基于前馈解耦算法的单相电力弹簧功率控制
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摘要
提出一种基于前馈解耦算法的单相电力弹簧功率控制策略,并以纯阻性负载为例,建立单相电力弹簧在不同坐标系下的数学模型。利用二阶广义积分发生器构建虚拟的正交电压和电流信号完成单相dq旋转坐标变换。针对单相电力弹簧自身结构的特殊性,提出在传统功率解耦控制双闭环的结构中引入额外的滤波电容电压内环,以达到对公共连接点输入有功功率和无功功率完全解耦的目的,并详细描述了电容电压内环的设计方法。最后,通过实验验证所提策略的有效性。
The power control of single-phase electric spring(ES)based on feedforward decoupling algorithm is proposed.Taking the pure resistive load as an example,the mathematical models of single-phase ES in different coordinate systems are established.The second-order generalized integrator is introduced to construct the virtual quadrature voltage and current signals to complete the single-phase dq rotating coordinate transformation.Considering the particularity of the topology,an additional inner-loop for regulating filter capacitor voltage is added to the traditional power decoupling control using double closed loop to achieve the independent control of the active and reactive power injected to the point of common coupling(PCC).Besides,the design of the proposed inner-loop is illustrated in detail.Finally,the proposed power decoupling control method is verified by experimental results.
The power control of single-phase electric spring(ES)based on feedforward decoupling algorithm is proposed.Taking the pure resistive load as an example,the mathematical models of single-phase ES in different coordinate systems are established.The second-order generalized integrator is introduced to construct the virtual quadrature voltage and current signals to complete the single-phase dq rotating coordinate transformation.Considering the particularity of the topology,an additional inner-loop for regulating filter capacitor voltage is added to the traditional power decoupling control using double closed loop to achieve the independent control of the active and reactive power injected to the point of common coupling(PCC).Besides,the design of the proposed inner-loop is illustrated in detail.Finally,the proposed power decoupling control method is verified by experimental results.
引文
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[2] 朱瑛,高云波,臧海祥,等.风电机组输出功率平滑技术综述[J].电力系统自动化,2018,42(18):182-191.DOI:10.7500/AEPS 20180105004.ZHU Ying,GAO Yunbo,ZANG Haixiang,et al.Review of output power smoothing technologies for wind turbine[J].Automation of Electric Power Systems,2018,42(18):182-191.DOI:10.7500/AEPS20180105004.
[3] 窦晓波,常莉敏,倪春花,等.面向分布式光伏虚拟集群的有源配电网多级调控[J].电力系统自动化,2018,42(3):21-31.DOI:10.7500/AEPS20170221007.DOU Xiaobo,CHANG Limin,NI Chunhua,et al.Multi-level dispatching and control of active distribution network for virtual cluster of distributed photovoltaic[J].Automation of Electric Power Systems,2018,42(3):21-31.DOI:10.7500/AEPS 20170221007.
[4] XU S Y,LEE C K,WU F F.Electric springs—a new smart grid technology[J].IEEE transactions on smart grid,2012,3(3):1552-1561.
[5] LEE C K,CHAUDHURI B,HUI S Y.Hardware and control implementation of electric springs for stabilizing future smart grid with intermittent renewable energy sources[J].IEEE Journal of Emerging and Selected Topics IN Power Electronics,2013,1(1):18-27.
[6] CHEN X,HOU Y,TAN S C,et al.Mitigating voltage and frequency fluctuation in microgrids using electric springs[J].IEEE Transactions on Smart Grid,2015,6(2):508-515.
[7] YAN Shuo,LEE C K,YANG Tianbo,et al.Extending the operating range of electric spring using back-to-back converter:hardware implementation and control[J].IEEE Transactions on Power Electronics,2017,32(7):5171-5179.
