Power transmission line monitoring system
First Claim
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1. 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.
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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.
67 Citations
9 Claims
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1. A system for measuring the sag of an overhead power transmission power line comprising:
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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. - View Dependent Claims (2)
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3. A method for monitoring the sag of an overhead power transmission line comprising the steps of:
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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. - View Dependent Claims (4, 5, 6, 7, 8, 9)
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Specification