电网畸变条件下基于LCL型滤波的STATCOM电流控制策略研究
Study of Current Control Strategy of STATCOM Based on LCL Filter Under Distorted Grid Conditions
摘 要
在节约总电感用量的前提下，为了提高系统的滤波性能，选择LCL型滤波器作为配电网STATCOM（DSTATCOM）的输出滤波器。LCL型滤波器是一个三阶系统，采用直接入网电流控制时谐振峰的存在会影响系统的稳定性。为此，提出一种基于状态反馈的虚拟阻抗法用于抑制LCL型滤波器的谐振峰，从而避免无源阻尼法增大系统的损耗。由于电网电压中含有谐波含量会造成补偿电流畸变，从而不能准确跟踪其指令值，针对这一问题，提出一种多谐振比例谐振(PR)控制器，用于增大特定频率处电网电压对入网电流的输入阻抗，从而抑制电网谐波电压的扰动，优化补偿电流波形，提高电流追踪性能。仿真和实验结果证实了控制策略的有效性。
DSTATCOM
LCL型滤波器
虚拟阻抗
特征谐波消除
Girdconnected inverter
DSTATCOM
LCL filter
Virtual impedance
Characteristic harmonic elimination
Abstract
In order to improve the filtering performance of the system with small inductor, LCL filter is selected as the output filter of distribution static synchronous compensator (DSTATCOM). LCL filter is a threeorder system, the resonant peak may result in the instability of system. Statefeedback control based on virtual impedance is proposed to suppress the resonant peak, which reduces system losses compared with passive damping. The grid voltage harmonics result in the distortion of compensation current, which makes the compensation current not track its reference. A multiresonance proportional resonant (PR) regulator is proposed to increase the grid input impedance at a specific frequency, which rejects the disturbance of grid harmonics and improves the current tracking performance. Simulation and experimental results prove the validity of this method.
中图分类号 TM464
所属栏目 能源战略
基金项目
收稿日期 2014/7/16
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备注刘 俊(1971)，男，高级工程师，本科，从事配电网技术研究和管理。
引用该论文: Liu Jun,Yang Fan,Zhang Yiyan. Study of Current Control Strategy of STATCOM Based on LCL Filter Under Distorted Grid Conditions[J]. Power & Energy, 2014, 35(6): 665～671
刘 俊,杨 帆,张一彦. 电网畸变条件下基于LCL型滤波的STATCOM电流控制策略研究[J]. 电力与能源, 2014, 35(6): 665～671
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参考文献
【1】CETIN A, ERMIS M. VSCBased DSTATCOM with selective harmonic elimination［J］. Industry Applications, IEEE Transactions on,2009,45(3):10001015.
【2】BLAZIC B, PAPIC I. Improved DStatCom control for operation with unbalanced currents and voltages［J］. Power Delivery, IEEE Transactions on,2006,21(1):225233.
【3】TZUNGLIN L, SHANGHUNG H, YUHUNG C. DSTATCOM with PositiveSequence admittance and NegativeSequence conductance to mitigate voltage fluctuations in HighLevel penetration of DistributedGeneration systems［J］. Industrial Electronics, IEEE Transactions on,2013,60(4):14171428.
【4】丁理杰，杜新伟，周惟婧．SVC与STATCOM在大容量输电通道上的应用比较［J］．电力系统保护与控制，2010,38(24)：7781+87．
【5】朱劲松，李磊．基于模块化多电平换流器的STATCOM分析与控制［J］．电力系统保护与控制，2012,40(24)：113117+1．
【6】杨晓峰，范文宝，王晓鹏，等．基于模块组合多电平变换器的STATCOM及其控制［J］．电工技术学报，2011,26(08)：713．
【7】刘景晖，郑益慧，姚钢，等．自适应特征谐波消除策略的并网逆变器电流跟踪优化方法［J］．电工技术学报，2013,28(09)：120128．
【8】周杨，江道灼，王玉芬．基于虚拟磁链的静止同步补偿器直接功率控制策略研究［J］．电网技术，2012,36(11)：205210．
【9】涂春鸣，李慧，唐杰，等．电网电压不对称对DSTATCOM的影响分析及抑制［J］．电工技术学报，2009,24(8)：114121．
【10】王存平，尹项根，张哲，等．配电网STATCOM输出LCL型滤波器特性分析及参数设计［J］．电工技术学报，2011,26(12)：99105．
【11】胡文翠，王明渝，钱坤．LCL型并网逆变器电流控制器设计［J］．电力系统保护与控制，2013(08)：123128．
【12】Li Weiwei, Ruan Xinbo, Pan Donghua, et al. FullFeedforward schemes of grid voltages for a ThreePhaseType GridConnected inverter［J］. Industrial Electronics, IEEE Transactions on,2013,60(6):22372250.
