基于多层控制的微电网运行模式无缝切换策略
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摘要
以浙江省温州市鹿西岛并网型微电网工程为实例,首先介绍了基于IEC 61850标准的微电网三层控制体系。然后,重点分析了并网高压快速开关及储能变流器的运行控制特性,并对储能变流器由功率控制转换到电压幅值—频率控制时的控制逻辑进行了改进,使其更适应系统运行模式切换的要求。通过微电网中央控制器和模式控制器的配合,尽量减小模式切换过程中由于功率不匹配带来的暂态冲击,成功实现了运行模式的无缝切换。最后,通过实际工程的现场测试,确定了策略中涉及的关键时间定值,最终实现了系统运行模式的无缝切换。
On the background of the Luxi Island grid-connected microgrid project,the three-layer control system based on IEC61850 is presented with the emphases on seamless switching strategies.To accommodate the strategies,the converter control logic of energy storage is improved on the switching process between power control mode and voltage/frequency control mode by analyzing the characteristics of fast-switching breaker and converter.And transient surge of unbalance power has reduced by the coordination of microgrid central controller(MGCC)and mode switching controller(MSC).The setting values of coordination time in strategies are determined through field tests to guarantee the seamless switching of operation modes.
On the background of the Luxi Island grid-connected microgrid project,the three-layer control system based on IEC61850 is presented with the emphases on seamless switching strategies.To accommodate the strategies,the converter control logic of energy storage is improved on the switching process between power control mode and voltage/frequency control mode by analyzing the characteristics of fast-switching breaker and converter.And transient surge of unbalance power has reduced by the coordination of microgrid central controller(MGCC)and mode switching controller(MSC).The setting values of coordination time in strategies are determined through field tests to guarantee the seamless switching of operation modes.
引文
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[20]王赞,肖岚,姚志垒.并网独立双模式控制高性能逆变器设计与实现[J].中国电机工程学报,2007,27(1):54-59.WANG Zan,XIAO Lan,YAO Zhilei.Design and implementation of a high performance utility-interactive inverter[J].Proceedings of the CSEE,2007,27(1):54-59.
[2]鲁宗相,王彩霞,闵勇,等.微电网研究综述[J].电力系统自动化,2007,31(19):101-107.LU Zongxiang,WANG Caixia,MIN Yong,et al.Overview on micro-grid research[J].Automation of Electric Power Systems,2007,31(19):101-107.
[3]王成山,肖朝霞,王守相.微电网综合控制与分析[J].电力系统自动化,2008,32(7):98-103.WANG Chengshan,XIAO Zhaoxia,WANG Shouxiang.Synthetical control and analysis of micro-grid[J].Automation of Electric Power Systems,2008,32(7):98-103.
[4]王成山,王守相.分布式发电供能系统若干问题研究[J].电力系统自动化,2008,32(20):1-4.WANG Chengshan,WANG Shouxiang.Study on some key problems related to distributed generation systems[J].Automation of Electric Power Systems,2008,32(20):1-4.
[5]KATIREI F,IRAVANI M R.Power management strategies for a microgrid with multiple distributed generation units[J].IEEE Trans on Power Systems,2006,21(4):1821-1831.
[6]KATIREI F,IRAVANI M R,LEHN P W.Micro-grid autonomous operation during and subsequent to islanding process[J].IEEE Trans on Power Delivery,2005,20(1):248-257.
[7]徐瑞林,徐鑫,郑永伟.基于改进下垂控制的微网运行控制策略[J].电力系统及其自动化学报,2012,24(6):14-19.XU Ruilin,XU Xin,ZHENG Yongwei.Improved droop control scheme for micro-grid operation[J].Proceedings of the CSUEPSA,2012,24(6):14-19.
[8]王鹤,李国庆.含多种分布式电源的微电网控制策略[J].电力自动化设备,2012,32(5):19-23.WANG He,LI Guoqing.Control strategy of microgrid with different DG types[J].Electric Power Automation Equipment,2012,32(5):19-23.
[9]高晓芝,李林川,张蕾.含电压源型逆变器和同步电机接口的微网控制[J].电力系统保护与控制,2012,40(23):145-150.GAO Xiaozhi,LI Linchuan,ZHANG Lei.Microgrid control with voltage source inverter interface and synchronous generator interface[J].Power System Protection and Control,2012,40(23):145-150.
[10]王成山,高菲,李鹏,等.低压微网控制策略研究[J].中国电机工程学报,2012,32(25):2-8.WANG Chengshan,GAO Fei,LI Peng,et al.Control strategy research on low voltage microgrid[J].Proceedings of the CSEE,2012,32(25):2-8.
[11]郜登科,姜建国,张宇华.使用电压-相角下垂控制的微电网控制策略设计[J].电力系统自动化,2012,36(5):29-34.GAO Dengke,JIANG Jianguo,ZHANG Yuhua.Design of microgrid control strategy using voltage amplitude and phase angle droop control[J].Automation of Electric Power Systems,2012,36(5):29-34.
[12]郑竞宏,王燕廷,李兴旺,等.微电网平滑切换控制方法及策略[J].电力系统自动化,2011,35(18):17-24.ZHENG Jinghong,WANG Yanting,LI Xingwang,et al.Control methods and strategies of microgrid smooth switchover[J].Automation of Electric Power Systems,2011,35(18):17-24.
[13]WANG Chengshan,LI Xialin,GUO Li,et al.A seamless operation mode transition control strategy for a microgrid based on master-slave control[J].Science China(Technological Sciences),2012,55(6):1644-1654.
[14]张纯,陈民铀,王振存.微网运行模式平滑切换的控制策略研究[J].电力系统保护与控制,2011,39(20):1-5.ZHANG Chun,CHEN Minyou,WANG Zhencun.Study on control scheme for smooth transition of micro-grid operation modes[J].Power System Protection and Control,2011,39(20):1-5.
[15]刘志文,夏文波,刘明波.基于复合储能的微电网运行模式平滑切换控制[J].电网技术,2013,37(4):906-913.LIU Zhiwen,XIA Wenbo,LIU Mingbo.Control method and strategy for smooth switching of microgrid operation modes based on complex energy storage[J].Power System Technology,2013,37(4):906-913.
[16]赵冬梅,张楠,刘燕华,等.基于储能的微网并网和孤岛运行模式平滑切换综合控制策略[J].电网技术,2013,37(2):301-306.ZHAO Dongmei,ZHANG Nan,LIU Yanhua,et al.Synthetical control strategy for smooth switching between gridconnected and islanded operation modes of microgrid based on energy storage system[J].Power System Technology,2013,37(2):301-306.
[17]北京四方华能电气设备有限公司.永磁断路器的快速操动机构:中国,CN201478216U[P].2010-05-19.
[18]IEC 61850 Communication networks and systems in substations[S].2004.
[19]王成山,肖朝霞,王守相.微网中分布式电源逆变器的多环反馈控制策略[J].电工技术学报,2009,24(2):100-107.WANG Chengshan,XIAO Zhaoxia,WANG Shouxiang.Multiple feedback loop control scheme for inverters of the micro source in microgrids[J].Transactions of China Electrotechnical Society,2009,24(2):100-107.
[20]王赞,肖岚,姚志垒.并网独立双模式控制高性能逆变器设计与实现[J].中国电机工程学报,2007,27(1):54-59.WANG Zan,XIAO Lan,YAO Zhilei.Design and implementation of a high performance utility-interactive inverter[J].Proceedings of the CSEE,2007,27(1):54-59.