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Medium Voltage products Energy reliability & revenue improvementSpeaker: Jean-Yves Pocthier - Schneider Electric France
Technical solution for improvement of distributed energy reliability and revenue improvementAMEU 2006
2AMEU October 2006 - v0
Technical solution for improvement of distributed energy reliability and revenue improvementAMEU 2006
I. Introduction
II. Fault Detection
III. Remote control
IV. Conclusion
Medium Voltage products Energy reliability & revenue improvement
Guiding System
The new way to
make your electrical
installations in
Electrical Distribution
3AMEU October 2006 - v0
Technical solution for improvement of distributed energy reliability and revenue improvementAMEU 2006
Main causes• population growth
• related economical development
Limitations on electricity side• production means (power plants)
• aging T&D networks
• outages
• technical and non-technical losses
I. Introduction
An increasing demand for Energy
4AMEU October 2006 - v0
Technical solution for improvement of distributed energy reliability and revenue improvementAMEU 2006
Quality of service can be measured• 5 distribution quality indexes (SAIDI, SAIDIp, SAIFI,
SAIFIp, SAFIsh)
MV network accounts for 50% of the total faults• HV network (25%) and LV network (25%)
Use a global approach to improve the network• use simultaneously different technical solutions
• optimise the use of the existing power means
I. Introduction
How to improve MV distribution
5AMEU October 2006 - v0
Technical solution for improvement of distributed energy reliability and revenue improvementAMEU 2006
Today ’s focus
Reliability of distributed energy • Cables, lines and switchgears improvement
• Reduction of outage occurrences and duration
• Voltage level control
• Harmonic filtering
Revenues• Reduction of non-distributed energy (hence billing)
• Reduction of non-technical losses
• Optimisation of investment costs
I. Introduction
How to improve MV distribution
6AMEU October 2006 - v0
Technical solution for improvement of distributed energy reliability and revenue improvementAMEU 2006
On utilities side• Revenues (non-distributed energy).• Equipment damage.• Standby generators.• Customer satisfaction & regulator penalties.
On customers side• Plants damages – smelters, paper mill, etc.• Lost production time.
Political issues• Government pressure to improve power quality.
I. Introduction
Outage costs
7AMEU October 2006 - v0
Technical solution for improvement of distributed energy reliability and revenue improvementAMEU 2006
Nature• Transient faults (70%)
– conductors clashing in the wind, tree branches, animals on conductors, lightning strikes
• Permanent faults (30%)– careless vehicle drivers, operating errors (earth
lead connected while re-energizing), engine Types
• earth faults– detected by unbalance threshold
• phase to phase faults– detected by phase over current thresholds
I. Introduction
Types of faults
8AMEU October 2006 - v0
Technical solution for improvement of distributed energy reliability and revenue improvementAMEU 2006
Today ’s focus
This solution is well known and widely used in South Africa
I. Introduction
Comprehensive solution to reduce outages
The solution is a combination of different devices
Distribution lines• standalone Fault Passage Indicators• remote controlled FPIs• remote controlled switchgears (LBS, sectionalizers)• Reclosers
Underground cables• standalone FPIs• remote controlled FPIs• remote controlled switchgears (LBS, CB)
9AMEU October 2006 - v0
Technical solution for improvement of distributed energy reliability and revenue improvementAMEU 2006
NO
MV/LV substations in underground cable network
Pole mounted switches &
MV/LV transformers
I. Introduction
Comprehensive solutions to reduce outage
Control centre
NO
Standalone FPIs
++ low cost ++ high accuracy-- local indication-- local reconfiguration --------------------------------- no current & power measurement-- no remote maintenance
NO
Remote controlled FPIs
-+ medium cost -+ average accuracy++ immediate remote indication-- local reconfiguration -------------------------------++ current & power measurement++ remote maintenance
NO
Remote controlled switches
-- high cost -- low accuracy++ immediate remote indication++ immediate remote reconfiguration -------------------------------++ current & power measurement++ remote maintenance
10AMEU October 2006 - v0
Technical solution for improvement of distributed energy reliability and revenue improvementAMEU 2006
I. Introduction
II. Fault Detection
III. Remote control
IV. Conclusion
Medium Voltage products Energy reliability & revenue improvement
11AMEU October 2006 - v0
Technical solution for improvement of distributed energy reliability and revenue improvementAMEU 2006
It helps reducing outages (hence costs), thanks to:• its help to locate the faulty segment by
– the detection of both earth and phase-phase faults.– a powerful visual indication.