【13】ERIC W, LEHN P W. Digital current control of a voltage source converter with active damping of LCL resonance［J］. Power Electronics, IEEE Transactions on,2006,21(5):13641373.
【14】ERIKA T, HOLMES D G. Grid current regulation of a threephase voltage source inverter with an LCL input filter［J］. Power Electronics, IEEE Transactions on,2003,18(3):888895.
【15】Xue Mingyu, Yu Zhang, Yong Kang, et al. Full feedforward of grid voltage for discrete state feedback controlled GridConnected inverter with LCL filter［J］. Power Electronics, IEEE Transactions on,2012,27(10):42344247.
【16】Teng Guofei, Xiao Guochun, Zhang Zhibo, et al. A control method with grid disturbances suppression for a singlephase LCLfilterbased gridconnected inverter［C］//Applied Power Electronics Conference and Expositio,2012.
【17】Zhang Yongchang, Zhao Zhengming, Lu Ting, et al. A comparative study of Luenberger observer, sliding mode observer and extended Kalman filter for sensorless vector control of induction motor drives［C］//Energy Conversion Congress and Exposition, 2009. E,2009.
【2】BLAZIC B, PAPIC I. Improved DStatCom control for operation with unbalanced currents and voltages［J］. Power Delivery, IEEE Transactions on,2006,21(1):225233.
【3】TZUNGLIN L, SHANGHUNG H, YUHUNG C. DSTATCOM with PositiveSequence admittance and NegativeSequence conductance to mitigate voltage fluctuations in HighLevel penetration of DistributedGeneration systems［J］. Industrial Electronics, IEEE Transactions on,2013,60(4):14171428.
【4】丁理杰，杜新伟，周惟婧．SVC与STATCOM在大容量输电通道上的应用比较［J］．电力系统保护与控制，2010,38(24)：7781+87．
【5】朱劲松，李磊．基于模块化多电平换流器的STATCOM分析与控制［J］．电力系统保护与控制，2012,40(24)：113117+1．
【6】杨晓峰，范文宝，王晓鹏，等．基于模块组合多电平变换器的STATCOM及其控制［J］．电工技术学报，2011,26(08)：713．
【7】刘景晖，郑益慧，姚钢，等．自适应特征谐波消除策略的并网逆变器电流跟踪优化方法［J］．电工技术学报，2013,28(09)：120128．
【8】周杨，江道灼，王玉芬．基于虚拟磁链的静止同步补偿器直接功率控制策略研究［J］．电网技术，2012,36(11)：205210．
【9】涂春鸣，李慧，唐杰，等．电网电压不对称对DSTATCOM的影响分析及抑制［J］．电工技术学报，2009,24(8)：114121．
【10】王存平，尹项根，张哲，等．配电网STATCOM输出LCL型滤波器特性分析及参数设计［J］．电工技术学报，2011,26(12)：99105．
【11】胡文翠，王明渝，钱坤．LCL型并网逆变器电流控制器设计［J］．电力系统保护与控制，2013(08)：123128．
【12】Li Weiwei, Ruan Xinbo, Pan Donghua, et al. FullFeedforward schemes of grid voltages for a ThreePhaseType GridConnected inverter［J］. Industrial Electronics, IEEE Transactions on,2013,60(6):22372250.
【13】ERIC W, LEHN P W. Digital current control of a voltage source converter with active damping of LCL resonance［J］. Power Electronics, IEEE Transactions on,2006,21(5):13641373.
【14】ERIKA T, HOLMES D G. Grid current regulation of a threephase voltage source inverter with an LCL input filter［J］. Power Electronics, IEEE Transactions on,2003,18(3):888895.
【15】Xue Mingyu, Yu Zhang, Yong Kang, et al. Full feedforward of grid voltage for discrete state feedback controlled GridConnected inverter with LCL filter［J］. Power Electronics, IEEE Transactions on,2012,27(10):42344247.
【16】Teng Guofei, Xiao Guochun, Zhang Zhibo, et al. A control method with grid disturbances suppression for a singlephase LCLfilterbased gridconnected inverter［C］//Applied Power Electronics Conference and Expositio,2012.
【17】Zhang Yongchang, Zhao Zhengming, Lu Ting, et al. A comparative study of Luenberger observer, sliding mode observer and extended Kalman filter for sensorless vector control of induction motor drives［C］//Energy Conversion Congress and Exposition, 2009. E,2009.
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