[8] 周建萍,李欣煜,茅大钧,等.基于改进PSO算法的非理想电压条件下电力弹簧控制策略[J].电力系统自动化,2018,42(22):165-171.DOI:10.7500/AEPS20180415001.ZHOU Jianping,LI Xinyu,MAO Dajun,et al.Control strategy of electric spring under non-ideal voltage conditions based on improved PSO algorithm[J].Automation of Electric Power Systems,2018,42(22):165-171.DOI:10.7500/AEPS20180415001.
[9] LEE C K,XU S Y.Input AC voltage control bi-directional power converters:US 20130322139 A1[P],2013-12-05[2018-07-01].
[10] 程益生,陆振纲,汪可友,等.电力弹簧稳态运行范围及越限失灵机理分析[J].电力系统自动化,2017,41(14):147-152.DOI:10.7500/AEPS20161207003.CHENG Yisheng,LU Zhengang,WANG Keyou,et al.Analysis on steady-state operating rang and off-limits malfunction mechanism of electrical spring[J].Automation of Electric Power Systems,2017,41(14):147-152.DOI:10.7500/AEPS20161207003.
[11] TAN S C,LEE C K,HUI S Y.General steady-state analysis and control principle of electric springs with active and reactive power compensations[J].IEEE Transactions on Power Electronics,2013,28(8):3958-3969.
[12] LUO Xiao,AKHTAR Z,LEE C K,et al.Distributed voltage control with electric springs:comparison with STATCOM[J].IEEE Transactions on Smart Grid,2015,6(1):209-219.
[13] 程明,王青松,张建忠.电力弹簧理论分析与控制器设计[J].中国电机工程学报,2015,35(10):2436-2444.CHENG Ming,WANG Qingsong,ZHANG Jianzhong.Theoretical analysis and controller design of electric springs[J].Proceedings of the CSEE,2015,35(10):2436-2444.
[14] MOK K T,TAN S C,XU S Y.Decoupled power angle and voltage control of electric springs[J].IEEE Transactions on Power Electronics,2016,31(2):1216-1229.
[15] WANG Qingsong,CHENG Ming,JIANG Yunlei,et al.A simple active and reactive power control for applications of single-phase electric springs[J].IEEE Transactions on Industrial Electronics,2018,65(8):6291-6300.
[16] 黄云辉,周翩,王龙飞.弱电网下基于矢量控制的并网变换器功率控制稳定性[J].电力系统自动化,2016,40(14):93-99.HUANG Yunhui,ZHOU Pian,WANG Longfei.Power control stability in vector control based voltage source converters connected to weak grid[J].Automation of Electric Power Systems,2016,40(14):93-99.
[17] 颜湘武,贾焦心,王德胜,等.虚拟同步发电机的并网功率控制及模式平滑切换[J].电力系统自动化,2018,42(9):91-99.DOI:10.7500/AEPS20171115021.YAN Xiangwu,JIA Jiaoxin,WANG Desheng,et al.Power control and smooth mode switchover for grid-connected virtual synchronous generators[J].Automation of Electric Power Systems,2018,42(9):91-99.DOI:10.7500/AEPS 20171115021.
[18] 张崇巍,张兴.PWM整流器及其控制[M].北京:机械工业出版社,2012.ZHANG Chongwei,ZHANG Xing.PWM rectifier and its control[M].Beijing:China Machine Press,2012.
[19] 王福,姚钢,殷志柱,等.单相逆变器有源阻尼控制参数设计[J].电力电子技术,2017(6):43-47.WANG Fu,YAO Gang,YAN Zhizhu,et al.Parameter design of single-phase inverter with active damping[J].Power Electronics,2017(6):43-47.
[20] 马琳,金新民,唐芬,等.三相并网逆变器比例谐振控制及其网压前馈问题分析[J].电工技术学报,2012,27(8):56-63.MA Lin,JIN Xinmin,TANG Fen,et al.Analysis of three-phase grid-connected inverter proportional resonant control and grid voltage feed-forward[J].Transactions of China Electrotechnical Society,2012,27(8):56-63.