适用于并网系统的长距离传输电缆建模研究
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摘要
在包含长距离传输电缆的分布式发电单元并网系统中,由于传输电缆模型是一个非线性模型,如Bode图、Nyquist图等适用于线性模型的分析方法不能直接应用在此类系统的分析中。为了方便对此类系统的分析,需要对传输电缆模型进行线性化。本文在分析了传输电缆实际阻抗模型特征的基础上提出了通过Taylor近似对传输电缆阻抗模型进行线性化的方法。通过对不同长度的传输电缆进行拟合阶数分析得出短传输线使用低阶拟合模型,长传输线使用高阶拟合模型的结论。实验和仿真验证了理论的正确性。
In the grid-connected system with long distance transmission cable distributed power generation unit, since the transmission cable model is a nonlinear model,analysis methods which are suitable for linear models,Bode diagrams and Nyquist diagrams and so on, cannot be directly applied to the analysis of such systems. To facilitate the analysis of such systems, the transmission cable model needs to be linearized. In this paper, the Taylor approximation method is proposed based on the analysis of the actual impedance model of transmission cable. Through the analysis of the fitting order of transmission cables of different lengths, it is concluded that the short transmission line uses the low-order fitting model and the long transmission line uses the high-order fitting model. Experiments and simulations verify the correctness of the theory.
In the grid-connected system with long distance transmission cable distributed power generation unit, since the transmission cable model is a nonlinear model,analysis methods which are suitable for linear models,Bode diagrams and Nyquist diagrams and so on, cannot be directly applied to the analysis of such systems. To facilitate the analysis of such systems, the transmission cable model needs to be linearized. In this paper, the Taylor approximation method is proposed based on the analysis of the actual impedance model of transmission cable. Through the analysis of the fitting order of transmission cables of different lengths, it is concluded that the short transmission line uses the low-order fitting model and the long transmission line uses the high-order fitting model. Experiments and simulations verify the correctness of the theory.
引文
[1] JIANG W,HE Z Y,BO Z Q.The overview of research on microgrid protection development[C]// International Conference on Intelligent System Design and Engineering Application,Changsha,2010:692-697.
[2] 吕敬,蔡旭.提高风场柔直并网系统稳定性的控制器参数优化设计[J].中国电机工程学报,2018,38(2):431-443.Lü J,CAI X.Controller parameters optimization design for enhancing the stability of wind farm with VSC-HVDC system [J].Proceedings of the CSEE,2018,38(2):431-443.
[3] BLAABJERG F,TEODORESCU R,LISERRE M,et al.Overview of control and grid synchronization for distributed power generation systems [J].IEEE Transactions on Industrial Electronics,2006,53(5):1398-1409.
[4] WANG X,BLAABJERG F,LISERRE M,et al.An active damper for stabilizing power-electronics-based AC systems [J].IEEE Transactions on Power Electronics,2014,29(7):3318-3329.
[5] 李琼林,李陈莹,庞博,等.谐波对电力电缆损耗的影响分析与计算方法[J].电测与仪表,2015,52(23):34-42.LI Q L,LI C Y,PANG B,et al.Impact analysis and calculation method of harmonic on power cable loss [J].Electrical Measurement & Instrumentation,2015,52(23):34-42.
[6] AGORRETA J L,BORREGA M,LOPEZ J,et al.Modeling and control of n-paralleled grid connected inverters with LCL filter coupled due to grid impedance in PV plants [J].IEEE Transactions on Power Electronics,2011,26(3):770-785.
[7] 孙孝峰,曾健,张芳,等.阻性有源滤波器分频控制位置的选择方案[J].中国电机工程学报,2011,31(28):65-70.SUN X F,ZENG J,ZHANG F,et al.Site selection strategy of discrete frequency resistive active power filter [J].Proceedings of the CSEE,2011,31(28):65-70.
[8] WANG X,BLAABJERG F,LISERRE M.An active damper to suppress multiple resonances with unknown frequencies[C]// IEEE Applied Power Electronics Conference and Exposition-APEC,Fort Worth,TX,USA:2014:2184-2191.
[9] ZHANG S,JIANG S,LU X,et al.Resonance issues and damping techniques for grid-connected inverters with long transmission line [J].IEEE Transactions on Power Electronics,2014,29(1):110-120.
[10] WADA K,FUJITA H,AKAGI H.Considerations of a shunt active filter based on voltage detection for installation on a long distribution feeder [J].IEEE Transactions on Industry Applications,2002,38(4):1123-1130.
[11] 黄玉兰.射频电路理论与设计[M].北京:人民邮电出版社,2008.HUANG Y L.Radio frequency circuit theory and design[M].Beijing:People Post Press,2008.
[2] 吕敬,蔡旭.提高风场柔直并网系统稳定性的控制器参数优化设计[J].中国电机工程学报,2018,38(2):431-443.Lü J,CAI X.Controller parameters optimization design for enhancing the stability of wind farm with VSC-HVDC system [J].Proceedings of the CSEE,2018,38(2):431-443.
[3] BLAABJERG F,TEODORESCU R,LISERRE M,et al.Overview of control and grid synchronization for distributed power generation systems [J].IEEE Transactions on Industrial Electronics,2006,53(5):1398-1409.
[4] WANG X,BLAABJERG F,LISERRE M,et al.An active damper for stabilizing power-electronics-based AC systems [J].IEEE Transactions on Power Electronics,2014,29(7):3318-3329.
[5] 李琼林,李陈莹,庞博,等.谐波对电力电缆损耗的影响分析与计算方法[J].电测与仪表,2015,52(23):34-42.LI Q L,LI C Y,PANG B,et al.Impact analysis and calculation method of harmonic on power cable loss [J].Electrical Measurement & Instrumentation,2015,52(23):34-42.
[6] AGORRETA J L,BORREGA M,LOPEZ J,et al.Modeling and control of n-paralleled grid connected inverters with LCL filter coupled due to grid impedance in PV plants [J].IEEE Transactions on Power Electronics,2011,26(3):770-785.
[7] 孙孝峰,曾健,张芳,等.阻性有源滤波器分频控制位置的选择方案[J].中国电机工程学报,2011,31(28):65-70.SUN X F,ZENG J,ZHANG F,et al.Site selection strategy of discrete frequency resistive active power filter [J].Proceedings of the CSEE,2011,31(28):65-70.
[8] WANG X,BLAABJERG F,LISERRE M.An active damper to suppress multiple resonances with unknown frequencies[C]// IEEE Applied Power Electronics Conference and Exposition-APEC,Fort Worth,TX,USA:2014:2184-2191.
[9] ZHANG S,JIANG S,LU X,et al.Resonance issues and damping techniques for grid-connected inverters with long transmission line [J].IEEE Transactions on Power Electronics,2014,29(1):110-120.
[10] WADA K,FUJITA H,AKAGI H.Considerations of a shunt active filter based on voltage detection for installation on a long distribution feeder [J].IEEE Transactions on Industry Applications,2002,38(4):1123-1130.
[11] 黄玉兰.射频电路理论与设计[M].北京:人民邮电出版社,2008.HUANG Y L.Radio frequency circuit theory and design[M].Beijing:People Post Press,2008.
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