CN106505613A - A kind of wind power controller - Google Patents
A kind of wind power controller Download PDFInfo
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- CN106505613A CN106505613A CN201610972579.7A CN201610972579A CN106505613A CN 106505613 A CN106505613 A CN 106505613A CN 201610972579 A CN201610972579 A CN 201610972579A CN 106505613 A CN106505613 A CN 106505613A
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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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- 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, electrical network detection module, communication module, exception processing module, active power and frequency control module and reactive power/voltage control module.Described central processing unit is connected with power module, electrical network detection module, communication module, exception processing module, active power and frequency control module and reactive power/voltage control module respectively.Wind power controller constitutes wind power Control System NetWork with a wind-powered electricity generation group of planes, reactive power compensator, booster stations monitoring system, wind energy turbine set monitoring (SCADA) system and main website of control centre in booster stations；Wind power controller receives main website of control centre or the active and voltage control instructions for locally issuing by communication modes, control is uniformly coordinated to a wind-powered electricity generation group of planes, reactive power compensator and load tap changer gear, carry 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 controller.
Background technology
As the installed capacity of wind-driven power of China is continuously increased, ratio of the wind-powered electricity generation in electrical network is increasing.And wind-powered electricity generation interval
The characteristics of formula, fluctuation and randomness, it is impossible to its active reactive is exerted oneself as normal power supplies and be controlled.Concrete difficulty table
Now：The active fluctuation that exerts oneself of wind energy turbine set and itself the frequency stability of electrical network is made to be deteriorated without fm capacity；Wind turbines pair
Electrical network does not have machinery inertial, has negative effect to stability of power system；In wind energy turbine set, the frequent start-stop of unit is caused to electrical network
Frequency fluctuation and voltage pulsation.These problems have had a strong impact on the security and economy of power 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 correlation technique and equipment both at home and abroad,
Prevent the wind energy turbine set that has built up fully cannot be discharged from playing benefit, wind energy turbine set production capacity well.
The key of wind farm grid-connected technology is studied, and is for wind energy turbine set electrical network analysis to be accessed as an integral unit, is led to
Crossing improves the voltage of wind farm grid-connected point, frequency stability, to improve the grid-connected performance of whole wind energy turbine set.This is needed by wind-powered electricity generation
Power controller realizing, including the active and voltage control of grid entry point.
The existing wind power control system of China includes wind energy turbine set monitoring (SCADA) system, active automatically controls
(AGC) system and voltage automatically control (AVC) system.AGC and AVC systems receive the active and voltage that dispatching of power netwoks is issued respectively
Control instruction, distributes the active and idle reference value of wind turbine, then is issued to each typhoon by wind energy turbine set monitoring (SCADA) system
Machine, by controlling the active and idle purpose for reaching control wind power of wind turbine.Due to SCADA system and blower fan it
Between communication cycle length (several seconds～tens of seconds), poor real, so control accuracy is relatively low.Additionally, said method is simply kept watch
Electric field is considered as an overall generator unit, due to the wind-resources situation difference of each seat in the plane in wind energy turbine set, actual motion
The each power of the assembling unit differ greatly, there is tired skewness；Also lack the differentiation for Various Seasonal condition
Process.
Wind power plant reactive power source mainly has two kinds：Blower fan and concentration reactive-load compensation equipment.Concentrate reactive-load compensation equipment, example
As static passive compensation device (SVC) and static reacance generator (SVG) are served actively to the reactive power equilibrium of wind energy turbine set
Effectively act on, but there is also cost height, the defect of big and stability difference is lost.And blower fan have additionally send reactive power
Ability, but single blower fan freely control can cause wind power plant reactive power in-fighting, it is impossible to reach specified control target.Wind energy turbine set
The coordination control of interior reactive power source is to improve Network Voltage Stability, while improving the key technology of wind energy turbine set economy.
