大型船舶电力系统的静态电压稳定分析

Static Voltage Stability of Power System for a Large Ship

本文主要对船舶电力系统的静态电压稳定性进行分析,提出了两个能分别衡量有功越限及无功越限导致的静态电压失稳的指标。文中利用ETAP软件详细建立了典型的船舶中压系统模型,在潮流分析的基础上分别计算了各种不同船舶工况下有功静态电压稳定指标及无功静态电压稳定指标,对船舶电网的静态电压稳定性进行分析。仿真分析结果表明船舶电力系统无功不足引起电压失稳可能性较有功大。总体说来,船舶电网的静态电压相对比较稳定,设计中应主要注意大容量冲击负荷导致的船舶电网的电压暂态稳定。

Focused on the static voltage stability of marine power system,two new static voltage stability indexes（SVSI） are proposed to scale the real power margin and reactive power margin.A typical middle voltage marine power system is established to calculate the power flow by ETAP.Based on that,the real power static voltage stability index（SVSIP） and reactive power static voltage stability index（SVSIQ） of different work condition are obtained.Simulation results show that inadequate reactive power may easily cause the static voltage instability than inadequate real power.The static voltage stability margin of marine power system is too large to take the static voltage stability into main consideration.More attention must be paid to the transient voltage instability which will be caused by the surging load.