Detail of GB/T 12668.4-2006

Introduction of GB/T 12668.4-2006

1 Scope This part applies to adjustable speed a.c. drive systems that include power conversion, control equipment and a motor. Excluded are traction for railway applications and electrical vehicle drives. It applies to power drive systems (see Figure 1) with converter voltages (line-to-line voltage), between 1 kV a.c. and 35 kV a.c., input side 50 Hz or 60 Hz, and load side frequencies up to 600 Hz. Requirements for voltages above 15 kV are not included and are defined by agreement between the manufacturer and the system supplier. For power drive systems, with voltages above 1 kV, using a step-down input transformer and/or a step-up output transformer in connection with a low voltage converter (below 1 000 V), GB/T 12668.2-2002 applies. EMC aspects are covered in GB 12668.3-2003. Specific safety requirements for drive systems with voltage above 1 kV will be covered in IEC 61800-5. This part gives the characteristics of the converters, their topologies and their relationship with the complete a.c. drive system. It also states their performance requirements with respect to ratings, normal operating conditions, overload conditions, surge withstand capabilities, stability, protection, a.c. line earthing, topologies and testing. Furthermore, it deals with application guidelines, such as control strategies, torsion analysis, recommendations for earthing and drive system component integration. 2 Normative References The following normative documents contain provisions which, through reference in this part of GB/T 12668, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this part. However parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition applies. GB 755 Rotating Electrical Machines - Rating and Performance (GB 755-2000, idt IEC 60034-1: 1996) GB 1094.2-1996 Power Transformers – Part 2: Temperature Rise (eqv IEC 60076-2: 1993) GB/T 1993-1993 Rotating Electrical Machines – Part 6: Methods of Cooling (eqv IEC 60034-6: 1991) GB/T 2900.18-1992 Electrotechnical Terminology－Low Voltage Apparatus (eqv IEC 60050-441: 1984) GB/T 2900.56-2002 Electrotechnical Terminology - Automatic Control (IEC 60050-351: 1998, IDT) GB/T 2900.61-2002 Electrotechnical Terminology - Physics and Chemistry (eqv IEC 60050-111: 1996) GB/T 3859.1-1993 Semiconductor Converters - Specification of Basic Requirements (eqv IEC 60146-1-1: 1991) GB/T 3859.2-1993 Semiconductor convertors - Application Guide (eqv IEC 60146-1-2: 1991) GB/T 3859.3-1993 Semiconductor Convertors - Transformers and Reactors (eqv IEC 60146-1-3: 1991) GB/T 3886.1-2001 Semiconductor Power Convertors - Adjustable Speed Electric Drive Systems - General Requirements - Part 1: Rating Specifications, Particularly for d.c.Motor Drives (IDT IEC 61136-1: 1992) GB/T 4208-1993 Degrees of Protection Provided by Enclosure (IP code) (eqv IEC 60529: 1989) GB/T 4942.1 Classification of Degrees of Protection Provided by Enclosures of Rotating Electrical Machines (IP code) (GB/T 4942.1-2001, IDT IEC 60034-5: 1991) GB 6450-1986 Dry-type Power Transformers (eqv IEC 60726: 1982) GB 10068-2000 Mechanical Vibration of Certain Machines with Shaft Heights 56 mm and Higher - Measurement, Evaluation and Limits of Vibration (IDT IEC 60034-14: 1996) GB/T 12668.2-2002 Adjustable Speed Electrical Power Drive Systems - Part 2: General Requirements - Rating Specifications for Low Voltage Adjustable Frequency a.c. Power Drive Systems (IDT IEC 61800-2: 1998) GB 12668.3-2003 Adjustable Speed Electrical Power Dive Systems - Part 3: EMC Product Standard Including Specific Test Methods (idt IEC 61800-3: 1996) GB/T 13499-2002 Power Transformer - Application Guide (idt IEC 60076-8: 1997) GB/T 17626.7-1998 Electromagnetic Compatibility - Testing and Measurement Techniques - General Guide on Harmonics and Interharmonics Measurements and Instrumentation, for Power Supply Systems and Equipment Connected Thereto (IDT IEC 61000-4-7: 1991) GB/T 17950-2000 Semiconductor Converter - Part 6: Application Guide for the Protection of Semiconductor Converters Against Overcurrent by Fuses (idt IEC 60146-6: 1992) GB/T 18039.4-2003 Electromagnetic Compatibility - Environment - Compatibility Levels in Industrial Plants for Low-frequency Conducted Disturbances (IEC 61000-2-4: 1994, IDT) GB/T 18494.1-2001 Convertor Transformers - Part 1: Transformers for Industrial Applications (idt IEC 61378-1: 1997) IEC 60034-2: 1972 Rotating Electrical Machines - Part 2: Methods for Determining Losses and Efficiency of Rotating Electrical Machinery form Tests (Excluding Machines for Traction Vehicles) Amendment 1 (1995) Amendment 2 (1996) IEC 60034-2A: 1974 Rotating Electrical Machines - Part 2: Methods for Determining Losses and Efficiency of Rotating Electrical Machinery form Tests (Excluding Machines for Traction Vehicles) - First Supplement: Measurement of Losses by the Calorimetric Method IEC 60034-7 Rotating Electrical Machines - Part 7: Classification of Types of Constructions and Mounting Arrangements (IM Code) IEC 60034-9: 1997 Rotating Electrical Machines - Part 9: Noise Limits IEC 60034-17: 1998 Rotating Electrical Machines - Part 17: Cage Induction Motors When Fed From Converters – Application Guide IEC 60034-18-31: 1992 Rotating Electrical Machines – Part 18: Functional Evaluation of Insulation Systems – Section 31: Test Procedures for Form-wound Windings – Thermal Evaluation and Classification of Insulation Systems Used in Machines up to and Including 50 MVA and 15 kV Amendment 1 (1996) IEC 60038: 1983 IEC Standard Voltages Amendment 1 (1994) Amendment 2 (1997) IEC 60050-(151): 2001 International Electrotechnical Vocabulary (IEV) – Part 151: Electrical and Magnetic Devices IEC 60050-(441): 1984 International Electrotechnical Vocabulary (IEV) – Chapter 441: Switchgear, Controlgear and Fuses - Amendment 1 (2000) IEC 60050-(551): 1998 International Electrotechnical Vocabulary (IEV) – Part 551: Power Electronics IEC 60050-(601): 1985 International Electrotechnical Vocabulary (IEV) – Chapter 601: Generation, Transmission and Distribution of Electricity – General Amendment 1 (1998) IEC 60076-1: 2000 Power Transformers – Part 1: General IEC 60076-3: 2000 Power Transformers – Part 3: Insulation Levels, Dielectric Tests and External Clearances in Air IEC 60076-5: 2000 Power Transformers – Part 5: Ability to Withstand Short Circuit IEC 60146-1-1: 1991 Semiconductor Convertors – General Requirements and Line Commutated Convertors – Part 1-1: Specifications of Basic Requirements - Amendment 1 (1996) IEC 60146-2: 1999 Semiconductor Converters – Part 2: Self-commutated Semi-conductor Converters Including Direct d.c. Converters IEC 60204-11: 2000 Safety of Machinery – Electrical Equipment of Machines – Part 11: Requirements for HV Equipment for Voltages above 1000 V a.c. or 1500 V d.c. and Not Exceeding 36 kV IEC 60417 (all parts) Graphical Symbols for Use on Equipment IEC 60529: 1989 Degrees of Protection Provided by Enclosures (IP Code) Amendment 1 (1999) IEC 60664-1: 2000 Insulation Coordination for Equipment within Low-voltage Systems – Part 1: Principles, Requirements and Tests IEC 60721-3-1: 1997 Classification of Environmental Conditions – Part 3: Classification of Groups of Environmental Parameters and Their Severities – Storage IEC 60721-3-2: 1997 Classification of Environmental Conditions – Part 3: Classification of Groups of Environmental Parameters and Their Severities – Transportation IEC 60721-3-3: 1994 Classification of Environmental Conditions – Part 3: Classification of Groups of Environmental Parameters and Their Severities – Stationary Use at Weather Protected Locations Amendment 1 (1995) Amendment 2 (1996) IEC 60726: 1982 Dry Type Power Transformers - Amendment 1 (1986) ISO 1680: 1999 Acoustics – Test Code for the Measurement of Airborne Noise Emitted by Rotating Electrical Machines 3 Definitions For the purposes of this part, the following definitions, and the definitions given in GB/T 2900.61, IEC 60050 (151), GB/T 2900.56, IEC 60050 (441), IEC 60050 (551), IEC 60050 (601), GB/T 3859.1, GB/T 3859.2 and GB/T 3859.3 apply. 3.1 System 3.1.1 a.c. power drive system (PDS) with voltage above 1 kV (see figure 1) system consisting of: ——power equipment (possible harmonic filters, input transformer, converter section, possible output transformer, a.c. motor); ——control, protection and auxiliaries. 3.1.2 Point of coupling PCC, IPC, PC: these definitions are given in GB/T 18039.4: ——PCC is the point of common coupling on a public network; ——IPC is the in-plant point of coupling on a private network; ——PC is the point of coupling for either of these cases. 3.1.3 Harmonic filter Circuit designed to reduce the flow of harmonic currents into the associated power system. 3.1.4 Regeneration Process of converting the mechanical energy of the system to electrical energy and transferring it to the input supply. Note: During regeneration the motor is working as a generator and the ratings of the motor may be different. 3.1.5 PDS efficiency ηD The efficiency, ηD, of the drive system is the ratio of the power delivered by the motor shaft to the total power drawn from the input power supply feeding lines (see Figure 1 and Figure 25), and is usually expressed as a percentage Note: Auxiliaries and any needed excitation power are included in the power drawn from the input.

