schneider ppt - autorecloser _ sectionalizer (1)

5/21/2018 Schneider PPT - Autorecloser _ Sectionalizer (1)

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ISGF Technology Session

Improving System Reliability throughAutomating Rural Feeders and

Substations

Amit Sharma

27thApril 2012


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Automatic Circuit Reclosers and Sectionalizers

Amit Sharma24thNov 2011


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Schneider Electric 3- EnergyMONTHLY REVIEW

Overhead Faults 60% - 70% of faults are of a transient (temporary) nature:

Conductors clashing in the wind

Tree branches falling on overhead conductors

Animals or birds getting curious

Careless motor vehicle drivers

Lightning strikes

Operating error : leaving earths connected etc

Some are more permanent:

An auto-reclosecycle should clear the fault

lock out of the section


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What is a Recloser ?

A Recloseris a protection device:

For overhead power lines

It is a circuit breaker with more arduoustest & install conditions

Designed to RECLOSE on to a fault.

Terminology

The auto-reclosecycle

Will detect a fault and open for a pre-programmed time,

before closing again automatically

This cycle can be repeated 3 times

Lockout typically on the fourth trip


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What is a Sectionaliser ?

A Sectionaliseris a switch: It is used in conjunction with an upstream recloser or circuit breaker

It counts the interruption created by a recloser during a fault sequence.

On a preset count

trips during the dead time of the up stream recloser

Isolates a faulty network section


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Benefit to the Customer

Improved reliability of power supply Quality of supplyAutomatic recloser function - supply restoration after temporary faults

Reduced outage time

Minimise revenue loss

Event Log and Remote control

Reduce cost of fault finding Better knowledge of the network

Reduction in the number of customer complaints


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MV NETWORK

MANAGEMENT


8/53Schneider Electric 8- EnergyMONTHLY REVIEW

- why improve MV distribution?

To obtain the best possible power

quality

The main issue is to reduce

outage time and cost to the utility

and its customers



- how can outage time be reduced?

By improving

MV networks: By improving the MV

networks management:

Large number of short

sectionsRedundant networks

Reliable components

With Fault Passage

Indicators (FPIs)

Or with remote

controlled load break

switches

Or with fully automated

reclosers andsectionalizers



R

- different types of devices

R2



- overhead networks: types of faults Temporary

faults

Permanent

faults

80% 20%



- temporary faults

Temporary faults can be cleared by the

use of Automatic Circuit Reclosers(ACRs)



R

- temporary fault: one recloser



R

15

s

C

O

Time

100%




R

15

s

C

O

15

s

Time

100%



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R

15

s

C

O

15

s

Time

100%



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R

15

s

C

O

15

s

15

s

Time

100%



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R

15

s

C

O

15

s

15

s

Time2

mn

100%



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R1

- temporary fault: TWOreclosers

R2


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R1Network A-

50%

Network B-

50%

NetworkB

Time

- temporary fault: TWOreclosers

R2


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- permanent faults

Permanent faults cannot be cleared by

automatic reclosing

To manage permanent faults, the

best solution is to add some

sectionalizers


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R

5H6H

100%

- case 1: no network automationPermanent fault


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R

5H6H

100% 95%

- case 1: no network automationPermanent fault

2 f f


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R

- case 2: addition of non-communicatingfault

passage indicators (FPI)

An FPI for each branch of the network

Add an FPI around

each majorobstacle


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- case 3: addition ofcommunicating FPIs

R

Put several

communicating

FPIs in strategic

locations

case 4: addition of communicating FPIs and remote


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- case 4: addition ofcommunicating FPIs and remote

controlled load break switches

RT

TT

T

T remote controlled load breakswitchesCommunicating FPI

5 l d ti li l d b k


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- case 5: recloser and sectionalizer load break

switches

R

case 5: recloser and


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- case 5: recloser andsectionalizer load break switches

S1 = opens after ONE reclosing

operation

S2 = opens after TWO reclosing

operations S3 = opens after THREE reclosing

operations

S4 = opens after FOUR reclosingo erations

Sectionaliser load break switches are

always associated with a recloseror circuit

breaker:



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S4

S3

S3

S2

S1

S2

- case 5: recloser andsectionalizer load break switches

R

Permanent fault



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S4

S3

S3

S2

S1

2 2

2

S2

- case 5: recloser and

sectionalizer load break switches

R

Permanent fault



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S4

S3

S3

S2

S1

2 2

2 S2

- case 5: recloser and

sectionalizer load break switches

R

Permanent fault

2

case : rec oser an


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S4

S3

S3 S2

S2

S1

- case : rec oser ansectionalizer load break switches

R

Permanent fault

2 60

75

%

95

%

f h d k


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- summary of overhead networks 1/2Permanent fault

