| 引用本文: | 林顺富,李育坤,李 寅,李东东.基于混合寻优算法及分离一致性判断的系统谐波阻抗估计[J].电力系统保护与控制,2022,50(20):106-116.[点击复制] |
| LIN Shunfu,LI Yukun,LI Yin,LI Dongdong.Harmonic impedance estimation based on a hybrid optimization algorithm andseparation consistency screening[J].Power System Protection and Control,2022,50(20):106-116[点击复制] |
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| 摘要: |
| 针对独立成分分析方法中源信号非独立性引起的估计误差，提出一种基于混合寻优及分离一致性判断的系统谐波阻抗估计方法。首先对公共连接点谐波电压和谐波电流测量数据进行中心化与白化处理。其次，采用混沌映射获得初试解位置，以负熵最大作为目标函数，采用生物地理学-增强烟花混合算法寻优获得分离矩阵。进一步进行分离一致性判断，得到具有较好独立性的分离矩阵。最后采用最小二乘法计算得到系统谐波阻抗。仿真和工程实例验证了所提方法与其他ICA算法相比具有更好的估计精度。 |
| 关键词: 谐波责任 独立成分分析 系统谐波阻抗 混合寻优算法 一致性判断 |
| DOI：DOI: 10.19783/j.cnki.pspc.211733 |
| 投稿时间：2021-12-19修订日期：2022-03-08 |
| 基金项目:国家自然科学基金项目资助(51977127)；上海市科学技术委员会项目资助(19020500800)；上海市教育发展基金会和上海市教育委员会“曙光计划” 项目资助(20SG52) |
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| Harmonic impedance estimation based on a hybrid optimization algorithm andseparation consistency screening |
| LIN Shunfu,LI Yukun,LI Yin,LI Dongdong |
| (Shanghai University of Electric Power, Shanghai 200090, China) |
| Abstract: |
| There is an estimation error caused by the non-independence of the source signal in the independent component analysis (ICA) method. Thus a system harmonic impedance estimation method based on the hybrid optimization and the separation consistency judgment is proposed. First, the data of the harmonic voltage and harmonic current measured at the point of common connection are centralized and whitened. Secondly, the position of the initial solution is obtained by chaotic mapping, and then the separation matrix is obtained by the biogeography-enhanced fireworks hybrid algorithm with the objective function of maximum negative entropy. Further, the separation matrix with better independence is obtained through separation consistency judgment. Finally, the harmonic impedance of the system is calculated by the least squares method. Simulation and case study results prove that the proposed method has better estimation accuracy than exiting ICA algorithms.
This work is supported by the National Natural Science Foundation of China (No. 51977127). |
| Key words: harmonic responsibility independent component analysis system harmonic impedance hybrid optimization algorithm consistency judgment |
