CN105914798B - A kind of wind power plant idle work optimization progress control method based on the whole network while discontinuity surface - Google Patents
A kind of wind power plant idle work optimization progress control method based on the whole network while discontinuity surface Download PDFInfo
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Abstract
The present invention is based on electric system WAMS same time section measurement information technology, Wind turbines and reactive power compensator idle work optimization progress control method in a kind of wind power plant are disclosed.Main contents include: that this method obtains the substation wind power plant PMU data in real time, guarantee that grid entry point voltage acquired in the substation wind power plant AVC, reactive power and AVC main website keep same time section, fully consider Wind turbines, the operation constraint condition of reactive power compensator and the influence of environmental factor, by the coordination between Wind turbines and between Wind turbines and reactive power compensator, main website is cooperated to realize that wind farm grid-connected reactive voltage is simultaneously and rapidly adjusted.
Description
Technical field
The invention belongs to electric system technical field of wind power generation, and in particular to during wind farm grid-connected control and regulation,
It fully considers the whole network operating condition, to wind power plant reactive voltage control speed and accuracy rate is improved, proposes a kind of based on WAMS number
According to wind power plant idle work optimization run control strategy.
Background technique
With the development of China's wind power technology and the attention to development and utilization renewable energy, wind-power electricity generation is in recent years at me
State has obtained faster development.It tentatively verifies China land and can develop and use the 79% of wind energy and be mainly distributed on three northern areas of China, can open
Sending out the wind resource utilized has 0.2TW.As wind-powered electricity generation installation working capacity quicklys increase and accounts for the continuous expansion of power supply ratio, wind
The grid-connected bring of electricity on the impact of system influence the big province of several wind-powered electricity generations such as Heilungkiang, Liaoning, Jilin, Inner Mongol, Gansu also
Start to show successively, and limits system to varying degrees and continue to access the ability of wind-powered electricity generation.
National energy office data shows that the first half of the year in 2015,17,500,000,000 kilowatt hour of wind-powered electricity generation abandonment electricity increases by 10,100,000,000 on year-on-year basis
Kilowatt hour；Average abandonment rate 15.2%.It is equivalent to and wastes 5,860,000 t standard coals, direct losses surpass 87.5 hundred million yuan.13 planning
It is expected that Chinese the year two thousand twenty installed capacity of wind-driven power is up to 200,000,000 kW, wind-abandoning phenomenon grows in intensity, will be to Wind Power In China industry development band
It seriously affects, Chinese energy-saving and emission-reduction effort will also have a greatly reduced quality.Good control and scheduling are realized to wind-power electricity generation, it will be advantageous
In wind electricity digestion.
Voltage & var control be wind-power electricity generation control important link, in control process, if data it is not homologous or by
Making data in reasons such as communication cycles, there are the time differences, can generate very big negative effect to control effect.The present invention is based on WAMS
Data propose a kind of wind power plant idle work optimization progress control method based on the whole network while discontinuity surface, are guaranteeing that the data of same source is same
When discontinuity surface on the basis of, unified coordination and administration and control are carried out to wind power plant inside reactive source, improve the control of wind power plant voltage power-less
The response speed of precision processed and power grid to wind power plant reactive requirement.
Summary of the invention
To solve the problems, such as the data of same source and data time difference during wind power plant voltage & var control, the invention proposes one
Wind power plant idle work optimization progress control method of the kind based on the whole network while discontinuity surface.
A kind of wind power plant idle work optimization progress control method based on the whole network while discontinuity surface of the invention, content include:
1) substation AVC master controller receives clockwork clock synchronization signal by way of B code, when guaranteeing with the operation of AVC main website
Mark is unified；
2) abundant according to the reactive power for surveying wind data and aerogenerator unit safe reactive power data calculating Wind turbines in real time
Degree and OPTIMAL REACTIVE POWER power, and safety factor is set, judge that Wind turbines maximum can send out reactive power；
3) according to reactive power compensator operating status and operation data, the reactive power for calculating reactive power compensator in real time is abundant
Degree；
4) wind farm grid-connected voltage, reactive power operation data are obtained by the substation PMU, introduce delay correction factor,
Calculate boss's station wind farm grid-connected reactive power demand of same time section and wind power plant reactive power optimal control；
5) reactive power compensator of fast response time first acts, and needs in minimum time scale response grid entry point reactive power
It asks；
6) reactive power distribution is carried out to the Wind turbines of operation using similar Margin Method, and replace reactive power compensator without
Function power margin；
7) operating parameter of Wind turbines is standardized, is suitable for different types of wind power generating set.
