Over the last several years NERC
has been guiding the development of the Interchange Distribution
Calculator (IDC) to support a number of initiatives to enhance
operating reliability under transmission open access. In addition
to other functions, NERC IDC provides various distribution factors
reflecting the impact of transactions (TDF factors) and generation
redispatch factors (GSF) on the flowgates (visit www.nerc.com,
for more details).
As a courtesy to PSS™MUST
users, we are providing a Monitored Element Definition file for
use with PSS™MUST and NERC's publicly available load flow
cases. This monitored element definition file was created from
NERC's October 26, 1999 "Book of Flowgates" list.
In general, the PSS™MUST flowgate
file should be used for the NERC load flow cases only, but because
the provided flowgate file is using bus names to define monitored
elements and contingencies, you will be able to use it for other
MMWG (VEM/MEN or FERC 715) type load flow cases with minor modifications.
PSS™MUST NERC flowgate file
can be used for various applications including:
Computing NERC TDF and GSF factors for your load flow case.
Transfer assessment studies with NERC flowgates used as the
proxies for transmission limits for external control areas.
Flowgates allow you to represent your neighbors limits without
detailed contingency analysis for these systems.
Using NERC flowgates in addition to your traditional monitored
elements (branches and interfaces) allows verifying that NERC
flowgates do capture the most important limits for your
system.
Using NERC flowgates is a computationally efficient practical
approach for the transfer limit assessment of the whole US
Eastern interconnection in one combined study.