• Standalone FPIs may be chosen among the following types:
– for Distribution lines– Clip on phase conductors.– Pole mounted
– for Underground cable network:– Wall mounted– Embedded into RMUs
II. Fault Detection
Standalone FPIOVERHEAD LINES
• tamper-proof• all types of pole
UNDERGROUND CABLES
• easy to install• balanced poles (A-shape)
• easy to install• retrofit or new sites
• self-powered• current measurement
Examples of products
12AMEU October 2006 - v0
Technical solution for improvement of distributed energy reliability and revenue improvementAMEU 2006
In addition to the benefits of a standalone FPI, it provides the following :
• Immediate alarm report to the SCADA• Transient fault detection & counting• MV measurement recording (current & power)
There are two types• FPIs fitted with a dry contact output relay, connected to a digital
input of a standard RTU fitted with modem functions– poor reliability - no MV measurement
• FPIs embedding a RTU function able to record and report alarms & measurement of the MV line on which it is connected
– reliability and MV measurement– => helps to track non-technical losses
II. Fault Detection
Remote controlled FPIProtocoles
Function
• IEC 870-5-101• DNP3• MODBUS
• Earth fault & overcurrent detection• Recording of time-stamped events• Recording of load measurement• Alarms reporting
Transmission
• RS232• GSM-GPRS• PSTN• 902-928 Mhz radio
13AMEU October 2006 - v0
Technical solution for improvement of distributed energy reliability and revenue improvementAMEU 2006
I. Introduction
II. Fault Detection
III. Remote control
IV. Conclusion
Medium Voltage products Energy reliability & revenue improvement
14AMEU October 2006 - v0
Technical solution for improvement of distributed energy reliability and revenue improvementAMEU 2006
Ready to connectsimple and reliable
Ideal remote control cabinet
Local devices: protection relays, PM, …
Control center:DNP3, IEC, Modbus
III. Remote control
Local devices: protection relays, PM, …
Control center:DNP3, IEC, Modbus
substation to retrofit or new design
Fault detection & measurement
Simple & reliable local operation
Monitoring & control
Guaranteed switch operation
Remote maintenance
Open communications
Concentrator function
15AMEU October 2006 - v0
Technical solution for improvement of distributed energy reliability and revenue improvementAMEU 2006
Control• Control of all switchgears• FPI function. • Current or power measurement.• Logic control
Communication• to SCADA (IEC, DNP3,..)• to IEDs (protection relays, PM) • using radio, PSTN, GSM/ GPRS,…• recording event & measurement.
– => helps to track non-technical losses• downloading of SS configuration and software updates.
Power supply • reliable main and back-up supplies, • switch operation during outages.
III. Remote control
Ideal remote control cabinetT200 I Underground Substations
T200 P Overhead switches
• up to 16 switches• FPI function on all feeders• Data exchange with IEDs• Auto-changeover function
• up to 2 switches• IP55 enclosure• Sectionaliser function
Examples of products
16AMEU October 2006 - v0
Technical solution for improvement of distributed energy reliability and revenue improvementAMEU 2006
I. Introduction
II. Fault Detection
III. Remote control/Sectionalizing
IV. Conclusion
Medium Voltage products Energy reliability & revenue improvement
17AMEU October 2006 - v0
Technical solution for improvement of distributed energy reliability and revenue improvementAMEU 2006
Standalone FPIs, remote controlled FPIs and remote controlled switches are 3 complementary ways to improve a MV network.
Each step will improve network availability and control, hence its reliability and revenues, and some may help to reduce non-technical losses
Improving the availability helps to lower operation costs and meets regulatory obligations.
IV. Conclusion
3 main messages 3 main
messages
18AMEU October 2006 - v0
Technical solution for improvement of distributed energy reliability and revenue improvementAMEU 2006
for your attentionTT hanks
19AMEU October 2006 - v0
Technical solution for improvement of distributed energy reliability and revenue improvementAMEU 2006
uestions & answersQQ