CN106505613B - A kind of wind power controller - Google Patents
A kind of wind power controller Download PDFInfo
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- CN106505613B CN106505613B CN201610972579.7A CN201610972579A CN106505613B CN 106505613 B CN106505613 B CN 106505613B CN 201610972579 A CN201610972579 A CN 201610972579A CN 106505613 B CN106505613 B CN 106505613B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
A kind of wind power controller, including central processing unit, power module, power grid detection module, communication module, exception processing module, active power and frequency control module and reactive power/voltage control module.The central processing unit is connect with power module, power grid detection module, communication module, exception processing module, active power and frequency control module and reactive power/voltage control module respectively.Wind power controller is mounted in booster stations, forms wind power Control System NetWork with a wind-powered electricity generation group of planes, reactive power compensator, booster stations monitoring system, wind power plant monitoring (SCADA) system and main website, control centre；The active and voltage control instructions that wind power controller receives main website, control centre by communication modes or locally issues, control is uniformly coordinated to a wind-powered electricity generation group of planes, reactive power compensator and load tap changer gear, it carries out active power and reactive power is adjusted, realize frequency and Voltage Stability Control.
Description
Technical field
The present invention relates to a kind of wind power controllers.
Background technique
As the installed capacity of wind-driven power in China is continuously increased, ratio of the wind-powered electricity generation in power grid is increasing.And wind-powered electricity generation interval
The characteristics of formula, fluctuation and randomness, no image of Buddha normal power supplies equally control its active reactive power output.Specific difficulty table
Present: the fluctuation of wind power plant active power output makes the frequency stability of power grid be deteriorated with itself without fm capacity；Wind turbines pair
Power grid does not have machinery inertial, has negative effect to stability of power system；The frequent start-stop of unit causes power grid in wind power plant
Frequency fluctuation and voltage fluctuation.These problems have seriously affected the safety and economy of electric system, are current wind-electricity integrations
One of technical difficult points.China's wind-electricity integration problem is special and complicated, lacks the support of the relevant technologies and equipment both at home and abroad,
Prevent the wind power plant built up is unable to fully discharge from playing benefit, wind power plant production capacity well.
The key for studying wind farm grid-connected technology is that unit accesses electrical network analysis as a whole by wind power plant, leads to
The voltage for improving wind farm grid-connected point, frequency stability are crossed, to improve the grid-connected performance of entire wind power plant.This needs to pass through wind-powered electricity generation
Power controller realize that the active and voltage including grid entry point controls.
The existing wind power control system in China includes wind power plant monitoring (SCADA) system, active automatic control
(AGC) system and voltage automatically control (AVC) system.AGC and AVC system receives the active and voltage that dispatching of power netwoks issues respectively
Control instruction distributes the active and idle reference value of wind turbine, then is issued to each typhoon by wind power plant monitoring (SCADA) system
Machine, active and idle by control wind turbine achieve the purpose that control wind power.Due to SCADA system and blower it
Between communication cycle it is long (several seconds~tens of seconds), real-time is poor, so control precision is lower.In addition, the above method is only kept watch
Generator unit considers electric field as a whole, since the wind-resources situation of seat in the plane each in wind power plant is different, actual motion
Each power of the assembling unit differ greatly, there are problems that fatigue is unevenly distributed；Also lack the differentiation for Various Seasonal condition
Processing.
There are mainly two types of wind power plant reactive power sources: blower and concentration reactive-load compensation equipment.Concentrate reactive-load compensation equipment, example
As static passive compensation device (SVC) and static reactive generator (SVG) play actively the reactive power equilibrium of wind power plant
Effective effect, but that there is also costs is high, loss is big and the defect of stability difference.And blower has additional sending reactive power
Ability, but single freely controlling for blower can cause wind power plant reactive power in-fighting, be unable to reach specified control target.Wind power plant
The coordinated control of interior reactive power source is to improve Network Voltage Stability, while improving the key technology of wind power plant economy.
In recent years, wind power plant is assisted to participate in the pass that system frequency adjustment has also obtained Many researchers using energy-storage system
Note.The energy-storage system of use has the different types such as super conductive magnetic storage energy, flywheel energy storage.But since cost is excessively high, and technology is still
It is immature, it is also difficult to be widely applied.The research of wind-powered electricity generation frequency modulation is concentrated in the frequency modulation control of single unit at present, including is adopted
With virtual inertia control, hypervelocity control and pitch control etc., also lack the system control strategy from wind power plant control plane.
