高压微网运行模式切换控制策略

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (1196 KB)
输出: BibTeX | EndNote (RIS)

摘要以未来可再生电能传输和管理（FREEDM）网络为研究对象,提出一种新型电压模式控制策略,用于实现FREEDM网络联网与孤岛模式间的切换。由于始终将并网逆变器控制为电压源,因此避免了运行模式变化时控制策略的切换,并采用改进的相角下垂控制取代传统频率下垂控制,使微网频率与输出功率分离,降低切换难度。联网运行时,将功率偏差作为反馈量加入到下垂控制环节,实现逆变器的恒功率输出。重新设计同步调节器,使微网进入联网模式时准同期并网,进入孤岛模式时降低脱网过程对微网的冲击,实现平滑过渡。仿真分析表明,本文所提出的控制策略可实现快速同步调节,切换过程公共连接点处（PCC）冲击电流较小,可以很好地稳定微网电压和频率,并有效抑制微网电源间环流。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	张明锐
	杜志超
	王少波
	孙华

关键词 ：微网, 电压模式控制, 虚拟阻抗, 平滑切换

Abstract：This paper puts forward a novel voltage mode control strategy to realize the smooth transition between the grid-connected and islanded operation mode of future renewable electric energy delivery and management(FREEDM). Because the inverters are controlled to work as voltage sources all the time, the switch of control strategy is avoided. And the improved angle droop control strategy is used instead of conventional frequency droop control to set frequency free from the change of output , which reduces the difficulty of mode transition. The power deviation is added to the droop control block at the grid-connected mode to realize the constant output power control. The synchronization is ensured by employing the redesigned controller, and the integrator is utilized to reduce the impact when separated from conventional grid, thus the smooth transition of operation modes is achieved. Simulation and analysis show the proposed control strategy can realize fast synchronization, reduce the impact current of point of common coupling(PCC) during the mode transition period, steady the voltage and frequency of the microgrid, and also inhibit circulating current effectively.

Key words： Microgrid voltage mode control virtual impedance smooth transition

收稿日期: 2013-07-03 出版日期: 2014-06-18

PACS:

TM732

基金资助:上海市自然科学基金（13ZR1444400）,上海市科委重大专项（13DZ1200403）和中央高校基本科研业务费专项资金（0800219169）资助项目

作者简介: 张明锐男,1971年生,博士,副教授,研究方向为分布式发电与微网、电力系统能量管理与优化运行、轨道交通牵引供电系统。杜志超男,1988年生,硕士研究生,研究方向为分布式电源并网。

引用本文:

张明锐, 杜志超, 王少波, 孙华. 高压微网运行模式切换控制策略[J]. 电工技术学报, 2014, 29(2): 153-162. Zhang Mingrui, Du Zhichao, Wang Shaobo, Sun Hua. Control Strategies of High-Voltage Microgrid for Operation Modes Switching. Transactions of China Electrotechnical Society, 2014, 29(2): 153-162.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2014/V29/I2/153

