文献类型：期刊文献

中文题名：Istraivanje stabilnosti Multi-DGs sustava

英文题名：RESEARCH ON THE STABILITY OF MULTI-DGS SYSTEM

作者：Chen, Zhuo Tang, Xuanqun Zhang, Hongjun Zhang, Qingfang Liu, Yan

通信作者：Chen, Z[1]

机构：[1]Guizhou Univ, Coll Elect Engn, Guizhou Inst Technol, Guizhou Key Lab Elect Power Big Data, Guiyang 550025, Peoples R China;[2]Guizhou Univ, Coll Elect Engn, Guiyang 550025, Peoples R China

第一机构：贵州理工学院电气与信息工程学院

通信机构：corresponding author), Guizhou Univ, Coll Elect Engn, Guizhou Inst Technol, Guizhou Key Lab Elect Power Big Data, Guiyang 550025, Peoples R China.|贵州理工学院电气与信息工程学院;贵州理工学院;

年份：2017

卷号：24

期号：2

起止页码：449-457

外文期刊名：TEHNICKI VJESNIK-TECHNICAL GAZETTE

收录：;EI(收录号：20171603588387);WOS:【SCI-EXPANDED(收录号:WOS:000399563100017)】；

基金：The authors gratefully acknowledge the support of the National Natural Science Fund of China (51567005), and Introduce Talents Research Fund of Guizhou University (2014-07) and Feng Neng Science and Technology Development Co., Ltd.

语种：英文

外文关键词：anti-islanding; critical time-delay; multi-DGs system; power system damping; wind farm

摘要：This paper presents an improved model of multi-DGs system for enhancing the stability. The distributed generations (DGs) in the system are equipped with the additional active power controller as the technique of enhancing the wind-thermal-bundled system stability. Firstly, the influence of multi-DGs system on the oscillation of the system is analysed. Then, the conditions for DGs producing positive damping to the power system are obtained. Secondly, taking the wind farm as the study object, the increment of the frequency of the point of common coupling (PCC) in the wind farm is feedback to the active control loops for regulating the active power of wind turbine. At the same time, the multi-DGs system holds a positive damping effect on the power system which enables the dynamic behaviour of the wind farm to be improved. Thirdly, the effect of time delay on control performance is further considered and two propositions for solving critical time-delay are put forward and proved, which are used as the constraint condition of additional active power control. Finally, the time domain simulation is implemented and the correctness of the proposed method is verified by the root locus analysis and frequency domain simulation. The results show that the additional active power control can significantly enhance the power system damping. However, the wind farm will provide negative damping and even the whole system will not maintain the power angle stability when the time-delay increases and exceeds the critical time-delay.