In recent years, wind energy turbine set is assisted to participate in the pass that system frequency adjustment has also obtained Many researchers using energy-storage system
Note.Using energy-storage system have super conductive magnetic storage energy, flywheel energy storage etc. dissimilar.But due to high cost, and technology is still
Immature, also it is difficult to extensively application.For the research of wind-powered electricity generation frequency modulation is concentrated at present in the frequency modulation control of single unit, including adopting
With virtual inertia control, hypervelocity control and pitch control etc., also lack the system control strategy from wind energy turbine set control plane.
Content of the invention
It is an object of the invention to overcoming the poor real of existing wind energy turbine set control technology presence, precision low, do not possess tune
Frequency ability, the shortcoming of tired skewness, proposes a kind of wind power controller (WPPC) and blower fan between.
Wind power controller of the present invention is supervised with a wind-powered electricity generation group of planes, reactive power compensator, booster stations in booster stations
Control system, wind energy turbine set monitoring (SCADA) system and main website of control centre composition wind power Control System NetWork；Wind energy turbine set work(
Rate controller receives scheduling station system or the active and voltage control instructions for locally issuing by communication modes, 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 step that control centre regulates and controls to wind field, can strengthen electrical network to wind-powered electricity generation
Digestion capability.
Wind power controller of the present invention include central processing unit, power module, electrical network detection module, communication module,
Exception processing module, active power and frequency control module and reactive power/voltage control module.
Described power module is used for providing alternating current-direct current two-way power supply for the present invention；
Described electrical network detection module is used for measuring the electric network information of wind farm grid-connected point includes high voltage bus voltage, frequently
Rate, active output and idle output；
Described communication module is used 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 of control centre, for transmitting control signal and key feedback data, leads to
News delays time to control is within 100ms.
Described central processing unit is by obtaining electrical network detection module, the electric network information that communication module is collected and each
The information of miscellaneous equipment in blower fan, reactive power compensator and wind energy turbine set, in conjunction with dispatch command, respectively through active power and frequency control mould
Block and reactive power/voltage control module, send the active and idle control instruction of dynamic, then by communication module send to wind turbine with
Reactive power compensator, realizes the active and idle quick regulation of wind energy turbine set.
Described exception processing module is used for the alarm for providing all kinds of exceptions or failure, and exception or failure include communication event
Barrier, device exception, electric network fault, system operation exception etc..Described exception processing module can automatic blocking, stop distribution knot
Fruit exports, and proceeds to automatically local control, and forms logout.
Described active power and frequency control module is used for continuously adjusting for active power of wind power field, realizes frequency stable.Specifically
Target includes：1) ensure under winter mode that every unit output is tried one's best balanced, it is to avoid shut 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 ensureing that whole wind energy turbine set unit stops
Machine number of times is balanced；3) ensure that each power of the assembling unit control targe value is as impartial as possible under wind regime enabled condition, balanced wind turbine
The fatigue of group；4) when mains frequency changes wind energy turbine set can increase automatically or reduce active exert oneself, provide for electrical network
Primary frequency modulation is acted on；5) electrical network is met to the wind energy turbine set active rate of change restriction of 1 minute and 10 minutes.
What active power of wind power field of the present invention was controlled comprises the following steps that：
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 active setting value P of wind energy turbine set at current time 'set；
Step 1-2：Calculate active setting value P of wind energy turbine set 'setWith wind energy turbine set actual value P0Power deviation △ P, power is inclined
Difference △ P should meet requirement of the electrical network to the active rate of change of wind energy turbine set 1 minute and 10 minutes rates of change；
Step 1-3：Calculate power margin γpCharacterize the potential capacity of current wind energy turbine set；
Step 1-4：According to the power margin value that different Seasonal Models and step 1-3 are calculated, start and stop control is carried out；
Step 1-5：The distribution of work is carried out by active dispensing controller to a wind-powered electricity generation group of planes, active dispensing controller includes
Sub-controller and balance controller two parts.