Summary of the invention
Real-time existing for existing wind power plant control technology is poor, precision is low it is an object of the invention to overcoming, and does not have tune
The shortcomings that fatigue is unevenly distributed between frequency ability and blower proposes a kind of wind power controller (WPPC).
Wind power controller of the present invention is mounted in booster stations, is supervised with a wind-powered electricity generation group of planes, reactive power compensator, booster stations
Control system, wind power plant monitoring (SCADA) system and main website, control centre form wind power Control System NetWork；Wind power plant function
The active and voltage control instructions that rate controller receives scheduling station system by communication modes or locally issues, to wind turbine
Group, reactive power compensator and load tap changer gear are uniformly coordinated control, carry out the continuous tune of active power and reactive power
Section.Wind power controller of the present invention is the important link that control centre regulates and controls wind field, and power grid can be enhanced to wind-powered electricity generation
Digestion capability.
Wind power controller of the present invention include central processing unit, power module, power grid detection module, communication module,
Exception processing module, active power and frequency control module and reactive power/voltage control module.
The power module is used to provide alternating current-direct current two-way power supply for the present invention；
The power grid detection module includes high voltage bus voltage, frequency for measuring the electric network information of wind farm grid-connected point
Rate, active output and idle output；
The communication module is for realizing wind power controller and a wind-powered electricity generation group of planes, reactive power compensator, booster stations
The real-time communication of monitoring system, SCADA system and main website, control centre is led to for transmitting control signal and key feedback data
Delays time to control is interrogated within 100ms.
The central processing unit passes through acquisition power grid detection module, the collected electric network information of communication module and each
The information of other equipment in blower, reactive power compensator and wind power plant passes through active power and frequency control mould in conjunction with dispatch command respectively
Block and reactive power/voltage control module, issue the active and idle control instruction of dynamic, then by communication module be sent to wind turbine with
Reactive power compensator realizes the active and idle quick adjusting of wind power plant.
The exception processing module includes communication event for providing the alarm of all kinds of exceptions or failure, exception or failure
Barrier, device exception, electric network fault, system operation exception etc..The exception processing module can automatic blocking, stop distribution knot
Fruit output, and it is transferred to local control automatically, and form logout.
The active power and frequency control module is continuously adjusted for active power of wind power field, realizes frequency stabilization.Specifically
Target includes: 1) to guarantee that every unit output is balanced as far as possible under winter mode, avoids shutting down；2) summer mode is enough in guarantee
Under the premise of power margin, so that operating unit minimum number, to reduce the abrasion of unit, while guaranteeing that entire wind power plant unit stops
Machine number is balanced；3) guarantee that each power of the assembling unit control target value is as impartial as possible under wind regime enabled condition, balanced wind turbine
The fatigue of group；4) when mains frequency changes, wind power plant can increase or decrease active power output automatically, provide for power grid
Primary frequency modulation effect；5) meet power grid to the limitation in 1 minute and 10 minutes of the active change rate of wind power plant.
Specific step is as follows for active power of wind power field control of the present invention:
Step 1-1: power P can be sent out according to wind-powered electricity generation field theoryava, the active target that issues of frequency departure △ f and dispatching of power netwoks
Value Pset, calculate the active setting value P ' of wind power plant at current timeset；
Step 1-2: the active setting value P ' of wind power plant is calculatedsetWith wind power plant actual value P0Power deviation △ P, power is inclined
Poor △ P should meet requirement of the power grid to the active change rate of wind power plant 1 minute and 10 minutes change rates；
Step 1-3: power margin γ is calculatedpCharacterize the potential capacity of current wind power plant；
Step 1-4: according to different seasonal modes and the calculated power margin value of step 1-3, start and stop control is carried out；
Step 1-5: the distribution of work has been carried out to a wind-powered electricity generation group of planes by active dispensing controller, active dispensing controller includes equal
Sub-controller and balance controller two parts.
The reactive power/voltage control module is continuously adjusted for wind power plant reactive power, realizes voltage stabilization.Specifically
Target includes: 1) to maintain wind power plant exit potential balance；2) coordinate a variety of reactive power sources in wind power plant, make full use of blower itself
It issues idle；3) optimize reactive power distribution in wind power plant, reduce loss of wind farm；4) meet all kinds of security constraints, including height
Press side bus voltage out-of-limit, active reactive is out-of-limit, main transformer electric current is out-of-limit, limit etc. that blower is idle.