95%

Case 2A recloser

+ FPIs3 h

6 h

95%

Case 1

A recloser

95%Case 3

A recloser

+ FPI with Com1h30

f h d k


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- summary of overhead networks 2/2

Permanent fault

95%

1h2

75 %Case 5

A recloser

and sectionalizers

95%

1

h

10

70 %Case 4: A recloser,

remote controlled

switches

and FPI with Com


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SAIDI (System Average Interruption Duration Index) can vary from a

few minutes to several hours,

SAIFI (System Average Interruption Frequency Index) can vary from

1to10and more, depending on :

population density (ruralor urbanarea)

proportion between undergroundand overheaddistribution

maximum accepted costsfor non distributed energy

Excellent Average PoorUrban area < 10 mn 30 mn >2 hrs

Rural area < 30 mn 2 hrs >10 hrs

Permanent Interruptions (>1 mn)

SAIDI/SAIFI variationsQuality Power

33/11 KV U d R t


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33/11 KV Unmanned Remote

Controlled S/s

C t U d R t t ll d 33/11 KV S/ ith


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Compact, Unmanned, Remote controlled 33/11 KV S/s with

2 transformers each up to 10 MVA.

Half space than a conventional s/s. Economic as very less civil work.

Saving in execution time and costly land in urban areas app.

Remote regular maintenance.

CB,Current & Voltage sensors are life sealed ,insensitive to the environment.

All types of protection OC,EF,UV,OV,OF,UF,DF, measurementKW,KWH,KVArH, data logging and event recording & self diagnostic facility

helps to analyze the system and energy consumption.

Delivers quality power.

Automatic callout to the remote control station in case of predefined critical

alarms. Communication with the remote central control station using GPRS Network

or other media like GSM, 3G, PSTN, Leased Lines, Radio, VSAT etc. using

established and field proven IEC 60870-5-104. Scalable to SCADA.

Sub-station will have a unique aesthetic view in a crowded city.


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33/11 KV

unmanned

Remotecontrolled s/s

within

25Mx15M

space


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33/11 KV s/s at Judges Filed Guwahati with 2 Nos. 5 MVA

Transformers.

33/11 KV S/s at Kamakhya Guwahati


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33/11 KV S/s at Kamakhya, Guwahati

with 2x5MVA Trfr.


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Unmanned 33/11 KV , 10 MVA s/s at Nalagarh, HP


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Pole mounted 11 KV Breakers/AR ( Sub station Application)

Channel Mounted 33 KV Breakers (SS Aplication)


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Channel Mounted 33 KV Breakers (SS Aplication)


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Typical layout of 33/11 KV s/s with 2 Nos. 5 MVA Trfr.


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ArchitectureGPRS

Future Substations (up to 30 nos.)

14 LCD

Remote Accessto maintenance

staff

ADSL Line

Substation # 1

Ethernet Switch

Leased Line

BreakerControlCubicle





Rs232 toEthernet

Converters(If required)

RS 232or

Ethernet Port

RS 232Nulec Direct

Protocol

RS 232Nulec Direct

Protocol

RS 232Nulec Direct

Protocol

RS 232Nulec Direct

Protocol

1

SEPAMT-87

EnergyMeters

Twisted Pair Cu

CA

T5

RS 485 (Modbus)

2 3 4 n

GPRS Router

Ethernet Switch

Leased Line

CAT

5

GPRS Router

14 LCD

Control Center

ADSL Line

M2MGateway

GPRS Cloud


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ArchitectureASEB (Judges Field S/S)

GPRS(DHBVNs Scope)

GPRS M2M GatewayLeased Line with Static IP

VPN Tunnel

Nulec Direct TCP/Modbus

VPN Tunnelusing Remote Moblie VPN

WSOS

SMSor

3rd party SCADA

Judges Field S/S

Judges Field S/S

Protocol GatewayTwo way with Dynamic IPs

Service provider independent VPN

Data encryption

Firewall

Scalable to any third party SCADA

33KV Remote controlled VCB substation application


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33KV Remote controlled VCB- substation application

33KV substation and feeder breaker


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33 KV b k i 33/11 KV S/S ith 33/11 KV t f


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33 KV breaker in 33/11 KV S/S with 33/11 KV transformer

33KV outdoor VCB Breaker in Pandav-Nagar ( Delhi)


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33KV Pole Mounted Breaker protecting a 10 MVA 33/11 KV


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33KV Pole Mounted Breaker protecting a 10 MVA 33/11 KV

Transformer

M k th t


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Make the mostof your energy


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Thank You!!

schneider ppt - autorecloser _ sectionalizer (1)

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