基于改进PR控制器的电网单相接地装置故障消弧方法  

Arc Suppression Method for Single-phase Grounding Device Faults in Power Grid Based on Improved PR Controller

作　　者：金鑫 贺兴安 赵振北 何丽娟 JIN Xin;HE Xing’an;ZHAO Zhenbei;HE Lijuan(Yinchuan Power Supply Company of State Grid Ningxia Electric Power Co.,Ltd.,Yinchuan 750000,China)

机构地区：[1]国网宁夏电力有限公司银川供电公司,银川750000

出　　处：《自动化与仪表》2024年第12期119-122,127,共5页Automation & Instrumentation

摘　　要：为快速触发消弧控制动作,迅速消除接地故障,减少故障持续时间,研究改进PR控制器的电网单相接地装置故障消弧方法。此方法主要利用消弧的模式,在单相接地消弧装置中,设计PI+重复控制器为内环控制装置,改进后的PR控制器为外环控制装置;在电流内环控制中,PI+重复控制器确保电流内环能够快速、准确地跟踪参考电流,实现对故障电流的精确注入补偿;在外环控制中,改进后PR控制器在电流内环注入补偿电流的基础上,进一步控制中性点电压,使得配电网故障所在相的电压值为零,实现电网单相接地的可靠消弧控制。实验结果显示,此方法具备快速且精确的消弧控制能力。In order to quickly trigger the arc suppression control action,quickly eliminate grounding faults,and reduce the duration of faults,a fault arc suppression method for single-phase grounding devices in the power grid is studied by improving the PR controller.This method mainly utilizes the arc suppression mode.In the single-phase grounding arc suppression device,a PI+repetitive controller is designed as the inner loop control device,and the improved PR controller is the outer loop control device.In the current inner loop control,the PI+repetitive controller ensures that the current inner loop can quickly and accurately track the reference current,achieving precise injection compensation for fault current.In the outer loop control,the improved PR controller injects compensation current into the current inner loop and further controls the neutral point voltage,making the voltage value of the phase where the fault occurs in the distribution network zero,achieving reliable arc suppression control of single-phase grounding in the power grid.The experimental results show that this method has fast and accurate arc suppression control capability.

关 键 词：快速触发 单相接地故障 消弧装置 PI+重复控制器 改进PR控制器 

分 类 号：TM76[电气工程—电力系统及自动化]