某船电力系统大功率负载启动仿真分析  

Simulation and Analysis of High-power Load Startup of a Ship’s Power System

作　　者：左红稳[1] 李华兵[1] 肖海瑞[1] 傅振宇[1] Zuo Hongwen;Li Huabing;Xiao Hairui;Fu Zhenyu(China Satellite Martine Tracking and Control Department,Jiangyin 214431,Jiangsu,China)

机构地区：[1]中国卫星海上测控部

出　　处：《船电技术》2019年第12期10-15,共6页Marine Electric & Electronic Engineering

摘　　要：以某船电力系统为对象,基于MATLAB建立了该船的电力系统仿真模型,并仿真分析了典型工况下大功率负载启动对电网动态特性的影响。分析结果表明,在两台机组并网工况下,冷水机组启动时,导致发电机转速下降4.8%,电压下降3.4%,其启动电流达1300 A;三台机组并网时,艏侧推启动使发电机转速下降5.2%,电压下降4.6%,其启动电流达到约1600 A。在有限的船舶电力系统容量下,大型负荷启动会对电网产生较大的冲击,造成电网电压突降和频率波动,当负载功率增大到一定程度时,会导致电力系统供电品质不满足船舶电力系统标准要求,需要增大机组容量或采取措施降低冲击的影响。研究对船舶海上作业合理安排机组在网及有针对性开展设备维修有指导意义。Taking a ship's power system as the modeling object,the power system simulation model of the ship is established based on MATLAB.The influence of high power load start on the dynamic characteristics of the grid under typical conditions is analyzed.The simulation results show that under the condition of two generator sets running in parallel,the generator rotation speed and voltage decrease by 4.8%and 3.4%,the starting current reaches 1300A at the chiller starting;and that under three generator sets running in parallel the generator speed and voltage decrease by 5.2%and 4.6%respectively,the starting current reaches about 1600A While the bow thruster is starting.Due to limited power system capacity,step load of high power causes a large impact on the power system,with the voltage drop and frequency fluctuation brought out,even to the extent that the power supply quality of the power system might deteriorate.so that the added generating capacity is demanded or necessary anti-impact measures should be taken.The simulation analysis can provide support for reasonably setting the generator sets running on and also is of the reference value for equipment maintenance of the power system.

关 键 词：大功率负载 MATLAB 电力系统 稳定性 

分 类 号：U665.12[交通运输工程—船舶及航道工程]