CN104901332B - A kind of control method of the low voltage ride through control system based on feather - Google Patents
A kind of control method of the low voltage ride through control system based on feather Download PDFInfo
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- CN104901332B CN104901332B CN201510222689.7A CN201510222689A CN104901332B CN 104901332 B CN104901332 B CN 104901332B CN 201510222689 A CN201510222689 A CN 201510222689A CN 104901332 B CN104901332 B CN 104901332B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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Abstract
A kind of control method of the low voltage ride through control system based on feather, its system consists of；Wind energy conversion system part includes air velocity transducer, wind wheel and pitch-variable system；Power generation part includes electromotor, multifunction instrument and electrical network；Hydraulic drive part includes the first torque and speed sensorses, dosing pump, pressure duct, the first check valve, the second check valve, the second overflow valve, slippage pump, repairing fuel tank, relief valve, flow transducer, rotational speed governor, variable displacement motor, power controller, the second torque and speed sensorses and low pressure line.Its control method is：When electrical grid failure leads to grid voltage sags, the input of system capacity is reduced from energy root, the principle coordinating energy is that variable displacement motor swinging angle control is preferential, dump energy in system is stored wind wheel, control the valve port opening of pitch-variable system proportional direction valve simultaneously, change the pivot angle of hydraulic motor, and then the propeller pitch angle of change blade, change the input of system capacity.
Description
Technical field
The invention belongs to technical field of wind power generation, it is related to the main transmission of hydraulic wind power generating set and becomes oar
Away from system, replace traditional drive system with hydraulic transmission equipment and hydraulic control system, particularly to a kind of based on change oar
Away from low voltage ride through control system control method.
Background technology
With increasingly sharpening of environment and energy problem, wind-power electricity generation is increasingly subject to concern both domestic and external, wind-power electricity generation
Industry also therefore develops rapidly.
Hydraulic wind power generating set as a kind of new wind power generation plant, using dosing pump-variable displacement motor enclosed
Hydraulic Power Transmission System, is effectively coordinated with excitation synchronous generator, compared with gear-box type and direct-drive aerogenerator group, this machine
Group significantly reduces nacelle weight, decreases the impact to electrical network, improves power generating quality.
As other wind-driven generators, hydraulic wind power generating set needs also exist for possessing low voltage ride-through capability, that is,
When electric network fault or disturbance cause the Voltage Drop of wind farm grid-connected point, in the range of certain voltage is fallen, Wind turbines
Can uninterruptedly be incorporated into the power networks.And provide certain reactive power to electrical network, and support power system restoration, until power system restoration is normal,
Thus " passing through " this low-voltage time (region).
China proposes 3 points of requirements to Wind turbines and its low voltage crossing process：1) Wind turbines should have grid-connected
Point voltage falls to the low voltage ride-through capability being able to maintain that the 729ms that is incorporated into the power networks during 24% rated voltage；2) wind farm grid-connected point
Can return in voltage 2s after falling rated voltage 100% when, Wind turbines should have and are uninterruptedly incorporated into the power networks
Ability；3) do not cut out the wind power generating set of electrical network during electric network fault, its active power should be with after failure removal
The power variation rate of at least 11% rated power/second recovers the state to fault.
At present, all there is the patented technology of correlation both at home and abroad, reflect to hydraulic low voltage cross-over of wind generator set control
A series of achievements in research that technology processed is carried out.
Described in European patent EP 28921210A1A, Norway ChapDrive company proposes a kind of hydraulic wind-power electricity generation
Unit low voltage ride through control system.This system is realized low-voltage by control variable motor pivot angle and flow-control valve opening and is worn
More.Therefore the method has variable displacement motor pivot angle and two control variable of flow-control valve opening, control more flexible, but the method
It is that unnecessary energy is converted into heat, there is certain energy loss, fundamentally unit energy is not regulated and controled,
Long-time energy loss can cause to whole equipment to damage.
