Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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基于能量函数法的含VSG-IIDG电力系统暂态稳定分析

来源:电工电气发布时间:2019-03-22 13:22 浏览次数:53
基于能量函数法的含VSG-IIDG电力系统暂态稳定分析
 
焦永辉1,卜京1,张宁宇2,周前2,汪成根2,刘建坤2
(1 南京理工大学 自动化学院,江苏 南京 210094;2 国网江苏省电力公司电力科学研究院,江苏 南京 211100)
 
    摘 要:采用虚拟同步发电机(VSG)策略的电压源逆变型分布式电源(IIDG)的暂态特性与同步发电机类似,而其电流饱和环节使其暂态特性又有别于同步发电机,使系统暂态稳定分析变得更加复杂。基于能量函数法提出了一种计及VSG-IIDG电力系统的暂态能量函数。通过分析暂态过程中逆变器的暂态特性,以此构建其虚拟功角模型,并分析了电流饱和环节对能量函数的影响,基于此,采用输出功率拟合方法构建了计及VSG-IIDG的系统暂态能量函数。利用MATLAB/Simulink进行了仿真,验证了该方法的有效性。
    关键词:虚拟同步发电机;逆变器;虚拟功角特性;暂态稳定;能量函数;功率拟合
    中图分类号:TM712     文献标识码:A     文章编号:1007-3175(2019)03-0007-05
 
Transient Stability Analysis with VSG-IIDG Power System Based on Energy Function
 
JIAO Yong-hui1, BU Jing1, ZHANG Ning-yu2, ZHOU Qian2, WANG Cheng-gen2, LIU Jian-kun2
(1 School of Automation, Nanjing University of Science and Technology, Nanjing 210094, China;
2 State Grid Jiangsu Electric Power Company Research Institute, Nanjing 2111 00, China)
 
    Abstract: The transient characteristics of the voltage source IIDG using VSG strategy are similar to the synchronous generator, but when the current saturation link is considered, their transient characteristics will be different, and the system transient analysis will be more complex. This paper put forward a kind of transient energy function with VSG-IIDG power system based on the energy function. This paper built the virtual power angle model of the inverter by analyzing the inverter transient characteristic during the transient process and analyzed the influence of the current saturation link on the energy function. On the basis of this, the output power fitting method was adopted to establish the transient energy function with the VSG-IIDG power system. Simulink in MATLAB was used to carry out simulation and to verify the effectiveness of this method.
    Key words: VSG; inverter; virtual power angle characteristic; transient stability; energy function; output power fitting
 
参考文献
[1] 郑天文,陈来军,陈天一,等. 虚拟同步发电机技术及展望[J]. 电力系统自动化,2015,39(21):165-175.
[2] 叶希,鲁宗相,乔颖,等. 风火联运源端系统有功优化运行分层协调思路[J]. 电力系统自动化,2014,38(20):1-8.
[3] 范明天, 张祖平, 苏傲雪, 等. 主动配电系统可行技术的研究[J]. 中国电机工程学报,2013,33(22):12-18.
[4] 丁明,杨向真,苏建徽. 基于虚拟同步发电机思想的微电网逆变电源控制策略[J]. 电力系统自动化,2009,33(8):89-93.
[5] ZHONG Q C, WEISS G. Synchronverters: inverters that mimic synchronous generators[J].IEEE Transactions on Industrial Electronics,2011,58(4):1259-1267.
[6] D’ARCO S, SUUL J A.Equivalence of virtual synchronous machines and frequency-droops for converter-based microgrids[J].IEEE Transactions on Smart Grid,2014,5(1):394-395.
[7] 黄林彬,章雷其,辛焕海,等. 下垂控制逆变器的虚拟功角暂态稳定机理分析[J]. 电力系统自动化,2016,40(12):117-123.
[8] POGAKU N, PRODANOVIC M, GREEN T C.Modeling, analysis and testing of autonomous operation of an inverter-based microgrid[J].IEEE Transactions on Power Electronics,2007,
22(2):613-625.
[9] SHINTAL T, MURA Y, ISE T.Oscillation damping of a distributed generator using a virtual synchronous generator[J].IEEE Transactions on Power Delivery,2014,29(2):668-676.
[10] ALIPOOR J, MIURA Y, ISE T. Distributed generation grid integration using virtual synchronous generator with adoptive virtual inertia[C]//Proceedings of 2013 IEEE Energy Conversion Congress and Exposition,2013,8237:4546-4552.
[11] 程冲,杨欢,曾正,等. 虚拟同步发电机的转子惯量自适应控制方法[J]. 电力系统自动化,2015,39(19):82-89.
[12] PAQUETTE A D, DIVAN D M.Virtual impedance current limiting for inverters in microgrids with synchronous generators[J].IEEE Transactions on Industry Application,2014,51(2):1630-1638.