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Delivery: <= 6 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 20996.1-2020: Performance of high-voltage direct current (HVDC) systems with line-commutated converters - Part 1: Steady-state conditions Status: Valid
Basic dataStandard ID: GB/T 20996.1-2020 (GB/T20996.1-2020)Description (Translated English): Performance of high-voltage direct current (HVDC) systems with line-commutated converters - Part 1: Steady-state conditions Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: K46 Classification of International Standard: 29.200; 29.240.99 Word Count Estimation: 74,797 Date of Issue: 2020-12-14 Date of Implementation: 2021-07-01 Older Standard (superseded by this standard): GB/Z 20996.1-2007 Regulation (derived from): National Standard Announcement No. 28 of 2020 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 20996.1-2020: Performance of high-voltage direct current (HVDC) systems with line-commutated converters - Part 1: Steady-state conditions---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. (Performance of HVDC systems using grid-commutated converters Part 1: Steady state) ICS 29:200;29:240:99 K46 National Standards of People's Republic of China Replace GB /Z 20996:1-2007 Using grid commutated converter Performance of HVDC System Part 1: Steady State (IEC TR60919-1:2020, IDT) 2020-12-14 release 2021-07-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee Table of contentsPreface Ⅴ Introduction Ⅷ 1 Scope 1 2 Normative references 1 3 Terms and definitions 2 4 Types of HVDC systems 2 4:1 Overview 2 4:2 Back-to-back HVDC system 2 4:3 Single-maximum loop HVDC system 2 4:4 Unipolar metal loop HVDC system 5 4:5 Double-maximum ground loop HVDC system 5 4:6 Bipolar metal loop HVDC system 8 4:7 Two 12-pulse (moving) inverters per pole 8 4:8 Arrangement of converter transformer 10 4:9 Wiring mode of DC switchyard 11 4:10 HVDC system with series capacitance compensation 13 4:11 LCC/VSC hybrid bipolar system 15 5 Environmental information 16 6 Rated power, rated current and rated voltage 18 6:1 Rated power 18 6:2 Rated current 19 6:3 Rated voltage 19 7 Overload and equipment capacity 19 7:1 Overload 19 7:2 Equipment capacity 20 8 Minimum transmission power and no-load standby state 21 8:1 Overview 21 8:2 Minimum current 21 8:3 Reduce DC voltage operation 22 8:4 No-load standby state 22 9 AC system 23 9:1 Overview 23 9:2 AC voltage 23 9:3 Frequency 24 9:4 System power frequency impedance 24 9:5 System harmonic impedance 24 9:6 Positive sequence and zero sequence impedance 25 9:7 Other harmonic sources 25 9:8 Subsynchronous Resonance (SSTI) 25 10 Reactive power 25 10:1 Overview 25 10:2 Conventional HVDC System 25 10:3 HVDC design for series capacitance compensation 26 10:4 Reactive power consumed by the inverter 26 10:5 Reactive power balance with AC system 27 10:6 Reactive power source 27 10:7 The maximum capacity of the reactive power group that can be switched on 27 11 HVDC transmission lines, grounding electrode lines and grounding electrodes 27 11:1 Overview 27 11:2 Overhead lines 28 11:3 Cable route 28 11:4 Ground electrode circuit 29 11:5 Grounding pole 29 12 Reliability 29 12:1 Overview 29 12:2 Out of service 29 12:3 Capacity 30 12:4 Terminology of Outage Time 30 12:5 Energy Unavailability Rate (EU) 31 12:6 Energy Availability (EA) 31 12:7 Maximum allowable number of forced outages 32 12:8 Outage probability 32 13 HVDC control 32 13:1 Control purpose 32 13:2 Control structure 32 13:3 Control command setting 36 13:4 Current limit value 37 13:5 Control loop redundancy 37 13:6 Protection system 37 13:7 Measurement 37 14 Telecontrol communication 38 14:1 Types of communication systems 38 14:2 Telephone 38 14:3 Power Line Carrier (PLC) 38 14:4 Microwave 38 14:5 Radio system 39 14:6 Optical fiber communication 39 14:7 Classification of transmitted data 39 14:8 Responsive Communication 40 14:9 Reliability 40 15 Auxiliary power supply 40 15:1 Overview 40 15:2 Reliability and load classification 40 15:3 AC auxiliary power supply 41 15:4 Storage battery and uninterruptible power supply (UPS) 41 15:5 Emergency power supply 42 16 Audible noise 42 16:1 Overview 42 16:2 Public nuisance 42 16:3 Noise in the work area 43 17 AC side harmonic interference 43 17:1 Generation of AC side harmonics 43 17:2 Filter 44 17:3 Harmonic interference criterion 46 17:4 Harmonic interference level 47 17:5 Filter performance 47 18 DC side harmonic interference 48 18:1 DC side interference 48 18:2 DC filter performance 49 18:3 Specification requirements 50 19 Power line carrier (PLC) interference 52 19:1 Overview 52 19:2 Performance Specifications 52 20 Radio frequency interference 