Abstract: Against the background of massive integration of distributed photovoltaics(PV), a special power quality test was carried out on typical stations of the oilfield power grid. This study quantitatively evaluated the harmonic content of typical load sites and different types of inverters, analyzed the harmonic injection sections of distributed PV power plants, and identified the main harmonic sources of the oilfield power grid. Based on the evaluation and test results, specific harmonic control measures and suggestions were proposed, providing effective references for the power quality management of the oilfield power grid.