Impact of harmonies on electricity consumption
in the medical industry
The medical industry is mainly based on hospitals. With the development of the medical industry, users are equipped with many electronic medical equipment. The common feature of these devices is that the operation of the equipment will generate a large number of harmonics, which will cause the voltage and current waveforms to distort, affecting the power supply quality of the system, and also causing harm to other power supply and power-consuming equipment: shortening the service life of the equipment, interfering with the normal operation of important medical equipment, and affecting the safety of patients and medical staff. Xixing Technology provides professional harmonic control products that can efficiently solve the power quality problems in the medical industry and create a green, healthy, safe and stable power environment.
Where do harmonics in the medical industry come from?
The main loads of the hospital power distribution system are electronic medical precision equipment, lighting equipment, variable frequency equipment, computers and UPS. The harmonic sources of the above equipment are mainly switching power supplies, electronic ballasts, inverters, and rectifier-type electronic devices. Switching power supplies are mainly found in electronic medical equipment and computer equipment, and the harmonics they generate are mainly 3rd, 5th, and 7th harmonics; electronic ballasts are widely found in lighting equipment, such as fluorescent lamps, counter downlights, etc., and the harmonics they generate are mainly 3rd and other zero-sequence harmonics; inverters and rectifier-type power electronic devices are found in ventilation equipment and UPS, and the harmonics they generate are mainly 5th, 7th, and 11th harmonics. The harmonic distortion rate in the medical industry generally reaches about 15%~25.
Pain points of harmonics in the medical industry
The voltage fluctuations caused by harmonics will affect precision medical equipment, causing them to be interfered by harmonic signals and affecting the performance of the equipment. Hospitals are places with high requirements for power quality, and the impact of unexpected power outages and grid interference on medical equipment cannot be ignored. Many instruments cannot guarantee normal detection in a harmonic environment and may even affect their service life. The third harmonic will be superimposed on the neutral line, making the current on the neutral line more than twice that of the phase line, causing the cable to heat up and even fire hazards. Therefore, special equipment must be used to control harmonics.
Medical industry solutions
Xixing Technology's EasyPQ-APF series active filters can control 2-50 harmonics, and the harmonic filtering rate of low-order harmonics (harmonics within 13th order) can reach more than 95%. The harmonics generated by the medical industry are mainly 3rd, 5th, 7th, 11th, and 13th. At the same time, there are many single-phase loads in the hospital, which is prone to uneven distribution of three-phase loads, resulting in unbalanced three-phase current. For the problems of harmonics and three-phase current imbalance, the EasyPQ-APF series active filters can be used to effectively control harmonics and adjust the three-phase current imbalance, comprehensively improve the system power quality, and ensure the safety of electricity usage.