Specific step is as follows for wind power plant reactive power control of the present invention:
Step 2-1: with wind farm grid-connected voltage or it is idle for control target, using PI closed loop regulative mode, and pass through
After security constraint, wind power plant reactive power setting value Q is obtainedref.The security constraints include that high side bus voltage is got over
Limit, active reactive is out-of-limit, main transformer electric current is out-of-limit, limit etc. that blower is idle.
Step 2-2: as wind power plant reactive power setting value QrefLess than in wind power plant when the sum of idle limit of controllable unit,
Wind power controller carries out each unit without the distribution of work by constant power factor, no to then follow the steps 2-3；
Step 2-3: if wind power plant reactive power setting value QrefGreater than the sum of idle limit of controllable unit in wind power plant,
But when the sum of being no more than whole audience reactive power source, Wind turbines carry out reactive compensation, and extra idle portion by maximum idle power output
Reactive power compensator will be distributed to by, which dividing, compensates, no to then follow the steps 2-4；
Step 2-4: if wind power plant reactive power setting value QrefGreater than the sum of reactive power sources whole in wind power plant, i.e. wind
Motor group and the idle active volume of reactive power compensator are not enough to support wind power plant exit potential in normal operation range, wind
Electric field power controller issues load tap changer notch command to booster stations monitoring system, by adjusting transformer tap first gear
Position carries out voltage adjustment.
The invention has the following advantages over the prior art:
Compared with prior art, the present invention realizes wind power plant closed-loop control, solves and nets source in large-scale wind power integration
The technical problem of coordination improves the controllability of wind power plant, has practical value to the exploitation of power grid friendly Intelligent wind power field；Together
When, solve the problems, such as the communication delay in traditional wind power control；Active automatic control (AGC) system of wind power plant can be replaced
System and voltage automatically control (AVC) system.
Wind power controller provided by the invention can sufficiently discharge blower and additionally issue reactive power and active standby
Ability reduces reactive power compensator, the construction investment of energy-storage system and running wastage, and more dynamically accurately real
The voltage of existing wind power plant PCC point, frequency stabilization control, make wind power plant active and reactive power reach better dynamic equilibrium, improve
Wind farm grid-connected performance.
Detailed description of the invention
Fig. 1 wind power controller architecture block diagram；
Fig. 2 wind power Control System NetWork structure；
Fig. 3 is automatic blocking algorithm flow chart；
Fig. 4 is wind-powered electricity generation field frequencies range-active response curve；
Fig. 5 is winter mode algorithm flow chart；
Fig. 6 is summer mode algorithm flow chart；
Fig. 7 is that wind power plant has distribution of work control block diagram；
Fig. 8 is wind power plant reactive voltage control block diagram.
Specific embodiment
As shown in Figure 1, wind power controller of the present invention include central processing unit, power module, power grid detection module,
Communication module, exception processing module, active power and frequency control module and reactive power/voltage control module.The central processing unit difference
With power module, power grid detection module, communication module, exception processing module, active power and frequency control module and reactive power/voltage control
Module connection.
Wind power controller WPPC of the present invention and a wind-powered electricity generation group of planes, reactive power compensator, booster stations monitoring system, wind-powered electricity generation
Field monitoring (SCADA) system and main website, control centre form wind power Control System NetWork.Fig. 2 show wind power
Control System NetWork structure.The wind power controller is arranged near wind field booster stations.Wind power controller
Need to measure the busbar voltage of wind farm grid-connected point, frequency, active output and idle output, in conjunction with the steady of mains frequency and voltage
Qualitative requirement issues the active control signal with dynamic reactive of dynamic, and control signal is sent by high-speed field bus to wind
Motor group, reactive power compensator and booster stations monitoring system realize the active and idle quick adjusting of wind power plant.
Wind power controller is communicated with electric power dispatching system using TCP/IP network mode, and communication protocol is based on
IEC870-5-104 Telecontrol Protocol (hereinafter referred to as 104 specifications).Wind power controller is constantly in as substation listens to shape
State waits main website connection request.TCP connection is established after issuing connection request by main station side, then starts to transmit data, above send week
Phase property scan data and the various command messages for receiving main website.
