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抑制超低频振荡的稳定器控制机理及策略验证
作者:
作者单位:

1.电力系统广域测量与控制四川省重点实验室,电子科技大学,四川省成都市 611731;2.中国电力科学研究院有限公司,北京市 100192;3.国网四川省电力公司电力科学研究院,四川省成都市 610072

作者简介:

易建波(1981—),男,通信作者,副教授,硕士生导师,主要研究方向:电力系统分析与控制、电力系统故障诊断。E-mail:jimbo_yi@uestc.edu.cn
张国洲(1995—),男,硕士研究生,主要研究方向:电力系统安全稳定性分析。E-mail:zgzguozhou@163.com
刘敏(1980—),女,高级工程师,主要研究方向:电力系统稳定分析与控制。E-mail:liumin@epri.sgcc.com.cn

通讯作者:

易建波(1981—),男,通信作者,副教授,硕士生导师,主要研究方向:电力系统分析与控制、电力系统故障诊断。E-mail:jimbo_yi@uestc.edu.cn

基金项目:

国家重点研发计划资助项目(2017YFB0902000); 国家电网公司科技项目(521999180001)。


Control Mechanism and Strategy Verification of Stabilizer for Suppressing Ultra-low Frequency Oscillation
Author:
Affiliation:

1.Key Laboratory of Wide-area Measurement and Control on Power System of Sichuan Province, University of Electronic Science and Technology of China, Chengdu 611731, China;2.China Electric Power Research Institute, Beijing 100192, China;3.Power Research Institute of State Grid Sichuan Electric Power Company, Chengdu 610072, China

Fund Project:

This work is supported by National Key R&D Program of China (No. 2017YFB0902000) and State Grid Corporation of China (No. 521999180001).

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    摘要:

    电力系统稳定器(PSS)是解决低频振荡的有效手段,但对于富集水电互联系统出现的超低频振荡,无法提供有效正阻尼。文中基于复转矩系数法对超低频振荡机理进行剖析,理论推导出附加阻尼控制的可行性。利用分频段控制思想,对传统PSS附加低通分支以拓展超低频控制段,构建新型抑制超低频振荡的PSS控制结构,同时提出频段设定和计及系统工况变化的控制参数鲁棒整定算法。通过应用于四川电网某水电外送区域的实例测试,验证了该附加阻尼控制策略对不同工况下产生的超低频振荡均能有效抑制。

    Abstract:

    Power system stabilizer (PSS) is an effective means to solve low-frequency oscillation, but it cannot provide effective positive damping to suppress the ultra-low frequency oscillations which occur in enriched hydropower interconnection systems. Based on the complex torque coefficient method, the mechanism of ultra-low frequency oscillations is analyzed and the feasibility of additional damping control is verified. By utilizing the sub-band control idea, a low-pass branch is added to the traditional PSS to expand the ultra-low frequency control section, and a new anti-ultra-low frequency oscillation of power system stabilizer (AULFOPSS) controller structure is constructed. Then, the robust set algorithm is proposed to set the frequency band and the control parameters considering the changes of the system operation conditions. Through the example test applied to a hydropower outgoing area of Sichuan Power Grid in China, it is verified that the additional damping control method can effectively suppress the ultra-low frequency oscillations generated in different operating conditions.

    表 1 部分机组水锤效应常数值TWTable 1 Water hammer effect constant values TW of part units
    表 4 Table 4
    表 2 新型AULFOPSS各环节变量Table 2 Variables of each new AULFOPSS link
    表 5 Table 5
    图1 计及原动机调节系统的Phillips-Heffron模型Fig.1 Phillips-Heffron model considering adjustment system of prime mover
    图2 AULFOPSS控制结构图Fig.2 Structure diagram of AULFOPSS control
    图3 典型参数情形下PSS1A与新型AULFOPSS的幅频特性Fig.3 Amplitude and frequency characteristic of PSS1A and new AULFOPSS with typical parameters
    图4 某水电区域外送通道简化拓扑Fig.4 Simplified topology for outbound channels of a certain hydropower area
    图5 抑制超低频振荡控制措施对比图Fig.5 Comparison diagram of different control strategies against ultra-low frequency oscillations
    图6 川江边1号机组在场景6的频率偏差变化轨迹Fig.6 Trajectories of frequency deviation variation for Chuanjiangbian unit 1 in scenario 6
    图7 川江边1号机组在场景9的频率偏差变化轨迹Fig.7 Trajectories of frequency deviation variation of Chuanjiangbian unit 1 in scenario 9
    图 带通环节幅频特性曲线Fig. Amplitude frequency characteristic of band-pass
    表 3 Table 3
    表 6 Table 6
    图 不同Tw情形下阻尼特性曲线Fig. Damping curves under a variety of Tw
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引用本文

易建波,张国洲,刘敏,等.抑制超低频振荡的稳定器控制机理及策略验证[J].电力系统自动化,2020,44(8):192-199. DOI:10.7500/AEPS20190530013.
YI Jianbo,ZHANG Guozhou,LIU Min,et al.Control Mechanism and Strategy Verification of Stabilizer for Suppressing Ultra-low Frequency Oscillation[J].Automation of Electric Power Systems,2020,44(8):192-199. DOI:10.7500/AEPS20190530013.

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  • 收稿日期:2019-05-30
  • 最后修改日期:2019-12-11
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  • 在线发布日期: 2020-04-23
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