Described reactive power/voltage control module is used for continuously adjusting for wind power plant reactive power, realizes voltage stabilization.Specifically
Target includes：1) wind energy turbine set exit potential balance is maintained；2) coordinate multiple reactive power sources in wind energy turbine set, make full use of blower fan itself
Send idle；3) optimize reactive power distribution in wind energy turbine set, reduce loss of wind farm；4) all kinds of security constraints are met, including height
Pressure side bus voltage is out-of-limit, and active reactive is out-of-limit, main transformer electric current is out-of-limit, limit etc. that blower fan is idle.
Wind power plant reactive power control of the present invention is comprised the following steps that：
Step 2-1：With wind farm grid-connected point voltage or idle as control targe, using PI closed loop regulative modes, and pass through
After security constraint, wind power plant reactive power setting value Q is obtainedref.Described 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 fan is idle.
Step 2-2：When wind power plant reactive power setting value QrefDuring limit sum idle less than controllable unit in wind energy turbine set,
Wind power controller carries out each unit without the distribution of work, otherwise execution step 2-3 by constant power factor；
Step 2-3：If wind power plant reactive power setting value QrefMore than the idle limit sum of controllable unit in wind energy turbine set,
But when being no more than whole audience reactive power source sum, Wind turbines carry out reactive-load compensation by maximum idle exerting oneself, and unnecessary idle portion
Point will distribute to reactive power compensator compensates, otherwise execution step 2-4；
Step 2-4：If wind power plant reactive power setting value QrefMore than whole reactive power source sums, i.e. wind in wind energy turbine set
The idle active volume of group of motors and reactive power compensator be not enough to support wind energy turbine set 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 Cortrol.
The present invention is had the advantage that compared with prior art：
Compared with prior art, present invention achieves wind energy turbine set closed-loop control, solves large-scale wind power Webweb source
The technical barrier of coordination, improves the controllability of wind energy turbine set, and there is practical value to the exploitation of electrical network friendly Intelligent wind power field；With
When, solve the problems, such as the communication delay in traditional wind power control；Can replace that wind energy turbine set is active to automatically control (AGC) system
System and voltage automatically control (AVC) system.
The wind power controller that the present invention is provided, can fully discharge blower fan and additionally send reactive power and active standby
Ability, reduces reactive power compensator, the construction investment of energy-storage system and running wastage, and dynamic and accurately real
The voltage of existing wind energy turbine set PCC point, frequency stable control, make that wind energy turbine set is active, reactive power reaches more preferable dynamic equilibrium, improve
Wind farm grid-connected performance.
Description of the drawings
Fig. 1 wind power controller architecture block diagrams；
Fig. 2 wind power Control System NetWork structures；
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 has distribution of work control block diagram for wind energy turbine set；
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, electrical network detection module,
Communication module, exception processing module, active power and frequency control module and reactive power/voltage control module.Described central processing unit difference
With power module, electrical network detection module, communication module, exception processing module, active power and frequency control module and reactive power/voltage control
Module connects.
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 of control centre composition wind power Control System NetWork.Fig. 2 show wind power
Control System NetWork structure.Described wind power controller is arranged near wind field booster stations.Wind power controller
Busbar voltage, frequency, active output and the idle output for measuring wind farm grid-connected point is needed, in conjunction with the steady of mains frequency and voltage
Qualitative requirement, sends the active control signal with dynamic reactive of dynamic, and control signal is delivered to wind by high-speed field bus
Motor group, reactive power compensator and booster stations monitoring system, realize the active and idle quick regulation of wind energy turbine set.
Wind power controller is communicated using TCP/IP network modes with electric power dispatching system, and communication protocol is based on
IEC870-5-104 Telecontrol Protocols (hereinafter referred to as 104 stipulations).Wind power controller is constantly in as substation intercepts shape
State, waits main website connection request.Sent by main website end and set up after connection request TCP connections, then started transmission data, above send week
Phase property scan data simultaneously receives the various command messages of main website.
The operation information of wind power controller Real-time Collection each unit, and issue for each unit active/
Idle control instruction, wind power controller are communicated using Modbus-TCP agreements with fan master control system.
