Tipy na kompenzáciu jalového výkonu

Keď je zaťaženie elektrickej siete indukčné, ako sú elektromotory, zváračky atď., prúd elektrickej siete zaostáva za napätím o uhol. Keď je záťaž kapacitná, ako je stav nadmernej kompenzácie, prúd elektrickej siete vedie napätie pod uhlom. Vedenie alebo oneskorenie účinníka sa vzťahuje na fázový vzťah medzi prúdom a napätím. Regulátor kompenzačného zariadenia zisťuje fyzickú veličinu napájacieho systému, aby určil spínanie kondenzátorov, ktorými môže byť účinník alebo jalový prúd alebo jalový výkon.
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, v tomto rozsahu riadiaca jednotka nevysiela žiadny riadiaci signál a skupiny kondenzátorov, ktoré boli uvedené do prevádzky, nevychádzajú ani skupiny kondenzátorov, ktoré neboli uvedené do prevádzky. Keď cos Φ nespĺňa požiadavky, ako napríklad cos Φ oneskorenie a<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.