Jana Front 1142009
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COLD GAS MANAGEMENT FOR 210 MW GENERATOR WITH VB FRONT END PROJECT REPORT Submitted by
P.PRABAKARAN T.PRABU A.KRISHNA KUMAR A.S.JANARTHANAN
61805105070 61805105072 61805105304 61805105501
in partial fulfillment for the award of the degree of
BACHELOR OF ENGINEERING in ELECTRICAL AND ELECTRONICS ENGINEERING
SONA COLLEGE OF TECHNOLOGY SALEM-636005
ANNA UNIVERSITY : CHENNAI 600 025 MAY 2009
ANNA UNIVERSITY, CHENNAI 600 025. BONAFIDE CERTIFICATE Certified that this project report “COLD GAS MANAGEMENT FOR 210 MW GENERATOR WITH VB FRONT END” is the bonafide work of
P.PRABAKARAN (61805105070),
T.PRABU (61805105072) ,
A.KRISHNA KUMAR(61805105304), A.S.JANARTHANAN. (61805105501), who carried out the project work under my supervision.
SIGNATURE Prof.C.EASWARLAL, B.E., M.Sc (Engg) HEAD OF THE DEPARTMENT Electrical and Electronics Engg. Sona College of Technology, Salem-636005.
Internal Examiner
SIGNATURE Prof.M.SENTHIL KUMAR, M.E., SUPERVISOR ASSISTANT PROFESSOR, Electrical and Electronics Engg. Sona College of Technology, Salem-636005.
External Examiner
NEYVELI LIGNITE CORPORATION LIMITED (A Government of India Enterprise) NEYVELI
CERTIFICATE This is to certify that the project entitled
COLD GAS MANAGEMENT FOR 210 MW GENERETOR WITH VB FRONT END Submitted by SL.NO.
NAME
1. 2. 3. 4.
P.PRABAKARAN T.PRABU A.KRISNHA KUMAR A.S.JANARTHANAN
REG.NO. 61805105070 61805105072 61805105304 61805105501
In partial fulfillment of the requirements for the award of
BACHELOR OF ENGINEERING (Electrical and Electronics Engineering from the Anna University ) is the bonafide project work of the candidates and the same work done under my guidance and supervision during 28.02.2009 to 23.03.2009 at MINES-I, NLC Limited, Neyveli as a project work.
External Guide MR.D.ARUL CM/ELECTRICAL/MINES I Permitted to submit this project Report to University / College authorities
Date : Place : Neyveli.
Deputy General Manager/T&D Training Complex, NLC Ltd.,
ACKNOWLEDGEMENT First and foremost we wish to thank God, the almighty for enabling the successful completion of the project. We feel honored to place our warm salutations to Sona College of Technology & Department of EEE, which has given the opportunity to obtain chaired goal of beckoning professional. We are deeply indebted and express our profound thanks to our honorable Principal Dr. GOVIDARAJAN, B.Sc, B.E, M.Sc(Engg), Ph.D., Sona College of Technology, for his valuable support and encouragement. We express our heartfelt thanks to Prof.C.EASWARLAL, B.E, M.Sc(ENGG), Ph.D., Head of the Department of Electrical and Electronics Engineering, Sona College of Technology, Salem for inspiration and valuable suggestions for carrying out this endeavor. We are extremely thankful to Prof. M.SENTHIL KUMAR, M.E, Assistant Professor, Department of Electrical and Electronics Engineering, Sona College of Technology, Salem for his enthusiastic and persistent guidance rendered throughout the course of the work. We are very much thankful to express our profound gratitude and sincere thanks to Sri.C.Govindarajulu, DGM, training complex, Neyveli Lignite Corporation, ltd. We wish to express our sincere thanks to our respected guide Mr.ARUL, CM/Electrical, MINES-I for his invaluable guidance to complete our project. We express our thanks to Mr.Chester, ACM/ELECTRICAL/TPS-II to do the project successfully. We wish to express our sincere thanks to all those who helped us in making this project successful.
DECLARATION
We hereby declare that the project report entitled “COLD GAS MANAGEMENT FOR 210 MW GENERATOR WITH VB FRONT END” Submitted by us is our own independent project work done under the guidance of Mr.D.ARUL/CM/Electrical, MINES-I. In the partial fulfillment of the requirement for the award of bachelor degree in engineering in Electrical and Electronics Engineering from Sona College of Technology, Salem-5. This project in for reference only and no part of the report will be published or copied anywhere without the written permission from Neyveli Lignite Corporation officials.
Place: Date:
Signature 1. 2. 3. 4.