The operation information of wind power controller Real-time Collection reactive power compensator, and issue for each reactive-load compensation
The control instruction of device.Reactive power compensator includes static passive compensation device (SVC) and static reacance generator (SVG).Wind
Electric field power controller is communicated by Ethernet or serial mode with reactive power compensator, communication protocol using Modbus or
104 stipulations.
Wind power controller and booster stations monitoring system real-time Communication for Power, need the data of collection to include booster stations main transformer
The real time datas such as tap, each the active, idle of bar collection electric line, voltage and electric current, and the guidance command of tap is issued, by
Which responds and executes.Communication adopts ether net mode, and communication protocol is using Modbus or 104 stipulations.
Active for the wind energy turbine set information that automatically controls with voltage of automatically controlling also is uploaded to wind-powered electricity generation by wind power controller
Field monitoring (SCADA) system carries out data display and storage.Communicated by ether net mode, communication protocol adopts Modbus-TCP
Agreement.
Wind power controller provides the alarm function of all kinds of exceptions or failure, exception or failure include communication failure,
Device exception, such as power supply trouble, PLC are restarted etc., electric network fault, system operation are abnormal etc..Can automatic blocking, stop distribution knot
Fruit exports, and proceeds to automatically local control, and forms logout, and locking flow process is as shown in Figure 3.
The present invention is comprised the following steps that to active power of wind power field control：
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 active setting value P of wind energy turbine set at current time 'set.Wind-powered electricity generation field frequencies range-active response curve is illustrated in figure 4,
In figure, the active preset value calculation method of each section of wind energy turbine set is as follows：
1) when system frequency is in FREQUENCY CONTROL dead zone range, active the exerting oneself of wind energy turbine set is set as B-C section curves, should be pre-
The spare capacity of d% under current wind speed is stayed, 10% is generally can use.Active setting value P of wind energy turbine set 'setAs shown in formula (1)；
P′set=Min (Pset,Pava(1-d%)) (1)
2), when below the frequency corresponding to system frequency drops to B points, wind energy turbine set should follow the decline curve of section A-B
To make under active exert oneself increase and at most releasable current wind speed 100% available horsepower, the active setting value of wind energy turbine set 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 the frequency corresponding to system frequency rises to C points, wind energy turbine set should be come along the decline curve of C-D sections
Reduce active exert oneself and at least releasable current wind speed under 20% available horsepower, active setting value P of wind energy turbine set 'setComputational methods
Ibid, as shown in formula (2)；
4) when the frequency corresponding to system frequency continuously rises to D points, wind energy turbine set is out of service；
P′set=0 (3)
In above-mentioned curve, each parameter need to be set according to the specific requirement of local power system, the span such as following table of parameter
Shown：
| Frequency (Hz) | Active percentage of exerting oneself (%) | |
| 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：Calculate active setting value P of the whole audience 'setWith actual value P0Deviation △ P, △ P should meet electrical network to wind
The active rate of change of electric field 1 minute and the requirement of 10 minutes rates of change.According to GB/T 19963-2011《Wind energy turbine set accesses power train
System technical stipulation》, under normal operation, 10 minutes active power of wind energy turbine set changes threshold limit value for installed capacity/3, minute 1
Active power change threshold limit value is installed capacity/10.
Step 1-3：Calculate the power margin γ of wind energy turbine setp, definition：
In above formula：PavaJ () can be sent out active for the theory of jth platform unit, calculated according to actual wind speed power curve, Prate
(j) be i-th unit theory can generated output, P0J () is that the reality of jth platform unit is active, M is the whole unit numbers of wind energy turbine set
Amount.
Step 1-4：According to the power margin value that different Seasonal Models and step 1-3 are calculated, start and stop control is carried out.