University On The Mountain Of Swallows described in Chinese patent CN1148810984A proposes a kind of bivariant hydraulic wind-driven generator
Group low voltage traversing control method.When grid voltage sags, the method passes through rotational speed governor control variable motor pivot angle, work(
Rate controller controls ratio throttle valve opening, finally realizes low voltage crossing.The method equally exists variable displacement motor pivot angle and ratio
Example two control variable of choke valve, control flexibly, but the method are still excess energy to be converted into heat energy, not fundamentally
Reduce the input of energy, whole equipment being caused for a long time to damage, simultaneously because being mounted with choke valve on pressure duct, depositing
In certain energy loss.
University On The Mountain Of Swallows described in Chinese patent CN11547210710A proposes a kind of low electricity of hydraulic wind power generating set
Pressure passes through control system and method, and this system is to realize low electricity by variable displacement motor pivot angle and two variables of pump-motor pivot angle
Pressure is passed through.The method implements reasonable distribution and storage to hydraulic system dump energy, but does not enter energy from source
Row real-time monitoring.
In sum, existing hydraulic low voltage traversing control method of wind generator set mostly in control process not
From root, energy can be carried out real-time monitoring.For overcoming above-mentioned technological deficiency, need a kind of new hydraulic pressure of offer badly
Type low voltage traversing control method of wind generator set.
Content of the invention
For above-mentioned technological deficiency, problem to be solved by this invention is to provide a kind of hydraulic pressure based on feather
Type low voltage cross-over of wind generator set control system control method, leads to during grid voltage sags pair for electrical grid failure
Unit is controlled.This control method possesses the high advantage of conventional hydraulic type wind power generating set ensuring smooth transmission, reliability, can essence
Really realize real-time pitch control during low voltage crossing for the blower fan, from source, unit energy is regulated and controled, solve
Energy residual problem present in low voltage crossing process.
Realize goal of the invention in order to solve above-mentioned technical problem, the present invention is to be achieved through the following technical solutions
's：
A kind of low voltage ride through control system based on feather, this system is mainly made up of three parts：Wind energy conversion system part,
Hydraulic drive part and power generation part, wind energy conversion system part is connected with hydraulic drive part coaxial rigid, hydraulic drive part with send out
Electric part coaxial rigid connects；
Described wind energy conversion system partly mainly includes air velocity transducer 1, wind wheel 2 and pitch-variable system；
Described pitch-variable system includes angular displacement sensor 22, ring gear 23, little gear 24, hydraulic motor 25, ratio
Direction valve 26, the first overflow valve 27, variable pump 28 and the first fuel tank 29；The inlet port of wherein variable pump 28 is inhaled from the first fuel tank 29
Oil, the force feed mouth of variable pump 28 connects the oil-in of the first overflow valve 27 and the P mouth of proportional direction valve 26, proportional direction valve respectively
26 oil-out A and B connect two hydraulic fluid ports of hydraulic motor 25 respectively, proportional direction valve 26 is connected with power controller 17,
And by the latter's output control signal, control the valve port opening of proportional direction valve 26, hydraulic motor 25 is coaxially connected with little gear 24,
Little gear 24 is engaged with ring gear 23, and the wheel hub of ring gear 23 and wind wheel 2 collectively forms bearing, and wind wheel 2 blade is pacified by bolt
Be contained on ring gear 23, two panels blade installed by the wheel hub of wind wheel 2, and little gear 24 and angular displacement sensor 22 be arranged on
On the steel plate the same face of wheel hub consolidation；
Described power generation part includes electromotor 19, multifunction instrument 20 and electrical network 21；
It is unidirectional that described hydraulic drive part includes the first torque and speed sensorses 4, dosing pump 5, pressure duct 6, first
Valve 7, the second check valve 8, the second overflow valve 9, slippage pump 10, repairing fuel tank 11, relief valve 12, flow transducer 13, rotating speed control
Device 14 processed, variable displacement motor 15, power controller 17, the second torque and speed sensorses 16 and low pressure line 30；
Wind wheel 2 nearby installs air velocity transducer 1, and it is coaxially connected with dosing pump 5 main shaft that wind wheel 2 passes through the first power transmission shaft 3；The
One torque and speed sensorses 4 are arranged on the power transmission shaft 3 connecting wind wheel 2 and dosing pump 5 main shaft；The oil-in of dosing pump 5 is from low
Pressure pipe road 30 oil suction, the force feed mouth of dosing pump 5 exports hydraulic oil by pressure duct 6, and setting flow passes on pressure duct 6
Sensor 13；Relief valve 12 is connected across between pressure duct 6 and low pressure line 30；The inlet port of variable displacement motor 15 and pressure duct 6
