Phenomenon and Mechanism of Inter-area Tie-line Power Oscillation in Ultra-low Frequency Oscillation

被引：0
|
作者：
Xu G. [1 ,2 ,3 ]
Fang Y. [1 ,2 ,3 ]
Li Z. [1 ,2 ,3 ]
Wu X. [1 ,2 ,3 ]
Liu F. [1 ,2 ,3 ]
Li W. [1 ,2 ,3 ]
机构：
[1] NARI Group Corporation, State Grid Electric Power Research Institute, Nanjing
[2] NARI Technology Co., Ltd., Nanjing
[3] State Key Laboratory of Smart Grid Protection and Control, Nanjing
来源：
Fang, Yongjie (fangyongjie@sgepri.sgcc.com.cn) | 1600年 / Automation of Electric Power Systems Press卷 / 44期
基金：
国家重点研发计划;
关键词：
Damping torque; Frequency oscillation; Governor; Power oscillation; Primary frequency regulation; Ultra-low frequency oscillation (ULFO);
D O I：
10.7500/AEPS20191129005
中图分类号：
学科分类号：
摘要：
Ultra-low frequency oscillation (ULFO) refers to overall frequency oscillation caused by insufficient damping during the primary frequency regulation process. In general, there is no relative oscillation. However, in the study of the actual regional interconnected power grid, it has been found that, as the system frequency oscillates with ultra-low frequency, the same-frequency oscillation phenomenon also exists in the AC tie-line between two interconnected areas. Taking a two-area interconnected system as the research object, this paper analyzes the phenomenon and characteristics of tie-line power oscillation in ULFO based on the unified frequency model established by equivalent areas. Then the comprehensive frequency regulation effect coefficient of power grid is defined based on the damping torque theory. The mechanism of this phenomenon is proposed from the perspective of steady-state frequency response of linear system, and the influencing factors are also discussed. The research shows that, if there are differences in the comprehensive frequency regulation effect coefficients between two areas, they will also cause the same-frequency power oscillation of the inter-area tie-line as the steady-state ULFO, even after the ULFO reaches a steady-state oscillation. Finally, an actual power grid case is given for verification, and the possible harm of this phenomenon is discussed. © 2020 Automation of Electric Power Systems Press.
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页码：69 / 77
页数：8
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共 30 条
  • [1] HE Jingbo, ZHANG Jianyun, LI Mingjie, Et al., Frequency domain analysis and control for governor stability problem in islanded HVDC sending systems, Proceedings of the CSEE, 33, 16, pp. 137-143, (2013)
  • [2] CHEN Yiping, CHENG Zhe, ZHANG Kun, Et al., Frequency regulation strategy for islanding operation of HVDC, Proceedings of the CSEE, 33, 4, pp. 96-102, (2013)
  • [3] LI Wei, XIAO Xiangning, GUO Qi, Ultra-low-frequency oscillation and countermeasures in Yunnan-Guangdong UHVDC sending-end system in islanded operating mode, Automation of Electric Power Systems, 42, 16, pp. 161-166, (2018)
  • [4] LU Xiaomin, CHEN Lei, CHEN Yiping, Et al., Ultra-low-frequency oscillation of power system primary frequency regulation, Automation of Electric Power Systems, 41, 16, pp. 64-70, (2017)
  • [5] PICO H V, MCCALLEY J D, ANGEL A, Et al., Analysis of very low frequency oscillations in hydro-dominant power systems using multi-unit modeling, IEEE Transactions on Power Systems, 27, 4, pp. 1906-1915, (2012)
  • [6] CEBECI M E, KARAAGAC U, TOR O B, Et al., The effects of hydro power plants' governor settings on the stability of Turkish power system frequency
  • [7] CHEN Jinzhou, DUAN Ronghua, CHEN Lei, Et al., Frequency oscillation related to frequency regulation control of power system, Automation of Electric Power Systems, 43, 18, pp. 82-87, (2019)
  • [8] GUO Xiangyang, XU Zheng, DONG Huanfeng, Et al., Analysis on ultra-low frequency oscillation mechanism caused by hydroelectric units, Guangdong Electric Power, 31, 4, pp. 21-26, (2018)
  • [9] LIU Chengzhuo, WANG Yuhong, WANG Biao, Et al., Multi-HVDC modulations coordination based on DC sensitivity sequence and system transient energy function, Proceedings of the CSEE, 38, 21, pp. 6295-6304, (2018)
  • [10] CHEN Lei, LU Xiaomin, CHEN Yiping, Et al., Online analysis and emergency control of ultra-low-frequency oscillations using transient energy flow, Automation of Electric Power Systems, 41, 17, pp. 9-14, (2017)
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