摘要
针对多端星形电磁环网低压侧支路建立的电流分析模型,解析了端节点电压分布与电磁环网低压侧各节点负荷分布对电磁环网低压侧各支路电流的影响。模型中,电磁环网低压侧支路电流包含为所在臂下游节点供电的电流分量、由于该臂上各节点到端节点距离不同而产生的附加电流分量、高压侧输电分流到低压侧并占用低压侧线路容量的传输电流分量以及中心点和其他臂负荷分布对该臂的影响产生的电流分量。此外,模型所得支路电流对各电流分量的灵敏度表明,使端节点电压幅值增大或相角提前,或向该节点方向倒负荷,将抬高该端节点所在臂,并改变其他臂的支路电流,其中位于相同臂上的支路电流的变化量相等。上述结论解析了多端星形电磁环网的潮流变化规律和控制方法,可为这种复杂电磁环网的稳态控制提供决策依据。
Based on the current analysis model of the low-voltage side branch of the multi-terminal star electromagnetic ring network,the influence of the voltage distribution at the end nodes and the load distribution at the low-voltage side of the electromagnetic ring network on the current of the low-voltage side branches of the electromagnetic ring network is analyzed.In the model,the low-voltage side branch current of the electromagnetic ring network includes the current component that supplies power to the downstream nodes of the arm,the additional current component caused by the different distance from each node on the arm to the end node,the transmission current component that the high-voltage side transmission is diverted to the low-voltage side and occupies the line capacity of the low-voltage side,and the current component generated by the influence of the load distribution of the center point and other arms on the arm.In addition,the sensitivity of the branch current obtained by the model to each current component shows that increasing the voltage amplitude of the terminal node or advancing the phase angle,or reversing the load in the direction of the node will raise the arm where the terminal node is located,and change the branch current of other arms,among which the branch current on the same arm changes equally.The above conclusions analyze the power flow variation law and control method of the multi-terminal star electromagnetic ring network,which can provide the decision basis for the steady-state control of the complex electromagnetic ring network.
作者
杨溢
薛涛
赵斌
李西明
刘超
YANG Yi;XUE Tao;ZHAO Bin;LI Ximing;LIU Chao(Shenyang Power Supply Company,State Grid Liaoning Electric Power Co.,Ltd.,Shenyang 110000,China)
出处
《内蒙古电力技术》
2022年第6期57-63,共7页
Inner Mongolia Electric Power
关键词
复杂电磁环网
潮流分布
多端星形拓扑
矩电流
传输电流
complex electromagnetic loop network
power flow distribution
multi-terminal star-topology
moment current
transport current
