【正文】 Abstract II Abstract Power system load flow calculation is the most basic and monly used calculations. Given according to the system operating conditions, the work connection and device parameters can be determined by power flow calculation of the bus voltage (magnitude and phase angle), the power flowing through the ponents, overall system power consumption and so on. Flow calculation is to achieve economic development of power system supply the necessary means and important part of the work. Therefore flow calculation in power system planning and design, production and operation, scheduling management, and scientific research have a wide range of applications. The main purpose of this design is for the general electricity work, the formation of the node admittance matrix, determine the appropriate method, the preparation of generalpurpose puter program to get results. Introduces the design and the PQ deposition Newton Raphson two algorithms, PQ deposition although the structure is more streamlined than the Newton method, but for the general work of modern puter storage space and puting speed has been very strong, in view of the Newton Familiar with its intuitive algorithm, this design in programming using Newton Raphson polar form. The process of solving equations using matlab powerful puting capabilities, the preparation of M language, a reasonable set variables, to achieve generalpurpose puting functions. Keywords: power system, power flow calculation, Newton Raphson method, Matlab. 河南城建學(xué)院本科畢業(yè)設(shè)計（論文） 目錄 III 目錄 摘 要 .............................................................................................................................. I Abstract .............................................................................................................................. II 目錄 .................................................................................................................................. III 1 引言 ................................................................................................................................. 1 潮流計算目的 ......................................................................................................... 1 潮流計算意義 ......................................................................................................... 1 潮流計算發(fā)展史 ..................................................................................................... 1 基于 MATLAB 的電力系統(tǒng)潮流計算發(fā)展前景 ......................................................... 2 2簡單電力系統(tǒng)潮流計算 ...................................................................................................... 4 ........................................................................................ 4 ................................................................... 4 輻射型網(wǎng)絡(luò)的手工潮流計算方法 .................................................................. 6 簡單環(huán)網(wǎng)的潮流計算 ............................................................................................... 7 兩端電壓相等 ................................................................................................ 7 兩端電壓不相等 ............................................................................................. 8 3 復(fù)雜電力系統(tǒng)潮流計算的計 算機(jī)算法 .............................................................................. 10 ...................................................................................... 10 ...................................................................................... 11 ........................................................................................................... 14 PQ節(jié)點 ................................................................................................... 14 PV節(jié)點 ................................................................................................... 14 平衡節(jié)點 ............................................................................................... 14 ............................................................................................. 15 牛頓 拉夫遜法（直角坐標(biāo)） .................................................................................. 15 拉夫遜法的推導(dǎo)過程 ......................................................................... 15 （直角坐標(biāo)） .......................................................... 17 : .................................................................................... 19 拉夫遜法計算步驟 ............................................................................. 19 PQ分解法潮流計算 ............................................................................................. 20 PQ分解法潮流計算概述 ........................................................................... 20 PQ分解法的潮流計算步驟 ........................................................................ 20 PQ分解法的特點 ...................................................................................... 21 4 Matlab概述 ................................................................................................................... 22 ........................................................................................................... 22 Matlab中的變量 .................................................................................................. 22 Matlab編程 ......................................................................................................... 23 ................................................................................................ 23 ................................................................................................ 24 河南城建學(xué)院本科畢業(yè)設(shè)計（論文） 目錄