technical solution for improvement of distributed energy reliability and revenue improvement

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


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



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



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



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



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



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



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)



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



I. Introduction

II. Fault Detection

III. Remote control

IV. Conclusion




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



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



I. Introduction

II. Fault Detection

III. Remote control

IV. Conclusion




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



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



I. Introduction

II. Fault Detection

III. Remote control/Sectionalizing

IV. Conclusion




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



for your attentionTT hanks



uestions & answersQQ

technical solution for improvement of distributed energy reliability and revenue improvement

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