摘要
为解决特高压直流输电引起的直流偏磁现象,提出了在直流偏磁条件下,基于复杂网络理论的送端电网关键站点识别方法。在PSCAD中建立自耦变压器模型,进行变压器直流偏磁仿真研究,为治理酒泉地区变电站中存在的直流偏磁,基于实际电网结构参数建立仿真模型,对受偏磁电流影响大的关键站点进行识别治理,定义节点熵和线路熵的概念,其大小反映被治理地区节点电流和线路电流分布是否均匀,规定直流偏磁治理标准,用以评判治理效果是否合格。仿真结果表明,进行关键站点识别与治理后,节点熵和线路熵有明显的下降,该地区的总偏磁电流得到了有效抑制。
For solving the phenomenon of DC bias due to UHVDC transmission,a method for identifying key sites in the transmission-end power grid based on complex network theory under DC bias conditions is proposed.PSCAD is used to set up the autotransformer model and conduct the DC bias simulation study of transformer.In order to control the DC bias existing in the substations in Jiuquan area,the simulation model is set up based on the structure parame-ters of actual grid so to identify and control the critical site which is subjected to the large influence of the bias cur-rent.The concept of node entropy and line entropy is defined of which its size reflects whether the node current and line current distribution in the governed area is uniform,and the DC bias control standard is specified so to judge whether the control effect is qualified.The simulation results show that after identifying and managing the key sites,the node entropy and line entropy have decreased significantly and the total bias current in the area has been effec-tively suppressed.
作者
党存禄
马雄文
DANG Cunu;MA Xiongwen(College of Electrical and Information Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Key Laboratory of Gansu Province Advanced Control for Industrial Processes,Lanzhou 730050,China;National Experimental Teaching Demonstration Center of Electrical and Control Engineering of Lanzhou University of Technology,Lanzhou 730050,China)
出处
《高压电器》
CAS
CSCD
北大核心
2024年第4期193-198,共6页
High Voltage Apparatus
基金
国网甘肃省电力科学研究院资助项目(SGGSKY00DJJS1900216)。