53 20:1 Overview 53 20:2 Radio frequency interference from HVDC systems 53 20:3 Radio frequency interference performance specification 54 21 Power loss 56 21:1 Overview 56 21:2 Main sources of loss 56 22 Preparations for HVDC system expansion 57 22:1 Overview 57 22:2 Specifications for expansion 57 Appendix A (informative appendix) Factors affecting the reliability and availability of converter stations 59 Reference 65ForewordGB/T 20996 "Performance of HVDC System Using Grid Commutation Converter" is divided into 3 parts: --- Part 1: Steady state; --- Part 2: Failure and operation; --- Part 3: Dynamics: This part is Part 1 of GB/T 20996: This section was drafted in accordance with the rules given in GB/T 1:1-2009: This part replaces GB /Z 20996:1-2007 "Performance of High Voltage Direct Current System Part 1: Steady State", and is compatible with GB /Z 20996:1-2007 The main technical changes compared to:2007 are as follows: ---Change the "General Provisions" and "Overview of HVDC System Steady-State Performance Specifications" to "Scope" and "Normative Reference Documents" (see Chapter 1, Chapter 2, Chapter 1 and Chapter 2 of the:2007 edition); --- "Scope" has been added "This part only includes power grid commutated converters, including converters with capacitor commutated circuit structure:" Grid commutation semiconductance of voltage source converters given in IEC 60146-1-1, IEC TR60146-1-2 and IEC 60146-1-3 General requirements of the inverter: "(See Chapter 1); --- Added "Terms and Definitions" (see Chapter 3); ---Added the use of single-pole metal loop HVDC system and the expression of the influence of fault current on nearby substation transformers (See 4:4); ---Added the regulations on the wiring mode of fixed bipolar high voltage DC system, and revised Figure 8 (see 4:5); ---Added the expression about the influence of fault current in the bipolar metal loop HVDC system on the transformers of nearby substations (see 4:6); ---Modified the regulations of two 12-pulse (moving) inverters per pole, and added Figure 10 and Figure 11 (see 4:7,:2007 edition 3:7); ---Added the table about DC switch, smoothing reactor and converter transformer with third winding in "Arrangement of converter transformer" Described (see 4:8); ---Added the provisions of "Series Capacitor Compensated High Voltage DC System" and "LCC/VSC Hybrid Bipolar System" (see 4:10, 4:11); --- Change the suspended paragraphs in 5:1, 6:2, 7:4, 11:2, 11:5, 12:2, 15:2, 20:2 of the:2007 edition to "Overview", and the following paragraphs Serial number extension (see 6:1, 7:2, 8:4, 12:2, 12:5, 13:2, 16:2, 21:2, 5:1, 6:2, 7:4, 11:2, 11:5, 12:2, 15:2, 20:2); ---Added the description of the relationship between reactive power and overload in "overload" (see 7:1 paragraph 5); --- Modify the "effective value" to "root mean square value" [see 9:2:1, formula (9), formula (14), 18:2:3 and 18:3:4, 8:2:1 of the:2007 edition 16:3, 17:2:3 and 17:3:4]; ---Increase the "short-term voltage change range" and "voltage change in emergency" in the AC steady-state voltage range (see 9:2:2:2 and 9:2:2:3); --- Added "HVDC design for series capacitance compensation" and related content (see 10:3); --- Modify the frequency "to 100kHz" to "to the 49th harmonic of the fundamental frequency" [see 1) and 3) of 11:2:2,:2007 edition 10:2:2) a), c)]; ---Modified the "Overview" of "Reliability" (see 12:1, 11:1 of the:2007 edition); ---Modified the provisions on "out of service" in "reliability" (see 12:2, 11:2 of:2007 edition); ---Added "capacity" and related content (see 12:3); --- Added "Terms of Outage Time", and included "cycle hours" into this article (see 12:4,:2007 edition 11:3); --- Delete the "basic power level" related content (see 11:4 of the:2007 edition); ---Modified the calculation formula in "energy unavailability rate" (see 12:5, 11:5 in:2007 edition); ---Modified the explanation of the control structure of the HVDC system, and revised Figure 20 (see 13:2:1,:2007 edition 12:2 and Figure 16); ---Modified the functional requirements of "Inverter trigger control" (see 13:2:2, 12:2:1 of the:2007 edition); ---Added the description of the basic control function of "Pole Control" and Figure 21c) and related content (see 13:2:3, 12:2:3 of the:2007 edition And Figure 17); ---Added the "protection system" of the HVDC system (see 13:6); ---Modified the content of "Microwave" (see 14:4, 13:4 of:2007 edition); --- Modify the "DC reactor" in the full text to "Smoothing reactor", and add a description in Figure 1 to Figure 26; ---Added the description of the requirements and characteristics of the optical fiber communication system of the converter station (see 14:6); --- Added the