基于自适应参数虚拟同步机的微电网稳定控制
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摘要
随着分布式发电技术与微电网技术的快速发展,现代电力系统尤其是微网中的电力电子化程度越来越高。微电网中电力电子变流器因缺乏必要的惯性和阻尼成分,从而影响到系统稳定。针对此问题,文章通过模拟传统同步机转子方程,基于下垂控制添加虚拟惯性和阻尼,搭建了用于逆变器控制的虚拟同步机控制模型;研究了惯性和阻尼参数对虚拟同步稳定控制效果的影响,进而通过设计合理的触发机制提出了自适应参数虚拟同步控制策略,可根据控制需求灵活切换自适应参数调整模式。最后的仿真验证和对比分析表明,所提策略一定程度上有利于增强系统的频率和功率稳定。
With the rapid development of the distributed generation technology and microgrid technology,more and more power electronic devices are used in modern power system especially in microgrids. Meanwhile,power electronic converters in microgrid may affect the stability of the system due to lack of necessary inertia and damping. To deal with the problem,this paper,by simulating the traditional synchronous machine rotor equation,equips the droop control with virtual inertia and damping to set up a virtual synchronous generator control model for inverter control. Next,the influence of inertia and damping parameters on the control stability of the virtual synchronous generator is studied. By designing reasonable trigger mechanism,the virtual synchronous generator control strategy with adaptive parameters is put forward,which can flexibly switch adaptive parameter adjustment mode according to control requirements. At last,simulation result and comparative analysis showthat the proposed strategy is beneficial to enhance the frequency and power stability of the system to a certain extent.
With the rapid development of the distributed generation technology and microgrid technology,more and more power electronic devices are used in modern power system especially in microgrids. Meanwhile,power electronic converters in microgrid may affect the stability of the system due to lack of necessary inertia and damping. To deal with the problem,this paper,by simulating the traditional synchronous machine rotor equation,equips the droop control with virtual inertia and damping to set up a virtual synchronous generator control model for inverter control. Next,the influence of inertia and damping parameters on the control stability of the virtual synchronous generator is studied. By designing reasonable trigger mechanism,the virtual synchronous generator control strategy with adaptive parameters is put forward,which can flexibly switch adaptive parameter adjustment mode according to control requirements. At last,simulation result and comparative analysis showthat the proposed strategy is beneficial to enhance the frequency and power stability of the system to a certain extent.
引文
[1]周孝信,陈树勇,鲁宗相.电网和电网技术发展的回顾与展望:试论三代电网[J].中国电机工程学报,2013,33(22):1-11.ZHOU Xiaoxin,CHEN Shuyong,LU Zongxiang.Review and prospect for pow er system development and related technologies:Aconcept of three-generation pow er systems[J].Proceedings of the CSEE,2013,33(22):1-11.
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[3]杨新法,苏剑,吕志鹏,等.微电网技术综述[J].中国电机工程学报,2014,34(1):57-70.YANG Xinfa,SU Jian,LZhipeng,et al.Overview on micro-grid technology[J].Proceedings of the CSEE,2014,34(1):57-70.
[4]范明天,张祖平,苏傲雪,等.主动配电系统可行技术的研究[J].中国电机工程学报,2013,33(22):12-18.FAN M ingtian,ZHANG Zuping,SU Aoxue,et al.Enabling technologies for active distribution systems[J].Proceedings of the CSEE,2013,33(22):12-18.
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[8]BECK H P,HESSE R.Virtual synchronous machine[C]//International Conference on Electrical Pow er Quality and Utilisation.IEEE,2007:1-6.
[9]丁明,杨向真,苏建徽.基于虚拟同步发电机思想的微电网逆变电源控制策略[J].电力系统自动化,2009,33(8):89-93.DING M ing,YANG Xiangzhen,SU Jianhui.Control strategies of inverters based on virtual synchronous generator in microgrid[J].Automation of Electric Pow er Systems,2009,33(8):89-93.
[10]SAKIMOTO K,MIURA Y,ISE T.Stabilization of a power system w ith a distributed generator by a virtual synchronous generator function[C]//IEEE,International Conference on Pow er Electronics and Ecce Asia.IEEE,2011:1498-1505.
[11]吕志鹏,盛万兴,钟庆昌,等.虚拟同步发电机及其在微电网中的应用[J].中国电机工程学报,2014,34(16):2591-2603.LZhipeng,SHENG Wanxing,ZHONG Qingchang,et al.Virtual synchronous generator and its applications in micro-grid[J].Proceedings of the CSEE,2014,34(16):2591-2603.
[12]郑天文,陈来军,陈天一,等.虚拟同步发电机技术及展望[J].电力系统自动化,2015,39(21):165-175.ZHENG Tianw en,CHEN Laijun,CHEN Tianyi,et al.Review and prospect of virtual synchronous generator technologies[J].Automation of Electric Pow er Systems,2015,39(21):165-175.
[13]ZHONG Q C,WEISS G.Synchronverters:Inverters that mimic synchronous generators[J].IEEE Transactions on Industrial Electronics,2011,58(4):1259-1267.
[14]邹培根,孟建辉,王毅,等.灵活虚拟同步机主要控制参数对系统频率稳定性的影响分析[J].高电压技术,2018,44(4):1335-1342.ZOU Peigen,M ENG Jianhui,WANG Yi,et al.Influence analysis of the main control parameters in FVSG on the frequency stability of the system[J].High Voltage Engineering,2018,44(4):1335-1342.
[15]宋琼,张辉,孙凯,等.多微源独立微网中虚拟同步发电机的改进型转动惯量自适应控制[J].中国电机工程学报,2017,37(2):412-424.SONG Qiong,ZHANG Hui,SUN Kai,et al.Adaptive control of inertia for virtual synchronous generators in islanding micro-grid w ith multiple distributed generation units[J].Proceedings of the CSEE,2017,37(2):412-424.
