电力系统运行与控制课后作业.docx

电力系统运行与控制课后作业1．选用一种计算软件，计算IEEE30母线标准试验系统的潮流。并在此基础上，计算观察：（1）负荷功率的变化对负荷节点电压水平的影响；（2）变压器变比的调节对两端电压水平的影响；（3）PV节点母线电压水平控制调节对无功电源设备输出功率的影响。解：图1.1IEEE30节点系统接线图通过matpower 4.1工具包进行计算。在控制命令界面下输入命令runpf(case_ieee30)，回车得到的潮流计算结果如下：MATPOWER Version 4.1, 14-Dec-2011 -- AC Power Flow (Newton)Newtons method power flow converged in 2 iterations.Converged in 0.04 seconds=============================================================SystemSummary=============================================================How many? How much? P (MW) Q (MVAr)------------------------- ------------------------- ------------- -----------------Buses 30 Total Gen Capacity 900.2 -102.0 to 188.0Generators 6 On-line Capacity 900.2 -102.0 to 188.0Committed Gens 6 Generation (actual) 301.0 133.9Loads 21 Load 283.4 126.2Fixed 21 Fixed 283.4 126.2Dispatchable 0 Dispatchable -0.0 of -0.0 -0.0Shunts 2 Shunt (inj) -0.0 25.3Branches 41 Losses (I^2 * Z) 17.56 67.69Transformers 4 Branch Charging (inj) - 34.7Inter-ties 0 Total Inter-tie Flow 0.0 0.0Areas 1 Minimum Maximum ------------------------- ----------------------------Voltage Magnitude 0.992 p.u. @ bus 30 1.082 p.u. @ bus 11 Voltage Angle -17.64 deg @ bus 30 0.00 deg @ bus 1 P Losses (I^2*R) - 5.21 MW @ line 1-2Q Losses (I^2*X) - 15.61 MVAr @ line 1-2=============================================================Bus Data============================================================= Bus Voltage Generation Load # Mag(pu) Ang(deg) P (MW) Q (MVAr) P (MW) Q (MVAr)----- --------------------- ---------- ----------- ---------- -----