电梯反馈能量对电能质量的影响

Influence on the Quality of Electric Energy Recovered by the Elevator Energy-feedback Unit

采用基于快速傅里叶变换的谐波检测方法，对目前国内在用的12台典型曳引电梯及能量反馈装置产品，分别在有能量回馈电网和无能量回馈电网2种情况下进行电压谐波和电流谐波的检测。依据检测结果，比较并分析了电梯反馈能量的谐波特点以及能量反馈装置的应用对于电能质量的影响。研究结果表明，电梯反馈能量会造成电网谐波污染，影响电能质量，因此，新型无污染的电梯节能新技术有待进一步研发。

Based on the investigations of the harm and the test methods of harmonic wave, the method of FFT is chosen to test the harmonic wave of voltage and current. Twelve typical elevators with different energy - feedback units are tested in the energy -feedback grid and the non -energy -feedback grid. Based on the test results, the harmonic characteristics of the feedback energy and the effect on the quality of the electric energy when the elevator energy - feedback unit are discussed. According to the results, the feedback energy of the elevator will cause harmonic pollution to the grid and influence the power quality.