弱电网下多逆变器并网控制通道间的交互影响分析Analysis on Interactive Influences Among Control Loops of Multi Inverters Connected to Weak-Structured Power System
唐振东;杨洪耕;袁林;
摘要(Abstract):
弱电网下,长距离的输电线路和并网逆变器数目的增加使得多逆变器并网时的电网阻抗不可忽略。电网等值阻抗的存在将多个逆变器通过公共连接点(point of common coupling,PCC)耦合起来从而引起逆变器控制通道间产生复杂交互影响。建立弱电网下多逆变器并网等效模型,采用基于频率的RGA矩阵与NI指数相结合的方法对逆变器控制通道间的交互作用进行定量分析,在确保并网系统稳定性的前提下,给出了随着并网逆变器台数、控制参数和电网等值阻抗改变时交互影响的变化特性。最后,在Simulink仿真平台中搭建多逆变器并网模型,验证分析结果正确性的同时精确描述了多逆变器并网时随着逆变器并网台数的增加控制交互影响变化的一般规律。
关键词(KeyWords): 弱电网;相对增益矩阵;NI指数;控制交互;多并网逆变器
基金项目(Foundation):
作者(Author): 唐振东;杨洪耕;袁林;
Email:
DOI: 10.13335/j.1000-3673.pst.2016.11.036
参考文献(References):
- [1]Blaabjerg F,Teodorescu R,Liserre M,et al.Overview of control and grid synchronization for distributed power generation systems[J].IEEE Transactions on Industrial Electronics,2006,53(5):1398-1409.
- [2]严干贵,常青云,黄亚峰,等.弱电网接入下多光伏逆变器并联运行特性分析[J].电网技术,2014,38(4):933-940.Yan Gangui,Chang Qingyun,Huang Yafeng,et al.Analysis on parallel operational characteristics of multi photovoltatic inverters connected to weak-structured power system[J].Power System Technology,2014,38(4):933-940(in Chinese).
- [3]胡国珍,段善旭,陈昌松,等.弱电网下储能电池能量回馈系统自适应并网控制策略[J].电力系统自动化,2013,37(1):84-89.Hu Guozhen,Duan Shanxu,Chen Changsong,et al.An adaptive grid-connected control strategy for energy feedback system in weak grid[J].Automation of Electric Power Systems,2013,37(1):84-89(in Chinese).
- [4]严干贵,李龙,黄亚峰,等.弱电网下联网光伏逆变系统稳定性分析及控制参数整定[J].太阳能学报,2013,34(11):1853-1859.Yan Gangui,Li Long,Huang Yafeng,et al.Stability analysis and control parameters tuning of grid-connected photovoltaic inverter system in weak grid[J].Acta Energies Solaris Sinica,2013,34(11):1853-1859(in Chinese).
- [5]杨东升,阮新波,吴恒.提高LCL型并网逆变器对弱电网适应能力的虚拟阻抗方法[J].中国电机工程学报,2014,33(15):2327-2335.Yang Dongsheng,Ruan Xinbo,Wu Heng.A virtual impedance method to improve the performance of LCL-type grid-connected inverters under weak grid conditions[J].Proceedings of the CSEE,2014,33(15):2327-2335(in Chinese).
- [6]刘斌,王蒙蒙,黄凯伦,等.引入网侧电感电流修正量的LCL逆变控制器及其状态估计[J].电网技术,2016,40(2):556-562.Liu Bin,Wang Mengmeng,Huang Kailun,et al.LCL inverter controller with grid-side inductor current correction and its state estimation[J].Power System Technology,2016,40(2):556-562(in Chinese).
- [7]Twining E,Holmes D G.Grid current regulation of a three-phase voltage source inverter with an LCL input filter[J].IEEE Transactions on Power Electronics,2003,18(3):888-895.
- [8]杨苓,罗安,陈燕东,等.LCL型逆变器的鲁棒延时补偿并网控制方法及其稳定性分析[J].电网技术,2015,39(11):3102-3108.Yang Ling,Luo An,Chen Yandong,et al.A robust time delay compensated grid-connected control method for LCL-type inverter and stability analysis[J].Power System Technology,2015,39(11):3102-3108(in Chinese).
- [9]许德志,汪飞,毛华龙,等.多并网逆变器与电网的谐波交互建模与分析[J].中国电机工程学报,2013,33(12):64-71.Xu Dezhi,Wang Fei,Mao Hualong,et al.Modeling and analysis of harmonic interaction between multiple grid-connected inverters and the utility grid[J].Proceedings of the CSEE,2013,33(12):64-71(in Chinese).
- [10]He J.Investigation and active damping of multiple resonance in a parallel-inverter-based microgrid[J].IEEE Transactions on Power Electronics,2013,28(1):234-246.
- [11]胡伟,孙建军,马谦,等.多个并网逆变器间的交互影响分析[J].电网技术,2014,38(9):2511-2518.Hu Wei,Sun Jianjun,Ma Qian,et al.Analysis on interactive influence among multi grid-connected inverters[J].Power System Technology,2014,38(9):2511-2518(in Chinese).
