Voltage acquisition compensation circuit

• Main Authors: ZHONG ZIHUA, GONG XUEYI, LI XUGUANG
• Format: Patent
• Language: Chinese; English
• Published: 06.03.2020
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention discloses a voltage acquisition compensation circuit. The circuit comprises at least one compensation unit. Each compensation unit comprises a capacitor Ca1, a capacitor Cb1, a capacitorCc1 and a capacitor C01. A first end of the capacitor Ca1, a first end of the capacitor Cb1 and a first end of the capacitor Cc1 are separately used for inputting a three-phase low-voltage signal ofa voltage sensor. A second end of the capacitor Ca1, a second end of the capacitor Cb1 and a second end of the capacitor Cc1 are connected in parallel and then are connected to the first end of the capacitor C01. A second end of the capacitor C01 is grounded. The three-phase low-voltage signal of the voltage sensor is an alternating current signal. A capacitive reactance may generate when an alternating current signal passes through the capacitor Ca1, the capacitor Cb1, the capacitor Cc1 and the capacitor C01, and a voltage difference may form at both ends of a capacitor, wherein a voltage difference at both ends of th