1.0.1 This Standard was developed to make secondary design of fossil-fired power plant and substation meets the requirements of safety and reliability, technical advancement, economy and suitability and national conditions.
1.0.2 This Standard specifies principles and standards that the electric secondary design of power plant and substation shall comply with.
1.0.3 This Standard is applicable to the newly-built fossil fired power plant with single machine rated capacity of 12 MW~1000 MW Grade and newly-built substation with unit set transformer rated capacity of 5 MV•A and above.
1.0.4 As for the design of secondary wiring, experiences shall be continuously summed up, and identified new technology and new products shall be adopted and promoted actively and cautiously.
1.0.5 Secondary wiring design shall actively adopted the standard design and typical design passing audit to improve design quality and create conditions to protect and control the standardization production of equipment.
1.0.6 Circuits with the voltage above 250 V should not enter control and protection screen.
Foreword I
1 General Provisions 1
2 Terms 2
3 Control Mode 4
3.1 Control Mode of Electrical Equipment 4
3.2 Electrical Equipment Control of Power Plant 4
3.3 Electrical Equipment Control of Substation 7
4 Arrangement of Control Room, Relay Room and its Panel (or Platform) 7
4.1 General Provisions 8
4.2 Layout of Electrical Control Room 9
4.3 Layout of Relay Room 10
4.4 Layout of Center Control Room and Unit Control Rooms 11
4.5 Layout of Control Panel (or Platform) and Relay Board 12
5 Basic Requirements on Secondary Circuit Design 14
5.1 Control System 14
5.2 Signal System 16
5.3 Measurement System 18
5.4 Alternate Current and Voltage Circuit 19
6 Wiring of Installation Units in Control Room 24
6.1 Generator 24
6.2 Transformer and Shunt Reactor 25
6.3 Power Transmission Circuit 27
6.4 Compensation Device 28
6.5 Busbar Equipment 30
6.6 Power Source of Plant (or Station) 32
6.7 Fault Wave Recording Device 34
6.8 Time Synchronizing System 35
6.9 On-line Monitoring System 37
6.10 Visual Monitoring of Switchyard 38
7 Selection and Allocation of Secondary Circuit Equipment 39
7.1 Selection of Control and Signal Equipment 39
7.2 Protection Equipment of Secondary Circuit 41
7.3 Mini-bus Bar and Secondary Circuit Label 43
7.4 Terminal Block 44
7.5 Control Cable 46
8 Excitation System 49
8.1 General Provisions 49
8.2 Type of Excitation System 51
8.3 Signal of Excitation System 56
8.4 Layout and Environment Requirements of Excitation Cabinet 57
9 Synchronization System 57
10 DC System and UPS 59
10.1 DC System 59
10.2 UPS 59
11 DCS Control of Electrical System in the Power Plant 62
11.1 Basic Requirement and Configuration Principle 62
11.2 Control Range 62
11.3 Monitoring Range 62
11.4 Backup Operation 63
11.5 Data Acquisition 63
11.6 Communication Interface 63
11.7 Sequence Control 63
11.8 Real Time Display Diagram 64
11.9 Performance Calculation and Report Management 64
12 The Computer Control for Power Network of Substation and Power Plant 65
12.1 Basic Requirement and Configuration Principle 65
12.2 Function 65
12.3 Control Range 66
12.4 Monitoring Range 66
12.5 Network Structure and Bay Layer Arrangement 66
12.6 Data Acquisition 66
12.7 Real Time Display Diagram 67
12.8 Performance Calculation and Report Management 67
12.9 Communication Interface 67
13 ECMS Control of Electrical System in the Power Plant 67
13.1 Basic Requirement and Configuration Principle 67
13.2 Function 68
13.3 Control Range 68
13.4 Monitoring Range 69
13.5 Network Structure and System Component 69
13.6 Data Acquisition 70
13.7 Real Time Display Diagram 70
13.8 Interface 70
14 Relaying Protection and Security Automatic Equipment 71
14.1 Relay Protection 71
14.2 Security Automatic Equipment 72
14.3 Protection and Fault Information Management System 72
15 Automation of Power System Dispatching 73
15.1 Remote Telecontrol Unit (RTU) 73
15.2 Electric Energy Metering 73
15.3 Automatic Voltage Control (AVC) 74
15.4 Phasor Measurement Unit (PMU) 74
15.5 Security Protection of Secondary System 75
16 Grounding and Anti-interference 75
16.1 Routine Secondary Circuit and Grounding of Equipment 75
16.2 Anti-interference Grounding 75
16.3 Grounding of the Computer System 77
16.4 Other Anti-explosion Measures 78
Appendix A Panel Spacing and Channel Width in the Control Room 80
Appendix B Color Type of Simulated Bus Bar 81
Appendix C Information List for Fault Wave Recording Device 82
Appendix D Technical Requirements of Time Synchronizing between Devices in the Power Plant and Substation 84
Appendix E Configuration of Switchgear Camera 85
Appendix F Color Type of Mini-bus Bar 86
Appendix G Mini-bus Bar Symbols and Circuit Labels 87
Appendix H Number Labels of Secondary DC Circuit 91
Appendix J Labels of Secondary AC Circuit 94
Appendix K AVR Performance and Performances of Excitation Systems under AVR Control 98
Appendix L Common Loads of UPS in the Power Plant and Substation 100
Appendix M I/O Data List for Generator Transformer Unit 101
Appendix N I/O Data List for Power Network in the Substation and Power Plant 103
Explanation to Wording in This Code 106
List of Quoted Standards 107
