GB/T 20996.3-2020Performance of high-voltage direct current (HVDC) systems with line-commutated converters - Part 3: Dynamic conditions (English PDF)

Foreword

GB/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 3 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 20996:3-2007 "Performance of High-Voltage DC System Part 3: Dynamics", and is in line with GB /Z 20996:3-2007

Compared with:2007, the main technical changes except for editorial changes are as follows:

---Modified the scope (see Chapter 1, Chapter 1 of the:2007 edition);

---Modified the normative reference documents (see Chapter 2, Chapter 2 of the:2007 edition);

---The provision of "frequency control with zero power setting" has been added (see 4:3);

---Modified the expression of "commutation impedance" in the active power/reactive power related factors of HVDC converter (see 5:2:2,:2007

Year 5:2:1);

---Added the requirement to install equipment to meet the reactive power demand under steady-state conditions (see 5:2:5);

--- Added "Voltage Characteristics of Static Synchronous Compensation Device (STATCOM)" and related content (see 5:2:7);

---Added the expression of static synchronous compensation device suppressing transient voltage changes (see 5:4:2);

---Added the description of the shortcomings of the synchronized camera (see 5:4:3);

---Added "HV DC converter, reactive power source that can be switched on and off and static synchronous compensation device" and related content (see 5:4:4);

---Added the relevant regulations for limiting power reversal of the high-voltage DC system at both ends of the power cable (see 6:2:2);

---Added the expression of real-time simulation device for control system verification (see 6:6);

---The external conditions for the dynamic performance design of high-voltage DC systems at higher frequencies need to be considered "impedance frequency characteristics, including parallel power

The change in the number of containers and the possibility of islands formed by near-zone generators (isolated from the AC main network): "(See 7:3);

---Added the importance of real-time simulation device and test requirements (see 7:6);

---Modified the natural frequency of torsional vibration (see 8:1, 8:1 in:2007 edition);

---Added the expression of subsynchronous torsional vibration (see 8:1);

--- "SSR" is changed to "SSTI" (see 8:2, 8:2 in:2007 edition);

---Added the content that needs further research when UIF is greater than 0:1 (see 8:3);

---Modified the expression of the interaction coefficient of the generator set (see 8:3, 8:3 in the:2007 edition);

--- Deleted "Therefore, for each turbine generator set with potential torsional vibration instability, there should be sub-synchronous resonance (SSR) protection

Relay: "(See 8:4 in:2007 edition);

---Added the relevant regulations for the control and protection of turbine generators in the HVDC transmission system with subsynchronous damping controllers (see

8:6);

---Added the description of the DC restart sequence (see 9:2:6);

---The "DC reactor" in the full text is modified to "smoothing reactor":

The translation method used in this part is equivalent to the IEC TR60919-3:2016 "Performance of HVDC System Using Grid Commutation Converter"

Performance Part 3: Dynamics:

The Chinese documents that have a consistent correspondence with the international documents cited in this section are as follows:

---GB/T 3859:1-2013 General requirements for semiconductor converters and power grid commutated converters Part 1-1: Basic requirements

Fan (IEC 60146-1-1:2009, MOD);

---GB/T 3859:2-2013 General requirements for semiconductor converters and power grid commutated converters Part 1-2: Application guidelines

(IEC /T R60146-1-2:2011,MOD);

---GB/T 3859:3-2013 General requirements for semiconductor converters and power grid commutated converters Part 1-3: Transformers and electricity

Reactor (IEC 60146-1-3:1991, MOD);

---GB/T 20996:1-2020 Performance of HVDC systems using grid-commutated converters Part 1: Steady state

(IEC TR60919-1:2020, IDT);

---GB/T 20996:2-2020 Performance of HVDC systems using grid-commutated converters Part 2: Faults and operations

(IEC TR60919-2:2020, IDT):

This section also made the following editorial changes:

---According to IEC TR60919-1:2010, the "Figure 16" in the text is revised to "Figure 18" (see 5:2:2);

---Added the description of the text symbol of the rated power of the i-th generator set in the generator set interaction coefficient expression

(See 8:3):

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 Xidian Power System Co:, Ltd:, Global Energy Internet Research Institute Co:, Ltd:, State Grid Economic Technology

Research Institute Co:, Ltd:, China Southern Power Grid Co:, Ltd: EHV Transmission Company, Nanjing Nanrui Relay Electric Co:, Ltd:, Xu Ji Electric

Co:, Ltd:, Xi'an Power Electronics Technology Research Institute, Xi'an Duanyi Technology Co:, Ltd:

1 Scope

This part of GB/T 20996 gives comprehensive guidelines for the dynamic performance of HVDC systems: The dynamic performance in this section refers to its characteristic

The characteristic frequency or time zone covers events and phenomena ranging from transient conditions to steady-state conditions: The dynamic performance involved should belong to the steady state

Or under transient conditions, the high-voltage DC system at both ends and the connected AC system or its components, such as power plants, AC lines and buses, reactive power sources, etc:

The mutual influence between: It is assumed that the high-voltage DC system at both ends adopts a 12-pulse converter unit composed of three-phase bridge wiring (dual circuit),

It has two-way power transmission capability, and the converter uses a thyristor valve with gapless metal oxide arrester for insulation coordination as the bridge arm:

Diode converter valves are not considered in this section: Although there is no special mention for the multi-terminal HVDC transmission system, many contents in this section are also

Suitable for multi-terminal systems:

This section only involves power grid commutated converters, including converters with capacitor commutated circuit structures: IEC 60146-1-1, IEC TR60146-1-2

And IEC 60146-1-31) gives the general requirements for power grid commutated semiconductor converters, excluding voltage source converters:

1) IEC 60146-1-3 has been abolished and is covered by IEC 61378 series and IEC /IEEE60076-57-129:

2) The currently valid version IEC TR60919-1:2020:

GB/T 20996 consists of three parts: The first part is steady state, the second part is transient, and the third part is dynamic: When the user compiles both ends

In the specification of HVDC systems, all three parts should be considered:

For each component in the system, pay attention to the difference between system performance specifications and equipment design specifications: This part does not specify equipment regulations

Fan and test requirements, but focus on those technical requirements that affect system performance specifications: Different HVDC systems may have many differences

Similarities, this section does not discuss this in detail: This part should not be used directly as the technical specifications for specific engineering projects: However, this can be the basis

The basis is the preparation of technical specifications for the specific transmission system to meet the actual system requirements: The content involved in this section does not distinguish between users and manufacturers

Define job responsibilities:

2 Normative references

The 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 60146-1-1 General requirements for semiconductor converters and grid-commutated converters Part 1-1: Basic requirements specification (Semi-

conductorconverters-Generalrequirementsandlinecommutatedconverters-Part 1-1:Specification

ofbasicrequirements)

IEC /T R60146-1-2 General requirements for semiconductor converters and grid-commutated converters Part 1-2: Application guidelines (Semi-

conductorconverters-Generalrequirementsandlinecommutatedconverters-Part 1-2:Application

guidelines)

IEC 60146-1-3 General requirements for semiconductor converters and grid-commutated converters Part 1-3: Transformers and reactors

(Semiconductorconverters-Generalrequirementsandlinecommutatedconverters-Part 1-3:Trans-

formersandreactors)

IEC TR60919-1:20102) Performance of HVDC systems using grid-commutated converters Part 1: Steady state (Per-

formanceofhigh-voltagedirectcurrent(HVDC)systemswithline-commutatedconverters-Part 1: