Study on Static Voltage Stability at Receiving Converter Bus of UHVDC Hierarchical Connection System

被引：0
|
作者：
Liu T. [1 ]
Wang Y. [1 ]
Gong H. [1 ]
Zhang W. [1 ]
机构：
[1] School of Electrical Engineering and Information, Sichuan University, Chengdu
来源：
Gaodianya Jishu/High Voltage Engineering | 2017年 / 43卷 / 10期
基金：
国家重点研发计划;
关键词：
MVSI; Operation condition; Parameters of AC system; Static voltage stability; UHVDC hierarchical connection;
D O I：
10.13336/j.1003-6520.hve.20170925012
中图分类号：
学科分类号：
摘要：
In the UHVDC hierarchical connection system, the reactive power regulation and voltage stability problem are more complicated. This is because there is an electrical coupling relationship between AC and DC systems, between the high and low converter valve groups and the two ends of the AC system with different voltage levels. Consequently, we proposed a multi-infeed voltage stability index(MVSI) based on traditional single-infeed voltage stability index(VSI). Moreover, combined with the UHVDC hierarchical access mathematical model, calculation equation of multi infeed voltage stability index was derived. Based on these equations, the influences of the system parameters at the receiving systems and the operating state of the DC system on the static voltage stability of the converter bus were studied. The analysis results show that the static voltage stability of the converter bus can be effectively improved by reducing the receiving system parameters, reducing equivalent connection impedance of two AC systems, reducing the transmission power of UHVDC hierarchical connection system, and increasing the arc extinguishing angle. And the equivalent impedance angle of the AC system at the receiving end will also affect the static voltage stability of the converter bus. © 2017, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：3231 / 3237
页数：6
相关论文
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