The invention discloses a power distribution network line fault on-line monitoring and alarming
system. The
system includes a fault positioning
software system and a power distribution line
fault indicator. The fault positioning
software system and the power distribution line
fault indicator cooperate. The fault positioning
software system includes an intrastation
grounding line selection apparatus, a communication front-end processor, an injection
signal source and an aerial conductor line fault positioning main
station monitoring system. The
grounding line selection apparatus and the injection
signal source serve to perform
single phase grounding fault positioning. The power distribution line
fault indicator and a
data acquisition concentrator are outrastation apparatuses. The
data acquisition concentrator and the power distribution fault indicator form a
subnetwork. Among the subnetworks, a
monitoring system for a line via the intrastation communication front-end processor is constituted. The fault positioning
software system and the power distribution line fault indicator communicate by using
cascade via
radio frequency. According to the invention, with the cooperation between the fault position
software system on a fault line selection host computer and the power distribution fault indicator which has communication function on the line, information which indicates the position and time of the fault can be displayed within minutes of the occurrence of the fault on a
geographic information system map of a monitoring center, which facilitates maintenance personnel to head to the site of the fault, eliminate the fault and increase reliability of power supply.