Study on VSC-HVDC asynchronous interconnection schemes for regional grids with concentrated small hydropower

被引：0
|
作者：
You G. [1 ]
Xu Z. [2 ]
Liu S. [2 ]
Xiao L. [2 ]
Sheng N. [2 ]
机构：
[1] Yunnan Power Grid Co., Ltd., Kunming, 650011, Yunnan Province
[2] College of Electrical Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang Province
来源：
| 1600年 / Power System Technology Press卷 / 40期
关键词：
Asynchronous interconnection; Small hydropower; Small-signal stability; VSC-HVDC; Yunnan grid;
D O I：
10.13335/j.1000-3673.pst.2016.04.012
中图分类号：
学科分类号：
摘要：
Large-scale integration and accommodation of multi-characteristic small hydropower is an urgent problem for power grids in China. A weak damping oscillation mode exists in western Yunnan power grid, where large-scale small hydropower is delivered in concentration. And this is the major constraint limiting transmission capacity of this area. To avoid weak damping oscillations of whole gridtriggered bylarge-scale small hydropower, VSC-HVDC systemscan be used to connect smallhydropower concentrated grids to backbone grid asynchronously to electrically isolate machine groups with largest participation factor from machine groups in backbone grid. This paper designed a VSC-HVDC back-to-back asynchronous interconnection scheme forenhancing economy and reducing DC system faultprobability. Besides, from perspective of optimizing power flow distribution of smallhydropower concentrated grids, a VSC-MTDC asynchronous interconnection scheme was designed. Effects of the two schemes on system small-signal stability and transmission capacity of small-hydropower concentrated grids were compared. Simulation results showed that both schemes could enhance small-signal stability of Yunnan grid and increase transmission capacity of smallhydropower concentrated grids effectively. © 2016, Power System Technology Press. All right reserved.
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页码：1059 / 1065
页数：6
相关论文
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