Contents of GB/T 12668.4-2006

Foreword i 1 Scope 2 Normative References 3 Definitions 4 Overview of Drive System Topologies 4.1 Topologies Classification 4.2 Converter Configuration 4.3 Motor Type 4.4 By-pass and Redundant Configurations 4.5 Regenerative and Dynamic Braking 5 Service Conditions 5.1 Installation and Operation 5.2 Transportation 5.3 Storage of Equipment 6 Ratings 6.1 Power Drive System (PDS) 6.2 Converter 6.3 Transformer 6.4 Motor 7 Control Performance Requirements 7.1 Steady State Performance 7.2 Dynamic Performance 7.3 Process Control Interface Performance 8 PDS Main Components 8.1 Responsibilities 8.2 Transformer 8.3 Converter and Associated Controls 8.4 Motor 9 PDS Integration Requirements 9.1 General Conditions 9.2 Integration of Components with Voltages Above 1,000 V 9.3 Protection Interface 9.4 Driven Equipment Interface 10 Tests 10.1 Performance of Tests 10.2 Items of Individual PDS Component Tests 10.3 Drive System Tests 11 Efficiency Determination 11.1 General Requirements 11.2 Segregated Loss Method 11.3 Full Load System Test Appendix A (Informative) Most Commonly Used Drive System Topologies Appendix B (Informative) Speed Control Performance and the Mechanical System Appendix C (Informative) Power Semiconductor Losses