It is connected, the oil drain out of variable displacement motor 15 is connected with low pressure line 30；It is coaxial that the main shaft of variable displacement motor 15 passes through second driving shaft 18
Connect the main shaft of electromotor 19, variable displacement motor 15 Driven by Coaxial electromotor 19 generates electricity, input electric energy to electrical network 21, in electromotor 19
Multifunction instrument 20 is installed and electrical network 21 between；Second torque and speed sensorses 16 be arranged on link variable motor 15 main shaft and
On the second driving shaft 18 of electromotor 19 main shaft；Slippage pump 10 inlet port is connected with repairing fuel tank 11, and slippage pump 10 force feed mouth divides
Do not connect the first check valve 7 and one end of the second check valve 8, the other end of the first check valve 7 is connected to pressure duct 6, second
The other end of check valve 8 is connected to low pressure line 30；Second overflow valve 9 be connected across slippage pump 10 force feed mouth and repairing fuel tank 11 it
Between；Power controller 17 input connects the first torque and speed sensorses 4, the second torque and speed sensorses 16, multi-functional respectively
The angular displacement sensor 22 of instrument 20, air velocity transducer 1 and pitch-variable system；Power controller 17 outfan connects feather system
The proportional direction valve 26 of system；Rotational speed governor 14 input connection traffic sensor 13, the second torque and speed sensorses 16 respectively
With multifunction instrument 20, rotational speed governor 14 outfan link variable motor 15.
A kind of control method of described low voltage ride through control system based on feather, leads to electricity in electrical grid failure
The input of system capacity, during net Voltage Drop, is reduced from energy root, the principle coordinating energy is variable displacement motor swinging angle control
Preferentially, the dump energy in system is stored wind wheel, control the valve port opening of pitch-variable system proportional direction valve simultaneously, change
The pivot angle of hydraulic motor, and then change the propeller pitch angle of blade, change the input of system capacity.Its concrete steps includes following interior
Hold：
When electrical network 21 Voltage Drop, because low-voltage process is extremely short, therefore first pass through rotational speed governor 14 and control
Variable displacement motor 15 pivot angle：Rotational speed governor 14 gathers the rotating speed of variable displacement motor 15, flow by the second torque and speed sensorses 16
Sensor 13 gathers the flow of pressure duct 6, and multifunction instrument 20 collection electrical network 21 frequency and voltage, and then rotating speed controls
Device 14 output control signal, to variable displacement motor 15, is realized variable displacement motor 15 swinging angle control is increased with the discharge capacity of variable displacement motor 15, is made
The oil pressure of the hydraulic oil in hydraulic drive partial high pressure pipeline 6 reduces rapidly, thus increasing the rotating speed of dosing pump 5, will be remained with this
Complementary energy is converted into the kinetic energy of wind wheel 2, this control process ensure electrical network 21 not off-grid, make system speed stabilizing export it is ensured that unit just
Often run；Pitch-variable system operating is controlled by power controller 17 simultaneously：First, power controller 17 passes through air velocity transducer
1 collection wind speed, the first torque and speed sensorses 4 gather wind speed round, gather electromotor 19 output work by multifunction instrument 20
Rate and line voltage, gather the propeller pitch angle of wind wheel 2 blade by angular displacement sensor 22；Then, power controller 17 output control
Signal processed, to the proportional direction valve 26 of pitch-variable system, makes the valve port opening of proportional direction valve 26 reduce, and then makes entrance hydraulic pressure
The flow of motor 25 reduces, and hydraulic motor 25 is connected with little gear 24 coaxial rigid, and little gear 24 is engaged with ring gear 23, therefore
Reducing the propeller pitch angle of wind wheel 2 blade, thus reducing the energy input of whole system, remaining energy being eliminated simultaneously；
After failure removal, power controller 17 controls pitch-variable system operating：First, power controller 17 passes through wind speed
Sensor 1 gathers wind speed, and the first torque and speed sensorses 4 gather wind wheel 2 rotating speed, gathers electromotor 19 by multifunction instrument 20
Output and electrical network 21 voltage, angular displacement sensor 22 gathers the blade pitch angle of wind wheel 2；Then, power controller 17 is defeated
Go out control signal to pitch-variable system proportional direction valve 26, so that the valve port opening of proportional direction valve 26 is increased, and then make entrance liquid
The flow of pressure motor 25 increases, and hydraulic motor 25 is connected with little gear 24 coaxial rigid, and little gear 24 is engaged with ring gear 23, because
This increases the propeller pitch angle of wind wheel 2 blade, thus increasing the energy input of whole system, makes electromotor 19 active power with least
The power variation rate injection electrical network 21 of 11% rated power/second, supports electrical network 21 to recover the state to fault.