As a further improvement of the present invention, excellent to running Wind turbines progress reactive power using similar Margin Method
Change, mainly according to the operating status of Wind turbines, unit, hair reactive power and OPTIMAL REACTIVE POWER power ratio are big in fact for similar Margin Method
Small, every unit can provide maximum reactive power and carry out wattles power economic equivalent distribution to the Wind turbines of operation；
Reactive power and OPTIMAL REACTIVE POWER power ratio size, every machine are sent out in fact according to the operating status of Wind turbines, unit
Group can provide maximum reactive power and carry out wattles power economic equivalent control to Wind turbines, fully consider various aerogenerator unit safes
The reactive power upper limit, the big Wind turbines of reactive power nargin preferentially carry out idle power output, failure but can run Wind turbines, face
The idle power output of nearly reactive power upper limit unit flexible control guarantees that grid entry point voltage is optimal, while realizing to Wind turbines
Defense controls.
Qout=k1X(k2(Qall/Qopt)+k3Qmax)
Qout--- -- indicates the instruction of Wind turbines reactive power；
X --- -- indicates running of wind generating set state；
Qall--- -- indicates Wind turbines hair reactive power in fact；
QoptThe OPTIMAL REACTIVE POWER power of --- -- expression Wind turbines；
Qmax--- --- indicates the safe reactive power of maximum of Wind turbines；
k1、k2、k3-- it indicates the weight coefficient of items, artificial setting or automatic calculating can be switched.
As a further improvement of the present invention, using with the whole network same time profile data, cooperate AVC main website realize station
AVC control function is held, Wind turbines interactive information does not have clock synchronization and markers at present, introduces delay correction factor, sufficiently weights
Information exchange spent time so that operational data is in same time section in wind power plant, and then optimizes whole audience reactive power；
Kt=k4Qt+ k5Qmo
Kt--- -- indicates Wind turbines delay correction factor；
Qt--- -- indicates the real hair reactive power before Wind turbines delay cycle；
Qmo--- -- indicates the real hair reactive power at Wind turbines current time；
k4、 k5-- it indicates the weight coefficient of items, artificial setting or automatic calculating can be switched.
As a further improvement of the present invention, the operating parameter of Wind turbines is standardized, by the setting of parameter, is adapted to
The operation characteristic of different type Wind turbines and idle power producing characteristics；Standardized parameter includes: that Wind turbines send out function idle in fact
The maximum safe reactive power of rate, running of wind generating set state, Wind turbines.
This method fully considers the homologous and same time section of data during wind power plant voltage & var control, Ji Jifeng
The operation constraint condition and environmental impact factor of motor group and reactive power compensator optimize the coordinated control of wind power plant reactive source,
Guarantee that grid entry point voltage is optimal.BROAD SUMMARY uses following technical scheme:
1, the standard parameter of Wind turbines
1) Wind turbines send out reactive power Q in factall: the reactive power that Wind turbines are actually sent out, including each moment send out nothing in fact
Function power；
2) running of wind generating set state X: Wind turbines difference operating status is directly affected to Wind turbines control instruction
Output, operating status include it is grid-connected, to wind, failure, maintenance, communication disruption；
3) the safe reactive power Q of maximum of Wind turbinesmax: current each producer's Wind turbines can be realized active reactive function
Rate decoupling, i.e., in the case of Wind turbines can issue active power (threshold wind velocity), idle power output and active power output are without direct
Relationship can achieve the certain proportion of rated power, but can not exceed this certain proportion, otherwise can be to Wind turbines correlation
Component, which adversely affects, even to be damaged；
4) the OPTIMAL REACTIVE POWER power Q of Wind turbinesopt: according to Load flow calculation inside running of wind generating set state and wind power plant
Power output that the every Wind turbines known are most preferably idle reduces reactive power flow inside wind power plant on the basis of guaranteeing grid entry point voltage；
5) Wind turbines reactive power instructs Qout: the reactive power instruction of final distribution to every Wind turbines.
2, idle control strategy algorithm
1) collect the operation information of electric line, reactive compensation circuit, various fortune from the substation wind power plant PMU acquisition grid entry point, respectively
Row information has time tag；Operation information, Wind turbines, reactive-load compensation equipment are obtained from Wind turbines, reactive-load compensation equipment
With time tag, Wind turbines, reactive-load compensation equipment do not have in the case of time adjustment function information in the case of having time adjustment function
Delay amendment is carried out to the operation information of acquisition according to delay correction factor.The grid entry point voltage instruction that AVC main website issues is received,
Instruction value has time tag.
