Schneider PPT Autorecloser Sectionalizer

ISGF Technology Session

Improving System Reliability throughAutomating Rural Feeders and

Substations

Amit Sharma27th April 2012

Automatic Circuit Reclosers and Sectionalizers

Amit Sharma24th Nov 2011

Schneider Electric 3- Energy – MONTHLY 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-reclose” cycle should clear the fault

“lock out” of the section


What is a Recloser ?

● A Recloser is a protection device:● For overhead power lines● It is a circuit breaker with more arduous

test & install conditions● Designed to RECLOSE on to a fault.

● Terminology● The “auto-reclose” cycle

●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


What is a Sectionaliser ?

● A Sectionaliser is 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


Benefit to the Customer● Improved reliability of power supply

● Quality of supply● Automatic 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

MV NETWORK MANAGEMENT


- 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 shortsections

Redundant networks Reliable components…

With Fault Passage Indicators (FPI’s) Or with remote controlled load break switches Or with fully automated reclosers and sectionalizers


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

O15 s

Time

100%



R

15 s

C

O15 s

15 s

Time

100%



R

15 s

C

O15 s

15 s

Time2 mn

100%



R1

- temporary fault: TWO reclosers

R2


R1Network A- 50%

Network B- 50%

Network B

Time

- temporary fault: TWO reclosers

R2


- permanent faults

Permanent faults cannot be cleared by automatic reclosing

To manage “permanent faults”, the best solution is to add some

“sectionalizers”


R

5H – 6H

100%

- case 1: no network automationPermanent fault


R

5H – 6H

100% 95%

- case 1: no network automationPermanent fault


R

- case 2: addition of non-communicating fault passage indicators (FPI)An FPI for each branch of the network

Add an FPI around each major «obstacle»…


- case 3: addition of communicating FPIs

R

Put several communicating FPIs in strategic locations


- case 4: addition of communicating FPIs and remote controlled load break switches

RT

TT

T

T remote controlled load break switchesCommunicating FPI


- case 5: recloser and sectionalizer load break switches

R



● S1 = opens after ONE reclosing operation ● S2 = opens after TWO reclosing operations● S3 = opens after THREE reclosing operations● S4 = opens after FOUR reclosing operations

Sectionaliser load break switches are always associated with a recloser or circuit breaker:


S4

S3

S3

S2

S1

1 1

1 S2


R

Permanent fault


S4

S3

S3

S2

S1

2 2

2 S2


R

Permanent fault


S4

S3

S3

S2

S1

2 2

2 S2


R

Permanent fault

2’


S4

S3

S3 S2

S2

S1


R

Permanent fault

2’ 60’

75%

95%


- summary of overhead networks 1/2Permanent fault

95%Case 2

A recloser

+ FPIs3 h

6 h

95%

Case 1

A recloser

95%Case 3

A recloser

+ FPI with Com1h30


- summary of overhead networks 2/2Permanent fault

95%

1h

2’

75 %Case 5

A recloser

and sectionalizers

95%

1h

10’

70 %Case 4: A recloser,

remote controlled switches

and FPI with Com


●SAIDI (System Average Interruption Duration Index) can vary from a few minutes to several hours,

●SAIFI (System Average Interruption Frequency Index) can vary from 1 to 10 and more, depending on :

● population density (rural or urban area)● proportion between underground and overhead distribution● maximum accepted costs for non distributed energy

Excellent Average Poor Urban area < 10 mn 30 mn >2 hrsRural area < 30 mn 2 hrs >10 hrs

Permanent Interruptions (>1 mn)

SAIDI/SAIFI variations – Quality Power


33/11 KV Unmanned Remote Controlled S/s


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, measurement

KW,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.


33/11 KV unmannedRemote controlled s/s within 25Mx15M space


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


33/11 KV S/s at Kamakhya, Guwahati with 2x5MVA Trfr.


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


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


Channel Mounted 33 KV Breakers (SS Aplication)


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


Architecture – GPRS

Future Substations (up to 30 nos.)

14 ” L C D

Remote Accessto maintenance

staff

ADSL Line

Substation # 1

Ethernet Switch

Leased Line

B r e a k e rC on t ro lC ub ic le

B r e a k e rC o n t ro lC u b ic le



B r e a k e rC on t ro lC ub ic le

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

T 5

RS 485 (Modbus)

2 3 4 n

GPRS Router

Ethernet Switch

Leased Line

CA

T 5

GPRS Router

14 ” L C D

Control Center

ADSL Line

M2MGateway

GPRS Cloud


Architecture – ASEB (Judge’s Field S/S)

GPRS(DHBVN’s Scope)

GPRS M2M Gateway Leased Line with Static IP

VPN Tunnel

Nulec Direct TCP/Modbus

VPN Tunnel using Remote Moblie VPN

WSOSSMS

or3rd party SCADA

Judge’s Field S/S

Judge’s Field S/S

Protocol GatewayTwo way with Dynamic IPsService provider independent VPNData encryptionFirewallScalable to any third party SCADA


33KV Remote controlled VCB- substation application


33KV substation and feeder breaker


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


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


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


Make the mostof your energy™


Thank You!!

Schneider PPT Autorecloser Sectionalizer

Documents

Transcript of Schneider PPT Autorecloser Sectionalizer