并网电压源逆变器的电网电压调制直接功率控制
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摘要
针对并网电压源逆变器(VSI)提出了一种电网电压调制(GVM)直接功率控制(DPC)策略。通过定义GVM的控制输入,可在不使用锁相环的情况下得到一个简单的、耦合状态的多输入多输出系统(MIMO)。在此基础上,依据设定的状态反馈线性化控制法则实现了有功和无功的解耦控制并获得了两个独立的二阶系统,从而不仅能够提高瞬时有功功率和无功功率的收敛速度,还能够获得良好的稳态性能。最后将系统转化为线性MIMO。所提出的方法通过使用MATLAB/Simulink和PLECS模块进行了验证。仿真结果表明,该方法不仅具有良好的有功和无功功率跟踪性能,而且电网三相电流的纹波也比滑模DPC控制方法的大为减小。
A grid voltage modulation( GVM) direct power control( DPC) strategy is proposed for grid-connected voltage source inverter( VSI). By defining the control inputs of the GVM,a simple,coupled state multiple input multiple output(MIMO) system can be obtained without the use of a phase locked loop. On this basis,the active and reactive decoupling control is achieved and two independent second-order systems are obtained according to the set of state feedback linearization control laws,which can not only improve the convergence rate of instantaneous real power and reactive power,but also obtain good steady-state performance. Finally,the system is transformed into linear MIMO. The proposed method is validated by using MATLAB/Simulink and PLECS modules. The simulation results show that this method not only has good active and reactive power tracking performance,but also has lower ripple of three-phase current of power grid than the sliding mode DPC control method.
A grid voltage modulation( GVM) direct power control( DPC) strategy is proposed for grid-connected voltage source inverter( VSI). By defining the control inputs of the GVM,a simple,coupled state multiple input multiple output(MIMO) system can be obtained without the use of a phase locked loop. On this basis,the active and reactive decoupling control is achieved and two independent second-order systems are obtained according to the set of state feedback linearization control laws,which can not only improve the convergence rate of instantaneous real power and reactive power,but also obtain good steady-state performance. Finally,the system is transformed into linear MIMO. The proposed method is validated by using MATLAB/Simulink and PLECS modules. The simulation results show that this method not only has good active and reactive power tracking performance,but also has lower ripple of three-phase current of power grid than the sliding mode DPC control method.
引文
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[12]宋文胜,邓知先.单相PWM整流器定频模型预测功率控制算法[J].电机与控制学报,2016,20(4):93-100.Song Wensheng,Deng Zhixian.Model predictive power control scheme for single-phase PWM rectifiers with constant switching frequency[J].Electric Machines and Control,2016,20(4):93-100.
[13]郭晓明,贺益康,何奔腾.双馈异步风力发电机开关频率恒定的直接功率控制[J].电力系统自动化,2008,(1):61-65.Guo Xiaoming,He Yikang,He Benteng.Direct Power Control for Doubly-fed Induction Generator Wind Turbines with a Constant Switching Frequency[J].Automation of Electric Power Systems,2008,(1):61-65.
[14]周小杰,阮毅,汪飞.单相并网变换器预测直接功率控制策略研究[J].中国电机工程学报,2014,34(30):5269-5276.Zhou Xiaojie,Ruan Yi,Wang Fei.A Predictive Direct Power Control Scheme for Single-phase Grid-connected Converters[J].Proceedings of the Csee,2014,34(30):5269-5276.
[15]杨健,李颖晖,李宁.基于功率预测模型的并网逆变器直接功率控制[J].电测与仪表,2013,50(8):26-30.Yang Jian,Li Yinghui,Li Ning.Model-Based Predictive Direct Power Control of Three-Phase Grid-Connected Inverters[J].Electrical Measurement&Instrumentation,2013,50(8):26-30.
[2]胡希同,赵艳雷,张磊.风电功率调节系统储能变流器控制策略[J].电测与仪表,2013,50(9):41-45.Hu Xitong,Zhao Yanlei,Zhang Lei.Control Strategy for Energy Storage Converter of Wind Power Adjustment System[J].Electrical Measurement&Instrumentation,2013,50(9):41-45.
