complete temporary tasks assigned by the Manager. Second, characteristic functions 1, according to the company, \bility of three\nts of the management system, responsible for \of three\on of major rules and regulations, and is responsible for training, implementation, inspection and guide its operation; 2, the company responsible for the Department (workshop) annual and monthly economic responsibility economic responsibility system and various special formulation, revision, inspection, evaluation, internal evaluation, summary, approved and communicated, audits, surveys, feedback from senior Department assessment; 3, responsible for the company's long-term plan, annual plan of work; 4, is responsible for the company's monthly operating conditions analysis and monthly focus assessment focus; 5 rules and regulations, the company responsible for the development, examination, inspection and training, Discovery Manager. 10 quality accidents of work, the company responsible for the Department of investigation, judge, processing, analysis, summary and reporting; 11, and is responsible for implement implementation implementation national of financial system, and financial discipline, according to company \ system requirements, developed company financial management and financial supervision system (including funds costs approval system, and borrowing approval system, and settlement system cash management system,), by Manager approved Hou seriously organizaton implmentation, and implementation, and 1 设计原始题目
1.1 具体题目
如图1所示负序网络，线路(b)、(c)断开，求各监视点(I)、(II)的负序电流分配系数。
124.5I28.43265584104.219(c)6212.118(d)21613.6A7(a)3.21034.1662321204.52230B17401513.68(b)3.2126.3134.51413.997II3281110.6 图1 负序网络图实例
1.2 要完成的内容
在多数场合下，电力系统向牵引供电系统供电的网络十分复杂。为了求得监视点的负序电流分配系数，需要将系统化简。化简至包括各监视点和负序电流源的最简单网络，使网络中不属于监视点的电源点和负荷点尽量少。
2 设计课题的计算与分析
2.1 计算的意义
由于单相工频交流电气化铁道牵引负荷的特点，当三相电力系统向它供电时，它将在电力系统中引起负序电流。同时，交—直整流型电力机车产生的高次谐波电流进入电力系统。而且，牵引负荷的功率因数较低。这些都对电力系统的运行产生不良影响。计算电力牵引负荷对电力系统发电机的负序影响，通常需要计算对该发电机的负序电流分配，并检验是否超出发电机负序电流允许值。
complete temporary tasks assigned by the Manager. Second, characteristic functions 1, according to the company, \bility of three\nts of the management system, responsible for \of three\on of major rules and regulations, and is responsible for training, implementation, inspection and guide its operation; 2, the company responsible for the Department (workshop) annual and monthly economic responsibility economic responsibility system and various special formulation, revision, inspection, evaluation, internal evaluation, summary, approved and communicated, audits, surveys, feedback from senior Department assessment; 3, responsible for the company's long-term plan, annual plan of work; 4, is responsible for the company's monthly operating conditions analysis and monthly focus assessment focus; 5 rules and regulations, the company responsible for the development, examination, inspection and training, Discovery Manager. 10 quality accidents of work, the company responsible for the Department of investigation, judge, processing, analysis, summary and reporting; 11, and is responsible for implement implementation implementation national of financial system, and financial discipline, according to company \developed company financial management and financial supervision system (including funds costs approval system, and borrowing approval system, and settlement system cash management system,), by Manager approved Hou seriously organization implmentation, and implementation, and 2.2 详细计算
(1) 由图2得图3，则
1I24.528.473.2583265664104.2971034.11816328212.1204.522302(d)3.6BA1117121310.6401513.66.34.5II1413.9图2 线路(b),(c)断开后网络图
对元件3、4、5进行Δ-Y变换得：
XX3×X527=X=5.6(Ω) 3+X4+X5XX3×X428=X=73.1(Ω) 3+X4+X5XX4×X529=X=2.2(Ω) 3+X4+X5X30=X20+X22=35(Ω)
对元件6、10、28、29进行Δ-Y变换得：
XX28×(X29+X6)34=XX=5.2(Ω) 28+29+X10+X6XX28×X35=10X=21.6(Ω) 28+X29+X10+X6XX10×(X29+X6)36=XX=2.4(Ω)
28+29+X10+X6X37=X12+X15=19(Ω) X38=X11+X32+X21=38(Ω)
X39=X27+X34=10.8(Ω) X40=X9+X36=9.4(Ω)
XX23×X2741=X=13.1(Ω) 23+X272321 complete temporary tasks assigned by the Manager. Second, characteristic functions 1, according to the company, \nts of the management system, responsible for \ity of three\he formulation of major rules and regulations, and is responsible for training, implementation, inspection and guide its operation; 2, the company responsible for the Department (workshop) annual and monthly economic responsibility economc responsibility system and various special formulation, revision, inspection, evaluation, internal evaluation, summary, approved and communicated, audits, surveys, feedback from senior Department assessment; 3, responsible for the company's long-term plan, annual plan of work; 4, is responsible for the company's monthly operating conditions analysis and monthly focus assessment focus; 5 rules and regulations, the company responsible for the development, examination, inspection and training, Discovery Manager. 10 quality accidents of work, the company responsible for the Department of investigation, judge, processing, analysis, summary and reporting; 11, and is responsible for implement implementation implementation national of financial system, and financial discipline, according to company \developed company financial management and financial supervision system (including funds costs approval system, and borrowing approval system, and settlement system cash management system,), by Manager approved Hou seriously organization implmentation, and implementation, and电力牵引供电系统课程设计报告
A1I2528743910.8409.43521.6B182164371913538384113.11740II1414
图3 第一步网络简化图
(2) 求A对I、II的分配系数CIA、CIIA，则网络由图3经图4化简为图5 对元件35、38、40、41进行Δ-Y变换得：
X35×X40=2.5(Ω)
+++X35X41X38X40X35×(X38+X41)=13.4(Ω)
X43=X35+X41+X38+X40X40×(X38+X41)=5.9(Ω) =X44X35+X41+X38+X40X45=X16+X17=44(Ω) X46=X39+X42=13.3(Ω) X42=X47=X44+X13=10.9(Ω)
对元件43、46、47进行Y-Δ变换得：
X48=X43+X46=29.1(Ω) X47X43+X47=29.1(Ω)
X49=X43+X47+X46X46+X47=26.1(Ω)
X50=X46+X47+X43X43+X46+3