Customer questions:

Customers are large-scale manufacturing enterprises, with a large number of impact loads on the power side. During the production process, the plant management personnel found that the transformer and bus bar in the distribution station often had abnormal noise and vibration, and the capacitors in the two reactive power compensation cabinets were bulging and damaged.

Test results:

(1) By checking the wiring mode of two reactive power compensation cabinets, it is found that the reactive power compensation capacitor is not equipped with reactor;

(2) The power quality of the incoming cabinet of the distribution station is detected, and the total harmonic distortion rate is increased due to the periodic impact load;

(3) Through the comparison before and after the reactive power compensation is put into operation, the harmonic current changes obviously, and the odd harmonics are amplified in varying degrees, especially the 11th and 13th harmonics.

Customer value

(1) Find the hidden trouble of power supply and distribution system which has been bothering customers for a long time;

(2) Provide data reference and solutions for customers to carry out power quality harmonic control in the later period,;

(3) Enhance the customer's concern about power quality, including the introduction of power quality prevention and governance scheme for future construction, technical transformation and expansion, so as to ensure the power safety of the plant and reduce the failure rate of equipment.