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NB/T 31003-2011

Chinese Standard: 'NB/T 31003-2011'
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BASIC DATA
Standard ID NB/T 31003-2011 (NB/T31003-2011)
Description (Translated English) Design regulations for large-sale wind power connecting to the system
Sector / Industry Energy Industry Standard (Recommended)
Classification of Chinese Standard F11
Classification of International Standard 27.180
Word Count Estimation 30,341
Date of Issue 2011-07-28
Date of Implementation 2011-11-01
Quoted Standard GB/T 12325-2008; GB 12326-2008; GB/T 14549; GB/T 15945-2008; GB/T 15543-2008; GB/T 20320-2006; DL 755-2001; DL/T 1040; SD 131 -1984; SD 325-1989; national electricity Regulatory Commission Order " secondary power system security requirements, " No. 5; national electricity Regulatory Commission electricity Regulatory security [ 2006 ] No. 34 " overall secondary power system security plan"
Drafting Organization China Power Engineering Consulting Group Corporation
Administrative Organization Wind energy industry Standardization Technical Committee
Regulation (derived from) ?National Energy Board 2011 No.4
Summary This standard applies to the following large-scale wind power projects: a planned capacity of more than 200MW of new wind farms and wind farms or group projects. 2. Directly or through a pooled connection voltage level of 220kV and above lines and power systems new or expanded wind farms.

NB/T 31003-2011
Design regulations for large-sale wind power connecting to the system
ICS 27.180
F 11
2011-07-28 released
2011-11-01 implementation
National Energy Board released
1 General
2 terms and definitions
3 power system to accept wind power capacity
Design of Wind Farm Access System
5 Wind farm technical regulations
Technical specification for wind turbine
Reference standard list 12
Article description
This standard is based on the "National Energy Board on the release of the second batch of energy in.2009
Domain industry standard system (repair) plan notice "(National Technology [2010] 14)
The arrangement of the preparation.
This standard and revised GB/Z.19963 "wind farm access power system technical regulations
Set "the common provisions of the wind farm and the relevant technical requirements, GB/Z.19963 provides
Wind power grid and the general technical requirements, this standard provides a large wind farm and the network
skills requirement.
This standard is proposed by the National Energy Board.
This standard by the energy industry standardization of wind power technical committee.
The main drafting unit of this standard. China Electric Power Engineering Consulting Group Corporation.
This standard participates in the drafting unit. China Electric Power Research Institute.
The main drafters of this standard. Xu Xiaodong, Song Xuankun, Zhang Lin, Guo Jia, Li Wei,
Li Binghan, Han Xiaoqi, Rao Jianye, Yu Xiaoping, Chi Yongning, Liu Chun, Shi Wenhui.
The opinions and suggestions of this standard in the course of implementation are fed back to the joint of China Electricity Enterprises
Will be standardized management center (Beijing Bai Guang Road on the 1st one, 100761).
1 General
1.0.1 To make the wind farm access to the power system design to better implement the national power construction
Policy, standard wind farm access to power systems, specially formulated this standard.
1.0.2 This standard applies to the following large wind power projects.
1 Planning of new wind farms or wind farm projects with a capacity of.200 MW or above.
2 directly or pooled through 220kV and above voltage level lines and power lines
Connected to the construction of new or expansion of wind farms.
1.0.3 Design of wind farms should comply with the requirements of this standard, but also in line with the current state
The relevant provisions of the standard.
2 terms and definitions
This standard uses the following definitions and terms.
2.0.1
Wind turbine generator system; WTGS
A system that converts wind kinetic energy into electrical energy.
2.0.2
Wind farm; wind power plant
By a group of wind turbines or wind turbine group (including unit unit transformer), pooled
Lines, the main boost transformer and other equipment consisting of power stations.
2.0.3
Effective capacity of wind power
According to the probability distribution of wind power, considering the system peaking and sending out the project,
So that the system to achieve the best technical and economic wind power output, the effective capacity of wind power.
2.0.4
Wind farm and point of interconnection of wind farm
Wind farm booster station High side bus or node.
2.0.5
Active power of wind farm
Wind farm input power to the grid.
2.0.6
Wind power reactive power of wind power
Wind farm input to the grid of reactive power.
2.0.7
Active power rate of change
The change between the maximum and the minimum values of the active power output of the wind farm in the unit time
Volume and installed capacity ratio.
2.0.8
Public connection point of common coupling
The first placement of the grid connection and the public grid connection.
2.0.9
Wind turbine low voltage through through the low voltage ride through the wind
When the power system failure or disturbance caused by the dot voltage drop, in a certain power
Pressure drop range and time interval, the wind turbine can ensure that no continuous operation.
