基于网络能量的交直流混联电力系统暂态稳定评估  

Transient Stability Assessment in AC-DC Hybrid Power System Based on Network Energy

作　　者：于枋彤 刘铖[1] 孟涛 YU Fangtong;LIU Cheng;MENG Tao(Northeast Electric Power University,Jilin 132012,China;State Grid Jilin Electric Power Research Institute,Changchun 130021,China)

机构地区：[1]东北电力大学,吉林吉林132012 [2]国网吉林省电力有限公司电力科学研究院,长春130021

出　　处：《吉林电力》2023年第3期1-6,12,共7页Jilin Electric Power

基　　金：吉林市科技创新发展计划项目(20210103093)。

摘　　要：利用网络变量运行轨迹分析交直流混联电力系统的暂态稳定性,能够更加直观地展现分析结果,为暂态稳定的局部控制提供理论基础。首先,基于网络结构构建了适用于混联系统的暂态能量函数,依据直流线路有功功率的分布规律构造了直流线路势能函数;其次,构建了针对直流线路势能的稳定性判别指标,定量分析了混联系统的受扰程度和割集位置;最后,仿真计算改进后的新英格兰10机39节点系统,结果表明直流线路位置不同,其势能的稳定性不同,并且直流线路的接入不改变系统的割集分布,所提指标能够有效量化评估交直流混联电力系统的暂态稳定性。The transient stability of AC-DC hybrid power system can be analyzed by using the running trajectory of network variables,which can show the analysis results more intuitively and provide a theoretical basis for local control of state stability.Firstly,based on the network structure,the transient energy function suitable for hybrid system is constructed,and the transient potential energy function of DC line is constructed according to the distribution law of DC line active power.Secondly,the stability judgment index for the DC line transient potential energy is constructed,and the disturbance degree and cut set position of hybrid system are analyzed quantitatively.Finally,the improved New England 10-machine 39-bus system is simulated,the results show that the stability of transient potential energy varies with the location of DC line,and the access of DC line does not change the cut set distribution of the system.The index proposed in this paper can effectively and quantitatively evaluate the transient stability of AC-DC hybrid power system.

关 键 词：交直流混联电力系统 暂态稳定评估 支路暂态势能 稳定度指标 振荡割集 

分 类 号：TM712[电气工程—电力系统及自动化]