From: 	"Rocha, Paul X." <paul.rocha@centerpointenergy.com>
To:	<ROS@lists.ercot.com>
CC:	"Donnell, Cheri H." <cheri.donnell@centerpointenergy.com>, "Caufield, De...
Date: 	12/5/2007 1:19 PM
Subject: 	December 6, 2007 ROS Meeting - NOGRR002 Recommendation
Attachments:	002NOGRR_PSS-URL-TF_Recommendation.doc

As I noted in an earlier email, the PSS / URL Task Force was assigned to
develop proposed language for NOGRR002, which was previously remanded to
ROS by TAC, addressing requirements for Power System Stabilizers.  The
PSS / URL TF met November 30 in Houston and reached general agreement in
concept on requirements for Power System Stabilizers embodied in
NOGRR002.  I was assigned to attempt to commit the general agreement in
concept to proposed NOGRR002 language.  Originally, the thought was that
I would take a first shot at proposed language and review the proposed
language with a small group of stakeholders to refine the language in an
attempt to present consensus language for ROS to vote upon.
Unfortunately, I was not able to complete my assignment until now, and I
will be tied up in meetings the rest of the day.

So, I am forwarding to the entire ROS group a first shot at language for
NOGRR002 attempting to capture the concepts from the November 30 PSS /
URL TF meeting, drafted by members of my staff and me in redline form
using the NOGRR002 version previously approved by ROS as a starting
point.  NOGR002 is listed as a voting item under agenda item 4 for
tomorrow's ROS meeting.  I apologize for sending this draft language
only a day before the ROS meeting, but it took a couple of days after
the November 30 meeting to complete this assignment.  My intent is to
talk through the proposed language and then talk through next steps
tomorrow.  I envision some refinement of this draft language may be
necessary.

A complicating factor in this exercise is that some language in NOGRR002
addressing AVR status may overlap and conflict with language proposed in
NPRR081, which has been remanded to ROS by TAC.  Given that NPRR081 has
been remanded to ROS, the final wording of the affected protocol has not
yet been determined.  This subject of NPRR081 is outside the original
scope of the PSS / URL TF and was not discussed at the November 30 TF
meeting.  However, in proposing NOGRR002 language, you will see that I
drafted AVR requirement language intended to deal with this issue by
referencing the applicable protocol section.  However, the issue is
further complicated by the fact that, if my proposed language is
adopted, status notification language for AVRs (subject of NPRR081)
would vary from proposed NOGRR002 language addressing status
notification for PSSs (outside the scope of NPRR081), which may or may
not be acceptable.

If all this is clear as mud, or if I've managed to confuse myself in
attempting to muddle through these issues (a distinct possibility),
hopefully the ambiguities will be clarified through dialogue at
tomorrow's ROS meeting and we can collectively determine next steps.

 

Paul Rocha

PSS / URL TF Chair