content of signal transmission format (see 14:7); ---Added "e) HVDC transmission line protection; f) Power system safety control:" and "The performance requirements of the communication system will depend on Specific requirements for high-voltage DC control systems, remote control facilities, etc: Because of these different HVDC transmission schemes There is a big difference between them, and the communication system specifications should be determined through detailed analysis of the specific HVDC transmission system: "(see 14:8); ---Added the expression of combining multiple communication channels (see 14:9); ---Added the content that the battery pack needs to consider and stipulate "temperature conditions" and "ventilation requirements", and deleted the uninterruptible power supply requirements The content of voltage tolerance (see 15:4, 14:4 in:2007 edition); ---Added the design and installation of noise reduction devices for dry smoothing reactors (see 16:2:4); ---Modified the content of "AC filter reactor" (see 16:2:5, 15:2:4 of the:2007 edition); ---Added the example diagram of "AC harmonic filter connected to AC feeder of bipolar high voltage DC system" (see Figure 22,:2007 edition Figure 18); ---Added the description of the reasons and characteristics of the active filter and the circuit diagrams of different types of filters (see 17:2 and Figure 23, 16:2 and Figure 19 of the:2007 edition); ---Added the relevant content of the DC line path selection in the "DC filter" (see 18:1:7); ---Modified the harmonic interference current calculation formula (see 18:3:4, 17:3:4 in:2007 edition); ---Modified "noise" in power line carrier interference and radio frequency interference to "interference" (see Chapter 19, Chapter 20,:2007 edition Chapter 18 and Chapter 19); ---Added "It should be considered that the cost of a wideband PLC filter is significantly higher than that of a narrowband PLC filter: In particular, 20kHz~ The cost of the 50kHz lower frequency filter is significantly higher than the higher frequency PLC filter: "(See 19:2); ---Added the "Overview" of "Radio Frequency Interference" as an article (see 20:1); ---Added AC corona and DC corona influencing factor analysis of AC high voltage switchyard of converter station (see 20:2:1); ---Modified the content of "radio interference propagation" (see 20:2:2, 19:1:2 of the:2007 edition); --- Added "RFI features" and related content (see 20:2:3); ---Modified the content of "Radio Frequency Interference Performance Specification" (see 20:3, 19:2 in:2007 edition); --- Deleted part of the illustration of "HVDC system expansion method" (see Figure 26, Figure 21 of the:2007 edition); ---Added Appendix A and references: The translation method used in this part is equivalent to the adoption of IEC TR60919-1:2020 ``Performance of High Voltage DC Systems Using Grid Commutation Converters'' Energy Part 1: Steady State: The Chinese documents that have a consistent correspondence with the international documents cited in this section are as follows: ---GB/T 13498 Terminology for High Voltage Direct Current Transmission (GB/T 13498-2017, IEC 60633:2015, MOD) This part was proposed by China Electrical Equipment Industry Association: This part is under the jurisdiction of the National Power Electronic System and Equipment Standardization Technical Committee (SAC/TC60): Drafting organizations of this section: China Electric Power Research Institute Co:, Ltd:, China Southern Power Grid Research Institute Co:, Ltd:, Xi'an High Voltage Research Institute Co:, Ltd:, Xi’an Power Electronics Technology Research Institute, Tsinghua University, Global Energy Internet Research Institute Co:, Ltd:, Xi’an West Electric Power System Co:, Ltd:, Nanjing Nanrui Relay Electric Co:, Ltd:, State Grid Economic and Technical Research Institute Co:, Ltd:, China Southern Power Grid Co:, Ltd: Responsible company EHV Transmission Company, Xu Ji Electric Co:, Ltd:, Xi'an Duanyi Technology Co:, Ltd:, Pinggao Group Co:, Ltd: The main drafters of this section: Xie Guoping, Qiu Wei, Zhou Huigao, Wei Hongqi, Liu Lin, Yu Zhanqing, Fu Chuang, Yang Xiaohui, Wang Weiwei, Wang Gaoyong, Ren Junhui, Wang Mingxin, Zhao Biao, Han Congda, Wang Junsheng, Li Yanan, Yan Xilin, Wang Yongping, Li Jingliang, Shen Xiaolin, Li Yuan, Hong Bo, Wu Zhanfeng, Wang Xiangke, Gao Zijian, Xu Weihua, Dong Tianhua, Zhu Yiying: The previous versions of the standards replaced by this part are as follows: ---GB /Z 20996:1-2007:IntroductionBe aware of the difference between the system performance specifications and the equipment design specifications of the individual components in the system: Usually, for a specific project The performance