基于模糊-内模双环控制的船岸并网系统  

Shore-to-ship Grid-connected Power Supply System Based on Fuzzy-logic and Internal Model Control

作　　者：仝新峰 胡安平 刘浩军 黄平 孟珺遐[3] 李守翔 TONG Xin-feng;HU An-ping;LIU Hao-jun;HUANG Ping;MENG Jun-xia;LI Shou-xiang(State Grid Hami Electric Power Supply Company, Hami 839099, China;Cross-strait Tsinghua Research Institute, Xiamen 200233, China;China Electric Power Research Institute, Beijing 100192, China;College of Automation, Beijing Institute of Technology, Beijing 100081, China)

机构地区：[1]国网哈密供电公司,哈密839099 [2]清华海峡研究院,厦门200233 [3]中国电力科学研究院,北京100192 [4]北京理工大学自动化学院,北京100081

出　　处：《科学技术与工程》2021年第34期14561-14569,共9页Science Technology and Engineering

摘　　要：针对靠港船舶与岸电装置并网失电、并网电压跌落、频率不稳定以及并网环路电流大等问题,提出了一种基于下垂原理的外环模糊控制与内环内模控制相结合的逆变器的船岸并网系统,实现靠港船舶与岸电的柔性并网,即并网冲击可控、负载平稳转移,保证负荷不断电情况下实现平滑切换。对船岸并网系统整体过程进行设计与仿真:整流侧使用三相脉冲宽度调制(pulse width modulation,PWM)闭环控制;逆变环节采用基于下垂原理的模糊比例积分(proportional integral,PI)电压外环、内模电容电流内环的双环控制结构;船舶供电系统采用同步发电机模型。仿真结果表明:直流侧电压输出稳定并可调,高低压上船方式可调范围分别为500~1000 V、1200~2000 V;并网电流谐波含量分别为0.35%、0.40%;并网电压幅值、频率稳定且实现负荷平稳转移。In order to solve the problems of power outage,voltage drop,frequency instability and high current in the grid connection loop,a shore-to-ship grid-connected system based on the droop control with the combination of fuzzy control and internal model control was proposed.By adopting the proposed control strategy,the flexible grid-connection between shore power and cruise ship can be realized,which means the grid-connection impact is controllable,the load transfer being stable and smooth.The complete process of shore to ship grid-connected system was designed and simulated.The rectifier used three-phase pulse width modulation(PWM)technology.Based on droop principle,the inverter adopted the double loop control structure which consists of fuzzy proportional integral(PI)for voltage loop and internal model control(IMC)for capacitor current loop.The power system in the cruise ship adopted synchronous generator model.The simulation results show that the output voltage of the dc link is stable and adjustable.The adjustable range of the high-voltage and low-voltage embarkation mode is 500~1000 V and 1200~2000 V,respectively.The harmonic content of the grid-connected current is 0.35%and 0.40%,respectively.The voltage amplitude and frequency are stable and the load can be transferred smoothly from ship to shore.

关 键 词：柔性并网 内模控制 模糊比例积分控制 同步发电机 

分 类 号：TM464[电气工程—电器]