3 power system to accept wind power capacity
3.0.1 Wind farm grid-connected design should be carried out, including the power system to accept wind power capacity of the specialized
Research.
3.0.2 Power system to accept wind power capacity research should take into account the energy resources, wind
Power output characteristics, power system load characteristics, power supply structure and FM pinning capability
The wind power effective capacity, the study of wind power consumption direction, put forward the power system acceptance
Wind power capacity and transmission programs, and wind power development scale and progress of the proposed.
3.0.3 Effective capacity of wind power should be to improve the power system to accept wind power capacity, improve wind power
Power generation accounted for the proportion of all the power generation as the goal, according to the wind power output characteristics, comprehensive ratio
Which is determined by factors such as power leveling ability and engineering economy.
Design of Wind Farm Access System
4.0.1 Wind farm access system to determine the voltage level, should consider the following factors.
1 wind farm planning capacity, transmission distance and transmission capacity and its in the system
The status and role.
2 simplify wiring.
3 Scheduling operation and the flexibility of accident handling.
4 to improve the stability of the role of power grid.
4.0.2 Wind farm transmission line should be selected according to the installed capacity of wind power. Wind farm group through
500kV C or 750kV) voltage level collection of the line, the wire cross-section selection
Should consider the effective capacity of wind power, determined by the technical and economic feasibility.
4.0.3 Wind farm booster substation capacity should be selected in accordance with wind power installed capacity. For the pass
Over 220kV C or 330kV) to boost to 500kV C or 750kV)
Access to the public grid of the wind farm group, the convergence of its convergence capacity should be considered wind power
Efficiency, determined by the technical and economic feasibility.
4.0.4 Wind farm and access to the public connection point configuration of the month capacity should be combined with the wind
Electric field actual access system, through the wind farm access system reactive research to confirm
Should be in accordance with the principles of hierarchical partition configuration, and should have a flexible reactive power adjustment
Ability and maintenance. The reactive configuration shall meet the following requirements.
1 When the public grid voltage is within the normal range, the wind farm should be able to control the grid
The point voltage deviation is within the range of -3% to + 7% of the rated voltage.
2 reactive power adjustment speed should be able to meet the needs of grid voltage regulation. When necessary, install
Dynamic reactive power compensation device.
4.0.5 Wind farm developers should provide wind turbines that can be used for power system simulation calculations
Group, wind farm control system models and parameters for wind farm access to power systems
Planning and design.
Technical requirements for wind farms
5.1 Wind farm active power
5.1.1 Wind farm should have active power adjustment capability, configuration active power control system
System, receive and automatically perform the power system dispatching department to send the active power control
signal.
5.1.2 Wind farm active power rate of change should be based on the power system FM capacity
And other power regulation characteristics.
5.1.3 In the case of insufficient system FM capacity, the active power of the wind farm can be reduced.
5.1.4 In the event of failure of the power system or special operation mode, if the wind farm is transported
Line of the safety and stability of the grid, the wind farm can be resolved. Accident processing is completed, power department
After returning to normal operation, the wind farm should be resumed as soon as possible.
5.2 Wind power active test
5.2.1 Wind farm should have active power prediction capability, can provide 0 ~ 72h short and as well
15min ~ 4h short-term wind power forecast, the predicted value of the time resolution of 15min.
5.3 Reactive power of wind farm
5.3.1 Wind farm should have reactive power control capability, configuration reactive power control system.
5.3.2 wind farm booster station should adopt the on-load tap changer, through the main transformer tap
Adjust the voltage inside the wind farm to ensure the normal operation of the wind turbine.
5.3.3 Wind farms should make full use of the reactive capacity of wind turbines and their ability to adjust the wind
If the reactive capacity of the motor group can not meet the requirements of the system voltage regulation, according to the wind farm
Into the system reactive power research, should be concentrated in the wind farm to meet the requirements of the reactive power compensation
Device.
5.4 Wind power quality
5.4.1 The flicker value of the common connection point accessed by the wind farm satisfies the GB 12326-
2008 "power quality voltage fluctuation and flicker", harmonic value to meet GB/T 14549 "electricity
Can be the quality of public power grid harmonic ", three-phase imbalance meet GB/T 15543-2008
"Power quality three-phase voltage imbalance" requirement, the wind farm should be able to run normally.
5.4.2 The voltage fluctuation d (%) caused by the wind farm at the access to the common connection point shall
Meet the requirements of Table 5.4.2.
Table 5.4.2 Voltage variation limits
Note. d that voltage changes for the voltage root mean square curve on the adjacent two extreme voltage difference, the system nominal voltage
, The r represents the frequency of the voltage change, the number of times the voltage fluctuation per unit time (voltage from large to
Small or small to large calculations → sub-change). Different times in a number of changes, such as the interval of less than 30ms, then
Count a change.
