输电线路智能地线管控系统的研制与应用

Development and application of intelligent ground line control system for transmission line

为了提高输电线路智能地线管控能力,构建输电线路智能地线管控系统,提出基于虚拟同步控制的输电线路智能地线管控系统,建立了矢量控制下输电线路智能地线管控等效电路模型。采用T型等效电路分析的方法进行输电线路智能地线管控的系统稳定性特征分析,求得输电线路智能地线管控的优化参数结构模型。基于虚拟同步控制方法,进行输电线路智能地线子侧变流器的控制结构优化,采用最大功率跟踪的方法进行智能地线管控系统的控制指令加载,实现输电线路电压定向管控,构建优化的输电线路智能地线管控系统。仿真结果表明,采用该方法进行输电线路智能地线管控的智能性较好,稳定控制能力较强,提高了输电线路智能地线管控的无功环比例积分控制能力。

In order to improve the intelligent ground line control ability of transmission line,the intelligent ground line control system of transmission line is constructed.The intelligent ground line control system based on virtual synchronous control is proposed.The equivalent circuit model of intelligent ground line control of transmission line under vector control is established.The system stability characteristic of intelligent ground line control is analyzed by using the method of T-type equivalent circuit analysis,and the optimized parameter structure model of intelligent ground line control of transmission line is obtained.Based on virtual synchronous control method,the intelligent ground line of the transmission line is carried out,and the maximum power tracking method is used to load the control instruction of intelligent ground line control system,realize the directional control of transmission line voltage and construct the optimal control structure of the system.The simulation results show that the intelligent ground line control system with this method is more intelligent,and the stable control ability is stronger,which improves the reactive power loop proportional integral control ability of intelligent ground line control of transmission line.