管道电流测绘交流恒流源双环控制策略研究  

Research on dual-loop control strategy of AC constant current source for pipeline current mapping

作　　者：吴鹏宇 杨勇[2] 任旭虎[1] 闫宇晴 闫臣熙 WU Pengyu;YANG Yong;REN Xuhu;YAN Yuqing;YAN Chenxi(School of Ocean and Space Information,China University of Petroleum(East China),Qingdao 266580,China;Technical Testing Center of Sinopec Shengli Oilfield Branch,Dongying 257000,China)

机构地区：[1]中国石油大学(华东)海洋与空间信息学院,山东青岛266580 [2]中国石化胜利油田分公司技术检测中心,山东东营257000

出　　处：《现代电子技术》2024年第20期65-71,共7页Modern Electronics Technique

基　　金：穿越管道强电流探测设备(YKF2305)。

摘　　要：为解决埋地输油管道阻容性负载对恒流源的影响,结合交流恒流源模型,针对传统电压电流双闭环控制在应对阻容性负载时,出现的输出波形失真问题展开研究,提出一种管道电流测绘交流恒流源双环控制策略。在内环控制方面,采用电感电流瞬时反馈和负载电流前馈的PI控制策略;对于外环控制,采用负载电压反馈的PI控制策略。为进一步完善系统性能,运用极点配置法对控制器参数进行设计,以实现更加精准的控制,并通过Matlab进行频域特性分析和Simulink仿真验证。结果表明:经过优化的控制策略能够有效抑制阻容性负载条件下的电压波形畸变,同时在阻性负载和阻容性负载条件下的输出电流均显示出良好的正弦性,总谐波失真率分别为2.26%和3.19%,具备良好的动态性能和鲁棒性,可为埋地输油管道输油系统的检测提供坚实的技术基础。In allusion to the problem of output waveform distortion in traditional voltage current dual loop control when dealing with resistive and capacitive loads,a dual-loop control strategy of AC constant current source for pipeline current mapping is proposed by combing with AC constant current sources model to address the impact of resistive and capacitive loads on constant current sources in buried oil pipelines.In terms of inner loop control,a PI control strategy using inductor current instantaneous feedback and load current feed-forward is adopted.In terms of outer loop control,a PI control strategy based on load voltage feedback is adopted.In order to further improve the system performance,the pole configuration method is used to design the controller parameters,so as to realize more accurate control.The frequency domain characteristic analysis and Simulink simulation verification are conducted by Matlab.The results show that the optimized control strategy can effectively suppress voltage waveform distortion under resistive capacitive load conditions,and the output current under both resistive and capacitive load conditions can exhibit good sinusoidal characteristics.The total harmonic distortion rates are 2.26%and 3.19%,respectively,with good dynamic performance and robustness,providing a solid technical foundation for the detection of oil transportation systems in buried oil pipeline.

关 键 词：恒流源 双环控制 管道电流测绘系统 埋地输油管道 电流前馈 PI控制 极点配置法 

分 类 号：TN876-34[电子电信—信息与通信工程]