2) the reactive power demand for calculating same time section wind power plant, in a variety of reactive sources (Wind turbines, reactive power
Compensation equipment) between carry out coordinated control, corresponding allocation strategy is taken according to the OPTIMAL REACTIVE POWER power capacity of reactive source；In wind
When effective reactive power off-capacity of electric field is to maintain grid entry point voltage, standby signal is provided, is gone out according to maximum reactive power
Power carries out instruction distribution.
3) for the reactive power allocation strategy of Wind turbines and multiple reactive power compensating apparatus are as follows:
(1) when effective reactive power capacity of Wind turbines can satisfy the reactive power demand of wind power plant, idle function
The allocation strategy of rate are as follows:
(a) firstly, reactive power demand is allocated between multiple reactive power compensating apparatus using similar Margin Method, nothing
Function compensation equipment preferentially acts, quick response power grid demand.
(b) according to the principle of local compensation, Wind turbines are allocated according to OPTIMAL REACTIVE POWER power, reduce nothing in wind power plant
Function trend carries out reactive power distribution using similar Margin Method between Wind turbines.Replace the Reactive Power Margin of reactive-load compensation equipment.
If (c) reactive-load compensation equipment failure, directly realized by b) step.
(2) when total reactive power capacity of wind power plant can satisfy demand, but effective reactive power of Wind turbines is held
When amount is not able to satisfy wind power plant demand, the allocation strategy of reactive power are as follows:
(a) firstly, carrying out reactive power distribution using similar Margin Method between Wind turbines.
(b) secondly, remaining reactive power demand is carried out between multiple reactive power compensating apparatus using similar Margin Method
Distribution.
(3) when total reactive power capacity of wind power plant is not able to satisfy wind power plant demand, standby signal is provided, according to maximum
Idle power output carries out reactive power instruction distribution.Reactive power allocation strategy at this time are as follows:
(a) the target reactive power value of all reactive power compensating apparatus is that the maximum effectively reactive power of the equipment is held
Amount；
(b) the target reactive power value of all Wind turbines is the maximum reactive power value of the Wind turbines.
Detailed description of the invention
Fig. 1 is the data flow diagram of control method of the present invention；
Fig. 2 is the flow chart of control method of the present invention.
Specific embodiment
A kind of wind power plant idle work optimization progress control method based on the whole network while discontinuity surface of the invention, content include:
1) substation AVC master controller receives clockwork clock synchronization signal by way of B code, when guaranteeing with the operation of AVC main website
Mark is unified；
2) abundant according to the reactive power for surveying wind data and aerogenerator unit safe reactive power data calculating Wind turbines in real time
Degree and OPTIMAL REACTIVE POWER power, and safety factor is set, judge that Wind turbines maximum can send out reactive power；
3) according to reactive power compensator operating status and operation data, the reactive power for calculating reactive power compensator in real time is abundant
Degree；
4) wind farm grid-connected voltage, reactive power operation data are obtained by the substation PMU, introduce delay correction factor,
Calculate boss's station wind farm grid-connected reactive power demand of same time section and wind power plant reactive power optimal control；
5) reactive power compensator of fast response time first acts, and needs in minimum time scale response grid entry point reactive power
It asks；
6) reactive power distribution is carried out to the Wind turbines of operation using similar Margin Method, and replace reactive power compensator without
Function power margin；
7) operating parameter of Wind turbines is standardized, is suitable for different types of wind power generating set.
The present invention can be used similar Margin Method and carry out wattles power economic equivalent, similar Margin Method master to running Wind turbines
Reactive power and OPTIMAL REACTIVE POWER power ratio size, every unit are sent out in fact and can be mentioned according to the operating status of Wind turbines, unit
Wattles power economic equivalent distribution is carried out for Wind turbines of the maximum reactive power to operation；
Reactive power and OPTIMAL REACTIVE POWER power ratio size, every machine are sent out in fact according to the operating status of Wind turbines, unit
Group can provide maximum reactive power and carry out wattles power economic equivalent control to Wind turbines, fully consider various aerogenerator unit safes
The reactive power upper limit, the big Wind turbines of reactive power nargin preferentially carry out idle power output, failure but can run Wind turbines, face
The idle power output of nearly reactive power upper limit unit flexible control guarantees that grid entry point voltage is optimal, while realizing to Wind turbines
Defense controls.