Due to adopting technique scheme, the present invention compared with prior art has the advantages that：
1st, the present invention has two control variable, the respectively valve port opening of the proportional direction valve of pitch-variable system and quantitation
The variable displacement motor pivot angle of pump-variable displacement motor drive system, both are mutually coordinated, so that low voltage crossing is controlled more flexible, simultaneously
Guarantee the rapidity in control process and reliability；
2nd, the present invention during low voltage crossing, can be adjusted in real time to the energy of input in system by pitch-variable system
Control, solves the problems, such as system spare energy, it is to avoid unnecessary energy has the damage to system for a long time.
The present invention can solve the problems, such as system spare energy by pitch-variable system, coordinates energy, effectively from root
Avoid the problem that dump energy is processed during low voltage crossing.
Brief description
Fig. 1 represents hydraulic principle and the hardware configuration system figure of the present invention；
Fig. 2 represents the control system schematic diagram of the present invention；
Fig. 3 represents the structural representation of the pitch-variable system of the present invention；
Fig. 4 represents the workflow diagram of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in further detail：A kind of low voltage crossing based on feather controls system
System, as shown in Figure 1 and Figure 2, this system is mainly by three part groups for its hydraulic principle and hardware configuration system figure and control system principle
Become：Wind energy conversion system part, hydraulic drive part and power generation part, wind energy conversion system part is connected with hydraulic drive part coaxial rigid, liquid
Pressure running part is connected with power generation part coaxial rigid；
Described wind energy conversion system partly mainly includes air velocity transducer 1, wind wheel 2 and pitch-variable system；
Described pitch-variable system, its structural representation as shown in figure 3, it include angular displacement sensor 22, ring gear 23,
Little gear 24, hydraulic motor 25, proportional direction valve 26, the first overflow valve 27, variable pump 28 and the first fuel tank 29；Wherein variable pump
From the first fuel tank 29 oil suction, the force feed mouth of variable pump 28 connects oil-in and the ratio of the first overflow valve 27 to 28 inlet port respectively
The P mouth of direction valve 26,26 oil-out A and B of proportional direction valve connects two hydraulic fluid ports of hydraulic motor 25, proportion directional respectively
Valve 26 is connected with power controller 17, and by the latter's output control signal, controls the valve port opening of proportional direction valve 26, hydraulic pressure horse
Reach 25 coaxially connected with little gear 24, little gear 24 is engaged with ring gear 23, and the wheel hub of ring gear 23 and wind wheel 2 collectively forms axle
Hold, wind wheel 2 blade is arranged on ring gear 23 by bolt, two panels blade installed by the wheel hub of wind wheel 2, and little gear 24 with
Angular displacement sensor 22 is arranged on the steel plate the same face being consolidated with wheel hub；
Described power generation part includes electromotor 19, multifunction instrument 20 and electrical network 21；
It is unidirectional that described hydraulic drive part includes the first torque and speed sensorses 4, dosing pump 5, pressure duct 6, first
Valve 7, the second check valve 8, the second overflow valve 9, slippage pump 10, repairing fuel tank 11, relief valve 12, flow transducer 13, rotating speed control
Device 14 processed, variable displacement motor 15, power controller 17, the second torque and speed sensorses 16 and low pressure line 30；
Wind wheel 2 nearby installs air velocity transducer 1, and it is coaxially connected with dosing pump 5 main shaft that wind wheel 2 passes through the first power transmission shaft 3；The
One torque and speed sensorses 4 are arranged on the power transmission shaft 3 connecting wind wheel 2 and dosing pump 5 main shaft；The oil-in of dosing pump 5 is from low
