| 引用本文: | 宋晓庆,徐永海,陶顺,张惠,任有刚,仝翠芝.考虑背景波动与量测数据相位缺失的系统侧谐波阻抗估计方法[J].电力自动化设备,2023,43(6): |
| SONG Xiaoqing,XU Yonghai,TAO Shun,ZHANG Hui,REN Yougang,TONG Cuizhi.System side harmonic impedance estimation method considering background fluctuation and phase angle missing of measurement data[J].Electric Power Automation Equipment,2023,43(6): |
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| 摘要: |
| 现有系统侧谐波阻抗估计方法通常基于公共连接点处谐波电压、电流的相量数据进行求解，在谐波电压、电流两者各自的相位信息发生缺失时难以估算。针对这一问题，提出一种基于相关性校验与Tukey稳健回归相结合的系统侧谐波阻抗求解方法，该方法仅需谐波电压、电流幅值及两者相位差数据。分析谐波数据的相关性，根据皮尔逊系数剔除波动数据段以保证系统侧谐波阻抗的求解免受背景波动的影响。基于Tukey稳健回归法在弱化谐波数据相位缺失所导致的潜在异常波动点的同时回归求解系统侧谐波阻抗值，所提方法可以有效弱化背景谐波电压波动与数据相位缺失的影响，进一步提高了估计精度。通过仿真分析和实际数据计算验证，证明了所提方法的有效性和正确性，为相位缺失场景的谐波阻抗求解问题提供了一条新途径。 |
| 关键词: 系统侧谐波阻抗 谐波数据相位缺失 背景谐波电压波动 相关性校验 Tukey稳健回归 |
| DOI：10.16081/j.epae.202211005 |
| 分类号:TM72 |
| 基金项目:国家自然科学基金资助项目(51777066) |
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| System side harmonic impedance estimation method considering background fluctuation and phase angle missing of measurement data |
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SONG Xiaoqing1,2, XU Yonghai1, TAO Shun1, ZHANG Hui2, REN Yougang2, TONG Cuizhi2
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1.State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China;2.Smart Distribution Network Center of State Grid Jibei Electric Power Co.,Ltd.,Qinhuangdao 066100, China
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| Abstract: |
| The existing system side harmonic impedance estimation methods are usually based on the phasor data of the harmonic voltage and current at the point of common coupling, and it is difficult to estimate when the respective phase angle information of the harmonic voltage and current is missing. In order to solve this problem, a system impedance solution method based on the combination of correlation check and Tukey robust regression is proposed, which only needs harmonic voltage and current amplitude and their phase difference data. Firstly, the correlation of harmonic data is analyzed, and the fluctuation data segment is eliminated according to the Pearson coefficient to ensure that the solution of the system impedance is not affected by the background fluctuation. Based on the Tukey robust regression method, the system impedance value is regressed while weakening the potential abnormal fluctuation points caused by the missing of harmonic phase angle data. The proposed method can effectively weaken the influence of background harmonic voltage fluctuations and missing data phase angle, and further improve the estimation accuracy. The effectiveness and correctness of the proposed method are proved by simulation analysis and actual data calculation verification, which provides a new way to solve the harmonic impedance problem in the phase missing scene. |
| Key words: system side harmonic impedance phase angle missing of harmonic data background harmonic voltage fluctuation correlation check Tukey robust regression |
