Suppression Scheme for Ultra-low Frequency Oscillation Based on Frequency Limit Controller

被引：0
|
作者：
Li J. [1 ]
Wang B. [1 ]
Liu C. [2 ]
Wang Y. [2 ]
Hu X. [1 ]
Han L. [3 ]
机构：
[1] State Grid Sichuan Electric Power Company, Chengdu
[2] College of Electrical Engineering and Information Technology, Sichuan University, Chengdu
[3] Nari-relay Engineering Technique Co., Ltd., Nanjing
来源：
Gaodianya Jishu/High Voltage Engineering | 2019年 / 45卷 / 07期
关键词：
DC order factor; Frequency limit controller; Improved particle swarm optimization; TLS-ESPRIT; Ultra-low frequency oscillation;
D O I：
10.13336/j.1003-6520.hve.20180822011
中图分类号：
学科分类号：
摘要：
With the developmment of Luxi Back-to-Back HVDC project and Yu'e Back-to-Back HVDC project, ultra-low frequency oscillation becomes a serious threat to the stability of power system. For an asynchronous interconnection multi-send HVDC system, the mechanism of ultra-low frequency oscillation and suppressing ultra-low frequency oscillation by FLC (frequency limit controller) is analyzed. Considering the distribution of hydropower in the sending end, a new DC sorting method is proposed, which combines the influences of DC power change on AC system and sensitivity of ultra-low frequency oscillation mode. Based on the results above, a new suppression scheme is proposed. In order to achieve a better suppression effect, the multi DC optimization problem is transformed into multiple single-DC sequential optimization problems in the scheme by TLS-ESPRIT (total least squares-estimation of signal parameters via rotational invariance techniques) and improved PSO (particle swarm optimization). Finally, the effectiveness of the scheme is verified by simulation results of Sichuan-Chongqing power system which already has an asynchronous interconnection with Hubei power system. © 2019, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：2126 / 2133
页数：7
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