抽油机负功与电机功率测试仪表的合理选择

The Choice of the Gegative Power of the Pumping Unit and the Electric Motor Power Testing Instrument

分析了抽油机电机负功率的成因，通过实例说明了有负功率时不同的测量仪器对抽油机电机输入功率测量精度的影响，并提出了一些对策，对油田电能平衡测试工作具有一定的指导意义。

This article analyzes the cause of the negative for the electric motor of the pumping unit. With the help of the case study, the author points out that different testing instruments may influence the accu racy of the input power for the electric motor of the pumping unit when the negative power exists The author also gives some suggestions for the power balance testing in the oil field.