Variable-voltage Energy Saving Strategy for Three-phase Induction Motor in Oil Pumpjacks
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摘要: 针对油田抽油机负载变化频繁, 其对应的配套感应电动机经常处于轻载状态, 效率低,电能浪费大的特点, 分析了电机的效率与负载大小的关系, 探讨了调压节能的可行性, 推导了最佳调压系数与负载及电机参数间的数值关系, 提出了调压节能策略. 该方法为抽油用三相感应电动机提高效率, 降低用电成本提供了理论依据. 实验结果证明该方法是正确有效的.Abstract: As the loads of oil pump in oil field are changing frequently, a three-phase induction motor that drives the loads often operates under light-load conditions. As a result, the efficiency of the system is low and electric energy is wasted greatly. This paper discusses the possibility of adjusting voltage for the purpose of energy saving, deduces the optimalvariable-voltage coefficient and gives a variable-voltage energy saving strategy for the induction motor. The strategy lays a theoretical foundation for efficiency improvement and cost reducing of induction motor in operation. The correctness of the method has been proved by experimental results.
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Key words:
- Energy saving /
- induction motor /
- oil field /
- variable-voltage
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