primary frequency

primary frequency

[′prī‚mer·ē ′frē·kwən·sē]
(communications)
Frequency assigned for normal use on a particular circuit or communications channel.

primary frequency

The radiotelephony frequency assigned to an aircraft as a first choice for air-ground communications in a radiotelephony network.
References in periodicals archive ?
While mostly used for primary frequency reserve to stabilize grid frequency in response to frequency deviations, the energy storage system could also be used for other ancillary services and is expected to have a payback of five to seven years.
Summary: New Delhi [India], Sept 27 (ANI): Siemens Limited has announced commissioned India's first condensate throttling-based primary frequency control solution at National Capital Power Station (NCPS), NTPC Dadri (Stage 2, Unit 6).
Primary frequency and voltage along with secondary capacity and voltage.
Using the characteristic matrix to establish the 5-order hydroturbine matrix model, the simulation result of primary frequency regulation is shown in Figure 4.
On January 1, 1960, it was replaced by NBS-2 as the national primary frequency standard, although it continued to be compared to NBS-2 as a secondary standard until 1962, when it had reached a reported accuracy of 1 x [10.sup.-11] [24].
It is also the first grid-scale energy storage system in the United States that will be used to provide primary frequency response, an essential reliability service.
The BPA encompasses the company's entire line of radio products and accessories operating in all the primary frequency bands.
The North American Electric Reliability Corp (NERC) task force had defined six requirements for generation that supports grid stability: voltage, volt-ampere reactive (VAR) control and/or power factor regulation; fault ride through; real power control, ramping, and curtailment; primary frequency regulation; frequency droop response; and short circuit duty control.
In this option, the commercial entity would use one frequency band but could switch to another one temporarily so the DoD could use the primary frequency.
In particular, the higher the percentage of DG is, the lower the reserve for the primary frequency regulation becomes.