[3]廖勇,庄凯,姚骏.电网电压不平衡时全功率风电并网变流器的控制策略[J].电网技术,2012,36(1):72-78.Liao Yong,Zhuang Kai,Yao Jun.A Control Strategy for Grid Connecting Full Power Converter of Wind Power Generation System Under Unbalanced Grid Voltage[J].Power System Technology,2012,36(1):72-78.
[4]尹璐,赵争鸣,贺凡波.具有高功率因数的三相光伏并网逆变器控制算法[J].电力自动化设备,2012,32(10):1-5,11.Yin Lu,Zhao Zhengming,He Fanbo.Control algorithm for three-phase grid-connected photovoltaic inverter with high power factor[J].Electric Power Automation Equipment,2012,32(10):1-5,11.
[5]许烽,徐政.一种适用于多端直流系统的模块化多电平潮流控制器[J].电力系统自动化,2015,39(3):95-102.Xu Feng,Xu Zheng.A Modular Multilevel Power Flow Controller for Multi-terminal HVDC Systems[J].Automation of Electric Power Systems,2015,39(3):95-102.
[6]陈祥训,王宇红,陈雷.逆变器消谐方程实时精确解的通用初值研究[J].中国电机工程学报,2015,35(18):4753-4761.Chen Xiangxun,Wang Yuhong,Chen Lei.Universal Initial Values for Solving Harmonic Elimination Equation Exactly and Fast[J].Proceedings of the Csee.2015,35(18):4753-4761.
[7]M.Reyes,P.Rodriguez,S.Vazquez,A.Luna,R.Teodorescu and J.Carrasco.Enhanced decoupled double synchronous reference frame current controller for unbalanced grid-voltage conditions[J].IEEETrans.Power Electron,2012,27(9):3934-3943.
[8]J.Hu,L.Shang,Y.He and Z.Zhu.Direct active and reactive power regulation of grid-connected DC/AC converters using sliding mode control approach[J].IEEE Trans.Power Electron,2011,26(1):210-222.
[9]欧阳武,卢香平,杨兴武.PWM整流器直接功率控制开关表优化方法[J].电测与仪表,2014,51(9):92-96.Ouyang Wu,Lu Xiangping,Yang Xingwu.Direct Power Control Switching Table Optimization for PWM Rectifier[J].Electrical Measurement&Instrumentation,2014,51(9):92-96.
[10]杨兴武,赵剑飞,杨兴华.基于变换器输出电压快速计算的直接功率控制方法[J].中国电机工程学报,2010,30(36):59-64.Yang Xingwu,Zhao Jianfei,Yang Xinghua.Direct Power Control Based on Output Voltage Computation Technique for AC/DC Converters[J].Proceedings of the Csee,2010,30(36):59-64.
[11]T.Noguchi,H.Tomiki,S.Kondo and I.Takahashi.Direct power control of PWM converter without power-source voltage sensors[J].IEEE Trans.Ind.Appl,1998,34(3):473-479.
[12]宋文胜,邓知先.单相PWM整流器定频模型预测功率控制算法[J].电机与控制学报,2016,20(4):93-100.Song Wensheng,Deng Zhixian.Model predictive power control scheme for single-phase PWM rectifiers with constant switching frequency[J].Electric Machines and Control,2016,20(4):93-100.
[13]郭晓明,贺益康,何奔腾.双馈异步风力发电机开关频率恒定的直接功率控制[J].电力系统自动化,2008,(1):61-65.Guo Xiaoming,He Yikang,He Benteng.Direct Power Control for Doubly-fed Induction Generator Wind Turbines with a Constant Switching Frequency[J].Automation of Electric Power Systems,2008,(1):61-65.
[14]周小杰,阮毅,汪飞.单相并网变换器预测直接功率控制策略研究[J].中国电机工程学报,2014,34(30):5269-5276.Zhou Xiaojie,Ruan Yi,Wang Fei.A Predictive Direct Power Control Scheme for Single-phase Grid-connected Converters[J].Proceedings of the Csee,2014,34(30):5269-5276.
[15]杨健,李颖晖,李宁.基于功率预测模型的并网逆变器直接功率控制[J].电测与仪表,2013,50(8):26-30.Yang Jian,Li Yinghui,Li Ning.Model-Based Predictive Direct Power Control of Three-Phase Grid-Connected Inverters[J].Electrical Measurement&Instrumentation,2013,50(8):26-30.