应用变压器集成滤波技术的光伏并网系统电能质量治理方法
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摘要
为满足光伏并网电能质量要求,该文介绍一种基于等变压器集成滤波技术的光伏并网系统电能质量治理方法。该光伏并网系统包含一、二级滤波站的层级构架,具有滤波器与变压器模块化设计、并网点谐波谐振风险低等特点。首先介绍了新型光伏电站的层级结构;分别建立两级滤波站的效电路和数学模型,分析集成电抗器与供电绕组间的弱耦合对一级滤波站滤波性能的影响,进一步揭示说明感应滤波变压器在内外部参数扰动条件下具备谐波谐振抑制的优越性能。最后,对该光伏电站工程实例进行现场测试,结果表明由该两级滤波站构成的光伏并网系统具有低谐波排放和系统运行稳定等特点。
This paper presented a new solution of power quality management for the photovoltaic(PV) power plant with the transformer integrated filtering method. The PV plant has the hierarchical structure of two-stage filtering stations. Its merits include the modular design of the transformer and the passive filter, and low risk of harmonic resonance at the point of common coupling. The hierarchical structure of the PV plant was introduced firstly. The equivalent circuit model and the mathematical model of the primary and the secondary filtering stations were then established. The influence of the weak coupling of integrated reactors on the filtering performance was analyzed. The antijamming capabilities of the inductive filtering method and the traditional method were compared based on the condition of parameter disturbance. At last, the site tests of the new PV plant were conducted, which shows that the PV grid-connected system composed by the two-stage filtering station has the characteristics of low harmonic emission, high power factor and stable operation.
This paper presented a new solution of power quality management for the photovoltaic(PV) power plant with the transformer integrated filtering method. The PV plant has the hierarchical structure of two-stage filtering stations. Its merits include the modular design of the transformer and the passive filter, and low risk of harmonic resonance at the point of common coupling. The hierarchical structure of the PV plant was introduced firstly. The equivalent circuit model and the mathematical model of the primary and the secondary filtering stations were then established. The influence of the weak coupling of integrated reactors on the filtering performance was analyzed. The antijamming capabilities of the inductive filtering method and the traditional method were compared based on the condition of parameter disturbance. At last, the site tests of the new PV plant were conducted, which shows that the PV grid-connected system composed by the two-stage filtering station has the characteristics of low harmonic emission, high power factor and stable operation.
引文
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[13]Muhammad I H,Awang J,Makbul A.Photovoltaic plant with reduced output current harmonics using generationside active power conditioner[J].IET Renewable Power Generation,2014,8(7):817-826.
[14]聂程,王跃,雷万钧,等.新能源并网输电电缆谐波谐振分析及抑制方法[J].电力系统自动化,2017,41(17):128-133.Nie Cheng,Wang Yue,Lei Wanjun,et al.Harmonic resonance analysis and suppression method for transmission cables between renewable energy sources and power grid[J].Automation of Electric Power Systems,2017,41(17):128-133(in Chinese).
[15]Peng Y,Li Y,Xu Z.Power quality improvement and LVRT capability enhancement of wind farms by means of an inductive filtering method[J].Energies,2016,9(302):1-18.
[16]李勇,罗隆福,张志文,等.应用感应滤波原理构建的直流供电系统[J].中国电机工程学报,2010,30(22):107-112.Li Yong,Luo Longfu,Zhang Zhiwen,et al.A dc power supply system developed with inductive filtering method[J].Proceedings of the CSEE,2010,30(22):107-112(in Chinese).
[17]刘乾易,李勇,胡斯佳,等.电力感应调控滤波系统滤波机理与运行特性分析[J].电工技术学报,2018,33(14):3274-3282.Liu Qianyi,Li Yong,Hu Sijia,et al.Study on filtering mechanism and operating characteristic of the controllably inductive power filtering system[J].Transactions of China Electrotechnical Society,2018,33(14):3274-3282(in Chinese).
[18]王灿,罗隆福,陈跃辉,等.一种具有滤波功能的磁集成式10kV箱式变电站[J].电工技术学报,2016,31(10):222-230.Wang Can,Luo Longfu,Chen Yuehui,et al.Amagnetic-integrated 10kV prefabricated substation with function of filtering[J].Transactions of China Electrotechnical Society,2016,31(10):222-230(in Chinese).
[19]廖闻迪,罗隆福,朱军,等.非正交解耦理论与集成于整流变压器的线性电抗器[J].中国电机工程学报,2015,35(13):3417-3425.Liao Wendi,Luo Longfu,Zhu Jun,et al.Non-orthogonal decoupling theory and linear reactor integrated in the rectifier transformer[J].Proceedings of the CSEE,2015,35(13):3417-3425(in Chinese).
[20]中华人民共和国国家技术监督局.GB/T 14549-1993,电能质量公用电网谐波[S].北京:中国标准出版社,1993.State Bureau of Technical Supervision.Quality of electric energy supply harmonics in public supply network[S].Beijing:China Standards Press,1993.
[2]朱晓娟,胡海涛,陶海东,等.光伏并网系统的谐波不稳定产生机理及影响规律[J].电工技术学报,2017,32(10):33-41.Zhu Xiaojuan,Hu Haitao,Tao Haidong,et al.The mechanism and influence of harmonic instability for photovoltaic grid-connected system[J].Transactions of China Electrotechnical Society,2017,32(10):33-41(in Chinese).
[3]高长伟,刘晓明,陈海,等.光伏市电互补系统建模及其运行特性[J].电工技术学报,2017,32(5):200-207.Gao Changwei,Liu Xiaoming,Chen Hai,et al.Modelling and operation characteristics of photovoltaic-grid complementary system[J].Transactions of China Electrotechnical Society,2017,32(5):200-207(in Chinese).
