Reactive Power Compensation Tips

Thaum lub load ntawm daim phiaj hluav taws xob yog inductive, xws li hluav taws xob motors, vuam tshuab, thiab lwm yam, tam sim no ntawm daim phiaj hluav taws xob lags tom qab voltage los ntawm lub kaum sab xis. Thaum lub load yog capacitive, xws li overcompensation xeev, tam sim no ntawm lub hwj chim daim phiaj ua rau lub voltage los ntawm lub kaum sab xis. Power factor lead lossis lag yog hais txog theem kev sib raug zoo ntawm tam sim no thiab voltage. Tus maub los ntawm cov cuab yeej them nyiaj kuaj xyuas lub cev kom muaj nuj nqis ntawm cov khoom siv hluav taws xob los txiav txim siab hloov ntawm cov capacitors, uas tuaj yeem yog lub zog hluav taws xob lossis hluav taws xob tam sim no lossis lub zog reactive.
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, nyob rau hauv qhov chaw no, tus maub los tsis xa tawm cov teeb liab tswj, thiab cov tuam txhab nyiaj capacitor uas tau muab tso rau hauv kev ua haujlwm tsis tawm, thiab cov tuam txhab nyiaj capacitor uas tsis tau muab tso rau hauv kev ua haujlwm. Thaum cos Φ tsis ua raws li qhov yuav tsum tau ua, xws li cos Φ lagging thiab<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.