Wind power controller acquires the operation information of each unit in real time, and issue for each unit it is active/
Idle control instruction, wind power controller are communicated with fan master control system using Modbus-TCP agreement.
Wind power controller acquires the operation information of reactive power compensator in real time, and issues for each reactive compensation
The control instruction of device.Reactive power compensator includes static passive compensation device (SVC) and static reactive generator (SVG).Wind
Electric field power controller is communicated with reactive power compensator by Ethernet or serial mode, communication protocol using Modbus or
104 specifications.
Wind power controller and booster stations monitoring system real time communication, the data for needing to acquire include booster stations main transformer
The real time datas such as tap, each the active and reactive of item collection electric line, voltage and current, and the remote control command of tap is issued, by
It, which is responded, executes.Communication uses ether net mode, and communication protocol uses Modbus or 104 specifications.
The information that the active automatic control of wind power plant and voltage automatically control also is uploaded to wind-powered electricity generation by wind power controller
Field monitoring (SCADA) system is displayed data and is stored.It is communicated by ether net mode, communication protocol uses Modbus-TCP
Agreement.
Wind power controller provides the alarm function of all kinds of exceptions or failure, exception or failure include communication failure,
Device is abnormal, such as power supply trouble, PLC are restarted, electric network fault, system are operating abnormally etc..Can automatic blocking, stop distribution knot
Fruit output, and it is transferred to local control automatically, and form logout, locking process is as shown in Figure 3.
Specific step is as follows to active power of wind power field control by the present invention:
Step 1-1: power P can be sent out according to wind-powered electricity generation field theoryava, the active target that issues of frequency departure △ f and dispatching of power netwoks
Value Pset, calculate the active setting value P ' of wind power plant at current timeset.It is illustrated in figure 4 wind-powered electricity generation field frequencies range-active response curve,
The active preset value calculation method of each section of wind power plant is as follows in figure:
1) when system frequency is within the scope of frequency controlling dead error, wind power plant active power output is set as B-C sections of curves, should be pre-
The spare capacity of d% under current wind speed is stayed, can use 10% under normal circumstances.The active setting value P ' of wind power plantsetAs shown in formula (1)；
P′set=Min (Pset,Pava(1-d%)) (1)
2) when below frequency corresponding to system frequency drops to B point, wind power plant should follow the decline curve of section A-B
To make under active power output increase and at most releasable current wind speed 100% available power, the active setting value of wind power plant as early as possible
P’setAs shown in formula (2)；
P′set=Min (Pset,Pava-KfΔf) (2)
Wherein, KfFor active coefficient of frequency modulation；
3) when more than frequency corresponding to system frequency rises to C point, wind power plant should be come along C-D sections of decline curve
Reduce under active power output and at least releasable current wind speed 20% available power, the active setting value P ' of wind power plantsetCalculation method
Ibid, as shown in formula (2)；
4) when frequency corresponding to system frequency continuously rises to D point, wind power plant is out of service；
P′set=0 (3)
Each parameter need to be set according to the specific requirement of local electric system in above-mentioned curve, the value range of parameter such as following table
It is shown:
| Frequency (Hz) | Active power output percentage (%) | |
| A | 48-49.5 | 50-100 |
| B | 49.5-50 | 50-100 |
| C | 50-50.5 | 50-100 |
| D | 50.5-52 | 20-100 |
| E | 50.5-52 | 0 |
Step 1-2: the active setting value P ' of the whole audience is calculatedsetWith actual value P0Deviation △ P, △ P should meet power grid to wind
The requirement of the active change rate of electric field 1 minute and 10 minutes change rates.According to GB/T 19963-2011, " wind power plant accesses power train
Unite technical stipulation ", under normal operation, 10 minutes active power variation threshold limit values of wind power plant are installed capacity/3, minute 1
It is installed capacity/10 that active power, which changes threshold limit value,.
Step 1-3: the power margin γ of wind power plant is calculatedp, definition:
In above formula: Pava(j) it can send out active for the theory of jth platform unit, be calculated according to actual wind speed power curve, Prate
(j) for i-th unit theory can generated output, P0(j) be jth platform unit reality it is active, M is wind power plant whole unit number
Amount.
Step 1-4: according to different seasonal modes and the calculated power margin value of step 1-3, start and stop control is carried out.