specifications of the two HVDC converter stations in China are compiled as a whole: Some parts of the HVDC system can also be specified and adopted separately In this case, fully consider the coordination of each part with the performance goals of the entire HVDC system, and clearly stipulate that each part and the system between interface: The typical parts that are easier to divide and clarify the interface are: a) DC transmission lines, grounding electrode lines and grounding electrodes; b) Long-distance communication system; c) Valve hall, foundation and other civil works; d) Reactive power sources, including AC shunt capacitor banks, shunt reactors, synchronous and static reactive power compensation devices; e) AC switchgear; f) DC switchgear; g) auxiliary system; h) AC filter; i) DC filter; j) Smoothing reactor; k) Converter transformer; l) Lightning arrester; m) Series commutating capacitor; n) Converter valve and its auxiliary equipment; o) Control and protection system: Note: The last four items are difficult to separate: In fact, it is not advisable to separate these four items: Chapters 4~22 of this part comprehensively discuss the steady-state performance of HVDC systems: Since the equipment is usually specified and purchased separately, taking into account the impact on the performance of the HVDC system, this section only covers HVDC transmission: Electrical wiring, grounding electrode wiring and grounding electrode (see Chapter 11): This section assumes that the HVDC converter station contains one or more converter units installed in a single location and their supporting buildings, electricity Reactor, filter, reactive power source, control, protection, monitoring, measurement and auxiliary equipment: This section does not discuss AC switchgear, but includes AC filters and reactive power sources, although they can be connected to the AC bus independent of the HVDC converter station (see Chapter 17): Using grid commutated converter Performance of HVDC System Part 1: Steady State1 ScopeThis part of GB/T 20996 gives comprehensive guidelines for the steady-state performance of high-voltage DC systems, involving the use of three-phase bridge (dual-circuit) connections The steady-state performance of the two-terminal HVDC system that constitutes a 12-pulse (dynamic) converter unit (see Figure 1), but does not include the multi-terminal HVDC transmission system System: The converter stations at both ends consider the use of thyristor valves as semiconductor converter valves, which have two-way power transmission capabilities: Two poles are not considered in this section Pipe valve: Description: 1---The winding on the valve side of the transformer: Figure 1 12-pulse (dynamic) converter unit This section only covers power grid commutated converters, including converters with capacitor commutated circuit structures: In IEC 60146-1-1, IEC TR60146-1-2 and IEC 60146-1-31) give general aspects of grid-commutated semiconductor converters: This section does not consider voltage Source inverter: There is a difference between the system performance specifications and the equipment design specifications of the individual components in the system: This part does not specify equipment specifications and tests Requirements, also did not include detailed seismic performance requirements: In addition, different HVDC systems may have many differences: This section does not Consider these details: Therefore, this section should not be used directly as the technical specifications for specific engineering projects: However, it can be used as a specific The transmission system compiles technical specifications that meet the actual system requirements: This section covers steady-state performance, IEC TR60919-2 faults and operations, and IEC TR60919-3 dynamic performance: There are separate documents: Pieces: When compiling the specifications for the two-terminal HVDC system, the three parts are considered together:2 Normative referencesThe following documents are indispensable for the application of this document: For dated reference documents, only the dated version applies to this article Pieces: For undated references, the latest version (including all amendments) applies to this document: IEC 60633 High-voltage direct current (HVDC) transmission-Vocabulary] 1) IEC 60146-1-3 has been abolished and is covered by IEC 61378 series and IEC /IEEE60076-57-129: ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 20996.1-2020_English be delivered?Answer: Upon your order, we will start to translate GB/T 20996.1-2020_English as soon as possible, and keep you informed of the progress. 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