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摘 要
潮流计算是电力系统最基本最常用的计算。根据系统给定的运行条件，网络接线及元件参数，通过潮流计算可以确定各母线的电压（幅值和相角），各支路流过的功率，整个系统的功率损耗。潮流计算是实现电力系统安全经济发供电的必要手段和重要工作环节。因此，潮流计算在电力系统的规划计算，生产运行，调度管理及科学计算中都有着广泛的应用。
潮流计算在数学上是多元非线性方程组的求解问题，求解的方法有很多种，当系统相对简单，节点数相对较少时，我们可以通过手算获得各参数，但当系统网络较复杂时，想要通过手算各参数显然是不可能的，这就为计算机算法的出现提出了要求。
本文用C语言或Matlab语言编制电力系统潮流计算程序，能对含有环网的较复杂电网进行潮流计算，输出结果包括节点电压（标幺值和有名值）、支路电流和视在功率（标幺值和有名值），经对IEEE测试系统的计算验证正确性。
关键词：潮流计算；Matlab；IEEE
Abstract
The flow calculation is the most fundamental and most commonly used in the calculation of the power system. Under the given operating conditions of the system, network wiring and component parameters by flow calculation can determine the bus voltage (magnitude and phase angle), each branch of the power flow, the power loss of the entire system. The trend is calculated to achieve the necessary means of power generation and supply of power system security and economy and an important aspect of our work.
Therefore, the flow calculation in power system planning, have a wide range of applications in the production run, scheduling management and scientific computing.
Flow calculation in mathematics multivariate nonlinear equations, solving There are many ways, when the system is relatively simple, the number of nodes is relatively small, we can obtain the parameters by hand count, but when the system is a complex network by hand calculation of the parameters is clearly impossible, which set forth requirements for the emergence of computer algorithms.
The preparation of the power flow calculation program written in C or Matlab language, more complex grid containing ring network power flow calculation, the output node voltage (pu and famous value), branch current and apparent power (standard verify the correctness of the unitary values and the well-known value), the calculation of the IEEE test systems.
Keywords: flow calculation; Matlab; IEEE
目 录
摘 要 I
Abstract II
目 录 3
1 绪论 3
1．1潮流计算 3
1.1.1 潮流计算概述 3
1.1.2 潮流计算的意义 6
1.2 MATLAB 7
1.2.1 MATLAB概述 7
1.2.2 MATLAB的优缺点 8
1.3 总结 10
2 电力系统的潮流计算 11
2.1 概述 11
2.2 潮流计算的基本方程 11
2.2.1节点的分类 11
2.2.2基本方程式 12
2.2.3牛顿-拉夫逊 15
3 PQ分解法的潮流计算 18
3.1 PQ分解法的基本方程式 18
3.2计算步骤 20
3.3 PQ分解法程序框图 21
4 MATLAB编程及其实例仿真 23
4.1程序清单 23
4.2设计验证 31
5 总结与展望 36
参考文献 37
致 谢 38
