南一变电所动态补偿滤波方案.doc

动态补偿滤波方案根据测试结果分析，现有滤波支路使用年限较长，电容容值衰减严重，滤波补偿效果较差，已满足不了目前的工况需求，也达不到国家的考核标准，因此需要重新考虑采购变电所的滤波补偿设备。经了解现在淮北矿业集团公司许疃矿、孙疃矿、杨柳矿、刘店矿、祁南矿共五个矿井采用了磁控式动态补偿滤波设备，现投运效果良好，功率因数每月都在0.95以上，运行稳定，免维护，比较适合煤炭系统工况的使用。磁控式动态补偿滤波装置内部无机械动作元件，不会对系统造成冲击。 装置为无级调节，能实现无功的连续补偿,不会出现过补、欠补现象。装置中滤波与无功动态调节相对独立，既能有效滤除谐波，又能取得良好的补偿效果。 动态补偿的响应时间较快，尤其是针对煤炭系统中提升机的反应速度，此设备能够及时跟踪负载的变化，补偿效果良好。所以根据本矿现有负荷工况的需要，考虑到运行方式，今后主副井提升机要在两段母线上切换，设计了磁控式动态补偿滤波装置的初步方案。 补偿容量计算：主井侧：从测试的结果来看，正常运行时功率为P1KW左右，最大负荷可以达到P2KW左右。从现场了解，目前生产有点不正常，负荷略偏低，所以取有功PKW计算。功率因数在正常生产时为0.63。目标功率因数为0.96，经查表补偿功率因数为0.941kVar/KW, 所以总基波补偿容量为PKW*0.941kVar/KW=Q总 kVar。由于考虑到谐波情况，所以要设置3、5、7、11次兼高通支路滤除谐波，使系统中的谐波情况满足考核要求。副井侧：从测试的结果来看，正常运行时功率为4700KW，功率因数取0.74，目标功率因数为0.95，经查表补偿功率因数为0.58kVar/KW，所以总的基波补偿容量为4700 KW*0.58kVar/KW=2726 kVar.系统正常运行时，6KV侧两段分列运行，但不排除并列运行的可能，所以为了确保并列运行时功率因数和谐波标准能够满足考核要求，两段设计方案一致，都按照主井提升要求设计。本一、 滤波器设计：根据谐波测试结果，设置5次、7次、11次兼高通三个滤波支路，电容器安装总容量为4800kvar，电容器电压取7.5/3KV，具体参数计算如下：5次支路：电容器额定电压为7.5/3KV，基波补偿容量800Kvar，安装容量为1200KVar，单台额定容量为400KVar。 XC=U2/Q=46.875 XC=1/C，C=1/XC=67.94F L=1/n2C=5.97mH单台电容器容值为67.94F，每相1并1串，总容值为67.94F，滤波电抗器的电感为5.97mH，额定电流为92.37A。7次支路：电容器额定电压为7.5/3KV，基波补偿容量588Kvar，安装容量为900KVar，单台额定容量为300KVar。 XC=U2/Q=62.5 XC=1/C，C=1/XC=50.95F L=1/n2C=4.06mH单台电容器容值为50.95F，每相1并1串，总容值为50.95F，滤波电抗器的电感为4.06mH，额定电流为69.28A。11次兼高通支路：电容器额定电压为7.5/3KV，基波补偿容量1742Kvar，安装容量为2700KVar，单台额定容量为300KVar。 XC=U2/Q=62.5 XC=1/C，C=1/XC=50.95F L=1/n2C=1.65mH单台电容器容值为50.95F，每相3并1串，总容值为152.85F，滤波电抗器的电感为1.65mH，额定电流207.8A。另：由于煤矿中提升机的存在，负荷的变化呈周期性的特点，所以需要一台磁控电抗器快速响应并调节整个系统无功的输出，故配磁控电抗器容量为2400KVar，可以实现系统无功的连续可调,保证功率因数稳定在0.95以上。附表：功率因数与补偿容量查询表补偿前功率因数值cosf1补偿后功率因数目标值及每KW负荷所需电容器容量(KVar)0.700. 800. 820. 840. 860. 880.900. 920. 940. 960. 981.00.500.710.9821. 0341. 0861. 1391. 1921. 2481. 3061. 3691. 4401. 5291. 3720.510.520.530.540.550.670.620.580.540.500.9370.8930.8500.8090.7690.9890.9450.9020.8610.8211. 0410.9970.9540.9130.8731.0941.0501.0070.9660.9261.1471.1031.0601.0190.9791. 2031.1871.1161.0751.0351.2611.2171.1741.1331.0931.3241.2801.2371.161.1561.3951.3511.3081.2671.2271.4841.4401.3971.3561.3161.6871.6431.6001.5591.5190.560.570.580.590.600.460.420.390.350.310.7300.6920.6550.6190.5830.7820.7440.7070.6710.6350.8360.7690.7590.7230.6870.8870.840.8120.7760.7400.9400.9020.8650.820.7930.9960.9580.9210.8850.8491.0541.0160.9790.9430.9071.1171.0791.0421.0060.9701.1881.15001.1131.0771.0411.2771.2391.2021.1161.1301.4801.4421.4051.361.3330.610.620.630.640.650.280.250.210.180.150.5490.5160.4830.4510.4190.6010.5680.5350.5030.4710.6530.6200.5870.5550.5230.7060.6730.6400.6080.5760.7590.7260.6930.6610.6290.8150.7820.7490.7170.6850.8730.8400.8070.7750.7430.9360.9030.8700.8380.8061.0070.9740.9410.9090.8771.0961.0631.0300.9980.9661.2991.2661.23312011.1690.660.670.680.690.700.120.090.060.030.000.3880.3580.3280.2990.2700.4400.4100.3800.3510.3220.4920.4620.4320.4030.3740.5450.5150.4850.4560.4270.5980.5680.5360.5090.4800.6540.6240.5940.5650.5360.7120.6820.6520.6230.5940.7750.7450.7150.6860.6570.8460.8160.7860.7570.7280.9350.9050.8750.8460.8171.1381.1081.0731.0491.0200.710.720.730.740.750.2420.2140.1860.1590.1320.2940.2660.2380.2110.1840.3460.3180.2900.2630.2360.3990.3710.3430.3160.2890.4520.4240.360.3690.3420.5080.4800.4520.4250.3980.5660.5380.5100.4830.4560.6290.6010.5730.5460.5190.7000.6720.6440.6170.5900.7890.7610.7330.7060.6790.9920.9640.9360.9090.8820.760.770.780.790.800.1050.0790.0520.0260.0000.1570.1310.1040.0780.0520.2090.1830.1560.1300.1040.2620.2360.2090.1830.1570.3510.2890.2620.2360.2100.3710.3450.3180.2920.2660.4290.4030.3760.3500.3240.4920.4660.4390.4130.3870.5630.5370.5100.4840.4580.3520.3260.5990.5730.5470.8550.8290.8020.7760.7500.810.820.830.840.850.0260.0000.0780.0520.0260.0000.1310.1050.0790.0530.0270.1840.1580.1320.1060.0800.2400.2140.1880.1620.1360.2980.2720.2460.2200.1940.3610.3350.3090.2830.2570.4320.4060.3800.3540.3280.5210.4950.4690.4430.4170.7240.6980.6720.6460.6200.860.870.880.890.900.0000.0530.0270.0000.1090.0830.0560.0280.0000.1670.1410.1140.0860.0580.2300.2040.1770.1490.1210.3010.2750.2480.2200.1920.3900.3640.3370.3090.2810.539