OPERATION AND MAINTENANCE OF SF6 GAS SYSTEM AT MASINLOC COAL-FIRED THERMAL POWER PLANT
MARK IDOL GONZALES MARCELO
2002-07851
SUBMITTED TO THE FACULTY OF THE
COLLEGE OF ENGINEERING AND AGRO-INDUSTRIAL TECHNOLOGY, UNIVERSITY OF THE PHILIPPINES LOS BAÑOS
IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF
BACHELOR OF SCIENCE IN ELECTRICAL ENGINEERING
MARCH 2010
ix
ix TABLE OF CONTENTS
Biographical Sketch iii
Acknowledgement v
Table of Contents ix
List of Figures x
List of Tables xii
I. Introduction
A. Description of the Study 1
B. Significance of the Study 1
C. Objectives 2
D. Scope and Limitations 3
E. Date and Place of Study 3
F. Company Profile 4
G. Training Activities 7
II. Review of Literature 10
III. Methodology 22
IV. Discussion and Analysis 23
V. Observations 52
VI. Conclusion 54
VII. Recommendations 56
Literature Cited
Appendixes
ix LISTS OF FIGURES
Figure No. Description Page
1 The Masinloc Coal-Fired Thermal Power Plant 4
2 Location of the Masinloc Coal-Fired Thermal Power Plant 4
3 Sulfur Hexafluoride – 3D – view 12
4 Sulfur Hexafluoride – 3D – balls 12
5 Sulfur Hexaflouride – 2D dimensions 12
6 Circuit breaker 16
7 Disconnecting Switch 16
8 A more close look at disconnecting switch 18
9 Earthing Switch 19
10 Current transformer 20
11 Voltage transformer 21
12 SF6 Gas System Scheme 25
13 SF6 Gas System Scheme of Bay 1 26
14 An illustration of the Bay 1 of the 230 kV Gas Insulated 27
Substation showing some of its parts 15 Gas Monitoring Box of each compartment 28
16 Temperature Compensated Gas Pressure Switch 29
17 Gas Monitoring Cabinet of the Circuit Breaker 30
(per phase) Compartment 18 Temperature Gas Compensated Switch under normal operation 31
19 Principle and Structure of Gas Temperature Compensating Switch 31
x 20 Pressure – Temperature Characteristics of SF6 gas for 5kg/cm2 32 21 The Local Control Cabinet of the Gas Insulated Substation 33
22 The SF6 gas System Control Panel inside the 33
Central Control Room
23 The gas flow diagram of the SF6 gas circuit breaker 34 24 The gas supply port (per phase) of the circuit breaker. 35 25 Flow Diagram showing the process if SF6 pressure drop happens 36 26 Actual Metal Plate Graph of Temperature-Pressure 37
Characteristics for SF6 gas for 5kg/cm2
27 The SF6 Gas Handling Equipment Type KGH – 05 38
28 Block Diagram of Evacuation of SF6 39
29 The flow diagram of the SF6 Gas Handling Equipment 40 Type KGH – 05
30 The graphic nameplate of the SF6 Gas Handling Equipment 41 Type KGH – 05
31 Block Diagram of Evacuation Process of SF6/Air 42 32 Block Diagram of Evacuation Process of SF6/Air 43 33 Block Diagram of Evacuation Charging of SF6/Air 44 34 The SF6 gas cylinder with its components for gas supply. 45
35 The pressure gauge meter for SF6 Gas System 46
36 Data sheet for gas equipment having only one gas section 48
37 Leak Check with Soapsuds 49
38 Method for SF6 Gas Leak Check 50
xi LISTS OF TABLES
Table No. Description Page
1 Data For Gas Leak Test 47
2 Hours and Person Required for Regular Inspection 51