Qout=k1X(k2(Qall/Qopt)+k3Qmax)
Qout--- -- indicates the instruction of Wind turbines reactive power；
X --- -- indicates running of wind generating set state；
Qall--- -- indicates Wind turbines hair reactive power in fact；
QoptThe OPTIMAL REACTIVE POWER power of --- -- expression Wind turbines；
Qmax--- --- indicates the safe reactive power of maximum of Wind turbines；
k1、k2、k3-- it indicates the weight coefficient of items, artificial setting or automatic calculating can be switched.
Using with the whole network same time profile data, cooperate AVC main website to realize station end AVC control function, at present wind-powered electricity generation
Unit interactive information does not have clock synchronization and markers, introduces delay correction factor, abundant weighted information interaction spent time, so that wind
Operational data is in same time section in electric field, and then optimizes whole audience reactive power；
Kt=k4Qt+ k5Qmo
Kt--- -- indicates Wind turbines delay correction factor；
Qt--- -- indicates the real hair reactive power before Wind turbines delay cycle；
Qmo--- -- indicates the real hair reactive power at Wind turbines current time；
k4、 k5-- it indicates the weight coefficient of items, artificial setting or automatic calculating can be switched.
With into the operating parameters of Wind turbines is standardized, by the setting of parameter, adapts to different type Wind turbines
Operation characteristic and idle power producing characteristics；Standardized parameter includes: Wind turbines hair reactive power, running of wind generating set shape in fact
The maximum safe reactive power of state, Wind turbines.
This method is based on the whole network discontinuity surface simultaneously, using the voltage of wind farm grid-connected point as control target, when system occurs
When disturbance or wind farm wind velocity, load variations cause voltage fluctuation, pass through the association to reactive power compensating apparatus and Wind turbines
Regulation system, makes the voltage-tracing voltage-target of grid entry point.This method the following steps are included:
1) target grid entry point voltage instruction when receiving the band that AVC main website issues obtains grid entry point fortune from the substation wind power plant PMU
Row data；
2) superposition delay correction factor, calculates wind farm grid-connected working voltageWith wind farm grid-connected point target voltageIn the absolute value of the difference of same time section, i.e.,；IfDead zone is adjusted greater than voltage
3) setting value then enters step, otherwise returns to step 1)；
3) reactive power compensating apparatus of all normal operations and the real hair reactive power of Wind turbines are calculated；It calculates
The reactive loss of wind power plant,, whereinIt is the reactive power collection value of wind farm grid-connected point；
4) impedance of method of successive approximation computing system is used, grid entry point target voltage is then calculated according to system impedance
Corresponding reactive power；
5) wind power plant target reactive power is calculated,；
6) wind power plant target reactive power is carried out between reactive power compensating apparatus and Wind turbinesDistribution, such as
Shown in Fig. 2, the specific steps are as follows:
A) judge whether there is the reactive power compensating apparatus of normal operation, if it does not, enter step b), otherwise into
Enter step c)；
B) judge whether the reactive power capacity of all Wind turbines is greater than, if it is greater than, use is similar
Margin Method distributes idle between Wind turbines；Otherwise, the target reactive power value of every Wind turbines is this Wind turbines
Maximum reactive power value is simultaneously emitted by the insufficient alarm signal of Reactive Power Margin；It enters step 7)；
C) regulating command, quick response power grid demand are sent to reactive-load compensation equipment；Judge the Wind turbines operated normally
Reactive power capacity whether be greater than, if it is greater than, enter step d), otherwise, enter step e)；
D) according to the principle of reactive power compensation on the spot, reactive power distribution is carried out using similar Margin Method to Wind turbines；It sets
The idle power output for changing reactive compensation, makes reactive compensation have maximum Reactive Power Margin, in case the reactive voltage of next round is quickly adjusted；
It enters step 7)；
E) judge whether total reactive power capacity of the reactive power compensating apparatus operated normally and Wind turbines is greater than, if it is greater than, enter step f), otherwise, enter step g)；
F) firstly, the Wind turbines operated normally are according to maximum safe reactive power QmaxCarry out idle power output；Then, will
Remaining reactive requirement is allocated between reactive-load compensation equipment using similar Margin Method；It enters step 7)；
G) the target reactive power value of the reactive power compensating apparatus of each normal operation is the maximum capacity of the equipment；Often
The target of platform Wind turbines is without the safe reactive power value of maximum that work value is this Wind turbines；It is idle abundant to be simultaneously emitted by wind power plant
Spend insufficient alarm signal；It enters step 7)；
7) idle control instruction is issued to reactive power compensating apparatus and Wind turbines；