[1] Huang A Q. Renewable energy system research and education at the NSF FREEDM systems center[C]. 2009 IEEE Power and Energy Society General Meeting, PES’09, Calgary, AB, Canada, 2009, 7: 1-6.
[2] Huang A Q, Crow M L, Heydt G T, et al. The future renewable electric energy delivery and management (FREEDM) system: the energy internet[J]. Proceedings of the IEEE, 2011, 99(1): 133-148.
[3] Jianjiang Shi, Wei Gou, Hao Yuan, et al. Research on voltage and power balance control for cascaded modular solid-state transformer[J]. IEEE Transaction on Power Electronics, 2011, 26(4): 1154-1166.
[4] Xu She, Lukic S, Huang A Q, et al. Performance evaluation of solid state transformer based microgrid in FREEDM system[C]. Applied Power Electronics Conference and Exposition(APEC), 2011 Twenty- Sixth Annual IEEE, Raleigh, NC, USA, 2011, 3: 182-188.
[5] 张明锐, 徐而峰. P-Q模式固态变压器的工作特性分析及实现[J]. 电力自动化设备, 2012, 32(11): 65-71.
Zhang Mingrui, Xu Erfeng. Characteristic analysis and realization of SST operating in P-Q mode[J]. Electric Power Automation Equipment, 2012, 32(11): 65-71.
[6] 张明锐, 杜志超, 黎娜, 等. 高压微网孤岛运行时频率稳定控制策略研究[J]. 中国电机工程学报, 2012, 32(25): 20-26.
Zhang Mingrui, Du Zhichao, Li Na, et al. Control strategies of frequency stability for islanding high- voltage microgrids[J]. Proceedings of the CSEE, 2012, 32(25): 20-26.
[7] 刘海波. 电力电子变压器控制策略研究[D]. 武汉: 华中科技大学, 2009.
[8] 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.
[9] 李涛丰, 汪洪亮, 康勇, 等. 大功率电机直接起动的逆变器控制模式切换策略[J]. 电工技术学报, 2012, 27(6): 69-76.
Li Taofeng, Wang Hongliang, Kang Yong, et al. Control model switching strategy for high-power motor direct staring in inverter[J]. Transactions of China Electrotechnical Society, 2012, 27(6): 69-76.
[10] 刘增, 刘进军. 一种可实现分布式发电系统平滑切换的三相逆变器控制方法[J]. 电工技术学报, 2011, 26(5): 52-61.
Liu Zeng, Liu Jinjun. A control method for 3-phase inverters enabling smooth transferring of the operation modes of distributed generation system[J]. Transactions of China Electrotechnical Society, 2011, 26(5): 52-61.
[11] 蒋冀, 段善旭, 陈仲伟. 三相并网/独立双模式逆变器控制策略研究[J]. 电工技术学报, 2012, 27(2): 52-58.
Jiang Ji, Duan Shanxu, Chen Zhongwei. Research on control strategy for three-phase double mode inverter[J]. Transactions of China Electrotechnical Society, 2012, 27(2): 52-58.
[12] 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.
[13] 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.
[14] Chien-Liang Chen, Yubin Wang, Jih-Sheng Lai, et al. Design of parallel inverters for smooth mode transfer microgrid applications[J]. IEEE Transaction on Power Electronics, 2010, 25(1): 6-15.
[15] Shang-Hung Hu, Chun-Yi Kuo, Tzung-Lin Lee, et al. Droop-controlled inverters with seamless transition between islanding and grid-connected operations[C]. IEEE Energy Conversion Congress and Exposition (ECCE), Phoenix, Arizona, USA, 2011: 2196- 2201.
[16] Fang Gao, Iravani M R. A control strategy for a distributed generation unit in grid-connected and autonomous modes of operation[J]. IEEE Transaction on Power Delivery, 2008, 23(2): 850-859.
[17] 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.
[18] Korkua S K, Kenarangui R. Control strategy for load sharing in distributed generation system in parallel operation[C]. 2010 IEEE Green Technologies Conference, Texas, USA: IEEE, 2010: 1-5.
[19] Liu Ting, Liu Jinjun, Zhang Xuan. A novel power distribution strategy for parallel inverters in islanded mode microgrid[C]. 2010 Twenty-Fifth Annual IEEE Applied Power Elecrtonics Conference and Exposition (APEC), Palm Springs, Califirnia, USA, 2010: 2116- 2120.
[20] Vasquez J C, Guerrero J M, Rodriguez P, et al. Adaptive droop control applied to voltage-source inverters operating in grid-connected and islanded modes[J]. IEEE Transactions on Power Systems, 2009, 56(10): 4088-4096.
[21] Guerrero J M, De Vicuna L G, Matas J, et al. A wireless controller to enhance dynamic performance of parallel inverters in distributed generation systems[J]. IEEE Transaction on Power Systems, 2004, 19(5): 1205-1213.
[22] Majumder R, Chaudhuri B, Ghosh A, et al. Improvement of stability of load sharing in an autonomous microgrid using supplementary droop control loop[J]. IEEE Transaction on Power Systems, 2010, 25(2): 796-808.
[23] Majumder R, Ghosh A, Ledwich G, et al. Angle droop versus frequency droop in a voltage source converter based autonomous microgrid[C]. 2009 IEEE Power and Energy Society General Meeting, Calgary, AB, Canada, 2009, 7: 1-8.