As it was previously stated, the control targe of winter mode is to ensure to shut down minimum number, each unit output because of active power dispatch
As far as possible balanced, winter mode flow chart is as shown in Figure 5；
As it was previously stated, the control targe of summer mode is under the conditions of enough power margins are ensured, ensure operation as far as possible
Unit minimum number, and the unit output for running is balanced.Summer mode algorithm flow chart is as shown in Figure 6.
Start and stop control concrete grammar is as follows：
1) control program is selected to enter winter mode or summer mode according to current environmental temperature or month first；
2) determine and shut down queue and open fleet row, it is to open according to currently all grid-connected unit the last times wherein to shut down queue
The arrangement from front to back of the time of machine, opens fleet and is classified as according to currently all times for shutting down the last shutdown of unit from forward direction
Arrangement afterwards；
3) winter mode shutdown control logic is as follows：
When power margin >=0.5 of wind energy turbine set, continue in 10 minutes, and 10 minutes no shutdown instruction and issue, then according to
The order for shutting down queue carries out compressor emergency shutdown judgement successively；If the i-th # platforms unit allows shutdown operation, and the unit reality
Power≤50kW continues 10 minutes, then execute shutdown operation；
4) to open machine control logic as follows for winter mode：
As the power margin ＜ 0.2 of wind energy turbine set, continue 1 minute, or actual power ＜ setting power continues 1 minute, and 1
Without enabled instruction in minute, then unit is carried out successively according to the order for opening fleet row and open machine judgement；If jth # platform unit meets
Unit starting condition, then execute and open machine operation；
5) summer mode shutdown control logic is as follows：
When power margin >=0.2 of wind energy turbine set, continue in 10 minutes, and 10 minutes no shutdown instruction and issue, then according to
The order for shutting down queue carries out compressor emergency shutdown judgement successively；If the i-th # platforms unit allows shutdown operation, shutdown operation is executed；
6) to open machine control logic as follows for summer mode：
As the power margin ＜ 0.05 of wind energy turbine set, continue 1 minute, or actual power ＜ setting power continues 1 minute, and
Without enabled instruction in 1 minute, then unit is carried out successively according to the order for opening fleet row and open machine judgement；If jth # platform unit meets
Unit starting condition, then execute and open machine operation；
7) no matter winter or summer mode, each controlling cycle only allow a unit to open machine or shutdown operation；
Step 1-5：Included to having carried out the distribution of work, active dispensing controller 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 for respectively controlling is to have carried out the distribution of work according to identical change amount to each unit.Divide equally active
In controller, it is that current power adds side-play amount that every unit gives power, and the side-play amount adopts Principle of Average Allocation, every machine
Group is identical, and side-play amount is：
Δ P (j)=(P 'set-P0)/N (5)
In above formula, Δ P (j) is the power offset of jth platform unit, P 'setThe active setting of wind energy turbine set for dispatching down distributing
Value, P0For the total active output of current wind energy turbine set, number of units of the N for the controllable unit of wind energy turbine set.
Then the jth platform unit reference power of equalization controller output is：
Pref(j)=P0(j)+ΔP(j) (6)
In above formula, P0J () is the active output of jth platform unit, PrefJ () is the active reference value of equalization controller output.
The target of Balance route is the active setting value of each unit to be compensated according to the principle of power equalization, makes each
Unit fatigue is uniformly distributed.
The output P of balance controllereqJ () is：
In formula, K be balance controller coefficient, PeqJ () is the active offset of balance controller output, N can for wind energy turbine set
The number of units of control unit；
The setting power P ' of final jth platform unitrefJ () is：
P’ref(j)=Pref(j)+Peq(j) (8)
Due to balance controller outputFor 0, the power excursion sum of each unit is therefore assigned to still etc.
In Pset-P0.
The present invention is to reactive-power control method of wind power field as shown in figure 8, comprising the following steps that：
Step 2-1：With wind farm grid-connected point voltage or idle as control targe, using PI closed loop regulative modes, 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, have
Work(reactive power constraints, main transformer electric current are out-of-limit, limit etc. that blower fan is idle.
