基于时域仿真法的大扰动下船舶电站暂态稳定分析

Transient stability analysis of ship power station under large disturbance based on time domain simulation

针对目前普遍采用的低阶同步发电机数学模型在大扰动下船舶电站暂态稳定分析中计算误差大的缺陷,以及MATLAB算法受限且仿真时间过长的不足,应用时域仿真法,综合同步发电机、柴油机及其调速系统、励磁系统以及负荷数学模型建立船舶电站高阶非线性模型,并用隐式梯形积分法的C#.NET程序求解非线性微分代数方程组.比较大扰动前后发电机转速和端电压动态仿真曲线,其各项性能指标均在规范误差范围内.

Aiming at the disadvantages of big calculative error of low-order synchronous generator model currently widely used in transient stability analysis under large disturbance,limited MATLAB method and too long simulation time,the high-order nonlinear model of ship power station was established combining nonlinear mathematical models of generator,diesel engine and governor system,as well as excitation system and load using time domain simulation.The implicit trapezoidal integration method was selected to solve nonlinear differential algebraic equations with C#.NET program instead of time-consuming MATLAB.The simulation curves of rotor speed and voltage disturbance pre and post were compared,and results show that each performance index is within standard error range.