Study on the Dynamic Coupling Characteristics and Stability Control Strategies for the Hierarchical UHVDC and AC Hybrid System

被引：0
|
作者：
Zheng C. [1 ]
Li H. [1 ]
Zhang X. [1 ]
Lü P. [2 ]
Tang W. [3 ]
机构：
[1] China Electric Power Research Institute, Haidian District, Beijing
[2] State Grid Xinjiang Economic Research Institute, Urumqi, 830016, Xinjiang Uygur Autonomous Region
[3] State Grid Anhui Electric Power Company, Hefei, 230061, Anhui Province
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2019年 / 39卷 / 09期
关键词：
Commutation failure; Control strategies; Coupling paths; Hierarchical connection; Non-linear power characteristic; UHVDC; Voltage stability;
D O I：
10.13334/j.0258-8013.pcsee.180830
中图分类号：
学科分类号：
摘要：
Apart from the conventional coupling path between AC and DC, the UHVDC transmission with hierarchical connection mode also has the AC and AC, DC and DC coupling paths between different layers. So its dynamic behavior of a large disturbance will be more complex than the conventional UHVDC. In this paper, the electromechanical transient model of the hierarchical UHVDC was established firstly. For two types of fault with different features, by using the large disturbance excitation method (LDEM), the nonlinear power response characteristics of hierarchical UHVDC feeding system were revealed, the interaction mechanism and the degree of action of different coupling paths were analyzed. The influence of different factors on the nonlinear power characteristics was evaluated. Aiming to the threats of commutation failure and voltage instability, the control strategies of commutation failure prediction linkage controlling and active power emergency controlling were proposed. Simulation results got from the test system and the Sandong receiving end system with Zalute-Qingzhou hierarchical UHVDC connected verified the effectiveness of the control strategies. © 2019 Chin. Soc. for Elec. Eng.
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页码：2670 / 2680
页数：10
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