Impact of DC Line Voltage Drops on Power Flow of MTDC Using Droop Control

被引：271

作者：

Haileselassie, Temesgen M. ^{[1
]}

Uhlen, Kjetil ^{[1
]}

机构：

[1] Norwegian Univ Sci & Technol, Dept Elect Power Engn, N-7491 Trondheim, Norway

来源：

IEEE TRANSACTIONS ON POWER SYSTEMS | 2012年 / 27卷 / 03期

关键词：

DC grid; droop control; multiterminal VSC-HVDC (MTDC); voltage source converter high-voltage dc transmission (VSC-HVDC);

D O I：

10.1109/TPWRS.2012.2186988

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper discusses the impact of dc transmission voltage drops on the distribution of dc grid balancing power when dc voltage droop control is applied. DC line voltage drops in a multiterminal VSC-HVDC (MTDC) system result in nonuniform variations of dc bus voltages when changes in dc grid power flow occur. This in turn affects the distribution of instantaneous balancing power in a MTDC that uses dc voltage droop control. The values of dc voltage droop constants determine the degree of impact that dc voltage drops will have on the sharing of balancing power in the dc grid. In this paper, an analytical expression for estimating the distribution of balancing power which accounts for dc line voltage drops is derived. A five-terminal MTDC was modelled in PSCAD for demonstrating the effects of dc line voltage drops as well as for validating the proposed analytical expression which estimates balancing power distribution.

引用

页码：1441 / 1449

页数：9

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