8) control instruction is received to reactive power compensating apparatus and Wind turbines, after the completion of instruction execution, return to step
1)。
Claims (3)
1. a kind of wind power plant idle work optimization progress control method based on the whole network while discontinuity surface, content include:
1) substation AVC master controller receives clockwork clock synchronization signal by way of B code, guarantees to unite with AVC main website operation markers
One；
2) according to survey in real time wind data and aerogenerator unit safe reactive power data calculate Wind turbines reactive power nargin and
OPTIMAL REACTIVE POWER power, and safety factor is set, judge that Wind turbines maximum can send out reactive power；
3) according to reactive power compensator operating status and operation data, the reactive power nargin of reactive power compensator is calculated in real time；
4) wind farm grid-connected voltage, reactive power operation data are obtained by the substation PMU, introduces delay correction factor, calculates
Boss's station wind farm grid-connected reactive power demand of same time section and wind power plant reactive power optimal control；
5) reactive power compensator of fast response time first acts, and responds grid entry point reactive power demand in minimum time scale；
6) reactive power distribution is carried out using Wind turbines of the similar Margin Method to operation, and replaces the idle function of reactive power compensator
Rate nargin；
7) operating parameter of Wind turbines is standardized, is suitable for different types of wind power generating set；
Wattles power economic equivalent is carried out to running Wind turbines using similar Margin Method, similar Margin Method is mainly according to wind turbine
Hair reactive power and OPTIMAL REACTIVE POWER power ratio size, every unit can provide maximum idle function in fact for the operating status of group, unit
Rate carries out wattles power economic equivalent distribution to the Wind turbines of operation；
According to the operating status of Wind turbines, unit, hair reactive power and OPTIMAL REACTIVE POWER power ratio size, every unit can in fact
Maximum reactive power is provided, wattles power economic equivalent control is carried out to Wind turbines, has fully considered that various aerogenerator unit safes are idle
The upper limit of the power, the big Wind turbines of reactive power nargin preferentially carry out idle power output, failure but can run Wind turbines, close on nothing
The idle power output of function upper limit of the power unit flexible control guarantees that grid entry point voltage is optimal, while realizing the protection to Wind turbines
Property control；
Qout=k1X(k2(Qall/Qopt)+k3Qmax)
Qout--- -- indicates the instruction of Wind turbines reactive power；
X --- -- indicates running of wind generating set state；
Qall--- -- indicates Wind turbines hair reactive power in fact；
QoptThe OPTIMAL REACTIVE POWER power of --- -- expression Wind turbines；
Qmax--- --- indicates the safe reactive power of maximum of Wind turbines；
k1、k2、k3-- it indicates the weight coefficient of items, artificial setting or automatic calculating can be switched.
2. a kind of wind power plant idle work optimization progress control method based on the whole network while discontinuity surface according to claim 1,
It is characterized in that using with the whole network same time profile data, cooperate AVC main website to realize station end AVC control function, at present wind-powered electricity generation
Unit interactive information does not have clock synchronization and markers, introduces delay correction factor, abundant weighted information interaction spent time, so that wind
Operational data is in same time section in electric field, and then optimizes whole audience reactive power；
Kt=k4Qt+ k5Qmo
Kt--- -- indicates Wind turbines delay correction factor；
Qt--- -- indicates the real hair reactive power before Wind turbines delay cycle；
Qmo--- -- indicates the real hair reactive power at Wind turbines current time；
k4、 k5-- it indicates the weight coefficient of items, artificial setting or automatic calculating can be switched.
3. a kind of wind power plant idle work optimization progress control method based on the whole network while discontinuity surface according to claim 1,
It is characterized in that the operating parameter of Wind turbines is standardized, by the setting of parameter, the operation of different type Wind turbines is adapted to
Characteristic and idle power producing characteristics；Standardized parameter includes: Wind turbines hair reactive power, running of wind generating set state, wind in fact
The maximum safe reactive power of motor group.
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| CN117060592B (en) * | 2023-08-30 | 2024-02-23 | 国网山东省电力公司德州供电公司 | Multi-domain cooperation-based power grid data synchronous calibration method and system |
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| CN102969722A (en) * | 2012-11-12 | 2013-03-13 | 南京中德保护控制系统有限公司 | Wind farm reactive voltage control method |
| CN104124713A (en) * | 2014-08-06 | 2014-10-29 | 国网吉林省电力有限公司 | Optimized operation control method for wind turbine generators |
| CN105244923A (en) * | 2015-09-11 | 2016-01-13 | 中国电力科学研究院 | Double-fed wind turbine generator set-based wind farm reactive power control method |
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