Online monitoring method and device for alternating current capacitor

• Main Authors: WEI WEN, HUANG KAILUN, LIN ZHENHUANG, HONG PEIZAI
• Format: Patent
• Language: Chinese; English
• Published: 09.04.2019
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention is suitable for the field of the electrical technology, and provides an online monitoring method and device for an alternating current capacitor. The method comprises the following stepsthat: obtaining the inductor current value, the grid-connected current value, the grid-connected voltage value and the capacitor input voltage value of a current transformer; according to the inductor current value and the grid-connected current value, obtaining an alternating current capacitor current value; according to the grid-connected voltage value and the capacitor input voltage value, obtaining an alternating current capacitor voltage value; according to the alternating current capacitor current value and the alternating current capacitor voltage value, determining the practical capacity value of the alternating current capacitor; and according to the practical capacity value and the original capacity value of the alternating current capacitor, monitoring the alternating current capacitor, and obtaining t