As previously mentioned, the control target of winter mode is to guarantee to shut down minimum number, each unit output because of active power dispatch
Balanced as far as possible, winter mode flow chart is as shown in Figure 5；
As previously mentioned, the control target of summer mode is to guarantee operation as far as possible under the conditions of guaranteeing enough power margins
Unit minimum number, and the unit output run is balanced.Summer mode algorithm flow chart is as shown in Figure 6.
The specific method is as follows for start and stop control:
1) control program enters winter mode or summer mode according to current environmental temperature or month selection first；
2) it determines and shuts down queue and open fleet column, wherein shutting down queue is to open according to current all grid-connected unit the last times
The arrangement of the time of machine from front to back is opened fleet and is classified as and all shuts down times that unit the last times shut down from forward direction according to current
Arrangement afterwards；
3) it is as follows to shut down control logic for winter mode:
When power margin >=0.5 of wind power plant, continue 10 minutes, and in 10 minutes no shutdown instruction issue, then according to
The sequence for shutting down queue successively carries out compressor emergency shutdown judgement；If the i-th # platform unit allows shutdown operation, and the unit is practical
Power≤50kW continues 10 minutes, then executes shutdown operation；
4) it is as follows to open machine control logic for winter mode:
As the power margin < 0.2 of wind power plant, continues 1 minute or actual power < setting power and continue 1 minute, and 1
Without enabled instruction in minute, then unit is successively carried out according to the sequence for opening fleet column and open machine judgement；If jth # platform unit meets
Unit starting condition then executes and opens machine operation；
5) it is as follows to shut down control logic for summer mode:
When power margin >=0.2 of wind power plant, continue 10 minutes, and in 10 minutes no shutdown instruction issue, then according to
The sequence for shutting down queue successively carries out compressor emergency shutdown judgement；If the i-th # platform unit allows shutdown operation, shutdown operation is executed；
6) it is as follows to open machine control logic for summer mode:
As the power margin < 0.05 of wind power plant, continues 1 minute or actual power < setting power and continue 1 minute, and
Without enabled instruction in 1 minute, then unit is successively carried out according to the sequence for opening fleet column and open machine judgement；If jth # platform unit meets
Unit starting condition then executes and opens machine operation；
7) no matter winter or summer mode, each control period only allows a unit to open machine or shutdown operation；
Step 1-5: include to the distribution of work, active dispensing controller has been carried out in a wind-powered electricity generation group of planes by active dispensing controller
Equalization controller and balance controller two parts, control block diagram are as shown in Figure 7.
Wherein, the target respectively controlled is to have carried out the distribution of work to each unit according to identical change amount.Divide equally active
In controller, it is that current power adds offset that every unit, which gives power, which uses Principle of Average Allocation, every machine
Identical, the offset of group are as follows:
Δ P (j)=(P 'set-P0)/N (5)
In above formula, Δ P (j) is the power offset of jth platform unit, P 'setFor the active setting of wind power plant of dispatching down distributing
Value, P0For the total active output of current wind power plant, N is the number of units of the controllable unit of wind power plant.
The then jth platform unit reference power of equalization controller output are as follows:
Pref(j)=P0(j)+ΔP(j) (6)
In above formula, P0(j) be jth platform unit active output, Pref(j) be equalization controller output active reference value.
The target of Balance route is to compensate according to the principle of power equalization to each active setting value of unit, makes each
Unit fatigue is uniformly distributed.
The output P of balance controllereq(j) are as follows:
In formula, K is balance controller coefficient, Peq(j) be balance controller output active offset, N be wind power plant can
Control the number of units of unit；
The setting power P of final jth platform unit 'ref(j) are as follows:
P’ref(j)=Pref(j)+Peq(j) (8)
Due to balance controller outputIt is 0, therefore the sum of power excursion for being assigned to each unit is still etc.
In Pset-P0。
The present invention is as shown in Figure 8 to reactive-power control method of wind power field, the specific steps are as follows:
Step 2-1: with wind farm grid-connected voltage or it is idle for control target, using PI closed loop regulative mode, and pass through
After security constraint, wind power plant reactive power setting value Q is obtainedref.Security constraints include that high side bus voltage is out-of-limit, are had
Function reactive power constraints, main transformer electric current are out-of-limit, limit etc. that blower is idle.
