内容：
基于 MATLAB 的电力系统仿真
摘   要： 目前，随着科学技术的发展和电能需求量的日益增长，电力系统规模越来越庞大，超高压远距离输电、大容量发电机组、各种新型控制装置得到了广泛的应用，这对于合理利用能源，充分挖掘现有的输电潜力和保护环境都有重要意义。另一方面，随着国民经济的高速发展，以城市为中心的区域性用电增长越来越快，大电网负荷中心的用电容量越来越大，长距离重负荷输电的情况日益普遍，电力系统在人民的生活和工作中担任重要角色，电力系统的稳定运行直接影响的人们的日常生活。随着电力系统的飞速发展和电网的日益扩大以及自动化程度的不断提高，电力系统中许多计算和控制问题日益复杂，从技术和安全上考虑直接进行电力试验可能性很小，因此迫切要求运用电力仿真来解决这些问题。电力系统仿真是将电力系统的模型化、数学化来模拟实际的电力系统的运行，可以帮助人们通过计算机手段分析实际电力系统的各种运行情况 , 从而有效了解电力系统概况。
本文根据电力系统的特点，利用 MATLAB 的动态仿真软件 Simulink 搭建了含发电机、变压器、输电线路、无穷大电源等的系统的仿真模型，得到了在该系统主供电线路电源端发生三相短路接地故障并由故障器自动跳闸隔离故障的仿真结果，并分析了这一暂态过程。通过仿真结果说明 MATIAB 电力系统工具箱是分析电力系统的有效工具。
关键词： 电力系统；三相短路；故障分析； matlab 仿真
Electric Power System Simulation Base on MATLAB
Abstract ：  Now, with the development of science and techmology and the growing demand for eletrical energy, power systems get increasingly large and long-distance EHV power transmission, large capacity electric generating set, as well as the various new control devices widely used. This the other is rising more and more rapidly, power demand in large electric system’ laod centers is growing faster and faster, and long-distance and is more and more popular. Power system play an important part in people’s lives and work, power system and stable operation of a direct impact on the people’s daily life, with the rapid development of power systems and power grids is increasing with days and the degree of automation continuous improvement, many computing and control of the power system increasingly complex issues, it is impossioble to take a direct
This paper base on the characteristics of the power system, using the software MATAB simulink built with generators,transformers,power line,such as the infinite power system simulation model, and result of three-phase short-circuit fault which in the main power-supply line and the fault automatic tripping isolation by the three-phase fault, and analysis of this transient. The simulation results show MATLAB power system toolbox of the power system is an effective tool.
Key words: Power system  ； Three-phase short-circuit  ； Fault analysis  ； MATLAB simulation

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