| 引用本文: | 马 莉,陈应雨,田钉荣,等.基于改进层次分析法的多级电压暂降严重程度评估[J].电力系统保护与控制,2023,51(17):49-57.[点击复制] |
| MA Li,CHEN Yingyu,TIAN Dingrong,et al.Severity evaluation of multistage voltage sag based on an improved analytic hierarchy process[J].Power System Protection and Control,2023,51(17):49-57[点击复制] |
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| 摘要: |
| 准确评估多级电压暂降的严重程度对敏感设备的稳定运行及电压暂降治理具有重要意义。提出了一种基于改进层次分析法的多级电压暂降严重程度评估方法。首先，分析了瞬时性故障和永久性故障下重合闸相应动作过程的多级电压暂降波形。然后，运用权值函数法求出各级暂降的严重程度。基于过程免疫时间的特性，刻画出敏感设备的多级电压暂降过程免疫时间(process immunity time, PIT)特性曲线。利用各级暂降的关联性和严重程度指标值对层次分析法进行改进，确定了各级暂降的权重，实现了多级电压暂降严重程度的量化评估。最后，采用改造后的IEEE30节点系统进行仿真验证。结果表明，所提方法合理且有效，减少了评估结果的主观性，为敏感设备多级电压暂降的评估和治理提供依据。 |
| 关键词: 多级电压暂降 短路故障 重合闸 严重程度评估 层次分析法 PIT曲线 |
| DOI：10.19783/j.cnki.pspc.221734 |
| 投稿时间：2022-11-02修订日期：2023-01-29 |
| 基金项目:国家自然科学基金项目资助(51777166) |
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| Severity evaluation of multistage voltage sag based on an improved analytic hierarchy process |
| MA Li,CHEN Yingyu,TIAN Dingrong,LOU Jinghui,LI Yu,ZHANG Yanhu |
| (School of Electrical and Control Engineering, Xi’an University of Science and Technology, Xi’an 710054, China) |
| Abstract: |
| It is important to accurately evaluate the severity of multistage voltage sag for the stable operation of sensitive devices and the governance of voltage sag. This paper presents a method for evaluating the severity of multistage voltage sag based on an improved analytic hierarchy process. First, the multistage voltage sag waveform of the reclosing process under transient and permanent faults is analyzed. Then, the voltage sag evaluation by the weight function method is used to calculate the severity of each stage sag. Based on the time characteristic of process immunity, the multistage voltage sag PIT characteristic curve of a sensitive device is described. Taking advantage of the correlation and severity index value of each stage sag, the weight of each stage sag is determined. The multistage voltage sag severity can be evaluated quantitatively. Finally, the modified IEEE-30 system is used for simulation verification. The results show that the proposed method is reasonable and effective. It reduces the subjectivity of the evaluation results and provides a basis for the evaluation and governance of multistage voltage sag of a sensitive device. |
| Key words: multistage voltage sag short circuit fault reclosing severity assessment AHP PIT curve |