[16]ALIPOOR J,MIURA Y,ISE T.Power system stabilization using virtual synchronous generator w ith alternating moment of inertia[J].IEEE Journal of Emerging and Selected Topics in Power Electronics,2015,3(2):451-458.
[17]SALVATORE D A,JON A S,OLAV B F.A virtual synchronous machine implementation for distributed control of pow er converters insmartgrids[J].Electric Pow er Systems Research,2015,122:180-197.
[18]孟建辉.分布式电源的虚拟同步发电机控制技术研究[D].保定:华北电力大学,2015.M ENG Jianhui.Control strategy of virtual synchronous generator for distributed generation[D].Baoding:North China Electric Pow er University,2015.
[2]LASSETER R H.Microgrids and distributed generation[J].Journal of Energy Engineering,2007,133(3):144-149.
[3]杨新法,苏剑,吕志鹏,等.微电网技术综述[J].中国电机工程学报,2014,34(1):57-70.YANG Xinfa,SU Jian,LZhipeng,et al.Overview on micro-grid technology[J].Proceedings of the CSEE,2014,34(1):57-70.
[4]范明天,张祖平,苏傲雪,等.主动配电系统可行技术的研究[J].中国电机工程学报,2013,33(22):12-18.FAN M ingtian,ZHANG Zuping,SU Aoxue,et al.Enabling technologies for active distribution systems[J].Proceedings of the CSEE,2013,33(22):12-18.
[5]BORGES C L T,MARTINS V F.Multistage expansion planning for active distribution netw orks under demand and distributed generation uncertainties[J].Electrical Pow er and Energy Systems,2012,36:107-116.
[6]吴云亚,阚加荣,谢少军.基于双d-q坐标系的并网逆变器控制策略[J].电工技术学报,2011,26(8):106-112.WU Yunya,KAN Jiarong,XIE Shaojun.Control strategy for gridconnected inverter based on double d-q coordinates[J].Transactions of China Electrotechnical Society,2011,26(8):106-112.
[7]顾和荣,赵巍,王雷,等.微电网逆变器电流下垂控制分析与实验研究[J].电力系统保护与控制,2013,41(18):45-48.GU Herong,ZHAO Wei,WANG Lei,et al.Analysis and experimental verification of current droop control for microgrid inverters[J].Pow er System Protection and Control,2013,41(18):45-48.
[8]BECK H P,HESSE R.Virtual synchronous machine[C]//International Conference on Electrical Pow er Quality and Utilisation.IEEE,2007:1-6.
[9]丁明,杨向真,苏建徽.基于虚拟同步发电机思想的微电网逆变电源控制策略[J].电力系统自动化,2009,33(8):89-93.DING M ing,YANG Xiangzhen,SU Jianhui.Control strategies of inverters based on virtual synchronous generator in microgrid[J].Automation of Electric Pow er Systems,2009,33(8):89-93.
[10]SAKIMOTO K,MIURA Y,ISE T.Stabilization of a power system w ith a distributed generator by a virtual synchronous generator function[C]//IEEE,International Conference on Pow er Electronics and Ecce Asia.IEEE,2011:1498-1505.
[11]吕志鹏,盛万兴,钟庆昌,等.虚拟同步发电机及其在微电网中的应用[J].中国电机工程学报,2014,34(16):2591-2603.LZhipeng,SHENG Wanxing,ZHONG Qingchang,et al.Virtual synchronous generator and its applications in micro-grid[J].Proceedings of the CSEE,2014,34(16):2591-2603.
[12]郑天文,陈来军,陈天一,等.虚拟同步发电机技术及展望[J].电力系统自动化,2015,39(21):165-175.ZHENG Tianw en,CHEN Laijun,CHEN Tianyi,et al.Review and prospect of virtual synchronous generator technologies[J].Automation of Electric Pow er Systems,2015,39(21):165-175.
[13]ZHONG Q C,WEISS G.Synchronverters:Inverters that mimic synchronous generators[J].IEEE Transactions on Industrial Electronics,2011,58(4):1259-1267.
[14]邹培根,孟建辉,王毅,等.灵活虚拟同步机主要控制参数对系统频率稳定性的影响分析[J].高电压技术,2018,44(4):1335-1342.ZOU Peigen,M ENG Jianhui,WANG Yi,et al.Influence analysis of the main control parameters in FVSG on the frequency stability of the system[J].High Voltage Engineering,2018,44(4):1335-1342.
[15]宋琼,张辉,孙凯,等.多微源独立微网中虚拟同步发电机的改进型转动惯量自适应控制[J].中国电机工程学报,2017,37(2):412-424.SONG Qiong,ZHANG Hui,SUN Kai,et al.Adaptive control of inertia for virtual synchronous generators in islanding micro-grid w ith multiple distributed generation units[J].Proceedings of the CSEE,2017,37(2):412-424.
[16]ALIPOOR J,MIURA Y,ISE T.Power system stabilization using virtual synchronous generator w ith alternating moment of inertia[J].IEEE Journal of Emerging and Selected Topics in Power Electronics,2015,3(2):451-458.
[17]SALVATORE D A,JON A S,OLAV B F.A virtual synchronous machine implementation for distributed control of pow er converters insmartgrids[J].Electric Pow er Systems Research,2015,122:180-197.
[18]孟建辉.分布式电源的虚拟同步发电机控制技术研究[D].保定:华北电力大学,2015.M ENG Jianhui.Control strategy of virtual synchronous generator for distributed generation[D].Baoding:North China Electric Pow er University,2015.
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