交直流混合微电网微元建模与控制
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摘要
随着直流负荷的增多,传统的交流微电网已经不能满足系统负载多样性及经济性等方面的需求,交直流混合微电网逐步成为研究热点和难点。仿真研究中,分布式发电(Distributed Generation,DG)的随机性、时变性和非线性化特性,使得混合微电网中DG的建模和算法实现比较困难,DG与储能之间的协调控制亦是一个难题。为此,基于实际工程需求搭建了一种包含直流大电网的交直流混合微电网的系统结构,提出了相应元件的物理模型与控制策略,并在仿真平台下着重模拟了各微元在不同工况下的协同运行。仿真结果表明,所提出的交直流混合微电网结构合理,各元件的控制策略和性能良好,且整个系统具有较快的响应速度,很好地满足了系统安全稳定性要求。
With the increasing of DC loads, the traditional AC micro-grids can not meet the demands of system load diversity and economy. Hybrid AC/DC micro-grid gradually becomes a research hotspot. In the simulation study, the random, time-varying and nonlinear characteristics of the Distributed Generation(DG) make the DG modeling, algorithm realization and the coordination and cooperation between DG and energy storage relatively complex in hybrid micro-grid. Based on engineering application requirements, a hybrid AC/DC micro-grid system containing the DC distribution grid is built. Furthermore, the physical models and control strategies of the corresponding micro components are proposed. Finally, this paper mainly focuses on the simulation of micro components under different working conditions. The simulation results show that the proposed hybrid AC/DC micro-grid structure is reasonable, and the control strategies and performance of the components are good. The whole system has fast response speed, and can well satisfy the requirements of system security and stability.
With the increasing of DC loads, the traditional AC micro-grids can not meet the demands of system load diversity and economy. Hybrid AC/DC micro-grid gradually becomes a research hotspot. In the simulation study, the random, time-varying and nonlinear characteristics of the Distributed Generation(DG) make the DG modeling, algorithm realization and the coordination and cooperation between DG and energy storage relatively complex in hybrid micro-grid. Based on engineering application requirements, a hybrid AC/DC micro-grid system containing the DC distribution grid is built. Furthermore, the physical models and control strategies of the corresponding micro components are proposed. Finally, this paper mainly focuses on the simulation of micro components under different working conditions. The simulation results show that the proposed hybrid AC/DC micro-grid structure is reasonable, and the control strategies and performance of the components are good. The whole system has fast response speed, and can well satisfy the requirements of system security and stability.
引文
[1]田世明,栾文鹏,张冬霞,等.能源互联网技术形态与关键技术[J].中国电机工程学报,2015,35(14):3482-3494.TIAN Shiming,LUAN Wenpeng,ZHANG Dongxia,et al.Technical forms and key technologies on energy internet[J].Proceedings of the CSEE,2015,35(14):3482-3494.
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[10]丁明,田龙刚,张雪松,等.交直流混合微电网运行控制策略研究[J].电力系统保护与控制,2015,43(9):101-105.DING Ming,TIAN Longgang,ZHANG Xuesong,et al.Research on control strategy of hybrid AC&DC microgrid[J].Power System Protection and control,2015,43(9):101-105.
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[14]马钊,周孝信,尚宇炜,等.未来配电系统形态及发展趋势[J].中国电机工程学报,2015,35(6):1289-1298.MA Zhao,ZHOU Xiaoxin,SHANG Yuwei,et al.Form and development trend of future distribution system[J].Proceedings of the CSEE,2015,35(6):1289-1298.
[15]LASSETER R H.Microgrids and distributed generation[J].Intelligent Automation&Soft Computing,2010,16(2):225-234.
[2]王成山,李鹏.分布式发电、微网与智能配电网的发展与挑战[J].电力系统自动化,2010,34(2):10-14,23.WANG Chengshan,LI Peng.Development and challenges of distributed generation,the micro-grid and smart distribution system[J].Automation of Electric Power Systems,2010,34(2):10-14,23.
[3]张丹,王杰.国内微电网项目建设及发展趋势研究[J].电网技术,2016,40(2):451-458.ZHANG Dan,WANG Jie.Research on construction and development trend of micro-grid in China[J].Power System Technology,2016,40(2):451-458.
[4]李献伟,李保恩,王鹏.微电网技术现状及未来发展分析[J].通讯电源技术,2015,32(5):202-207.LI Xianwei,LI Baoen,WANG Peng.The technical status and development tendency of micro-grid[J].Telecom Power Technologies,2015,32(5):202-207.
[5]刘舒,李正力,王翼,等.含分布式发电的微电网中储能装置容量优化配置[J].电力系统保护与控制,2016,44(3):78-84.LIU Shu,LI Zhengli,WANG Yi,et al.Optimal capacity allocation of energy storage in micro-grid with distributed generation[J].Power System Protection and Control,2016,44(3):78-84.
[6]李瑞生.微电网关键技术实践及实验[J].电力系统保护与控制,2013,41(2):73-78.LI Ruisheng.Practice and experiment of the key micro-grid technologies[J].Power System Protection and Control,2013,41(2):73-78.
[7]陈丽娟,王致杰.基于改进下垂控制的微电网运行控制研究[J].电力系统保护与控制,2016,44(4):16-21.CHEN Lijuan,WANG Zhijie.Research of operation control of micro-grid based on improved droop control[J].Power System Protection and Control,2016,44(4):16-21.
[8]冯庆东.分布式发电及微网相关问题研究[J].电测与仪表,2013,50(2):99-104.FENG Qingdong.A review of the state of the art of distributed generation and micro grid[J].Electrical Measurement&Instrumentation,2013,50(2):99-104.
[9]殷晓刚,戴冬云,韩云,等.交直流混合微电网关键技术研究[J].高压电器,2012,48(9):87-92.YIN Xiaogang,DAI Dongyun,HAN Yun,et al.Discussion on key technologies of AC-DC hybrid micro-grid[J].High Voltage Apparatus,2012,48(9):87-92.
[10]丁明,田龙刚,张雪松,等.交直流混合微电网运行控制策略研究[J].电力系统保护与控制,2015,43(9):101-105.DING Ming,TIAN Longgang,ZHANG Xuesong,et al.Research on control strategy of hybrid AC&DC microgrid[J].Power System Protection and control,2015,43(9):101-105.
[11]NUNNA K,DOOLLA S.Multi agent based distributed energy resource management for intelligent micro-grids[J].IEEE Transactions on Industrial Electronics,2012,60(4):1678-1687.
[12]GUO Wenming,MU Longhua.Control principles of micro-source inverters used in microgrid[J].Protection and Control of Modern Power Systems,2016,1:7pp.DOI 10.1186/s41601-016-0019-8
[13]BRACALE A,CARAMIAA P,CARPINELLI G,et al.A hybrid AC/DC smart grid to improve power quality and reliability[C]//Energy Conference and Exhibition,2012:507-514.
[14]马钊,周孝信,尚宇炜,等.未来配电系统形态及发展趋势[J].中国电机工程学报,2015,35(6):1289-1298.MA Zhao,ZHOU Xiaoxin,SHANG Yuwei,et al.Form and development trend of future distribution system[J].Proceedings of the CSEE,2015,35(6):1289-1298.
[15]LASSETER R H.Microgrids and distributed generation[J].Intelligent Automation&Soft Computing,2010,16(2):225-234.