Petua Pampasan Kuasa Reaktif

Apabila beban grid kuasa adalah induktif, seperti motor elektrik, mesin kimpalan, dll., arus grid kuasa ketinggalan di belakang voltan dengan sudut. Apabila beban adalah kapasitif, seperti keadaan overcompensation, arus grid kuasa membawa voltan mengikut sudut. Plumbum atau ketinggalan faktor kuasa merujuk kepada hubungan fasa antara arus dan voltan. Pengawal peranti pampasan mengesan kuantiti fizikal sistem bekalan kuasa untuk menentukan pensuisan kapasitor, yang boleh menjadi faktor kuasa atau arus reaktif atau kuasa reaktif.
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, dalam julat ini, pengawal tidak menghantar sebarang isyarat kawalan dan bank kapasitor yang telah digunakan tidak akan keluar, begitu juga bank kapasitor yang belum digunakan. Apabila cos Φ tidak memenuhi keperluan, seperti cos Φ ketinggalan dan<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.