含储能的两级光伏功率振荡抑制策略研究
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摘要
功率振荡一直是电力系统亟待解决的稳定性问题,研究含储能的大容量光伏并网抑制电力系统功率振荡与当下能源发展方向相符。首先建立含储能的两级光伏并网模型,设计抑制功率振荡的控制策略,同时采用阻尼转矩分析推导该控制策略对系统阻尼影响的物理意义,以特征值法分析复杂的多机系统。搭建含储能的两级光伏并入单机和多机系统仿真模型,采用时域仿真和特征分析,验证了控制策略抑制功率振荡的有效性,在多机系统中对目标机组振荡抑制效果更明显,有效提高了系统的稳定性。
Power oscillation has always been a stability issue that needs to be solved in power systems. Study on large scale photovoltaic (PV) with energy storage suppresses power system power oscillations conforms to the current development direction of energy. Firstly,the model of two-stage PV with energy storage grid-connected is established,and then,the control strategy to suppress power oscillation is designed. The physical significance of the control strategy influencing the damping is derived through using the damping torque analysis,and complex multi-machine system is analyzed through using eigenvalue analysis. The simulation model of two-stage PV with energy storage connecting to single machine and multi-machine system is built. The effectiveness of control strategy to suppress power oscillation is verified by time domain simulation and eigenvalue analysis. In multi-machine system,the effect of objective unit oscillation suppression is more obvious. The stability of the system is effectively improved.
Power oscillation has always been a stability issue that needs to be solved in power systems. Study on large scale photovoltaic (PV) with energy storage suppresses power system power oscillations conforms to the current development direction of energy. Firstly,the model of two-stage PV with energy storage grid-connected is established,and then,the control strategy to suppress power oscillation is designed. The physical significance of the control strategy influencing the damping is derived through using the damping torque analysis,and complex multi-machine system is analyzed through using eigenvalue analysis. The simulation model of two-stage PV with energy storage connecting to single machine and multi-machine system is built. The effectiveness of control strategy to suppress power oscillation is verified by time domain simulation and eigenvalue analysis. In multi-machine system,the effect of objective unit oscillation suppression is more obvious. The stability of the system is effectively improved.
引文
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[2]国家电力调度中心.电网典型事故分析1999-2007[M].北京:中国电力出版社,2008.
[3]杜颖,王克文,王君亮,等.PSS4B型电力系统稳定器参数整定[J].电测与仪表,2014,51(21):67-73.Du Ying,Wang Kewen,Wang Junliang,et al.Parameter Setting of Power System Stabilizer PSS4B[J].Electrical Measurement&Instrumentation.2014,51(21):67-73.
[4]刘翔宇,何玉灵,孟凡超,等.既定PSS在不同运行状态下的适应性分析[J].电测与仪表,2016,53(15):95-100.Liu Xiangyu,He Yuling,Meng Fanchao,et al.Adaptation analysis on fixed PSS under different performing conditions[J].Electrical Measurement&Instrumentation.2016,53(15):95-100.
[5]YANG G Y,HOVLAND G,MAJUMDER R,et al.TCSC Allocation based on line flow based equations via mixed-integer programming[J].IEEE Transactions on Power Systems,2007,22(4):2262-2268.
[6]龚鸿,江伟,王渝红,等.基于静止同步补偿器与直流调制协调控制的低频振荡抑制方法[J].电工技术学报,2017,32(6):67-75.Gong Hong,Jiang Wei,Wang Yuhong,et al.A survey on damping low frequency oscillation based on coordination strategy of static synchronized compensator modulation[J].Transactions of China Electrotechnical Society,2017,32(6):67-75.
[7]徐湘楚,朱凌,郭本峰.基于虚拟同步发电机的逆变电源控制策略研究[J].电测与仪表,2015,52(2):80-84.Xu Xiangchu,Zhu Ling,Guo Benfeng.Research on the control strategies of inverters based on the virtual synchronous generator[J].Electrical Measurement&Instrumentation,2015,52(2):80-84.
[8]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.Zheng Tianwen,Chen Laijun,Chen Tianyi,et al.Review and prospect of virtual synchronous generator technologies[J].Automation of Electric Power Systems,2015,39(21):165-175.
[9]涂春鸣,兰征,肖凡,等.具备同步电机特性的级联型光伏发电系统[J].中国电机工程学报,2017,37(2):433-444.Tu Chunming,Lan Zheng,Xiao Fan,et al.Study on cascaded H-bridge photovoltaic power systems with synchronous generator characteristics[J].Proceedings of the CSEE,2017,37(2):433-444.
[10]国家能源局.2016年光伏发电统计信息[EB/OL].(2017-02-04).[2018-04-09].http://www.nea.gov.cn/2017-02/04/c_136030860.htm
[11]倪以信,陈寿孙,张宝霖.动态电力系统的理论和分析[M].北京:清华大学出版社,2002.