[4]Eduard B,Ricard F,Mònica A,et al.Power plant control in large-scale photovoltaic plants:design,implementation and validation in a 9.4MW photovoltaic plant[J].IETRenewable Power Generation,2016,10(1):50-62.
[5]解玖霞.基于改进FBD算法的光伏并网电能质量研究[J].电气技术,2017(8):69-73.Xie Jiuxia.Research of photovoltaic(PV)grid power quality based on the improved FBD algorithm[J].Electrical Engineering,2017(8):69-73(in Chinese).
[6]谢宁,罗安,陈燕东,等.大型光伏电站动态建模及谐波特性分析[J].中国电机工程学报,2013,33(36):10-17.Xie Ning,Luo An,Chen Yandong,et al.Dynamic modeling and characteristic analysis on harmonics of photovoltaic power stations[J].Proceedings of the CSEE,2013,33(36):10-17(in Chinese).
[7]许德志,汪飞,阮毅,等.LCL、LLCL和LLCCL滤波器无源阻尼分析[J].中国电机工程学报,2015,35(18):4725-4735.Xu Dezhi,Wang Fei,Ruan Yi,et al.Passive damping of LCL,LLCL and LLCCL filters[J].Proceedings of the CSEE,2015,35(18):4725-4735(in Chinese).
[8]Hu H,Shi Q,He Z,et al.Potential harmonic resonance impacts of PV inverter filters on distribution systems[J].IEEE Transactions on Sustainable Energy,2015,6(1):151-161.
[9]曹东莉,袁越,竺林,等.风电场中电力无源滤波器设计与优化[J].电网与清洁能源,2009,25(6):53-57.Cao Dongli,Yuan Yue,Zhu Lin,et al.Design and optimization of power passive filter in wind farm[J].Power System and Clean Energy,2009,25(6):53-57(in Chinese).
[10]谢宁,罗安,马伏军,等.大型光伏电站与电网谐波交互影响[J].中国电机工程学报,2013,33(34):9-16.Xie Ning,Luo An,Chen Yandong,et al.Harmonic interaction between large-scale photovoltaic power stations and grid[J].Proceedings of the CSEE,2013,33(34):9-16(in Chinese).
[11]郑晨,周林,解宝,等.基于相位裕度补偿的大型光伏电站谐波谐振抑制策略[J].电工技术学报,2016,31(19):85-96.Zhen Chen,Zhou Lin,Xie Bao,et al.The harmonic resonance suppression strategy of large-scale photovoltaic plants based on phase margin compensation[J].Transactions of China Electrotechnical Society,2016,31(19):85-96(in Chinese).
[12]Miguel C,Jaume M,Antonio C,et al.Reduction of current harmonic distortion in three-phase grid-connected photovoltaic inverters via resonant current control非曲直[J].IEEE Transactions on Industrial Electronics,2013,60(4):1464-1472.
[13]Muhammad I H,Awang J,Makbul A.Photovoltaic plant with reduced output current harmonics using generationside active power conditioner[J].IET Renewable Power Generation,2014,8(7):817-826.
[14]聂程,王跃,雷万钧,等.新能源并网输电电缆谐波谐振分析及抑制方法[J].电力系统自动化,2017,41(17):128-133.Nie Cheng,Wang Yue,Lei Wanjun,et al.Harmonic resonance analysis and suppression method for transmission cables between renewable energy sources and power grid[J].Automation of Electric Power Systems,2017,41(17):128-133(in Chinese).
[15]Peng Y,Li Y,Xu Z.Power quality improvement and LVRT capability enhancement of wind farms by means of an inductive filtering method[J].Energies,2016,9(302):1-18.
[16]李勇,罗隆福,张志文,等.应用感应滤波原理构建的直流供电系统[J].中国电机工程学报,2010,30(22):107-112.Li Yong,Luo Longfu,Zhang Zhiwen,et al.A dc power supply system developed with inductive filtering method[J].Proceedings of the CSEE,2010,30(22):107-112(in Chinese).
[17]刘乾易,李勇,胡斯佳,等.电力感应调控滤波系统滤波机理与运行特性分析[J].电工技术学报,2018,33(14):3274-3282.Liu Qianyi,Li Yong,Hu Sijia,et al.Study on filtering mechanism and operating characteristic of the controllably inductive power filtering system[J].Transactions of China Electrotechnical Society,2018,33(14):3274-3282(in Chinese).
[18]王灿,罗隆福,陈跃辉,等.一种具有滤波功能的磁集成式10kV箱式变电站[J].电工技术学报,2016,31(10):222-230.Wang Can,Luo Longfu,Chen Yuehui,et al.Amagnetic-integrated 10kV prefabricated substation with function of filtering[J].Transactions of China Electrotechnical Society,2016,31(10):222-230(in Chinese).
[19]廖闻迪,罗隆福,朱军,等.非正交解耦理论与集成于整流变压器的线性电抗器[J].中国电机工程学报,2015,35(13):3417-3425.Liao Wendi,Luo Longfu,Zhu Jun,et al.Non-orthogonal decoupling theory and linear reactor integrated in the rectifier transformer[J].Proceedings of the CSEE,2015,35(13):3417-3425(in Chinese).
[20]中华人民共和国国家技术监督局.GB/T 14549-1993,电能质量公用电网谐波[S].北京:中国标准出版社,1993.State Bureau of Technical Supervision.Quality of electric energy supply harmonics in public supply network[S].Beijing:China Standards Press,1993.