The hospital is an important electric field. Let's learn about the reactive power compensation and harmonic treatment scheme of the hospital distribution system together with cook Cooper. At present, the reactive power compensation devices of the old low-voltage distribution system in some hospitals can't work normally. It is suggested to add advanced low-voltage capacitor banks and efficient monitoring devices to realize dynamic reactive power automatic compensation of distribution system and improve the power factor of hospital distribution system. In addition, harmonics are suppressed within the allowable range.

The hospital power distribution system is usually powered by several 10 / 0.4 kV main transformers through low-voltage distribution equipment. It is mainly used for electronic medical precision equipment, lighting, central air conditioning and ventilation equipment, computers and elevators. Most of them are single-phase nonlinear loads, and the harmonics of low-voltage distribution network are serious.

Reactive power compensation and harmonic control of hospital distribution system 2

Firstly, in terms of reactive power compensation, the dynamic reactive power compensation device is composed of imported capacitor, reactor, thyristor switch and reactive power controller. The invention adopts a series reactor and a capacitor to form a tuning capacitor bank for reactive power compensation, has good filtering effect, compensates the capacitive reactive power during filtering, is suitable for the low-voltage distribution system with less harmonic content in the hospital, and is economical and cost-effective

Different shunt capacitor devices can be used to study reactive power, centralized economic compensation or decentralized local compensation. The main effects are to reduce the power loss of equipment and lines, improve the power supply quality, improve the bearing management capacity of enterprise power transformer, and improve the transmission stability and transmission development capacity of management system engineering in long-distance transmission.

In the aspect of harmonic control, active power filter is used for filtering. As a new harmonic control technology, active power filter is an effective means to eliminate harmonic pollution and improve power quality. Compared with the traditional passive filter, active power filter has the technical advantages of compensating harmonics, suppressing flicker, compensating reactive power and automatically tracking compensation changes. It has been widely used in industry.