船用LNG发动机与废气-燃料重整器联合运行控制策略  

Joint Operation Control Strategy of Marine LNG Engine and Exhaust-Fuel Reformer

作　　者：林旺 董东升 魏文文 王勤鹏[1] 张尊华[1,2] LIN Wang;DONG Dongsheng;WEI Wenwen;WANG Qinpeng;ZHANG Zunhua(Wuhan University of Technology,School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan 430036,China;Wuhan University of Technology,New Energy and Green Technology Aquatic Application Hubei Engineering Research Center,Wuhan 430036,China)

机构地区：[1]武汉理工大学船海与能源动力工程学院,武汉430063 [2]武汉理工大学新能源与绿色技术水上应用湖北省工程研究中心,武汉430063

出　　处：《船舶工程》2025年第3期61-70,共10页Ship Engineering

基　　金：国家自然科学基金(51979212)。

摘　　要：[目的]为了提高船用液化天然气(LNG)发动机性能,降低污染物排放,[方法]提出一种模糊算法与传统比例-积分-微分(PID)控制相结合的控制策略,用以解决船用LNG发动机与废气-燃料重整器联合运行过程中控制性能差的问题。通过Simulink与GT-Power软件构建联合仿真模型,研究控制策略将重整器反应物入口CH_(4)和O_(2)体积分数的比值(φ(CH_(4))/φ(O_(2)))与废气-燃料重整再循环(REGR)率控制在重整反应最佳值。[结果]仿真结果表明,比例控制系数为10的PID控制器可实现不同发动机工况下φ(CH_(4))/φ(O_(2))稳定在2左右。REGR率因其影响因素多,选取合适的比例和积分系数的PID控制器困难,利用模糊算法可实现PID参数自整定,有效减少REGR率的超调,且不同工况下模糊PID控制器能快速达到目标REGR率,具有良好的稳态和动态性能,性能优于传统PID控制器。[结论]研究结果可为REGR控制系统开发提供解决方案,加快REGR技术的应用。[Purpose]In order to improve the performance of marine liquefied natural gas(LNG)engine and reduce the emission of pollutants,[Method]a control strategy combining fuzzy algorithm and traditional proportional-integral-derivative(PID)is proposed to solve the problem of poor control performance during the joint operation of marine LNG engine and exhaust-fuel reformer.A co-simulation model is built by Simulink and GT-Power software to study the control strategy which is to find the ratio of reformer inlet CH_(4) to O_(2) volume fraction(φ(CH_(4))/φ(O_(2)))value and reformed exhaust gas recirculation(REGR)rate to realize the best reforming reaction condition of the reformer.The simulation results show that the PID controller with a proportional control coefficient of 10 can stabilize theφ(CH_(4))/φ(O_(2))value at about 2 under different engine operating conditions.Due to many factors affecting the REGR rate,it is difficult to select a PID controller with appropriate proportion and integral coefficients.[Result]The fuzzy algorithm can realize self-tuning of the PID parameters and effectively reduce the overkill of the REGR rate.In addition,the fuzzy PID controller can quickly reach the target REGR rate under different working conditions and has good steady-state and dynamic performance,which is better than the traditional PID controller. [Conclusion] The research results can provide a solution for the development of REGR control system and accelerate the application of REGR technology.

关 键 词：船用液化天然气(LNG)发动机 重整再循环 模糊比例-积分-微分(PID) 

分 类 号：U662.9[交通运输工程—船舶及航道工程]