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辽宁工程技术大学电力系统分析综合训练三设计题目电力系统三相短路计算指导教师刘健辰院(系、部)电气与控制工程学院专业班级电网13-1学号1305080116姓名苏小平日期2016/05/31智能电网系综合训练标准评分模板综合设计成绩评定表学期2015/2016第2学期姓名专业班级课程名称电力系统分析设计题目电力系统三相短路计算成绩评分项目合格评定不合格评定设计表现1.独立工作能力独立完成设计不能独立完成设计2.上交设计时间按时迟交设计说明书3.设计内容设计思路清晰,结构方案良好,设计参数选择正确,条理清楚,内容完整,结果正确设计思路不清晰,结构方案不合理,关键设计参数选择有错误,调理清楚,内容不完整,有明显错误4.设计书写、字体、排版规范、整洁、有条理,排版很好不规范、不整洁、无条理,排版有问题很大5.封面、目录、参考文献完整不完整图纸6.绘图效果满足要求很差7.布局合理布局混乱8.绘图工程标准符合标准不符合标准答辩9.回答问题回答基本正确或正确回答不正确总评定评定说明:(1)不合格标准1)设计说明书不合格否决制,即3、4两项达不到要求,不予合格;2)9项评分标准中,有6项达不到要求,不予合格。(2)合格标准除设计说明书的3、4、5项必须满足要求外,其余6项,至少有4项满足要求,给予合格。(3)请在评定栏里打“√”评定,若全部满足要求,不必分项评定,只需在总评定中打“√”即可,最后给出最终成绩,并签字。最终成绩:评定教师签字:电网13-1班数据序号姓名1L2L3L11501156216012573170135841801156519012576140135871551156816512579175135810185115611195125712145135813150115614苏小平1601257151701358161801156171901257181401358191551156201651256211751357221851158231951256241451357251501158目录一、单线图...................................................................................................................................................1二、节点三相短路情况...............................................................................................................................1三、线路中间(50%)三相短路情况........................................................................................................3四、手工计算母线C发生三相短路..........................................................................................................4五、计算结果对比分析...............................................................................................................................51一、单线图:二、节点三相短路情况:A母线发生三相短路时表一B母线发生三相短路时表二C母线发生三相短路时表三节点名称相电压A相电压B相电压C相角A相角B相角C电流(A)相位(度)a0.00.00.00.00.00.040517.8-89.68节点名称相电压A相电压B相电压C相角A相角B相角C电流(A)相位(度)a0.38580.38580.3858-1.27-121.27118.731050.46-88.66b000000节点名称相电压A相电压B相电压C相角A相角B相角C电流(A)相位(度)a0.594070.594070.59407-5.22-125.22114.78759.569-81.33b0.352910.352910.35291-13.49-133.49106.51c0000002D母线发生三相短路时表四E母线发生三相短路时表五F母线发生三相短路时表六节点名称相电压A相电压B相电压C相角A相角B相角C电流(A)相位(度)a0.597130.597130.59713-5.86-125.86114.141376.37-80.30b0.35950.35950.3595-15.16-135.16104.84c0.01870.01870.0187-79.24160.7640.76d000000节点名称相电压A相电压B相电压C相角A相角B相角C电流(A)相位(度)a0.820140.820140.82014-4.74-124.74115.26712.053-68.13b0.729140.729140.72914-8.84-128.84111.16c0.575760.575760.57576-11.84-131.84108.16d0.570760.570760.57076-11.13-131.13108.87e000000节点名称相电压A相电压B相电压C相角A相角B相角C电流(A)相位(度)a0.86690.86690.8669-2.29-122.29117.715049.09-74.02b0.805340.805340.80534-4.12-124.12115.88c0.70090.70090.7009-4.29-124.29115.71d0.698640.698640.69864-3.83-123.83116.17e0.321190.321190.3211912.69-107.31132.69f0000003G母线发生三相短路时表七三、线路中间(50%)三相短路情况:(1)线路bc之间三相短路:表八(2)线路de之间三相短路:表九节点名称相电压A相电压B相电压C相角A相角B相角C电流(A)相位(度)a1.132960.802591.147657.56-119.22109.63997.962-38.34b1.128530.8231.170286.45-120.03109.3c1.127590.822961.170246.47-120.05109.28d1.115250.780491.116218.36-118.99109.85e1.022070.858731.182964.78-122.11110.77f0.977120.858771.183022.21-122.11110.77g01.076571.323220-136.58124.27节点名称相电压A相电压B相电压C相角A相角B相角C电流(A)相位(度)a0.110161.915211.94255165.58-154.25152.65218.50988.59b0.059871.937061.96593156.48-154.66152.99c0.023881.948111.98393156.28-155.08153.06d0.023881.948111.98393156.28-155.08153.06e0.023881.948111.98393156.28-155.08153.06f0.023881.948111.98393156.28-155.08153.06g0.021871.766731.76856180180180节点名称相电压A相电压B相电压C相角A相角B相角C电流(A)相位(度)a0.774510.774510.77451-5.76-125.76114.24908.047-71.61b0.625970.625970.62597-11.34-131.34108.66c0.402150.402150.40215-15.79-135.79104.21d0.395250.395250.39525-14.36-134.36105.64e0.005350.005350.00535-32.94-152.9487.06f0.005350.005350.00535-32.94-152.9487.06g0.004490.004760.00027018004(3)线路fg之间三相短路:表十四、手工计算母线C发生三相短路''E*GX*1TX*1LX选取091。E系统电抗标么值.087108.01201000.130.13*NBGSSX变压器电抗标么值08753.015010010013.13100%*1NBSTSSUX线路电抗标么值12552.0230100160415.0220*BBLUSLXX节点名称相电压A相电压B相电压C相角A相角B相角C电流(A)相位(度)a1.598750.909030.76631-2.64-85.6180.871701.91-143.03b1.598750.884530.74595-2.64-86.5379.37c1.598750.845810.71045-2.64-87.0678d1.598750.84460.70884-2.64-86.9478.11e1.598750.70820.57882-2.64-87.1274.42f1.598750.61770.51476-2.64-92.2765.25g1.597040.095550.095550005求得:3.6320.30015.091****LTGXXXEI短路点的起始次暂态电流251.023031003BBBUSIKAIIIBf0.9110.2513.632*短路点的冲击电流按故障点位置,发电机的冲击系数取为1.8KAKIIiimGBim2.328.1251.03.6322)(21*五、计算结果对比分析电力系统采用近似计算方法,在以下两种假设上进行:(1)在元件模型方面,忽略发电机、变压器和输电线路的电阻,不计输电线路的电容,略去变压器的励磁电流,负荷忽略不计或者只作近似估计。(2)在标么参数计算方面,选取各级平均额定电压为基准电压时,忽略各元件的额定电压和相应电压级平均额定电压的差别,认为变压器变比等于其对应侧平均额定电压之比,即所有变压器的标么变比均为1.手工计算所得的短路点起始次暂态电流为911A.然而运用软件仿真计算的短路电流为759A。相比较而言,手工计算所得短路电流值略大于软件模拟仿真值。
本文标题:电力系统三相短路计算
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