Step 2-2：If wind power plant reactive power setting value QrefLess than the idle limit sum of controllable unit in wind energy turbine set
When, wind power controller carries out each unit without the distribution of work by constant power factor, and concrete allocative decision is as follows：
Assume there are M bar feeder lines 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 the feeder lineloss(i), then total idle reference value Q of the feeder line institute wind-connectorlineI () is：
In above formula, as feeder current I (i) can be obtained by measurement, the therefore circuit reactive loss Q of i-th feeder lineloss
I () is：
Qloss(i)=I2(i)X(i) (10)
If i-th feeder line has M platform units, then idle setting value Q of m platforms unitrefM () is：
On i-th feeder line, the reference power factor of all units is：
Step 2-3：If wind power plant reactive power setting value QrefMore than the idle limit sum of controllable unit in wind energy turbine set,
But when being no more than whole audience reactive power source sum, unit carries out reactive-load compensation by maximum idle exerting oneself, and unnecessary reactive component will
Distribute to reactive power compensator to compensate.
Wherein, Qmax(j) be the idle higher limit of jth platform unit, QwtFor the maximum idle output valve of all units in wind energy turbine set it
With QsvgIdle output valve for reactive power compensator.
Step 2-4：If wind power plant reactive power setting value QrefMore than whole reactive power source sums in wind energy turbine set, i.e., without
The idle active volume of Reactive power compensation installations and Wind turbines be not enough to support wind energy turbine set exit potential in normal operation range, wind
Electric field power controller issues load tap changer notch command to booster stations monitoring system, is entered by adjusting load tap changer
Row Voltage Cortrol.
Claims (8)
1. a kind of wind power controller, it is characterised in that：Described wind power controller includes central processing unit, electricity
Source module, electrical network detection module, communication module, exception processing module, active power and frequency control module and reactive power/voltage control module；
Described central processing unit respectively with power module, electrical network detection module, communication module, exception processing module, active frequency control
Molding block and the connection of reactive power/voltage control module；
Wind power controller is arranged in booster stations, with a wind-powered electricity generation group of planes, reactive power compensator, booster stations monitoring system, wind
Electric field monitoring (SCADA) system and main website of control centre composition wind power Control System NetWork；Wind power controller
Scheduling station system or the active and voltage control instructions for locally issuing are received by communication modes, to a wind-powered electricity generation group of planes, idle benefit
Repay device and load tap changer gear is uniformly coordinated control, carry out active power and reactive power is adjusted, realize frequency and electricity
Pressure stability contorting.
2. according to the wind power controller described in claim 1, it is characterised in that：Described electrical network detection module is used for surveying
The electric network information of wind farm grid-connected point is measured, including high voltage bus voltage, frequency, active output and idle output；
Described communication module is used for realizing wind power controller with a wind-powered electricity generation group of planes, reactive power compensator, booster stations monitoring
The real-time communication of system, wind energy turbine set monitoring (SCADA) system and main website of control centre, for transmitting control signal and key feedback
Data；
Described central processing unit is by obtaining electrical network detection module, the electric network information that communication module is collected and wind turbine
The information of miscellaneous equipment in group, reactive power compensator and wind energy turbine set, in conjunction with dispatch command, respectively through active power and frequency control module
With reactive power/voltage control module, the active and idle control instruction of dynamic is sent, then is sent to a wind-powered electricity generation group of planes and nothing by communication module
Reactive power compensation installations, realize the active and idle quick regulation of wind energy turbine set；
Described exception processing module is used for the alarm for providing all kinds of exceptions or failure, and exception or failure include communication failure, dress
Put exception, electric network fault, system operation exception；Described exception processing module can automatic blocking, stop allocation result output,
Local control is proceeded to automatically and, and form logout；
Described active power and frequency control module and reactive power/voltage control module are used for the active closed-loop control with voltage of wind energy turbine set.
