风电汇集地区SVC控制方式对电压异常振荡影响因素分析

发布时间：2018-06-30 02:14

本文选题：风电汇集地区 + 动态无功补偿控制方式　；参考：《电力系统自动化》2017年01期

【摘要】：随着风电渗透率不断升高,在大规模风电汇集地区由新投入静止无功补偿器(SVC)引发电压异常振荡的现象时有发生,引发了运行及研究人员的关注。基于典型大规模风电汇集地区无功电压控制现状,在DIgSILENT/PowerFactory中建立等效的系统模型,从SVC控制方式的角度出发,采用小干扰稳定特征值分析、时域仿真及波特图等不同稳定分析方法,对无功补偿装置恒电压和恒无功两种控制方式的适应性进行了比较与分析。并通过引入控制理论中对特定变量进行开环传递函数推导的方法,从新投入控制器的视角,以理论层面上对实际现场中新无功补偿控制器投入诱发振荡的现象进行了机理分析。研究结果表明:SVC不同控制方式随着系统变化的适应性不同,就系统已投入SVC风电场数目及系统阻抗方面的变化而言,对于大规模风电汇集地区的弱送端系统,无功补偿装置恒无功控制方式较恒电压控制方式的适应性更优。
[Abstract]:With the increasing of wind power permeability, the phenomenon of abnormal voltage oscillation caused by new static Var compensator (SVC) in large-scale wind power gathering area has aroused the attention of the operation and researchers. Based on the current situation of reactive power control in typical large-scale wind power gathering area, an equivalent system model is established in the DIgSILENT / PowerFactory. From the point of view of SVC control mode, the small disturbance stability eigenvalue analysis is adopted. The adaptability of constant voltage and constant reactive power control methods of reactive power compensator is compared and analyzed by different stability analysis methods such as time domain simulation and Porter diagram. By introducing the open loop transfer function of certain variables into control theory and from the perspective of the new input controller, the mechanism of the oscillation induced by the input of the new reactive power compensation controller in the actual field is analyzed theoretically. The results show that the adaptability of different control methods of SVC is different with the change of the system. In terms of the number of SVC wind farms and the system impedance, the weak terminal system in the area of large-scale wind power gathering is concerned. The constant reactive power control mode of reactive power compensator is better than that of constant voltage control mode.
【作者单位】：华北电力大学电气与电子工程学院;华北电力科学研究院有限责任公司;国网新疆电力公司;国家电力调度控制中心;浙江大学电气工程学院;
【基金】：国家电网公司科技项目“风电、光伏、动态无功补偿装置等次同步谐波发生机理研究”~~
【分类号】：TM761;TM614

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