微网逆变器的改进鲁棒下垂多环控制

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摘要对于孤岛模式下的逆变器,其等效输出阻抗和连线阻抗差异对功率分配和环流抑制的影响较大。鲁棒下垂控制虽然可以减小阻抗差异对功率精确分配的影响,但在逆变器投入并联运行过程,存在冲击电流大、过渡时间长的不足,影响鲁棒下垂控制的实用化。为此,以阻性线路阻抗为例,提出一种改进的鲁棒下垂多环控制方法,其由功率外环和电压、电流双环构成。电压、电流双环设计中,采用考虑负载影响的控制器参数设计方法,抑制负载变化对电容电流内环跟踪性能的不利影响。功率外环通过引入阻性虚拟阻抗将逆变器的等效输出阻抗设计成阻性,提出一种改进的鲁棒下垂控制方法,与常规鲁棒下垂控制相比,可以改善逆变器的并机过程,减小并机冲击电流,加快并机过渡过程,实现平滑快速并机过渡。仿真与实验结果表明了所提理论的正确性和有效性。

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	王逸超
	罗安
	金国彬

关键词 ：电容电流内环, 电压、电流双环控制, 改进鲁棒下垂控制, 并机过渡过程

Abstract：For parallel multi-inverters in island microgrid, the difference of equivalent output impedance and line impedance effects greatly on power sharing and circulating current restraining greatly. Robust droop control can reduce the impacts on accurate power sharing due to the impedance difference. But there are large impact current and long transition time in the start transition process, which hinder the actual engineering application. Thus, in the case of resistive line impedance, an improved robust droop multiple loop control method is proposed, which includes the outer power loop and the double loop of inner voltage and current. In the voltage and current loop, the controller parameter design method considering the influences of load is applied, to suppress the adverse impact of load change. In the outer power loop,the equivalent output impedance of inverters is redesigned as resistance by virtual resistive impedance. An improved robust droop control strategy is proposed. Compared with the conventional robust droop control, the improved robust droop can improve start transition process, reduce the impact current, speed up the transition process and realize rapid smooth transition. Simulation and experimental results verify the control strategy.

Key words： Inner capacitor current loop voltage and current loop control improved robust droop control start transition process

收稿日期: 2013-10-31 出版日期: 2015-11-30

PACS:	TM13
	TM76

基金资助:国家自然科学基金重点资助项目（51237003）

作者简介: 王逸超男,1988年生,博士研究生,研究方向为微电网运行和新能源发电等。罗安男,1957年生,教授,博士生导师,研究方向为电力有源滤波、无功补偿和微电网控制。

引用本文:

王逸超, 罗安, 金国彬. 微网逆变器的改进鲁棒下垂多环控制[J]. 电工技术学报, 2015, 30(22): 116-123. Wang Yichao, Luo An, Jin Guobin. Improved Robust Droop Multiple Loop Control for Parallel Inverters in Microgrid. Transactions of China Electrotechnical Society, 2015, 30(22): 116-123.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2015/V30/I22/116

[1] 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): 10-16. 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): 10-16.
[2] 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.
[3] 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.
[4] 关雅娟, 邬伟扬, 郭小强. 微电网中三相逆变器孤岛运行控制技术[J]. 中国电机工程学报, 2011, 31(33): 52-60. Guan Yajuan, Wu Weiyang, Guo Xiaoqiang. Control strategy for three-phase inverters dominated microgrid in autonomous operation[J]. Proceedings of the CSEE, 2011, 31(33): 52-60.
[5] 黄如海, 吴云亚, 谢少军. 基于比例谐振调节器的逆变器双环控制策略研究[J]. 电工技术学报, 2012, 27(2): 77-81. Huang Ruhai, Wu Yunya, Xie Shaojun. Double-loop digital control strategy based on proportional-resonant controller[J]. Transactions of China Electrotechnical Society, 2012, 27(2): 77-81.
[6] 阚加荣, 吴云亚, 谢少军. 控制参数对并联逆变器性能影响[J]. 电工技术学报, 2009, 24(9): 120-126. Kan Jiarong, Wu Yunya, Xie Shaojun. Design of control parameters for parallel-connected inverters[J]. Transactions of China Electrotechnical Society, 2009, 24(9): 120-126.
[7] Dong D, Thacker T, Burgos R, et al. On zero steady- state error voltage control of single-phase PWM inverters with different load types[J]. IEEE Transactions on Power Electronics, 2011, 26(11): 3285-3297.
[8] 陈燕东, 罗安, 龙际根, 等. 阻性逆变器并联环流分析及鲁棒下垂多环控制[J]. 中国电机工程学报, 2013, 33(18): 18-29. Chen Yandong, Luo An, Long Jigen, et al. Circulating current analysis and robust droop multiple loop control method for parallel inverters using resistive output impedance[J]. Proceedings of the CSEE, 2013, 33(18): 18-29.
[9] Guerrero J M, Hang Lijun, Uceda J, et al. Control of distributed uninterruptible power supply systems[J]. IEEE Transactions on Industrial Applications, 2008, 55(8): 2845-2858.
[10] Yao Wei, Chen Min, Matas J, et al. Design and analysis of the droop control method for parallel inverters considering the impact of the complex impedance on the power sharing[J]. IEEE Transactions on Industrial Electronics, 2011, 58(2): 576-587.
[11] Guerrero J M, Berbel N, Matas J, et al. Decentralized control for parallel operation of distributed generation inverters using resistive output impedance[J]. IEEE Transactions on Industrial Electronics, 2007, 54(2): 994-1004.
[12] 吕志鹏, 罗安, 蒋雯倩, 等. 多逆变器环境微网环流控制新方法[J]. 电工技术学报, 2012, 27(1): 40-47. Lü Zhipeng, Luo An, Jiang Wenqian, et al. New circulation control method for micro-grid with multi- inverter micro-sources[J]. Transactions of China Elec- trotechnical Society, 2012, 27(1): 40-47.
[13] Zhong Qingchang. Robust droop controller for accurate proportional load sharing among inverters operated in parallel[J]. IEEE Transactions on Industrial Electronics, 2013, 60(4): 1281-1290.
[14] 吕志鹏, 罗安. 不同容量微源逆变器并联功率鲁棒控制[J]. 中国电机工程学报, 2012, 32(12): 35-42. Lü Zhipeng, Luo An. Robust power control of paralleled micro-source inverters with different power ratings[J]. Proceedings of the CSEE, 2012, 32(12): 35-42.
[15] Sao C K, Lehn P W. Autonomous load sharing of voltage source converters[J]. IEEE Transactions on Power Delivery, 2005, 20(2): 1009-1016.
[16] 赵清林, 郭小强, 邬伟扬. 单相逆变器并网控制技术研究[J]. 中国电机工程学报, 2007, 27(16): 60-64. Zhao Qinglin, Guo Xiaoqiang, Wu Weiyang. Research on control strategy for single-phase grid-connected inver- ter[J]. Proceedings of the CSEE, 2007, 27(16): 60-64.