Savjeti za kompenzaciju reaktivne snage

Kada je opterećenje električne mreže induktivno, kao što su elektromotori, aparati za zavarivanje itd., struja električne mreže zaostaje za naponom za ugao. Kada je opterećenje kapacitivno, kao što je stanje prekomerne kompenzacije, struja električne mreže vodi napon za ugao. Faktor snage vod ili kašnjenje se odnosi na fazni odnos između struje i napona. Kontroler kompenzacionog uređaja detektuje fizičku veličinu sistema za napajanje kako bi odredio komutaciju kondenzatora, što može biti faktor snage ili reaktivna struja ili reaktivna snaga.
Below is an example of power factor type. When this physical quantity meets the requirements, such as cos Φ leading and>0.98, lagging and>0.95, unutar ovog opsega, kontroler ne šalje nikakav kontrolni signal, a kondenzatorske banke koje su puštene u rad ne izlaze, kao ni kondenzatorske baterije koje nisu puštene u rad. Kada cos Φ ne ispunjava zahtjeve, kao što je cos Φ zaostajanje i<0.95, a set of capacitors will be put into operation, and if cos Φ still does not meet the requirements, the controller will delay for a period of time (the delay time can be set), and then another set of capacitors will be put into operation until all capacitors are put into operation. When a leading signal such as cos Φ<0.98 is detected, indicating a capacitive load, the controller will cut off the capacitor banks one by one. The principle to follow is that the first capacitor bank to be put into operation must be cut off before being cut off. If the delay time is set to 300s and this compensation device has ten capacitor banks, then the total input time is 5 minutes, and the same goes for cutting off. During this period, reactive power loss compensation can only be gradually implemented. If the delay time is set very short or not set, this situation may occur. When the controller detects cos Φ<0.95, it quickly turns on the capacitor banks one by one. During the input period, the power grid may already be a capacitive load, which is overcompensated. The controller then controls the capacitor banks to be cut off one by one, repeating the cycle and causing oscillation, leading to system collapse. Whether oscillation can be formed is closely related to the nature of the load, so this parameter needs to be adjusted according to the on-site situation, and the compensation effect should be considered while ensuring system safety.