考虑系统延时的微电网有功功率分布式控制策略
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摘要
一致性控制是微电网中应用广泛的一类分布式控制策略。然而,一致性控制依赖于各分布式电源(distributed generator,DG)之间的交互通信,系统中通信延时和控制延时的存在极可能恶化系统性能,甚至造成系统不稳定。分析了通信延时和控制延时对基于一致性的微电网有功分布式控制的影响,提出了一种系统稳定性判据。在此基础上,设计了考虑系统延时影响的微电网一致性有功控制策略。相比传统一致性控制策略,该策略能够保证系统在更大的延时下稳定运行。多种场景下的仿真结果验证了上述分析和所提策略的正确性和有效性。
Distributed consensus-based control methods are widely applied to microgrids. However, these control highly depend on the communication between distributed generators. In the control system, existence of communication and control time delays would significantly affect the system performance and the microgrid stability. This paper analyses the influence of communication and control time delays on consensus-based active power distributed control methods of microgrids, and a stability criterion of time delays is proposed. Moreover, a consensus-based control strategy of microgrids considering the influence of system time delays is designed. The proposed control strategy can stand longer time delays compared to traditional control strategies. Correctness and effectiveness of the strategy proposed in this paper are verified with the simulation results under various conditions.
Distributed consensus-based control methods are widely applied to microgrids. However, these control highly depend on the communication between distributed generators. In the control system, existence of communication and control time delays would significantly affect the system performance and the microgrid stability. This paper analyses the influence of communication and control time delays on consensus-based active power distributed control methods of microgrids, and a stability criterion of time delays is proposed. Moreover, a consensus-based control strategy of microgrids considering the influence of system time delays is designed. The proposed control strategy can stand longer time delays compared to traditional control strategies. Correctness and effectiveness of the strategy proposed in this paper are verified with the simulation results under various conditions.
引文
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[16]Liu S,Wang X,Liu P X.Impact of communication delays on secondary frequency control in an islanded microgrid[J].IEEETransactions on Industrial Electronics,2015,62(4):2021-2031.
[17]吕振宇,吴在军,窦晓波,等.自治直流微电网分布式经济下垂控制策略[J].中国电机工程学报,2016,36(4):900-910.LüZhenyu,Wu Zaijun,Dou Xiaobo,et al.A distributed droop control scheme for islanded DC microgrid considering operation costs[J].Proceedings of the CSEE,2016,36(4):900-910(in Chinese).
[18]Lu X,Chen N,Wang Y,et al.Distributed impulsive control for islanded microgrids with variable communication delays[J].IETControl Theory Applications,2016,10(14):1732-1739.
[19]Lai J,Zhou H,Lu X,et al.Droop-based distributed cooperative control for microgrids with time-varying delays[J].IEEE Transactions on Smart Grid,2016,7(4):1775-1789.
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[21]Avila N F,Chu C.Distributed pinning droop control in isolated ACmicrogrids[J].IEEE Transactions on Industry Applications,2017,53(4):3237-3249.
[22]Zhou Y,Ghosh S,Ali M H,et al.Minimization of negative effects of time delay in smart grid system[C]//2013 Proceedings of IEEESoutheastcon.Jacksonville,FL:IEEE,2013:1-6.
[23]Manaffam S,Talebi M,Jain A K,et al.Intelligent pinning based cooperative secondary control of distributed generators for microgrid in islanding operation mode[J].IEEE Transactions on Power Systems,2018,33(2):1364-1373.
[2]许志荣,杨苹,郑成立,等.孤岛型风柴储微电网运行情况分析[J].电网技术,2016,40(7):1978-1984.Xu Zhirong,Yang Ping,Zheng Chengli,et al.Operation analysis of isolated microgrid including wind turbine,diesel generator and battery storage[J].Power System Technology,2016,40(7):1978-1984(in Chinese).
[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,LüZhipeng,et al.Overview on micro-grid technology[J].Proceedings of the CSEE,2014,34(1):57-70(in Chinese).
[4]Chen L,Mei S.An integrated control and protection system for photovoltaic microgrids[J].CSEE Journal of Power and Energy Systems,2015,1(1):36-42.
[5]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(in Chinese).
[6]金鹏,艾欣,许佳佳.基于序列运算理论的孤立微电网经济运行模型[J].中国电机工程学报,2012,32(25):52-59.Jin Peng,Ai Xin,Xu Jiajia.An economic operation model for isolated microgrid based on sequence operation theory[J].Proceedings of the CSEE,2012,32(25):52-59(in Chinese).