5.4.3 Flicker interference values for public connection points connected to wind farms shall meet GB 12326-
2008 "Power quality voltage fluctuation and flicker" requirements. Wind farm caused by public
The length of the flicker at the connection point is in accordance with the installed capacity of the wind farm and the dry point on the common connection point
The total capacity of the interference ratio of the distribution.
5.4.4 The harmonic injection current of the common connection point of the wind farm shall meet GB/T
1454 "Power quality utility grid harmonics". The wind farm is injected into the public connection point
The allowable value of the wave current is in accordance with the installed capacity of the wind farm and the harmonic point on the common connection point
The total capacity of the power supply equipment to allocate the ratio.
5.5 secondary part of wind farm
5.5.1 The secondary design of the wind farm shall meet the following requirements.
1 wind farm secondary equipment and systems should be consistent with the power of the secondary part of the technical specifications,
SECONDARY SECURITY PROTECTION REQUIREMENTS AND RELATED DESIGN PROCEDURES.
2 communication between the wind farm and the grid dispatching department, transmission channel and information
The transmission is regulated by the grid dispatching department, including telemetry, remote, remote, remote
Tone signals and other types of safety devices, to provide the signal and real-time
Requirements and so on.
5.5.2 Wind farms The signals provided to the grid dispatch department shall include, at a minimum, the following.
1 single or group of wind turbine operating status.
Number and model of actual operating units for wind farms.
Wind power and grid voltage.
4 wind farm high-voltage side of the active power, reactive power, current.
5 high voltage circuit breaker and disconnector position.
Wind speed and wind direction of wind farms.
5.5.3 Wind farm relay protection should meet the following requirements.
1 wind farm related relay protection, safety automatic device and secondary circuit
The installation should meet the requirements of the relevant provisions of the grid and anti-accident measures.
2 on the grid line, should be configured on the system side distance protection, there are special requirements,
It is also possible to configure the vertical current differential protection.
3 wind farms should be equipped with fault recorder equipment, the equipment should have sufficient record pass
And can meet the technical requirements of fault records. Fault recorder equipment should have access number
According to the transmission channel to the power grid dispatch department function.
5.5.4 Automation of wind farm dispatching should meet the following requirements.
1 wind farm should be equipped with a computer monitoring system (or remote terminal RTU), power
The amount of remote terminal equipment, secondary system security equipment, scheduling data network access set
And to meet the power system secondary system equipment technical requirements.
2 wind farm dispatching automation system telecontrol information collection range access grid dispatching
The amount of information required to access the system.
3 wind farm electric energy measurement point (gateway) should be located in the wind farm and the power grid of the property points
Boundary, property boundary by the relevant provisions of the state to determine the measurement device configuration should be according to the grid
NB/T 31003 a -.2011
Company 's power metering device technical management specification requirements.
4 wind farm scheduling automation, electric energy information transmission directly with the main/standby channel
Communication mode, direct delivery grid dispatch department.
5 wind farm dispatch equipment power supply should be used uninterruptible power supply device
CUPS) or the station DC power supply system. After the AC power supply disappears, UPS
Power supply load running time should be greater than 4 gamma nin.
6 wind farm should be configured with phase angle measurement unit CPMU).
7 wind farms should be used with the grid dispatch department unified GPS clock system.
8 wind farm secondary system safety protection should be consistent with the National Electricity Regulatory Commission phase
Off regulations.
5.5.5 Wind farm communication shall meet the following requirements.
1 wind farm access system should have two routing channels, which have at least one light
Cable channel.
2 Wind farm and power system directly connected to the communication equipment [such as optical fiber transmission
Backup, pulse code modulation terminal equipment (PCM), scheduling program-controlled switches, data communication network,
Communication monitoring equipment, etc.] need to be consistent with the system access device interface and protocol.
3 The communication equipment configuration in the wind farm shall be carried out in accordance with the relevant design procedures.
Technical specification for wind turbine
6.1 Active power control
6.1.1 Wind turbines shall have active power control capability to receive and automatically perform wind power
Field to send the active power control signal. When the wind turbine active power in the rated output
20% or more, it should have the ability to continuously adjust the active power smooth.
6.1.2 Wind turbines should have the ability to control both local and remote active power.
6.2 reactive power control
6.2.1 The wind turbine shall meet the power factor in the range of 0.95 to 0.95
Within the dynamic adjustable.
6.3 Frequency adjustment
6.3.1 grid frequency changes in the range of 49.5Hz ~ 50.5Hz, the wind turbine should be with
Have the ability to run continuously.
6.3.2 When the grid frequency is lower than 47.5Hz, the continuous operation capacity of the wind turbine is according to the wind
The motor group is allowed to run at the lowest frequency.
