CAJ | 학술논문

针对油田生产中潜油电机无功功率的变化和消耗对电网质量、设备性能产生的不利影响，基于瞬时无功功率理论，研究了一种新型改进的无功电流提取算法，将其应用于潜油电机无功补偿系统中。该方法能够在工频下提取基波的正序和负序无功电流，省去了锁相环，完全不受电压畸变和频率的影响。补偿策略采用正序、负序无功电流同步补偿的控制方法。Matlab 仿真结果验证了无功补偿系统不仅能满足潜油电机无功动态补偿的要求，还可以有效抑制系统电流的不平衡。
침대유전생산중잠유전궤무공공솔적변화화소모대전망질량、설비성능산생적불리영향，기우순시무공공솔이론，연구료일충신형개진적무공전류제취산법，장기응용우잠유전궤무공보상계통중。해방법능구재공빈하제취기파적정서화부서무공전류，성거료쇄상배，완전불수전압기변화빈솔적영향。보상책략채용정서、부서무공전류동보보상적공제방법。Matlab 방진결과험증료무공보상계통불부능만족잠유전궤무공동태보상적요구，환가이유효억제계통전류적불평형。
In oilfield production,the reactive power’s change and consumption of submersible motors brings some adverse impact to the power quality and device performance.Based on instantaneous reactive power theo-ry,a newly-improved reactive current extraction algorithm was proposed and applied to the submersible motor’ s wattles power compensation system to extract positive and negative sequence reactive current under funda-mental frequency without PLL and completely-unaffected by voltage distortion and frequency effects.The com-pensation strategy adopts control method for the positive sequence and negative sequence reactive current syn-chronous compensation.Simulation with Matlab shows that this compensation system can meet requirements of the dynamic reactive power compensation and can restrain the system current imbalance.