Power transmission line monitoring system
OwnerTapani O. Seppainventor
Life of this patent
Estimating the term…
Abstract
A system for determining the sag of an overhead power transmission line to prevent flashover to adjacent objects on earth. A tension measuring device is provided to produce a sign as a function of powerline tension. The signal is processed and transmitted to a distant location by cellular communication to a distant central monitoring station. Knowing the sag-tension relationship of the monitored line the sag is determined. Thus action may be taken if the powerline sag becomes excessive.
Claims9
A system for measuring the sag of an overhead power transmission power line comprising:
- a power transmission line section having two terminal ends;
- two section terminal transmission towers;
- strain insulator means to secure each terminal end of the power line section to a respective section transmission tower;
- intermediate transmission towers spaced in a line between the terminal towers;
- suspension insulator means to secure intermediate points of the power transmission line section to respective intermediate transmission towers;
- said suspension insulator means to permit longitudinal movement of the power line;
- tension measuring means interposed between each strain insulator means and the respective terminal transmission tower to produce an electrical signal representative of the power line tension;
- signal processing means located at and connected to the tension measuring means;
- said signal processing means including programmed computer means to produce second electrical signals which are a function of the sag of the power line;
- and
- transceiver means connected to the computer means to transmit the second electrical signals to a distant location whereby current in the power line is adjusted in accordance with the received second electrical signals.
A method for monitoring the sag of an overhead power transmission line comprising the steps of:
- measuring the tension of the power line;
- producing an electrical signal representative of the tension measurement;
- processing said electrical signal in accordance with a predetermined tension-sag relationship to produce a second signal which is a function of sag of the power line;
- transmitting said second electrical signal to a distant location in a predetermined transmission mode;
- receiving the second signal at the distant location whereby current in the power line is adjusted in accordance with the received second signal.
Dependencies are inferred from the claim text.