Project Dynamic Line Rating

lettucestewΗλεκτρονική - Συσκευές

21 Νοε 2013 (πριν από 3 χρόνια και 8 μήνες)

116 εμφανίσεις

Oncor Electric Delivery Company LLC

Smart Grid Demonstration
Project


Dynamic Line Rating
(DLR)

June 25, 2010

Justin Johnson

ERCOT

Reliability Operations
Subcommittee Meeting

Oncor Electric Delivery Company LLC

Tension Based Dynamic Rating
Technology

2

Oncor Electric Delivery Company LLC

Justin Johnson ERCOT ROS Presentation 06/25/2010

Dynamic Line Rating

Transmission Line Ratings are governed by:


Current flowing in the conductor


Conductor size and resistance


Ambient weather conditions:


Temperature


Wind speed and direction


Solar radiation

3

Oncor Electric Delivery Company LLC

Justin Johnson ERCOT ROS Presentation 06/25/2010

Ambient Temperature:


2
o
C fluctuation




-

㈥ 捡c慣楴a,


10
o
C drop in ambient



⬠+ㄥ 捡c慣楴a

Solar Radiation:


Cloud shadowing




-

愠晥f 灥牣p湴n


Total eclipse



⬠ㄸ1 捡c慣楴a

Wind increase 1 m/sec:


45
°

angle




縠~㠥 捡c慣楴a


90
°

angle




縠~㌥捡p慣楴y


How Weather Conditions Affect Ratings

(Illustrative Only)

4

Oncor Electric Delivery Company LLC

Justin Johnson ERCOT ROS Presentation 06/25/2010

What to Monitor?

Dead
-
end

Dead
-
end

Suspension

Suspension

Suspension

Tension increases in spans cooled by wind,

and decreases in spans not cooled by wind…..

5

Oncor Electric Delivery Company LLC

Justin Johnson ERCOT ROS Presentation 06/25/2010

Tension Monitoring
-

Dynamic Line Rating

Tension Equalizes

Suspension insulator strings swing to equalize horizontal conductor tension

Monitoring the conductor’s tension solves the problem of varying winds and
exposure along the transmission line.

A conductor’s tension is directly related to the average temperature of all the
spans in the line section.

That temperature is directly correlated to the conductor sag and clearances.

Dead
-
end

Dead
-
end

Suspension

Suspension

Suspension

6

Oncor Electric Delivery Company LLC

Justin Johnson ERCOT ROS Presentation 06/25/2010


Know true line capacity in real time


Improve system reliability


Optimize grid utilization

Dynamic Line Rating Concepts
(Illustrative Only)

Dynamic Line Rating

7

Oncor Electric Delivery Company LLC

Justin Johnson ERCOT ROS Presentation 06/25/2010

Line was operating within limits in accordance with operating standards

Without DLR, this event must be reported as a violation

The operator would have been forced to move the grid off its optimum dispatch

Dynamic
Rating

Actual
Load

Static
Rating

Impact On Transmission Grid Operations

Example Of Safely Managed Contingency

8

Oncor Electric Delivery Company LLC

Justin Johnson ERCOT ROS Presentation 06/25/2010

LOCATION OF INSTRUMENTED CIRCUITS

Study Area in Critical Congestion Zone


45 Loadcell Tension Monitoring Units


8 Master Locations Feeding into
SCADA

9

Oncor Electric Delivery Company LLC

Justin Johnson ERCOT ROS Presentation 06/25/2010

DLR Smart Grid Demonstration

Project Goal
: Increase available capacity on a known
congested and constrained transmission path and remove
existing commercial constraints to implementing DLR
technology


Existing Commercial Constraints Include:



Clear Demonstration that DLR Technology is Reliable



Utility Planners Understand the Cost Structure and Benefits



Interoperability with Utility Transmission Management Systems


10

Oncor Electric Delivery Company LLC

Justin Johnson ERCOT ROS Presentation 06/25/2010

PROJECT OBJECTIVES


Operational Objectives


Relieve congestion and transmission
constraints


Gain operational knowledge of DLRs for
wide scale deployment


Ensure that safety code clearances are not
impacted


Demonstrate that multiple monitoring units
can be integrated into operations


Identify/quantify other operational limits that
may impact ability to raise ratings