6.3.3 grid frequency changes in the range of 47.5Hz ~ 49.5Hz, the wind turbine should be with
Have the ability to run at least lOmin.
6.3.4 grid frequency changes in the range of 50.5Hz ~ 51Hz, the wind turbine should be with
Have the ability to run at least 2rnin.
6.4 Low voltage traversal
6.4.1 Wind turbines should have low voltage crossing capability. Low voltage crossing of wind turbine
The technical requirements for capability are shown in Figure 6.4.1.
Figure 6.4.1 Low voltage crossing requirements for wind turbines
Note z wind farm and network voltage in the figure above the voltage profile, the wind turbine should have no
Intermittent grid running capacity; and network voltage in the figure below the voltage profile, the wind
The electric wind turbine unit is allowed to cut out from the grid.
6.4.2 Wind turbines shall be capable of having a voltage drop to 20% of the rated voltage
Maintain the 625ms low-voltage traversing capability.
6.4.3 Wind farm The grid voltage can be restored to the rated power within 2 s after the fall occurs
When the pressure is 90%, the wind turbine should have the ability to run continuously.
6.4.4 Wind power units that have not been cut out during the fault of the power system should have active power
The ability to recover quickly after a fault is cleared, starting from the fault clearing time, at least
10% of the rated power per second power rate of return to the state before the failure.
Reference standard list
1. "Power quality supply voltage deviation" GB/T 12325-2008
2. "Power quality voltage fluctuation and flicker" GB 12326-2008
3. "Harmonics of power quality public power grid" GB/T 14549
4. "Power quality power system frequency deviation" GB/T 15945-2008
5. "Three-phase voltage imbalance in power quality" GB/T 15543-2008
6. "Wind turbine power quality measurement and evaluation methods" GB. Room 20320 a
7. "Power System Safety and Stability Guidelines" DL 755-2001
8. Power Grid Operation Guidelines DL/T 1040
9. Technical Guidelines for Power Systems SD 131-1984
10. "Power System Voltage and Reactive Power Technical Guide" SD 325-1989
11. National Electricity Regulatory Commission Order No. 5 "Electric power secondary system safety protection regulations"
12. State Electricity Regulatory Commission Electric Safety (2006) No. 34 "Electricity twice
System security protection overall program "
For dated references, dated only dates apply to this standard. Where
Is the reference to the date of the document, the latest version (including all the amendments) applies to this standard.
Directory
2 Terms and Definitions
3 Power system capacity to accept wind power.19
Design of Wind Farm Access System
5 Wind farm technical regulations
Technical regulations for wind turbines
NB IT 31003-.2011
2 terms and definitions
2.0.3 This specification sets forth the concept of wind power effective capacity.
Due to the randomness and uncertainty of wind power, both by wake effects and wind farms
Terrain and other factors, the wind farm output is greater than the rated capacity of 50% of the probability of not
high. Due to the different wind energy characteristics, the regional differences in wind power output is also great.
Such as.
1 Zhangjiakou area wind farm (300MW) output capacity in the region wind power installed capacity
The probability of 75% or less is 95% (see Figure 1).
2 Northeast Power Grid (2900MW) wind power output below 40% installed capacity
The probability reached 95% (see Figure 2).
3 Inner Mongolia C2400MW) Wind power output in 60% of the installed capacity of the following general
The rate reached 95% (see Figure 3).
For the above statistics of the wind farm, the wind power output was a certain probability distribution,
The probability of exceeding a given value may be small, the wider the distribution of the calculated wind farm,
The more the number and the installed capacity, the more the given value is, the more the wind farm is
The smaller the number and the smaller the installed capacity, the higher the given value.
a) Zhangjiakou wind farm output probability distribution map b) Zhangjiakou wind farm output from small to large cumulative probability map
Figure 1 Zhangjiakou wind farm output probability map
In this technical specification, the concept of wind power effective capacity is introduced, which is mainly used for wind power transmission
Out of engineering equipment selection and grid acceptance of wind power capacity calculation of two aspects. for wind power delivery
When the engineering equipment is selected, the effective capacity should be based on the cumulative probability of wind output in the whole period
Determine. for the grid to accept wind power capacity calculation, the effective capacity should be based on low load
Time to calculate the cumulative probability of wind power output, the technical specifications recommended 95% to 99% of the temporary
Probability selection range. Engineering applications need to be specific technical and economic comparison, to determine the system
The probability of the value, and then get the effective capacity of wind power.
In the following, a grid and a wind farm as an example, given the effective calculation of wind power capacity
Thinking.
Related standard:   NB/T 31004-2011  NB/T 31005-2011
Related PDF sample:   NB/T 31004-2011  NB/T 31006-2011
   
 
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