基于水-机-电耦合模型的机组励磁优化控制  

Optimal control of excitation system of pumped storage unit based on hydraulicmechanical-electrical coupling model

作　　者：许颜贺 赵坤杰 吕聪 周建中[1] XU Yanhe;ZHAO Kunjie;LYU Cong;ZHOU Jianzhong(School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学土木与水利工程学院,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2021年第12期28-33,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：湖北省自然科学基金面上项目(2020CF819);国家自然科学基金青年基金资助项目(51809099)。

摘　　要：围绕抽水蓄能机组低水头开机过程励磁系统优化调控问题,建立了包含带调压室的引水系统、非线性水泵水轮机、七阶同步发电机与自并励静止励磁系统的机组水-机-电耦合模型,分析了机组低水头开机运行进入S特性区时系统水-机-电耦合作用动态特性.设计了针对该工况的励磁系统模糊分数阶比例-积分-微分(PID)励磁控制器,引入菌群觅食趋化性-引力搜索算法进行控制参数优化.实验结果表明:相比于传统PID控制系统和自并励静止励磁系统,模糊分数阶PID控制系统可抑制抽水蓄能机组励磁系统在低水头开机进入不稳定区域发生剧烈低频振荡,显著提高了励磁控制品质,且具有较强的鲁棒性.Around pumped storage unit(PSU)excitation system(ES)low head boot process optimizing control problem,a refined model of hydraulic-mechanical-electrical coupling for the PSU was established,which includes the water diversion system with surge tank,the pump-turbine with full characteristic curve projection transformation,the seventh-order synchronous generator and the self shunt static ES.Furthermore,a fuzzy fractional-order PID(proportional integral derivative)excitation controller was designed for the ES in this condition,and the control parameters were optimized by using the chemotaxis and gravitation search algorithm.The experimental results show that compared with the traditional PID control system and the self shunt static ES,the fuzzy fractional-order PID control system can effectively suppress the severe low-frequency oscillation of the ES of the PSU in the unstable region of the low water head start-up condition,and significantly improve the excitation control quality,and has a strong robustness.

关 键 词：抽水蓄能机组 低水头开机 水-机-电耦合模型 模糊分数阶PID控制 励磁控制 

分 类 号：TV743[水利工程—水利水电工程] TV734.4