摘要
综合电力系统是船舶电力系统的发展方向,系统中含有大量的电力电子设备,在某些特殊运行工况下,基于逆变器并联供电系统可能会产生并联谐振问题。虽然通过合理设计逆变器参数可保证单台逆变器的稳定运行和局部谐振的发生,但本地负载、输电线缆、电网参数等系统参数不匹配会产生全局性谐振,尤其是在船舶不同工况转换下,逆变器并联谐振网络的电网耦合阻抗参数差异很大。另外,随着并联逆变器数量的增加,系统非固定谐振点的频率会被拉低。文章建立谐振网络模型,分析逆变器本体谐振、逆变器并联谐振产生的局部谐振和并联逆变器与负载网络之间产生的全局性谐振,提出了谐振点的近似计算方法,通过理论研究得到工程实用性结论,为中压直流综合电力系统的设计提供了参考。
Integrated power system is the development direction of marine power system,which contains a large number of power electronic equipment.Under some special operating conditions,the parallel resonant problem may occur in parallel power supply system made up of inverters.By reasonable design of inverter parameters while guaranteeing the stable operation of single inverter and the local resonance occurs,but local load,system parameters,such as transmission cables,power grid parameter mismatch can produce resonance,global transformation under different working conditions,especially in the ship,inverter power grid coupling impedance parameters of the parallel resonant network difference is very big.In addition,with the increase of the number of parallel inverters,the frequency of the system’s non-fixed resonance point will be reduced.In the paper,the resonant network models are established,analyzing the resonant inverter ontology,the local resonance and parallel inverters parallel resonant inverter with global resonance between the load network,puts forward the approximate calculation method of the resonance point.The engineering practical conclusion is obtained by theoretical study.It provides the reference for the design of medium voltage DC power system.
作者
王英
吴菁
吴国栋
庞宇
WANG Ying;WU Jing;WU Guodong;PENG Yu(Equipment Project Management Center of Naval Armament Department,Beijing 100000,China;Marine Design and Research of China,Shanghai 200011,China;Shanghai Marine Equipment Research Institute,Shanghai 200031,China)
出处
《船舶工程》
CSCD
北大核心
2020年第5期84-89,共6页
Ship Engineering
关键词
综合电力系统
低压交流配电网
逆变器并联
谐振
integrated power system
low voltage AC distribution network
inverter parallel
resonance
