Institute, Hubei Province, Wuhan

来源：

Dianwang Jishu/Power System Technology | 2025年 / 49卷 / 03期

关键词：

DC multi-infeed system; generalized short-circuit ratio; iterative search; saddle-node bifurcation;

D O I：

10.13335/j.1000-3673.pst.2023.0451

中图分类号：

学科分类号：

摘要：

As more and more new energy power generation is transmitted across regions through DC transmission, the multi-DC feed-to-receive system faces severe voltage stability risks. Relying on the grid strength represented by the generalized short-circuit ratio and its relationship with the voltage stability margin of the multi-infeed system, this paper proposes an iterative search algorithm for the nearest saddle-node bifurcation point in the multi-DC injection power space, which can be used to quickly calculate Euclidean distance from the current operation to the stable boundary. Firstly, according to the critical generalized short-circuit ratio of the DC multi-infeed system, the power space algebraic equations representing the saddle-node bifurcation of the system are constructed by using the singularity of the extended admittance matrix. Secondly, the right eigenvector corresponding to the generalized short-circuit ratio is proved to construct the normal vector of the stable boundary in the power parameter space, and the power space established by the generalized short-circuit ratio is convex. Finally, using the above results, an iterative search algorithm for the nearest saddle-node bifurcation point in the multi-DC power injection space is proposed. The calculation results of the example show that the proposed method meets the engineering requirements and provides a convenient tool for the stability risk identification of the multi-feed system. © 2025 Power System Technology Press. All rights reserved.

引用

页码：1130 / 1136

页数：6

共 22 条

[1]

ZHOU Hao, ZHONG Yijun, Applicable occasions of UHVAC/UHVDC transmission and their technology comparisons in China[J], Electric Power Automation Equipment, 27, 5, pp. 6-12, (2007)

[2]

Huangqing XIAO, Kaiqi SUN, Jiuping PAN, Review of hybrid HVDC systems combining line communicated converter and voltage source converter[J], International Journal of Electrical Power & Energy Systems, 129, (2021)

[3]

LI Mingjie, GUO Qiang, HE Jingbo, Typical test system of UHV AC and DC Network with high penetration of new energy (1): Test system for analyzing voltage and power angle stability, Power System Technology, 47, 10, pp. 3935-3943, (2023)

[4]

ZHONG Wenliang, LIU Jian, LIN Sheng, A Preliminary study on the influence mechanism of DC commutation failure considering photovoltaic access in terminal power grid[J], Power System Technology, 48, pp. 3043-3052, (2024)

[5]

Miao FAN, SUN Kai, LANE D, A novel generation rescheduling algorithm to improve power system reliability with high renewable energy penetration[J], IEEE Transactions on Power Systems, 33, 3, pp. 3349-3357, (2018)

[6]

(2011)

[7]

LIU Juntao, WANG Juanjuan, YE Yunming, Influence of Different PLLs on Stability of LCC-HVDC Control Loop, Power System Technology, 48, pp. 1202-1217, (2024)

[8]

WANG Guanzhong, WANG Yixin, DAN Yangqing, Qualitative analysis of critical mode for voltage stability in multi-infeed DC system[J], Journal of Zhejiang University (Engineering Science), 57, 3, pp. 616-624, (2023)

[9]

JIANG Tao, LI Xue, LI Guoqing, A predictor-corrector algorithm for forming voltage stability region of hybrid AC/DC power grid with inclusion of VSC-MTDC[J], Transactions Of China Electrotechnical Society, 37, 7, pp. 1746-1759, (2022)

[10]

YANG Xiaoyu, ZHOU Xiaoxin, LI Lixin, Computation of the closest saddle-node bifurcation point (CSNBP) in power injection space of high dimensional power flow equations[J], Power System Technology, 37, 10, pp. 2814-2818, (2013)

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