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1.概述 目前中原油田油区配电系统采用的是35kV直配供电方式,配电变压器(35/0.4kV)和低压配电装置设在计量站,再由计量站经低压电缆辐射配电至抽油机电动机。为提高油区低压配电系统的功率因数,减少系统的功率损耗,一般在计量站变压器的低压侧都安装了自动无功补偿装置,且补偿容量按功率因数进行调节,并利用交流接触器进行分级投切电容。而油区的用电负荷主要是抽油机。根据实际测试及理论分析,抽油机负荷是一种依抽油机的冲程为周期连续变化的周期性负荷,也就是说在
1. Overview At present, the distribution system of Zhongyuan Oilfield uses a 35kV direct-coupled power supply system. Distribution transformers (35 / 0.4kV) and low-voltage power distribution units are installed at the metering station. The metering station is then powered by low voltage cables to Pumping motor. In order to increase the power factor of the low-voltage power distribution system in the oil zone and reduce the power loss of the system, an automatic reactive power compensation device is usually installed on the low voltage side of the transformer of the metering station, and the compensation capacity is adjusted according to the power factor, and the AC contactor Grading switching capacitor. The electricity load in the oil zone is mainly the pumping unit. According to the actual test and theoretical analysis, the pumping unit load is a cyclic load that varies continuously according to the stroke of the pumping unit, that is, at