Compared to conventional pumping units with low efficiencies and general hydraulic pumping units using hydraulic accumulators to recover and reuse energy, this article presents a novel multi-source hydraulic pumping unit with the symmetrical structure in order to save energy. First, the balanced mechanical structure through the symmetrical arrangement of double wells can not only decrease the total power of the system significantly but also make the power consumption of the pumping unit drop substantially in the constant speed phase. Uniquely, the proposed pumping unit is jointly driven by a hydrostatic transmission hydraulic system and a small-scale solar–wind hybrid power generation system. The hydrostatic transmission technique enables the system power output to adapt to the load requirements in real time without extra throttling and overflow losses, while the solar–wind hybrid system drives alone in the constant speed phase to save energy and bring environmental benefits. After parameter analyses and calculations, the energy-saving advantage of the proposed system is displayed when compared to a counterpart. Then, the mathematical model of the system is developed, and the rule-based energy management strategy is designed for the energy distribution of the proposed system. The simulation results verify that the feasibility and reasonableness of the proposed system.

与低效率的常规抽油机和使用液压蓄能器回收和再利用能量的普通液压抽油机相比，本文提出了一种新型的对称结构的多源液压抽油机，以节省能源。首先，通过双井对称布置的平衡机械结构不仅可以显着降低系统的总功率，而且可以使抽油机的功率消耗在恒速阶段显着下降。独特的是，拟议的抽油机由静液压传动液压系统和小型日风混合动力发电系统共同驱动。静液压传动技术使系统的功率输出能够实时适应负载需求，而不会产生额外的节流和溢流损失，而太阳能-风电混合动力系统则在恒速阶段单独驱动以节省能源并带来环境效益。经过参数分析和计算后，与对等系统相比，该系统具有节能优势。然后，开发了系统的数学模型，并设计了基于规则的能量管理策略来实现所提议系统的能量分配。仿真结果验证了所提系统的可行性和合理性。经过参数分析和计算后，与对等系统相比，该系统具有节能优势。然后，开发了系统的数学模型，并设计了基于规则的能量管理策略来实现所提议系统的能量分配。仿真结果验证了所提系统的可行性和合理性。经过参数分析和计算后，与对等系统相比，该系统具有节能优势。然后，开发了系统的数学模型，并设计了基于规则的能量管理策略来实现所提议系统的能量分配。仿真结果验证了所提系统的可行性和合理性。