Active harmonic filtering has become an essential part of power quality products generated in industrial and commercial locations. Active power filters are essential to reduce harmonics and maintain the efficiency of electrical systems. In particular, three-phase active harmonic filters can help alleviate power quality problems in hospitals. Hospitals require high-quality power systems to support medical equipment and maintain life-critical operations. Hospital electrical systems can experience a range of disturbances, including dips, swells, voltage transients, and electromagnetic interference. Harmonics generated by electronic equipment can disrupt a hospital’s power quality and cause equipment damage, leading to system failure and reduced patient care. Active harmonic filters are important components that help maintain power quality in hospitals. This technology continuously monitors for harmonic distortion and filters out those unwanted signals before they can damage the system. Active harmonic filters correct waveform distortion and provide high-quality power to hospital facilities by combining technologies such as capacitors, inductors, and active components. Active harmonic filters are designed to operate in a parallel configuration with the mains circuit while introducing additional current to the system. This current helps to generate harmonics that are equal in amplitude but opposite in phase to those present in the electrical system, thereby significantly reducing the harmonics. The active filtered current waveform is superimposed on the unfiltered current waveform to form a waveform with lower total harmonic distortion. A recent case study demonstrates how active harmonic filters have been successfully implemented in hospitals. A 300-bed hospital in China was experiencing power quality issues due to harmonic distortion generated by the extensive electronic equipment installed within the facility. These distortions greatly exceed acceptable levels, causing cables and transformers to overheat, shortening the life of the equipment and causing frequent maintenance and replacement. The hospital installed a 100A three-phase active harmonic filter to alleviate these problems. The device reduces total harmonic distortion (THD) from 16% to less than 5%. The active filter also increases the power factor from around 0.86 to close to 1, reducing power consumption in the system. Active harmonic filters increase the efficiency of electrical systems and increase system reliability by preventing equipment failure, saving hospitals significant maintenance time and money. In summary, active harmonic filters offer significant advantages in maintaining power quality in hospitals. More and more electronic equipment is used in hospitals, and the harmonics they generate can cause considerable power quality problems. Active harmonic filters are an important part of power quality products that filter out unwanted distortion and provide high quality power to hospital facilities. Active harmonic filters can reduce energy consumption, reduce maintenance effort, and ultimately help hospitals provide high-quality patient care.
Post time: Mar-24-2023