The Application Research of Fuzzy Control with Self-tuning of Scaling Factor in the Energy Saving Control System of Pumping Unit

How to save energy in the production process of oil field is an important issue. The beam pumping unit in the oil field has the serious nonlinear and strong load disturbance. It is difficult to establish an accurate mathematical model. The classical control theory cannot solve the problem of energy saving and efficiency of the pumping unit. In order to improve the automation level, an energy saving control system is composed of remote main control system and local energy saving control system is designed. Oil engineers can obtain operating conditions of the pumping unit through remote monitoring software. And in the case of inadequate supply of oil, local energy saving control of the pumping unit will be enabled. In this paper, a fuzzy control strategy is proposed based on the study of the fuzzy automatic control system. Aiming at the problem of variable control effect when the disturbance changes too much, an adaptive fuzzy control strategy is proposed to improve the control performance of the whole system, which is utilized to adjust the scale factor. The self-tuning scaling factor fuzzy control system is discussed in detail, and then the software and hardware of the energy saving control system are designed respectively. For the extraordinary industrial environment of oil field, it takes some effort to resist the interference of the software and hardware. According to the principle of modular design, the monitoring interface and the software of the local energy saving control system are implemented. In the field test, by comparing the experimental data before and after the use of proposed energy-saving control system, it is found that pump efficiency is improved, and the system is more efficient. The results showed that the energy saving control system achieved the energy efficiency goal.