摘要
应用三维有限元方法分析了典型船用低压断路器脱扣器的电磁特性,得到了衔铁电磁转矩与电流及工作气隙间的定量关系,再结合机械运动方程和开关电弧数学模型,基于PSCAD/EMTDC建立低压断路器仿真模型,并通过实验验证模型的正确性。在此基础上,建立典型船舶配电系统仿真模型,通过典型短路故障仿真,分析断路器动态特性及其保护参数整定对保护选择性的影响。结果表明,提出的方法可有效分析和优化船舶电力系统保护性能。
In this paper, the electromagnetic characteristics of magnetic trip in typical shipboard low- voltage circuit breakers are analyzed, and the electromagnetic torque on armature of magnetic trip which varied with the current and air gap are calculated. The calculation results are integrated with motion equations and arc model to build simulation models of circuit breakers based on PSCAD/EMTDC. The results of experiments have verified the model. Then, a simulation model of a typical shipboard power system using the circuit breakers model are built to analyze the influence of dynamic characteristics and protection parameters setting of circuit breakers to that the proposed method can be used to analyze selective protection for the power system. It demonstrates and optimize the protection performance of the shipboardpower system.
出处
《舰船科学技术》
北大核心
2015年第12期93-99,共7页
Ship Science and Technology
基金
国家自然科学基金资助项目(51207165)
关键词
船舶电力系统
低压断路器
动态特性
保护选择性
shipboard power system
low voltage circuit breaker
dynamic characteristics
protection selectivity