Step 2-2: if wind power plant reactive power setting value QrefLess than the sum of idle limit of controllable unit in wind power plant
When, wind power controller carries out each unit without the distribution of work by constant power factor, and specific allocation plan is as follows:
Assuming that there is M feeder line in wind field, the reactance of i-th feeder line is X (i), the total active output of the connected unit of the feeder line
For Pline(i), the reactive loss Q of this feeder lineloss(i), then the total idle reference value Q of the feeder line institute wind-connectorline(i) are as follows:
In above formula, since feeder current I (i) can be obtained by measurement, the route reactive loss Q of i-th feeder lineloss
(i) are as follows:
Qloss(i)=I2(i)X(i) (10)
If i-th feeder line has M platform unit, then the idle setting value Q of m platform unitref(m) are as follows:
The reference power factor of all units is equal on i-th feeder line are as follows:
Step 2-3: if wind power plant reactive power setting value QrefGreater than the sum of idle limit of controllable unit in wind power plant,
But when the sum of being no more than whole audience reactive power source, unit carries out reactive compensation by maximum idle power output, and extra reactive component will
Reactive power compensator is distributed to compensate.
Wherein, QmaxIt (j) is the idle upper limit value of jth platform unit, QwtFor the maximum idle output valve of units all in wind power plant it
With QsvgFor the idle output valve of reactive power compensator.
Step 2-4: if wind power plant reactive power setting value QrefGreater than the sum of reactive power sources whole in wind power plant, i.e., without
The idle active volume of Reactive power compensation installations and Wind turbines is not enough to support wind power plant exit potential in normal operation range, wind
Electric field power controller issues load tap changer notch command to booster stations monitoring system, by adjust load tap changer into
The adjustment of row voltage.
Claims (6)
1. a kind of wind power controller, the wind power controller includes central processing unit, power module, power grid
Detection module, communication module, exception processing module, active power and frequency control module and reactive power/voltage control module；The center
Processor respectively with power module, power grid detection module, communication module, exception processing module, active power and frequency control module and nothing
The connection of function voltage control module；
The central processing unit is by obtaining power grid detection module, the collected electric network information of communication module and wind turbine
The information of other equipment in group, reactive power compensator and wind power plant passes through active power and frequency control module in conjunction with dispatch command respectively
With reactive power/voltage control module, the active and idle control instruction of dynamic is issued, then a wind-powered electricity generation group of planes and nothing are sent to by communication module
Reactive power compensation installations realize the active and idle quick adjusting of wind power plant,
It is characterized by: the active power and frequency control module is to active power of wind power field control, specific step is as follows:
Step 1-1: power P can be sent out according to wind-powered electricity generation field theoryava, the active target value that issues of frequency departure △ f and dispatching of power netwoks
Pset, calculate the active setting value P ' of wind power plant at current timeset；
Step 1-2: the active setting value P ' of wind power plant is calculatedsetWith the active actual value P of wind power plant0Power deviation △ P, power deviation
△ P should meet requirement of the power grid to the active change rate of wind power plant 1 minute and 10 minutes change rates；
Step 1-3: power margin γ is calculatedpCharacterize the potential capacity of current wind power plant；
Step 1-4: according to different seasonal modes and the calculated power margin value of step 1-3, start and stop control is carried out；
Step 1-5: the distribution of work has been carried out to a wind-powered electricity generation group of planes by active dispensing controller, active dispensing controller includes equal sub-control
Device and balance controller two parts processed.
2. wind power controller described in accordance with the claim 1, it is characterised in that: the step 1-1 is according to wind power plant
Theory can send out power Pava, the active target value P that issues of frequency departure △ f and dispatching of power netwoksset, calculate the wind power plant at current time
Active setting value P 'setMethod it is as follows:
1) when frequency departure △ f is in dead zone range, wind power plant should reserve the spare capacity of d% under current wind speed, and wind power plant has
Function setting value P 'setAs shown in formula (1)；
P′set=Min (Pset,Pava(1-d%)) (1)
2) when f < 0 frequency departure △ and not in dead zone range, wind power plant can increase active power output automatically, and at most releasable
100% available power, the active setting value P ' of wind power plant under current wind speedsetAs shown in formula (2)；
P′set=Min (Pset,Pava-KfΔf) (2)
Wherein, KfFor active coefficient of frequency modulation；
3) when f > 0 frequency departure △ and not dead zone range constantly, wind power plant can reduce active power output automatically, and can at least release
Put under current wind speed 20% available power, the active setting value P ' of wind power plantsetCalculation method is same as above, as shown in formula (2)；
4) when f > 0 frequency departure △, and when system frequency is more than the maximum frequency that power grid allows, wind power plant is out of service；
P′set=0 (3).