ABSTRACT
The cold gas management system is very important auxiliary system for Generator. At full load condition, the stator current will be around 3x9500A. In addition to the stator current, the rotor current of 1800A is also there. These stator and rotor currents generate enormous heat energy and raise the temperature level inside the Generator casing. The abnormal temperature level, damage the stator and rotor windings. To avoid the damage, the winding should be cooled. So we have to recover heat energy from the generator inner casing then and there. The cold gas management is responsible for this activity. Hydrogen is used as heat recovery media in the Generator. The main component of cold gas management system is Hydrogen cooler. In the Hydrogen cooler, chilled water is circulated through tube coils. The cold gas management system monitors H2 temperature at the cooler outlet, namely cold gas temperature. As per the manufacturer recommendation, it must be maintained at 44oC. By varying the flow of chill water through the H2 cooler, the temperature (cold gas temperature) will be maintained. If there is any further raise in temperature, H2 booster pump has to be switched on. Similarly, there are other indirect measures will be initiated for maintaining the cold gas temperature at 44oC. The various set points can be programmed through the matrix key pad We have decided to develop an embedded based prototype system to meet the said above requirements. The various activities and parameters will be annunciated as a remote one to the Unit Control Room.
TABLE OF CONTENTS CHAPTER NO.
1.
2.
TITLE ABSTRACT
INTRODUCTION 1.1 Overview Of NLC
1
1 . 2 I n d u s t r i a l S e c t o r s I n NL C
1
INTRODUCTION TO 210 MW GENERATOR 2.1 Salient Features & Specification
3.
PAGE NO
8
2.2 Cooling Process
12
2.3 Advantages Of Hydrogen Cooling
13
2.4 Generation Of Hydrogen
14
2.5 Hydrogen Gas System
15
COLD GAS MANAGEMENT SYSTEM 3.1 Circuit Logic
18
3.2 VB Explanation
20
3.3 Circuit Diagram
21
3.4 Power Supply Module
22
3.5 Relay Module
24
4.
5.
6.
MICRO-CONTROLLER AT89C52 4.1 Features
26
4.2 Description
26
4.3 Block Diagram
27
4.4 Pin Details
29
4.5 Advantages
30
ANALOG TO DIGITAL CONVERTER 8591 5.1 Features
33
5.2 General Description
33
5.3 Block Diagram
34
5.4 Functional Description
34
5.5 Pin Diagram
36
5.6 Applications
38
LIQUID CRYSTAL DISPLAY 6.1 Pin Details
7. 8.
39 39
SERIAL COMMUNICATION (RS232)
40
PROGRAM
41
9.
CONCLUSION
72
LIST OF FIGURES S. NO.
TITLE
PAGE NO.
1.
Hydrogen gas system
15
2.
Cold gas system
3.
VB Platform
4.
Circuit Diagram
20
5.
Power supply module
23
6.
ULN 2003 pin diagram
25
7.
89C51 Block Diagram
28
8.
89C51 pin diagram
29
9.
PCF 8591 Block diagram
34
10.
PCF 8951 pin diagram
36
17 19
P.PRABAKARAN T.PRABU A.KRISHNA KUMAR A.S.JANARTHANAN
61805105070 61805105072 61805105304 61805105501
in partial fulfillment for the award of the degree of
BACHELOR OF ENGINEERING in ELECTRICAL AND ELECTRONICS ENGINEERING
SONA COLLEGE OF TECHNOLOGY SALEM-636005
ANNA UNIVERSITY : CHENNAI 600 025 MAY 2009
ANNA UNIVERSITY, CHENNAI 600 025. BONAFIDE CERTIFICATE Certified that this project report “COLD GAS MANAGEMENT FOR 210 MW GENERATOR WITH VB FRONT END” is the bonafide work of
P.PRABAKARAN (61805105070),
T.PRABU (61805105072) ,
A.KRISHNA KUMAR(61805105304), A.S.JANARTHANAN. (61805105501), who carried out the project work under my supervision.
SIGNATURE Prof.C.EASWARLAL, B.E., M.Sc (Engg) HEAD OF THE DEPARTMENT Electrical and Electronics Engg. Sona College of Technology, Salem-636005.
Internal Examiner
SIGNATURE Prof.M.SENTHIL KUMAR, M.E., SUPERVISOR ASSISTANT PROFESSOR, Electrical and Electronics Engg. Sona College of Technology, Salem-636005.
External Examiner
NEYVELI LIGNITE CORPORATION LIMITED (A Government of India Enterprise) NEYVELI
CERTIFICATE This is to certify that the project entitled
COLD GAS MANAGEMENT FOR 210 MW GENERETOR WITH VB FRONT END Submitted by SL.NO.
NAME
1. 2. 3. 4.
P.PRABAKARAN T.PRABU A.KRISNHA KUMAR A.S.JANARTHANAN
REG.NO. 61805105070 61805105072 61805105304 61805105501
In partial fulfillment of the requirements for the award of
BACHELOR OF ENGINEERING (Electrical and Electronics Engineering from the Anna University ) is the bonafide project work of the candidates and the same work done under my guidance and supervision during 28.02.2009 to 23.03.2009 at MINES-I, NLC Limited, Neyveli as a project work.
External Guide MR.D.ARUL CM/ELECTRICAL/MINES I Permitted to submit this project Report to University / College authorities
Date : Place : Neyveli.
