Synchronizing Relay

1. INTELLIGENT DIGITAL
SYNCHRONIZING RELAY WITH
REAL TIME MONITORING AND
CONTROL

2. OBJECTIVE :
Todevelopandimplementaninnovative
digitalversionoftheexistingconventional
modelofanalogsynchronizingrelay,thereby
upgradingtheexistingdesign,ensuring
effectiveandreliableoperationwiththe
compactmodelatverylowdesigncost.

3. EXISTING MODEL OF SYNCHRONIZING TROLLEY :

4. COMPACTNESS OF OUR MODEL:

5. Block diagram of the proposed model:

6. Voltage Sampling Circuit:

7. Frequency Sampling Circuit :

8. D
PULSE 1
CCP1 RE DETECTION
TIMER ON
PULSE 2
CCP1 REDETECTION
TIMER OFF
SHIFT =( D/20000uSEC * 120)-180
METHOD OF PHASE SHIFT TECHNIQUE :

9. Overall Sampling Circuit of the Project

11. MICROCONTROLLER UNIT

13. MODE
PRIMARY
SAMPLING
CVT
SECONDARY
SAMPLING
(230V/ 0-12V)
ADC OUTPUT
MULTIPLICATION
FACTOR400
400KV L-L = 110V
L-N = 63.5V
0-3.3V 0-1023
0.66568047337
230KV L-L = 110V
L-N = 63.5V
0-3.3V 0-1023
0.3397341211
110KV L-L = 110V
L-N = 63.5V
0-3.3V 0-1023
0.1624815361

14. CIRCUIT BREAKER ACTUATION CIRCUIT :

15. Proposed module of interfacing HMI with the kit

17. Advancements of the proposed model :
1.The proposed model is a compact digital model.
2.The model also replaces the bulkier trolleys with
enhanced operation as it is interfaced with real time
monitoring and control.
3.More simpler, effective and reliable synchronization is
ensured at very low design cost.
4.Best suited for synchronization at multiple voltage levels
5.Depending on the healthiness of the system, it can be
operated in manual or automatic mode.
6.Response time of the relay is less then 20ms, which
makes it more efficient compared to the analog ones.

18. Project testing :
Thisprojectwastestedandverifiedinareal
timepracticalenvironment,byconnectingthemodel
tothebusbarprotectionpanelofa230KVfeederat
400/230-110KVsubstationatAlamathy,Chennai.
Itisworthytobenotedthatthemodelwas
demonstratedinthepresenceofallEngineersof
Alamathysubstationand230KVKorattursubstation
andwascertifiedtobeaqualityrelay.

19. End note :
Asperourobjective,theproposed
compactdigitalmodelhasbeenprovedto
offermoreenhancedoperationasitis
interfacedwithrealtimemonitoring,thereby
ensuringsimpler,effectiveandreliable
synchronizationatverylowdesigncost.
WethankallourCollegefaculties,
mentorsandfieldEngineersforguidingand
motivatingusthroughoutthecourseof
projectwork.