3. wind power controller described in accordance with the claim 1, which is characterized in that the step 1-3 calculates wind power plant
Power margin γpMethod it is as follows:
Definition:
In above formula: Pava(j) it can send out active for the theory of jth platform unit, be calculated according to actual wind speed power curve, Prate(j) it is
The theory of i-th unit can generated output, P0(j) be jth platform unit reality it is active, M is wind power plant whole unit quantity.
4. wind power controller described in accordance with the claim 1, it is characterised in that: the step 1-4 carries out start and stop
Method it is as follows:
1) control program enters winter mode or summer mode according to current environmental temperature or month selection first；
2) it determines and shuts down queue and open fleet column, wherein shutting down queue is to open machine according to current all grid-connected unit the last times
The arrangement of time from front to back is opened fleet and is classified as and all shuts down times that unit the last times shut down from front to back according to current
Arrangement；
3) it is as follows to shut down control logic for winter mode:
When power margin >=0.5 of wind power plant, continue 10 minutes, and no shutdown instruction issues in 10 minutes, then according to shutdown
The sequence of queue successively carries out compressor emergency shutdown judgement；If the i-th # platform unit allows shutdown operation, and the unit actual power
≤ 50kW continues 10 minutes, then executes shutdown operation；
4) it is as follows to open machine control logic for winter mode:
As the power margin < 0.2 of wind power plant, continues 1 minute or actual power < setting power and continue 1 minute, and 1 minute
Interior no enabled instruction then successively carries out unit according to the sequence for opening fleet column and opens machine judgement；If jth # platform unit meets unit
Entry condition then executes and opens machine operation；
5) it is as follows to shut down control logic for summer mode:
When power margin >=0.2 of wind power plant, continue 10 minutes, and no shutdown instruction issues in 10 minutes, then according to shutdown
The sequence of queue successively carries out compressor emergency shutdown judgement；If the i-th # platform unit allows shutdown operation, shutdown operation is executed；
6) it is as follows to open machine control logic for summer mode:
As the power margin < 0.05 of wind power plant, continues 1 minute or actual power < setting power and continue 1 minute, and 1 point
Without enabled instruction in clock, then unit is successively carried out according to the sequence for opening fleet column and open machine judgement；If jth # platform unit meets machine
Group entry condition then executes and opens machine operation；
7) no matter winter or summer mode, each control period only allows a unit to open machine or shutdown operation；
The control target of the winter mode is to guarantee to shut down minimum number because of active power dispatch, and each unit output is equal as far as possible
Weighing apparatus, the control target of the summer mode are to guarantee operating unit quantity as far as possible under the conditions of guaranteeing enough power margins
At least, and the unit output of operation is balanced.