11

Oncor Electric Delivery Company LLC

Justin Johnson ERCOT ROS Presentation 06/25/2010

PROJECT OBJECTIVES

Demonstration Objectives


Extrapolate the impact of DLRs
on the study’s transfer path to
entire ERCOT region


Determine a methodology to
release day
-
ahead ratings


Develop user friendly tools for
the operator to manage
improved WASA

12

Oncor Electric Delivery Company LLC

Justin Johnson ERCOT ROS Presentation 06/25/2010

PROJECT OBJECTIVES

Economic Objectives


Quantify economic value of
released transmission capacity to
market


Estimate the savings associated
with deferral of rebuilding,
reconductoring, or building new
circuits


Quantify the total costs of
implementing this type of DLR

13

Oncor Electric Delivery Company LLC

Justin Johnson ERCOT ROS Presentation 06/25/2010

Integrated Dynamic Line Rating Systems


Tension
-
based
Dynamic Line Rating
System for overhead
transmission lines


Tension resolves all
environmental factors
for accurate results


Best way to capture
spatial variability of
wind, sun, air
temperature


Captures as built, as
aged condition of line


Communicates with
utility’s Energy
Management System


14

Oncor Electric Delivery Company LLC

Justin Johnson ERCOT ROS Presentation 06/25/2010

Solid stainless steel construction.

Sized to match maximum tension

Real Time Rating
-


Loadcell Monitors Tension

15

Oncor Electric Delivery Company LLC

Justin Johnson ERCOT ROS Presentation 06/25/2010

Real Time Rating


Communications Package

Reads conductor tension, net
radiation temperature,
ambient temperature

Communicates with substation
via spread spectrum radio

Solar powered

16

Oncor Electric Delivery Company LLC

Justin Johnson ERCOT ROS Presentation 06/25/2010

Integrated Dynamic Line Rating Systems

SCADA/EMS Master

Existing SCADA protocol

over substation RTU channel

(RS232/485)

License free

Spread Spectrum Radio

IntelliCAT
TM

for Windows

ICCP or MODBUS protocol



CAT
-
1


and line load data from EMS



Substation

Control Center

Transmission Line

Operator’s Console



CAT
-
1
TM

Remote Monitors

CATMaster
TM

Base Station


Line capacity and temperature to EMS


17

Oncor Electric Delivery Company LLC

Justin Johnson ERCOT ROS Presentation 06/25/2010

MAJOR PARTICIPANTS



Oncor


Purchase DLR equipment and manage project



The Valley Group, a Nexans company


Provide DLR equipment



Siemens Energy, Inc.


Integrate DLR technology into Oncor’s TMS system



Chapman Construction Company


Install equipment on designated circuits



Southwest Research Institute


Perform independent analysis

18

Oncor Electric Delivery Company LLC

Justin Johnson ERCOT ROS Presentation 06/25/2010

Initial Device
Installation

PROJECT TIMELINE

2010

Qtr 1

2011

2012

2013

Qtr 2

Qtr 3

Qtr 4

Qtr 1

Qtr 2

Qtr 3

Qtr 4

Qtr 1

Qtr 2

Qtr 3

Qtr 4

Qtr 1

Qtr 2

Qtr 3

Qtr 4

Design/Initial
Procurement

Fine
-
tune Initial
Device Output

Terminal
Upgrades

Remaining Device
Installation

Final Report
Submitted to DOE

Project Studies

Reporting
(Quarterly to DOE)

19

Oncor Electric Delivery Company LLC

Justin Johnson ERCOT ROS Presentation 06/25/2010


Summary



Target Completion is 2
nd

Quarter 2013



Provides two years of summer peak data



Will provide a “roadmap” for other utilities to follow
-

study will be
public



Success Factors include increasing transmission capacity and
removing existing commercial constraints to DLR technology



All eight circuits should be instrumented by end of this year