Deputy General Manager/T&D Training Complex, NLC Ltd.,
ACKNOWLEDGEMENT First and foremost we wish to thank God, the almighty for enabling the successful completion of the project. We feel honored to place our warm salutations to Sona College of Technology & Department of EEE, which has given the opportunity to obtain chaired goal of beckoning professional. We are deeply indebted and express our profound thanks to our honorable Principal Dr. GOVIDARAJAN, B.Sc, B.E, M.Sc(Engg), Ph.D., Sona College of Technology, for his valuable support and encouragement. We express our heartfelt thanks to Prof.C.EASWARLAL, B.E, M.Sc(ENGG), Ph.D., Head of the Department of Electrical and Electronics Engineering, Sona College of Technology, Salem for inspiration and valuable suggestions for carrying out this endeavor. We are extremely thankful to Prof. M.SENTHIL KUMAR, M.E, Assistant Professor, Department of Electrical and Electronics Engineering, Sona College of Technology, Salem for his enthusiastic and persistent guidance rendered throughout the course of the work. We are very much thankful to express our profound gratitude and sincere thanks to Sri.C.Govindarajulu, DGM, training complex, Neyveli Lignite Corporation, ltd. We wish to express our sincere thanks to our respected guide Mr.ARUL, CM/Electrical, MINES-I for his invaluable guidance to complete our project. We express our thanks to Mr.Chester, ACM/ELECTRICAL/TPS-II to do the project successfully. We wish to express our sincere thanks to all those who helped us in making this project successful.
DECLARATION
We hereby declare that the project report entitled “COLD GAS MANAGEMENT FOR 210 MW GENERATOR WITH VB FRONT END” Submitted by us is our own independent project work done under the guidance of Mr.D.ARUL/CM/Electrical, MINES-I. In the partial fulfillment of the requirement for the award of bachelor degree in engineering in Electrical and Electronics Engineering from Sona College of Technology, Salem-5. This project in for reference only and no part of the report will be published or copied anywhere without the written permission from Neyveli Lignite Corporation officials.
Place: Date:
Signature 1. 2. 3. 4.
ABSTRACT
The cold gas management system is very important auxiliary system for Generator. At full load condition, the stator current will be around 3x9500A. In addition to the stator current, the rotor current of 1800A is also there. These stator and rotor currents generate enormous heat energy and raise the temperature level inside the Generator casing. The abnormal temperature level, damage the stator and rotor windings. To avoid the damage, the winding should be cooled. So we have to recover heat energy from the generator inner casing then and there. The cold gas management is responsible for this activity. Hydrogen is used as heat recovery media in the Generator. The main component of cold gas management system is Hydrogen cooler. In the Hydrogen cooler, chilled water is circulated through tube coils. The cold gas management system monitors H2 temperature at the cooler outlet, namely cold gas temperature. As per the manufacturer recommendation, it must be maintained at 44oC. By varying the flow of chill water through the H2 cooler, the temperature (cold gas temperature) will be maintained. If there is any further raise in temperature, H2 booster pump has to be switched on. Similarly, there are other indirect measures will be initiated for maintaining the cold gas temperature at 44oC. The various set points can be programmed through the matrix key pad We have decided to develop an embedded based prototype system to meet the said above requirements. The various activities and parameters will be annunciated as a remote one to the Unit Control Room.
TABLE OF CONTENTS CHAPTER NO.
1.
2.
TITLE ABSTRACT
INTRODUCTION 1.1 Overview Of NLC
1
1 . 2 I n d u s t r i a l S e c t o r s I n NL C
1
INTRODUCTION TO 210 MW GENERATOR 2.1 Salient Features & Specification
3.
PAGE NO
8
2.2 Cooling Process
12
2.3 Advantages Of Hydrogen Cooling
13
2.4 Generation Of Hydrogen
14
2.5 Hydrogen Gas System
15
COLD GAS MANAGEMENT SYSTEM 3.1 Circuit Logic
18
3.2 VB Explanation
20
3.3 Circuit Diagram
21
3.4 Power Supply Module
22
3.5 Relay Module
24
4.
5.
6.
MICRO-CONTROLLER AT89C52 4.1 Features
26
4.2 Description
26
4.3 Block Diagram
27
4.4 Pin Details
29
4.5 Advantages
30
ANALOG TO DIGITAL CONVERTER 8591 5.1 Features
33
5.2 General Description
33
5.3 Block Diagram
34
5.4 Functional Description
34
5.5 Pin Diagram
36
5.6 Applications
38
LIQUID CRYSTAL DISPLAY 6.1 Pin Details
7. 8.
39 39
SERIAL COMMUNICATION (RS232)
40
PROGRAM
41
9.
CONCLUSION
72
LIST OF FIGURES S. NO.
TITLE
PAGE NO.
1.
Hydrogen gas system
15
2.
Cold gas system
3.
VB Platform
4.
Circuit Diagram
20
5.
Power supply module
23
6.
ULN 2003 pin diagram
25
7.
89C51 Block Diagram
28
8.
89C51 pin diagram
29
9.
PCF 8591 Block diagram
34
10.
PCF 8951 pin diagram
36
17 19
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