5. wind power controller described in accordance with the claim 1, it is characterised in that: the equal sub-control in the step 1-5
The target of device processed is to have carried out the distribution of work to each unit according to identical change amount；In equalization controller, every unit is given
Power is that current power adds offset, which uses Principle of Average Allocation:
Δ P (j)=(P 'set-P0)/N (5)
Wherein, Δ P (j) is the power offset of jth platform unit, P 'setFor the active setting value of wind power plant of dispatching down distributing, P0To work as
The total active output of preceding wind power plant, N are the number of units of the controllable unit of wind power plant；
The jth platform unit reference power of equalization controller output are as follows:
Pref(j)=P0(j)+ΔP(j) (6)
P0(j) be jth platform unit active output, Pref(j) be equalization controller output active reference value；
The target of balance controller in the step 1-5 is the principle according to power equalization to each active setting value of unit
It compensates, is uniformly distributed each unit fatigue；
The output P of balance controllereq(j) are as follows:
In formula, K is balance controller coefficient, Peq(j) be balance controller output active correction value, N be the controllable machine of wind power plant
The number of units of group；
The setting power P of final jth platform unit 'ref(j) are as follows:
P’ref(j)=Pref(j)+Peq(j) (8)
Due to balance controller outputIt is 0, therefore the sum of the power excursion for being assigned to each unit is still equal to
Pset-P0。
6. wind power controller described in accordance with the claim 1, it is characterised in that: to the step of wind power plant reactive power control
It is rapid as follows:
Step 2-1: with wind farm grid-connected voltage or idle for control target, using PI closed loop regulative mode, and by safety
After constraint, wind power plant reactive power setting value Q is obtainedref；The security constraints include high side bus voltage it is out-of-limit,
Active reactive is out-of-limit, main transformer electric current is out-of-limit and the idle limit of blower；
Step 2-2: as wind power plant reactive power setting value QrefLess than in wind power plant when the sum of idle limit of controllable unit, wind-powered electricity generation
Power controller carries out each unit without the distribution of work by constant power factor, no to then follow the steps 2-3；
Step 2-3: if wind power plant reactive power setting value QrefGreater than the sum of idle limit of controllable unit in wind power plant, still
When no more than the sum of whole audience reactive power source, Wind turbines carry out reactive compensation by maximum idle power output, and extra reactive component will
Reactive power compensator is distributed to compensate, it is no to then follow the steps 2-4；
Step 2-4: if wind power plant reactive power setting value QrefGreater than the sum of reactive power sources whole in wind power plant, i.e. wind turbine
Group and the idle active volume of reactive power compensator are not enough to support wind power plant exit potential in normal operation range, wind power plant
Power controller issues load tap changer notch command to booster stations monitoring system, by adjust load tap changer gear into
The adjustment of row voltage.
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| CN107026461A (en) * | 2017-05-11 | 2017-08-08 | 南京南瑞继保电气有限公司 | A kind of new energy station participates in the fast power control method for coordinating of primary frequency modulation |
| CN107565595A (en) * | 2017-10-18 | 2018-01-09 | 广东电网有限责任公司电力调度控制中心 | A kind of more direct current frequency limiters by the regulation of regulating power size order |
| CN108131247B (en) * | 2017-12-20 | 2020-09-29 | 北京金风科创风电设备有限公司 | Data processing method and device for wind generating set |
| CN108336761B (en) | 2018-04-03 | 2019-04-02 | 北京金风科创风电设备有限公司 | Power control method, device, system and computer equipment for wind farm |
| CN108521142B (en) * | 2018-04-11 | 2020-06-09 | 国网陕西省电力公司电力科学研究院 | Primary frequency modulation coordination control method for wind turbine generator |
| CN109217383B (en) * | 2018-09-30 | 2022-02-11 | 国电联合动力技术有限公司 | Intelligent wind power plant parameter self-adaptive rapid frequency modulation control method and system |
| CN109672218B (en) * | 2018-12-25 | 2023-02-03 | 新疆金风科技股份有限公司 | Wind turbine power control method and device |
| CN110502058B (en) * | 2019-08-21 | 2020-09-25 | 国电南瑞南京控制系统有限公司 | Active power change rate control system for wind power plant |
| CN113013913B (en) * | 2019-12-19 | 2024-01-23 | 金风科技股份有限公司 | Reactive voltage control system and method for wind farm |
| CN111740431B (en) * | 2020-06-11 | 2021-11-12 | 浙江运达风电股份有限公司 | Large wind power plant participating power system frequency modulation control method |
| CN111725841B (en) * | 2020-07-03 | 2021-11-02 | 石家庄科林物联网科技有限公司 | Photovoltaic inverter-based power quality optimization method for distribution transformer area |
| CN113078690B (en) * | 2021-04-30 | 2024-10-15 | 南京河大风电科技有限公司 | Wind power plant automatic power generation control system and method considering fatigue difference of units |
| CN113193601B (en) * | 2021-05-06 | 2023-02-28 | 道莅智远科技(青岛)有限公司 | Wind power plant energy management system and method based on industrial PLC |
| CN113659597B (en) * | 2021-09-06 | 2024-01-23 | 华北电力科学研究院有限责任公司 | Flywheel energy storage control method and device |
| CN113629785A (en) * | 2021-09-16 | 2021-11-09 | 中国船舶重工集团海装风电股份有限公司 | A wind farm integrated power control system based on logic module |
| CN114123353B (en) * | 2022-01-26 | 2022-05-06 | 南方电网数字电网研究院有限公司 | Intelligent energy system based on safety protection and control method thereof |
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