摘要
为解决故障扰动对集成并网型交直交电源的船舶电力系统暂态稳定性的不确定性影响问题,在电力系统计算机辅助设计(power system computer aided design,PSCAD)软件中构建集成并网型交直交电源的船舶交直流混联电力系统仿真模型,以电力系统电压、频率以及功角稳定理论为基础,探讨短路故障和突变负载扰动时的电力系统特征参数变化规律,分析短路故障和突变负载扰动时虚拟惯量对系统频率稳定性的支撑作用。结果表明:短路时的系统特征参数变化更剧烈,突变负载扰动时的电压波动为短路时的18.2%;突变负载扰动时虚拟同步发电机(virtual synchronous generator,VSG)控制策略下功率仅需1.1 s稳定,恒功率控制策略下始终不稳定;当虚拟惯量为2 kg·m 2时VSG控制策略能够为系统提供-1.750~2.297 kW的惯量支撑功率。该研究结果可为并网型交直交电源在船舶电力系统中的应用提供理论指导。
The fault and disturbance has uncertainty influences on the transient stability of the ship power system integrated with grid-connected AC-DC-AC power supply.In order to solve this problem,a simulation model of ship AC/DC hybrid power system integrated with grid-connected AC-DC-AC power supply is established in the power system computer aided design(PSCAD)software.Based on the theory of voltage,frequency and power angle stability of the power system,the variation law of characteristic parameters of the power system under short-circuit fault and sudden load disturbance is discussed,and the supporting effects of virtual inertia on the system frequency stability under short-circuit fault and sudden load disturbance are analyzed.The results show that the characteristic parameters of the system under short-circuit fault change more dramatically,and the voltage fluctuation under sudden load disturbance is 18.2%of that under short circuit;when the sudden load is disturbed,the power of virtual synchronous generator(VSG)strategy is stable within only 1.1 s,and it is always unstable under the active and reactive power control strategy;when the virtual inertia is 2 kg·m 2,the VSG control can provide-1.750~2.297 kW of inertia support power for the system.The research results can provide theoretical guidance for the application of grid-connected AC-DC-AC ship power supply system.
作者
孙玉伟
刘勇
吴健
袁成清
汤旭晶
SUN Yuwei;LIU Yong;WU Jian;YUAN Chengqing;TANG Xujing(School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,Hubei,China;National Engineering Research Center for Water Transportation Safety,Wuhan University of Technology,Wuhan 430063,Hubei,China;Key Laboratory of Marine Power Engineering&Technology of Ministry of Transport,Wuhan University of Technology,Wuhan 430063,Hubei,China;School of Transportation and Logistic Engineering,Wuhan University of Technology,Wuhan 430063,Hubei,China)
出处
《上海海事大学学报》
北大核心
2023年第4期104-110,共7页
Journal of Shanghai Maritime University
基金
国家电网有限公司科技项目(52094021N00R)。
关键词
船舶电力系统
并网型交直交电源
暂态稳定性
虚拟同步发电机
虚拟惯量
ship power system
grid-connected AC-DC-AC power supply
transient stability
virtual synchronous generator(VSG)
virtual inertia