- [12]Bristol E.On a new measure of interaction for multivariable process control[J].IEEE Transactions on Automation Control,1966,11(1):133-134.
- [13]张鹏翔,曹一家,王海风,等.相对增益矩阵方法在柔性交流输电系统多变量控制器交互影响分析中的应用[J].中国电机工程学报,2004,24(7):13-17.Zhang Pengxiang,Cao Yijia,Wang Haifeng,et al.Application of relative gain array method to analyze interaction of multi-functional facts controllers[J].Proceedings of the CSEE,2004,24(7):13-17(in Chinese).
- [14]李鹏,杨世旺,殷梓恒.基于相对增益矩阵的微网稳压解耦下垂控制方法[J].中国电机工程学报,2015,35(5):1041-1050.Li Peng,Yang Shiwang,Yin Ziheng.Voltage stabilization and decoupling droop control method for microgrid based on RGA[J].Proceedings of the CSEE,2015,35(5):1041-1050(in Chinese).
- [15]贾东强,韦统振,霍群海.DSTATCOM交直流控制回路交互影响分析[J].电工技术学报,2013,28(S2):324-330.Jia Dongqiang,Wei Tongzhen,Huo Qunhai.The interaction analysis between AC and DC control loop of DSTATCOM[J].Transactions of China Electro Technical Society,2013,28(S2):324-330(in Chinese).
- [16]李海琛,董萍,刘明波,等.基于相对增益矩阵和Prony技术的南方电网FACTS和HVDC之间交互影响分析[J].电网技术,2012,36(8):169-174.Li Haichen,Dong Ping,Liu Mingbo,et al.Analysis on interaction between FACTS devices and HVDC power transmission system in China southern power grid based on relative gain array and Prony technology[J].Power System Technology,2012,36(8):169-174(in Chinese).
- [17]周小林,王志燊,王永骥,等.飞行控制系统的动态相对增益方法研究[J].计算技术与自动化,2012,31(4):7-11.Zhou Xiaolin,Wang Zhishen,Wang Yongji,et al.Dynamic relative gain array method of flight control system[J].Computing Technology and Automation,2012,31(4):7-11(in Chinese).
- [18]曹一家,陶佳,王光增,等.FACTS控制器间交互影响及协调控制研究进展[J].电力系统及其自动化学报,2008,20(1):1-8.Cao Yijia,Tao Jia,Wang Guangzeng,et al.Research progress on interaction and coordinated control among FACTS controller[J].Proceedings of the Chinese Society of Universities for Electric Power System and its Automation,2008,20(1):1-8(in Chinese).
- [19]许锋,魏小丽,任丽红,等.基于多变量广义预测控制的不稳定系统控制结构选择方法[J].自动化学报,2013,39(9):1547-1551.Xu Feng,Wei Xiaoli,Ren Lihong,et al.A control structure selection method based on multivariable generalized predictive control for unstable processes[J].Acta Automatica Sinica,2013,39(9):1547-1551(in Chinese).
- [20]叶凌箭,宋执环.多变量控制系统的一种变量配对方法[J].控制与决策,2009,24(12):1795-1800.Ye Lingjian,Song Zhihuan.Variable pairing method for multivariable control systems[J].Control and Decision,2009,24(12):1795-1800(in Chinese).
- [21]陈继开,王振浩,姚艳菊.配电系统中DFACTS设备运行交互影响研究[J].电测与仪表,2014,51(9):50-56.Chen Jikai,Wang Zhenhao,Yao Yanju.Study on interactions of DFACTS devices operating in distribution system[J].Electrical Measurement&Instrumentation,2014,51(9):50-56(in Chinese).
- [22]艾欣,韩晓男,孙英云.大型光伏电站并网特性及其低碳运行与控制技术[J].电网技术,2013,37(1):15-23.Ai Xin,Han Xiaonan,Sun Yingyun.Grid-connected characteristics of large-scale photovoltaic power station and its low-carbon operation and control technology[J].Power System Technology,2013,37(1):15-23(in Chinese).
- [23]周德佳,赵争鸣,袁立强,等.300 k W光伏并网系统优化控制与稳定性分析[J].电工技术学报,2008,23(11):116-122.Zhou Dejia,Zhao Zhengming,Yuan Liqiang,et al.Optimum control and stability analysis for a 300 k W photovoltaic grid-connected system[J].Transactions of China Electro Technical Society,2008,23(11):116-122(in Chinese).
- [24]沈瑶,罗安,陈燕东,等.基于功率前馈的光伏并网控制方法及稳定性分析[J].电网技术,2014,38(9):2449-2453.Shen Yao,Luo An,Chen Yandong,et al.A power feedforward-based control approach for grid-connection of photovoltaic generation and its stability analysis[J].Power System Technology,2014,38(9):2449-2453(in Chinese).