油纸绝缘混合极化的频域谱模型及参数辨识
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摘要
采用等效模型分析是间接评估油纸绝缘老化状态的一种有效方法,而构建油纸绝缘系统的等效模型及参数计算是研究的基础和难点。针对目前广泛采用扩展德拜模型存在的不足,引入界面极化支路的油纸绝缘混合极化等效模型更为贴合实际极化过程,同时研究油纸绝缘混合极化过程的频域介电谱模型参数辨识方法。首先,在新型极化等效电路基础上导出频域谱与电路参数之间的关系;其次,建立求解多元方程组的目标函数,然后应用自适应收缩因子粒子群算法(ACPSO)进行参数求解;最后,通过实测数据验证该方法辨识模型参数的可行性与准确性。计算结果表明,考虑有界面极化的混合等效模型更能真实反映油纸绝缘的弛豫过程,它更符合变压器绝缘极化的实际情况;基于频域介电谱的油纸绝缘等效模型参数辨识法,相比于此前基于时域介电谱的辨识方法,具有求解过程简单、参数计算结果准确可靠等优点。
The equivalent model analysis is an effective method to indirectly assess the aging state of oil-paper insulation,and it is essential and difficult to construct the equivalent model and identify model parameters of the oil paper insulation system. In view of the shortcomings of the extended Debye model,the mixed polarization equivalent model of the oil-paper insulation with the interface polarization branch is introduced to describe the actual polarization process. At the same time,the parameter identification method of dielectric spectrum model in frequency domain for oil-paper insulation mixed polarization process is studied. Firstly,the relationship between frequency spectrum and circuit parameters is derived based on a new polarization equivalent circuit. Secondly,the objective function for solving multivariate equations is established,and then the parameters are solved by ACPSO algorithm. Finally,the feasibility and accuracy of the method for identifying model parameters are verified by measured data. Results show that the mixed equivalent model considering the interface polarization can reflect the relaxation process of oil-paper insulation more truly,and it is more consistent with the actual situation of transformer insulation polarization. Compared with the identification method based on timedomain dielectric spectroscopy,the identification method of the equivalent model of oil-paper insulation based on FDS is simple,accurate and reliable.
The equivalent model analysis is an effective method to indirectly assess the aging state of oil-paper insulation,and it is essential and difficult to construct the equivalent model and identify model parameters of the oil paper insulation system. In view of the shortcomings of the extended Debye model,the mixed polarization equivalent model of the oil-paper insulation with the interface polarization branch is introduced to describe the actual polarization process. At the same time,the parameter identification method of dielectric spectrum model in frequency domain for oil-paper insulation mixed polarization process is studied. Firstly,the relationship between frequency spectrum and circuit parameters is derived based on a new polarization equivalent circuit. Secondly,the objective function for solving multivariate equations is established,and then the parameters are solved by ACPSO algorithm. Finally,the feasibility and accuracy of the method for identifying model parameters are verified by measured data. Results show that the mixed equivalent model considering the interface polarization can reflect the relaxation process of oil-paper insulation more truly,and it is more consistent with the actual situation of transformer insulation polarization. Compared with the identification method based on timedomain dielectric spectroscopy,the identification method of the equivalent model of oil-paper insulation based on FDS is simple,accurate and reliable.
引文
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[11]李安娜,蔡金锭.油纸绝缘系统混联等效电路及参数辨识的研究[J].仪器仪表学报,2014,35(9):2130-2136.LI AN N,CAI J D. Study on parallel-series equivalent circuit and parameters identification of oil-paper insulation system[J]. Chinese Journal of Scientific Instrument,2014,35(9):2130-2136.
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[13]董明,刘媛,任明,等.油纸绝缘频域介电谱解释方法研究[J].中国电机工程学报,2015,35(4):1002-1008.DONG M,LIU Y,REN M,et al. Explanation study of frequency-domain dielectric spectroscopy for oil-paper insulation system[J]. Proceedings of the CSEE,2015,35(4):1002-1008.
[14]廖瑞金,郝建,杨丽君,等.变压器油纸绝缘频域介电谱特性的仿真与实验研究[J].中国电机工程学报,2010,30(22):113-119.LIAO R J,HAO J,YANG L J,et al. Simulation and experimental study on frequency-domain dielectric spectroscopy of oil-paper insulation for transformers[J].Proceedings of the CSEE,2010,30(22):113-119
[15]廖瑞金,刘捷丰,杨丽君,等.电力变压器油纸绝缘状态评估的频域介电特征参量研究[J].电工技术学报,2015,30(6):247-254.LIAO R J,LIU J F,YANG L J,et al. Investigation on frequency domain dielectric characteristics for condition assessment of transformer oil-paper insulation[J].Transactions of China Electrotechnical Society, 2015,30(6):247-254.
[16]邹阳,蔡金锭,甘露.基于状态空间方程的油纸绝缘系统等效电路参数辨识[J].福州大学学报(自然科学版),2015,43(1):68-74.ZOU Y,CAI J D,GAN L. Identifying equivalent circuit parameters of oil-paper insulation system based on statespace equation[J]. Journal of Fuzhou University(Natural Science Edition),2015,43(1):68-74.
[17] Cl ERC M,KENNEDY J. The particle swarm:explosion,stability,and convergence in a multidimensional complex space[J]. IEEE Transactions on Evolutionary Computation,2002,6(1):58-73.
