基于直流法电网随机潮流分析方法.doc

这是大学本科毕业设计论文，文章论述了用随机潮流法进行分析电网的故障，采用数学模型


摘要
  电力系统运行中存在大量的不确定因素，如负荷波动、发电机故障停运及输电元件故障等等。一般的潮流计算不但计算量很大而且很难反映全面的情况。概率潮流计算运用了概率统计方法处理系统运行中的随机变化因素，并且得出了和实际情况相近的随机出现的概率值。
首先，本文介绍潮流计算的直流法，其中包括直流法的步骤，直流法的模型，直流法的计算。而本文主要运用的是直流法的计算方法，来计算电力系统中的潮流。
其次，介绍了随机潮流的基本概念，随机潮流的一些计算方法，如：蒙特卡罗仿真随机潮流算法，保留非线性的电力系统随机潮流算法，半不变量法潮流计算等。
最后，本文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。

Abstract
There are many uncertain factors in power system operation, such as fluctuation of loads, the forced outage of generation and the fault in transformer equipments. the generalized power flow needs much computation and is hard to reflect the all-around conditions，and the actual situation and come to a similar value of the probability of a random.
First of all, this paper flow calculation of the DC law, including the steps of DC, DC law model, the DC method of calculation. The paper is the use of the DC law method of calculation to calculate the power system in the trend.
Secondly, on the basic concept of random trend, the trend of the number of random calculation methods, such as: Monte Carlo simulation randomly trend algorithm, to retain the power system of nonlinear stochastic trend algorithm, semi-invariant of the trend calculation.
Finally, DC Monte Carlo simulation methods and algorithms were the trend of combining the steps, using MATLAB programming language programming algorithms, and pre-PSASP calculated by the trend results were compared to the results so far tend to convergence.