My take on this.
https://www.mge.com/about-mge/electricity/elec-glossary.htm

*Dispatch, Dispatching - The operating control of an integrated electric system to:
Assign generation to specific generating plants and other sources of supply to effect the most reliable and economical supply as the total of the significant area loads rises or falls.
Control operations and maintenance of high-voltage lines, substations and equipment, including administration of safety procedures.
Operate the interconnection.
Schedule energy transactions with other interconnected electric utilities.*

high voltage/tension lines

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Note added at 1 hr (2015-09-04 04:18:30 GMT)
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I would go with "running"

High-tension wires a threat in residential areas
The passing of high-tension lines on the roofs of residential and commercial complexes have increased the plight of residents, especially slums, ever since they had electricity in different colonies of Dehradun.
http://www.tribuneindia.com/news/uttarakhand/high-tension-wi...
high tension wire doctypes: judgments
the passing of high tension wire and construction of an overhead tank and T.V.room by the Government and the property has no access was ever brought to the knowledge of the appellant....
http://indiankanoon.org/docfragment/1141243/?formInput=high ...

But I would reword it:

"...who are demanding that power cables be strung and towers built on their land."

Our "W" Series (Regular Duty) is specifically designed for tension stringing, and assure that conductor will remain in the neutral position during stringing of transmission or distribution lines.
http://lewismfg.com/Grips_RegularDutySwivels.htm

A cable stringing roller device for temporarily supporting cable on an insulator carried by a cross member of a pole during installation of the cable onto an ..
http://www.google.com.ar/patents/US5599005

...granted special permission by rural groups such as the National Farmers' Union and Countryside Landowners' Association to string cable on...
http://www.theguardian.com/technology/2010/oct/07/bt-superfa...

Rogers thought it had a five-year deal with Aliant Inc. to string Rogers' cable lines across thousands of utility poles in the Maritimes for an annual fee of $9.60 per pole. But early last year, Rogers was informed that the contract was being cancelled and the rates were going up. Impossible, Rogers thought, since its contract was iron-clad until the spring of 2007 and could potentially be renewed for another five years.
http://www.theglobeandmail.com/report-on-business/comma-quir...