[2]祝顺才,蔡金锭.基于模糊-灰色聚类的油纸绝缘状态综合诊断[J].仪器仪表学报,2017,38(3):718-725.ZHU SH C,CAI J D. Comprehensive diagnosis of oilpaper insulation status based on fuzzy gray clustering[J].Chinese Journal of Scientific Instrument,2017,38(3):718-725.
[3]林智勇,张达敏,黄国泰,等.回复电压微分谱线特性的变压器绝缘老化研究[J].仪器仪表学报,2017,38(8):1954-1960.LIN ZH Y,ZHANG D M,HUANG G T,et al. Insulation aging of transformer based on recovery voltage differential spectrum line characteristic[J]. Chinese Journal of Scientific Instrument,2017,38(8):1954-1960.
[4] PATSCH R,KOUZMINE O. P-factor,a meaningful parameter for the evaluation of return voltage measurements[C]. Report Conference on Electrical Insulation and Dielectric Phenomena,2002:906-909.
[5] GAFVERT U,ILDASTAD E. Modelling return voltage measurements of multi-layer insulation systems[C]. 4th International Conference on Properties and Applications of Dielectric Materials,1994:123-126.
[6] BOGNAR A,CSEPES G,KALOCSAI L,et al. Spectrum of polarization phenomena of long time-constant as a diagnostic method of oil-paper insulating systems[C].Proceedings of the 3rd International Conference on Properties and Applications of Dielectric Materials,IEEE,1991:723-726.
[7]张涛.基于回复电压特征量的变压器油纸绝缘状态诊断研究[D].福州:福州大学,2010.ZHANG T. Research on diagnosis of oil-paper insulation condition in transformer based on return voltage characteristic quantities[D]. Fuzhou:Fuzhou University,2010.
[8]贺德华,蔡金锭,蔡嘉.油纸绝缘等效电路参数辨识及老化状态评估[J].高电压技术,2017,43(6):1988-1994.HE D H, CAI J D, CAI J. Method for parameter identification of equivalent circuit of oil-paper insulation and its research[J]. High Voltage Engineering,2017,43(6):1988-1994.
[9]王骞,臧春艳,张明丽.油纸绝缘结构介质响应电路模型的参数辨识方法研究[J].高压电器,2012,48(6):7-11,17.WANG Q,ZANG CH Y,ZHANG M L. Research on the method of parameter identification for dielectric response equivalent circuit of oil-paper insulation[J]. High Voltage Apparatus,2012,48(6):7-11,17.
[10]蔡金锭,曾静岚.基于二次时域微分解析法的油纸绝缘介质响应参数辨识[J].高电压技术,2017,43(6):1937-1942.CAI J D, ZENG J L. Parameter identification for dielectric response of oil-paper insulation based on second time-differential analysis[J]. High Voltage Engineering,2017,43(6):1937-1942.
[11]李安娜,蔡金锭.油纸绝缘系统混联等效电路及参数辨识的研究[J].仪器仪表学报,2014,35(9):2130-2136.LI AN N,CAI J D. Study on parallel-series equivalent circuit and parameters identification of oil-paper insulation system[J]. Chinese Journal of Scientific Instrument,2014,35(9):2130-2136.
[12]黄云程,蔡金锭,卢晋怡.油纸绝缘变压器新型混合极化电路模型及其参数计算[J].电工技术学报,2016,31(17):170-177.HUANG Y CH, CAI J D, LU J Y. New mixed polarization circuit model and parameters identification of oil-paper insulation transformers[J]. Transactions of China Electrotechnical Society,2016,31(17):170-177.
[13]董明,刘媛,任明,等.油纸绝缘频域介电谱解释方法研究[J].中国电机工程学报,2015,35(4):1002-1008.DONG M,LIU Y,REN M,et al. Explanation study of frequency-domain dielectric spectroscopy for oil-paper insulation system[J]. Proceedings of the CSEE,2015,35(4):1002-1008.
[14]廖瑞金,郝建,杨丽君,等.变压器油纸绝缘频域介电谱特性的仿真与实验研究[J].中国电机工程学报,2010,30(22):113-119.LIAO R J,HAO J,YANG L J,et al. Simulation and experimental study on frequency-domain dielectric spectroscopy of oil-paper insulation for transformers[J].Proceedings of the CSEE,2010,30(22):113-119
[15]廖瑞金,刘捷丰,杨丽君,等.电力变压器油纸绝缘状态评估的频域介电特征参量研究[J].电工技术学报,2015,30(6):247-254.LIAO R J,LIU J F,YANG L J,et al. Investigation on frequency domain dielectric characteristics for condition assessment of transformer oil-paper insulation[J].Transactions of China Electrotechnical Society, 2015,30(6):247-254.
[16]邹阳,蔡金锭,甘露.基于状态空间方程的油纸绝缘系统等效电路参数辨识[J].福州大学学报(自然科学版),2015,43(1):68-74.ZOU Y,CAI J D,GAN L. Identifying equivalent circuit parameters of oil-paper insulation system based on statespace equation[J]. Journal of Fuzhou University(Natural Science Edition),2015,43(1):68-74.
[17] Cl ERC M,KENNEDY J. The particle swarm:explosion,stability,and convergence in a multidimensional complex space[J]. IEEE Transactions on Evolutionary Computation,2002,6(1):58-73.