The Application Of Active Filters in The Hospital's Power Distribution System
May 09, 2025| As a hospital that provides uninterrupted power supply 24 hours a day, it has a huge demand for electricity. The safety of the hospital's power supply is not only crucial for the safety of medical staff, but also of great significance for the life and health of patients.
Medical equipment includes various devices with nonlinear impedance characteristics, such as precise computer components and highly sensitive microelectronic devices. These will cause severe harmonic pollution to the power grid. The data accuracy of electrocardiogram machines, defibrillators, electrosurgical devices, etc. is slightly affected, seriously endangering the life safety of patients.
Harmonics can also interfere with electromagnetic induction, electrostatic induction and conductive interference networks, affecting information systems. Due to the characteristics of medical services, the hospital information network system must operate stably and continuously without interruption for 7×24 hours. Harmonic pollution often causes errors in codes and programs of medical computers, leading to errors such as operation, data, time, crashes, and unexpected restarts, ultimately causing the entire system to fail. Network paralysis affects the normal operation of the hospital. Therefore, the control of harmonics is particularly important for the medical power system.
The harmonic pollution of the power distribution network was effectively controlled by using active filters. Harmonics were effectively filtered out, ensuring the safety of electricity supply for the hospital. The total installed capacity of the active filters was 680A. The collected data results show that after the active filters were put into operation, the power quality of the power distribution system of this hospital has significantly improved. The active filters operated normally and the effect was good, achieving the expected treatment effect. The harmonics on the power grid side were well purified. This not only enabled the hospital to further improve energy conservation and consumption reduction, but also ensured the normal and stable operation of medical equipment. It provided a powerful power distribution guarantee for the hospital to better treat patients and serve the people.