| 引用本文: | 杨德友,赵康,王丽馨.基于全局灵敏度的区间模式阻尼提升策略[J].电力自动化设备,2021,41(11): |
| YANG Deyou,ZHAO Kang,WANG Lixin.Interval mode damping enhancement strategy based on global sensitivity[J].Electric Power Automation Equipment,2021,41(11): |
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| 摘要: |
| 互联系统中存在的弱阻尼低频振荡严重威胁电力系统安全稳定运行。针对系统中潜在的区间弱阻尼模式，提出了一种基于全局灵敏度的发电机有功调制策略，在线提高系统区间模式阻尼。首先利用随机子空间辨识算法从系统随机响应数据中提取系统振荡频率、阻尼比等振荡参数；在此基础上利用Sobol’法计算各参调发电机组的全局灵敏度，进而确定提升系统区间模式阻尼的关键发电机组；最后应用定向试探法根据当前运行方式下发电机有功输出及其限额确定有功调整量，从而实现区间弱阻尼模式阻尼的有效提升。IEEE 2区域4机系统和IEEE 5区域16机系统的仿真结果表明，通过全局灵敏度分析方法可以准确地对参调机组进行排序，应用所提阻尼提升策略可以有效提高系统阻尼。 |
| 关键词: 小干扰稳定性 弱阻尼模式 全局灵敏度 定向试探法 有功调制 |
| DOI：10.16081/j.epae.202110025 |
| 分类号:TM734 |
| 基金项目:国家自然科学基金资助项目(51877032)；国家电网公司科技项目(52230019000D) |
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| Interval mode damping enhancement strategy based on global sensitivity |
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YANG Deyou, ZHAO Kang, WANG Lixin
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School of Electrical Engineering, Northeast Electric Power University, Jilin 132012, China
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| Abstract: |
| The safe and stable operation of power system is threatened seriously by poor damping low-frequency oscillation in interconnected system. Aiming at the potential interval poor damping mode in the system, an active power modulation strategy of generator based on global sensitivity is proposed to improve the damping of interval mode online. Firstly, the stochastic subspace identification algorithm is used to extract oscillation frequency, damping ratio and other oscillation parameters of the system from the system random response data. On this basis, the Sobol’ method is used to calculate the global sensitivity of each generator participated in modulation, and then the key generator to enhance the interval mode damping of the system is determined. Finally, the directional trial method is used to determine the active power adjustment according to the generator active power output and its limitation under the current operation mode, which effectively improves the damping ratio of interval poor damping mode. The simulative results of IEEE 2-area 4-machine system and IEEE 5-area 16-machine system show that the global sensitivity analysis method can sort the units participated in modulation accurately, and the proposed damping enhancement strategy can improve the system damping effectively. |
| Key words: small signal stability poor damping mode global sensitivity directional trial method active power modulation |
