摘要
　　　
　　　对于电力系统控制问题而言，其主要目的是通过改善系统调节装置来提高系统稳定水平。目前控制器的设计一般都是针对某种条件进行，然后再在少数几种扰动条件下稳定校验。然而人们更关心控制器在整个运行范围内对各种扰动的效果。由于系统的运行条件及扰动具有随机性，在控制器设计及校验时若能计及这些影响将会使控制器具有良好的运行效果。
　　　本文分别采用NR法和PQ分解法计算潮流，观察NR法计算潮流中雅可比矩阵的变化情况，分析两种方法计算潮流的优缺点；分析系统潮流情况，包括电压幅值、相角，线路过载情况以及全网有功损耗情况。计算IEEE30节点电网各节点电压和线路潮流的统计特征和分布，最后用直流方法和蒙特卡罗仿真随机潮流算法相结合的步骤，采用MATLAB程序语言编写程序算法，和前期PSASP计算出来的潮流结果进行比较，使其结果趋于收敛为止。
　　　
　　　关键词：计算潮流；MATLAB；IEEE30节点
　　　
　　　

Abstract
　　　For power system control problems, its main purpose is to adjust the means to improve system stability by improving the system. Controller design are generally for certain conditions, and then in a few disturbance conditions stable calibration. However, people are more concerned about the effect of the controller disturbances in the entire operating range. Due to the randomness of the system operating conditions and disturbances, the controller design and verify if taking into account these effects will make the controller has good operating results.
　　　In this paper, the NR method and the PQ decomposition calculation of the trend observed NR Jacobian matrix computing trend analysis of the advantages and disadvantages of the two methods of calculation of the trend; trend of the analysis system, including voltage amplitude, phase angle, line overload and power loss. Calculated IEEE30 bus grid node voltage and line the trend of the statistical characteristics and distribution, and finally a combination of DC method and Monte Carlo simulation probabilistic load flow algorithm step programming algorithm using MATLAB programming language, and the early PSASP calculated trend compare its results converge so far.
　　　
　　　Keywords: calculation of the trend; MATLAB; IEEE30 node