[7]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(in Chinese).
[8]孙孝峰,杨雅麟,赵巍,等.微电网逆变器自适应下垂控制策略[J].电网技术,2014,38(9):2386-2391.Sun Xiaofeng,Yang Yalin,Zhao Wei,et al.An adaptive droop control method for inverters in microgrid[J].Power System Technology,2014,38(9):2386-2391(in Chinese).
[9]艾芊,刘思源,吴任博,等.能源互联网中多代理系统研究现状与前景分析[J].高电压技术,2016,42(9):2697-2706.Ai Qian,Liu Siyuan,Wu Renbo,et al.Research and prospect of multi-agent system in energy internet system[J].High Voltage Engineering,2016,42(9):2697-2706(in Chinese).
[10]赵亦岚,陈彬,范元亮,等.虚拟发电厂分布式控制收敛速度分析及优化[J].电网技术,2016,40(8):2288-2295.Zhao Yilan,Chen Bin,Fan Yuanliang,et al.Convergence speed analysis and optimization for distributed control of virtual power plant[J].Power System Technology,2016,40(8):2288-2295(in Chinese).
[11]Han H,Hou X,Yang J,et al.Review of power sharing control strategies for islanding operation of AC microgrids[J].IEEETransactions on Smart Grid,2016,7(1):200-215.
[12]Han Y,Li H,Shen P,et al.Review of active and reactive power sharing strategies in hierarchical controlled microgrids[J].IEEETransactions on Power Electronics,2017,32(3):2427-2451.
[13]Chen G,Zhao Z.Delay effects on consensus-based distributed economic dispatch algorithm in microgrid[J].IEEE Transactions on Power Systems,2018,33(1):602-612.
[14]吕振宇,吴在军,窦晓波,等.基于离散一致性的孤立直流微网自适应下垂控制[J].中国电机工程学报,2015,35(17):4397-4407.LüZhenyu,Wu Zaijun,Dou Xiaobo,et al.An adaptive droop control for the islanded DC microgrid based on discrete consensus algorithm[J].Proceedings of the CSEE,2015,35(17):4397-4407(in Chinese).
[15]余志文,艾芊.基于多智能体一致性的微电网自适应下垂控制策略[J].电力自动化设备,2017,37(12):150-156.Yu Zhiwen,Ai Qian.Adaptive droop control strategy for microgrid based on consensus of multi-agent system[J].Electric Power Automation Equipment,2017,37(12):150-156(in Chinese).
[16]Liu S,Wang X,Liu P X.Impact of communication delays on secondary frequency control in an islanded microgrid[J].IEEETransactions on Industrial Electronics,2015,62(4):2021-2031.
[17]吕振宇,吴在军,窦晓波,等.自治直流微电网分布式经济下垂控制策略[J].中国电机工程学报,2016,36(4):900-910.LüZhenyu,Wu Zaijun,Dou Xiaobo,et al.A distributed droop control scheme for islanded DC microgrid considering operation costs[J].Proceedings of the CSEE,2016,36(4):900-910(in Chinese).
[18]Lu X,Chen N,Wang Y,et al.Distributed impulsive control for islanded microgrids with variable communication delays[J].IETControl Theory Applications,2016,10(14):1732-1739.
[19]Lai J,Zhou H,Lu X,et al.Droop-based distributed cooperative control for microgrids with time-varying delays[J].IEEE Transactions on Smart Grid,2016,7(4):1775-1789.
[20]Chen G,Guo Z.Distributed secondary and optimal active power sharing control for islanded microgrids with communication delays[J].IEEE Transactions on Smart Grid,2017,PP(99):1.
[21]Avila N F,Chu C.Distributed pinning droop control in isolated ACmicrogrids[J].IEEE Transactions on Industry Applications,2017,53(4):3237-3249.
[22]Zhou Y,Ghosh S,Ali M H,et al.Minimization of negative effects of time delay in smart grid system[C]//2013 Proceedings of IEEESoutheastcon.Jacksonville,FL:IEEE,2013:1-6.
[23]Manaffam S,Talebi M,Jain A K,et al.Intelligent pinning based cooperative secondary control of distributed generators for microgrid in islanding operation mode[J].IEEE Transactions on Power Systems,2018,33(2):1364-1373.