3. according to the wind power controller described in claim 1 or 2, it is characterised in that：Described active power and frequency control mould
Block is comprised the following steps that to active power of wind power field control：
Step 1-1：Power P can be sent out according to wind-powered electricity generation field theoryava, the active desired value that issues of frequency departure △ f and dispatching of power netwoks
Pset, calculate active setting value P of wind energy turbine set at current time 'set；
Step 1-2：Calculate active setting value P of wind energy turbine set 'setWith active actual value P of wind energy turbine set0Power deviation △ P, power deviation
△ P should meet requirement of the electrical network to the active rate of change of wind energy turbine set 1 minute and 10 minutes rates of change；
Step 1-3：Calculate power margin γpCharacterize the potential capacity of current wind energy turbine set；
Step 1-4：According to the power margin value that different Seasonal Models and step 1-3 are calculated, start and stop control is carried out；
Step 1-5：The distribution of work is carried out by active dispensing controller to a wind-powered electricity generation group of planes, active dispensing controller includes equal sub-control
Device processed and balance controller two parts.
4. according to the wind power controller described in claim 3, it is characterised in that：Described step 1-1 is according to wind energy turbine set
Theory can send out power Pava, active desired value P that issues of frequency departure △ f and dispatching of power netwoksset, calculate the wind energy turbine set at current time
Active setting value P 'setMethod as follows：
1) when frequency departure △ f are in dead zone range, wind energy turbine set should reserve the spare capacity of d% under current wind speed, and wind energy turbine set has
Work(setting value P 'setAs shown in formula (1)；
P′set=Min (Pset,Pava(1-d%)) (1)
2) as frequency departure △ f<0 and not in dead zone range, wind energy turbine set can increase automatically active exert oneself, and at most releasable
100% available horsepower, active setting value P of wind energy turbine set under current wind speed 'setAs shown in formula (2)；
P′set=Min (Pset,Pava-KfΔf) (2)
Wherein, KfFor active coefficient of frequency modulation；
3) as frequency departure △ f>0 and not in dead zone range constantly, wind energy turbine set can reduce automatically active exert oneself, and can at least release
Put under current wind speed 20% available horsepower, active setting value P of wind energy turbine set 'setComputational methods ibid, as shown in formula (2)；
4) as frequency departure △ f>0, and system frequency exceed electrical network allow peak frequency when, wind energy turbine set is out of service；
P′set=0 (3).
5. according to the wind power controller described in claim 3, it is characterised in that described step 1-3 calculates wind energy turbine set
Power margin γpMethod as follows：
Definition：
In above formula：PavaJ () can be sent out active for the theory of jth platform unit, calculated according to actual wind speed power curve, PrateJ () is
The theory of i-th unit can generated output, P0J () is that the reality of jth platform unit is active, M is the whole unit quantity of wind energy turbine set.
6. according to the wind power controller described in claim 3, it is characterised in that：Described step 1-4 carries out start and stop
Method as follows：
1) control program is selected to enter winter mode or summer mode according to current environmental temperature or month first；
2) determining and shutting down queue and open fleet row, it is machine to be opened according to currently all grid-connected unit the last times wherein to shut down queue
Time arrangement from front to back, opens fleet and is classified as and shut down unit the last times that shuts down from front to back according to currently all
Arrangement；
3) winter mode shutdown control logic is as follows：
When power margin >=0.5 of wind energy turbine set, continue no shutdown instruction in 10 minutes, and 10 minutes and issue, then according to shutdown
The order of queue carries out compressor emergency shutdown judgement successively；If the i-th # platforms unit allows shutdown operation, and the unit actual power
≤ 50kW continues 10 minutes, then execute shutdown operation；
4) to open machine control logic as follows for winter mode：
As the power margin ＜ 0.2 of wind energy turbine set, continue 1 minute, or actual power ＜ setting power continues 1 minute, and 1 minute
Interior without enabled instruction, then carry out unit successively according to the order for opening fleet row and open machine judgement；If jth # platform unit meets unit
Entry condition, then execute and open machine operation；
5) summer mode shutdown control logic is as follows：
When power margin >=0.2 of wind energy turbine set, continue no shutdown instruction in 10 minutes, and 10 minutes and issue, then according to shutdown
The order of queue carries out compressor emergency shutdown judgement successively；If the i-th # platforms unit allows shutdown operation, shutdown operation is executed；
6) to open machine control logic as follows for summer mode：
As the power margin ＜ 0.05 of wind energy turbine set, continue 1 minute, or actual power ＜ setting power continues 1 minute, and 1 point
Without enabled instruction in clock, then unit is carried out successively according to the order for opening fleet row and open machine judgement；If jth # platform unit meets machine
Group entry condition, then execute and open machine operation；
7) no matter winter or summer mode, each controlling cycle only allow a unit to open machine or shutdown operation；
The control targe of described winter mode is to ensure to shut down minimum number because of active power dispatch, and each unit output is as far as possible
Weighing apparatus, the control targe of described summer mode is under the conditions of enough power margins are ensured, ensures operating unit quantity as far as possible
Minimum, and the unit output for running is balanced.
