TITLE:
Design of Power Supply for On-line Monitoring System of Transmission Lines
AUTHORS:
Kai Chen, Zi-jian Zhao, Yu-ning Zhang, Yang-chun Cheng, Yuan Dai
KEYWORDS:
Monitoring System; Power Supply of High-voltage Transmission Line; Draw-out Power Coil; Single-chip Microcomputer
JOURNAL NAME:
Energy and Power Engineering,
Vol.5 No.4B,
October
30,
2013
ABSTRACT:
This paper uses CT to gain the energy directly from the
high-voltage transmission line, to address the problem of power supply for
monitoring system in high voltage side of transmission line. The draw-out power
coil can induce voltage from the transmission line, using single-chip
microcomputer to analog and output PMW wave to control the charging module,
provides a stable 3.4 V DC voltage to the load, and solve the problem of easy
saturating of core. The power supply based on this kind of draw-out power coil
has undergone the overall testing, and it is verified-showing that it can
properly work in a non-saturated status within the current range of 50 - 1000 A, and
provide a stable output. The equipment also design protection circuit to
improve the reliability to avid the impacts of the impulse current or
short-circuit current. It effectively solves the problem of power supply for
On-line Monitoring System of Transmission.