7. according to the wind power controller described in claim 3, it is characterised in that：Described step 1-5 has distribution of work control
Device processed includes equalization controller and balance controller；The target of wherein equalization controller is to each unit according to identical change amount
The distribution of work is carried out；In equalization controller, it is that current power adds side-play amount that every unit gives power, and the side-play amount is adopted
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 energy turbine set of dispatching down distributing, P0It is to work as
The total active output of front wind energy turbine set, number of units of the N for the controllable unit of wind energy turbine set；
Equalization controller output jth platform unit reference power be：
Pref(j)=P0(j)+ΔP(j) (6)
P0J () is the active output of jth platform unit, PrefJ () is the active reference value of equalization controller output；
In described step 1-5, the target of balance controller is the active setting value of each unit to be entered according to the principle of power equalization
Row compensation, is uniformly distributed each unit fatigue；
The output P of balance controllereqJ () is：
In formula, K be balance controller coefficient, PeqJ () is the active correction value of balance controller output, N is the controllable machine of wind energy turbine set
The number of units of group；
The setting power P ' of final jth platform unitrefJ () is：
P’ref(j)=Pref(j)+Peq(j) (8)
Due to balance controller outputFor 0, be therefore assigned to the power excursion sum of each unit still equal to
Pset-P0.
8. according to the wind power controller described in claim 3, it is characterised in that：The step controlled by wind power plant reactive power
Rapid as follows：
Step 2-1：With wind farm grid-connected point voltage or idle as control targe, using PI closed loop regulative modes, and through safety
After constraint, wind power plant reactive power setting value Q is obtainedref；Described security constraints include high side bus voltage out-of-limit,
Active reactive is out-of-limit, main transformer electric current is out-of-limit and the idle limit of blower fan；
Step 2-2：When wind power plant reactive power setting value QrefDuring limit sum idle less than controllable unit in wind energy turbine set, wind-powered electricity generation
Field power controller carries out each unit without the distribution of work, otherwise execution step 2-3 by constant power factor；
Step 2-3：If wind power plant reactive power setting value QrefMore than the idle limit sum of controllable unit in wind energy turbine set, but
No more than the whole audience reactive power source sum when, Wind turbines carry out reactive-load compensation by maximum idle exerting oneself, and unnecessary reactive component will
Distribute to reactive power compensator to compensate, otherwise execution step 2-4；
Step 2-4：If wind power plant reactive power setting value QrefMore than whole reactive power source sums, i.e. wind turbine in wind energy turbine set
Group and reactive power compensator idle active volume be not enough to support wind energy turbine set exit potential in normal operation range, wind energy turbine set
Power controller issues load tap changer notch command to booster stations monitoring system, is entered by adjusting load tap changer gear
Row Voltage Cortrol.
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| CN113013913A (en) * | 2019-12-19 | 2021-06-22 | 新疆金风科技股份有限公司 | Wind power plant reactive voltage control system and method |
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