Pressure pipe road 30 oil suction, the force feed mouth of dosing pump 5 exports hydraulic oil by pressure duct 6, and setting flow passes on pressure duct 6
Sensor 13；Relief valve 12 is connected across between pressure duct 6 and low pressure line 30；The inlet port of variable displacement motor 15 and pressure duct 6
It is connected, the oil drain out of variable displacement motor 15 is connected with low pressure line 30；It is coaxial that the main shaft of variable displacement motor 15 passes through second driving shaft 18
Connect the main shaft of electromotor 19, variable displacement motor 15 Driven by Coaxial electromotor 19 generates electricity, input electric energy to electrical network 21, in electromotor 19
Multifunction instrument 20 is installed and electrical network 21 between；Second torque and speed sensorses 16 be arranged on link variable motor 15 main shaft and
On the second driving shaft 18 of electromotor 19 main shaft；Slippage pump 10 inlet port is connected with repairing fuel tank 11, and slippage pump 10 force feed mouth divides
Do not connect the first check valve 7 and one end of the second check valve 8, the other end of the first check valve 7 is connected to pressure duct 6, second
The other end of check valve 8 is connected to low pressure line 30；Second overflow valve 9 be connected across slippage pump 10 force feed mouth and repairing fuel tank 11 it
Between；Power controller 17 input connects the first torque and speed sensorses 4, the second torque and speed sensorses 16, multi-functional respectively
The angular displacement sensor 22 of instrument 20, air velocity transducer 1 and pitch-variable system；Power controller 17 outfan connects feather system
The proportional direction valve 26 of system；Rotational speed governor 14 input connection traffic sensor 13, the second torque and speed sensorses 16 respectively
With multifunction instrument 20, rotational speed governor 14 outfan link variable motor 15.
A kind of control method of described low voltage ride through control system based on feather, the method includes herein below：
When electrical network 21 Voltage Drop, because low-voltage process is extremely short, therefore first pass through rotational speed governor 14 and control
Variable displacement motor 15 pivot angle：Rotational speed governor 14 gathers the rotating speed of variable displacement motor 15, flow by the second torque and speed sensorses 16
Sensor 13 gathers the flow of pressure duct 6, and multifunction instrument 20 collection electrical network 21 frequency and voltage, and then rotating speed controls
Device 14 output control signal, to variable displacement motor 15, is realized variable displacement motor 15 swinging angle control is increased with the discharge capacity of variable displacement motor 15, is made
The oil pressure of the hydraulic oil in hydraulic drive partial high pressure pipeline 6 reduces rapidly, thus increasing the rotating speed of dosing pump 5, will be remained with this
Complementary energy is converted into the kinetic energy of wind wheel 2, this control process ensure electrical network 21 not off-grid, make system speed stabilizing export it is ensured that unit just
Often run；Pitch-variable system operating is controlled by power controller 17 simultaneously：First, power controller 17 passes through air velocity transducer
1 collection wind speed, the first torque and speed sensorses 4 gather wind speed round, gather electromotor 19 output work by multifunction instrument 20
Rate and line voltage, gather the propeller pitch angle of wind wheel 2 blade by angular displacement sensor 22；Then, power controller 17 output control
Signal processed, to the proportional direction valve 26 of pitch-variable system, makes the valve port opening of proportional direction valve 26 reduce, and then makes entrance hydraulic pressure
The flow of motor 25 reduces, and hydraulic motor 25 is connected with little gear 24 coaxial rigid, and little gear 24 is engaged with ring gear 23, therefore
Reducing the propeller pitch angle of wind wheel 2 blade, thus reducing the energy input of whole system, remaining energy being eliminated simultaneously；
After failure removal, power controller 17 controls pitch-variable system operating：First, power controller 17 passes through wind speed
Sensor 1 gathers wind speed, and the first torque and speed sensorses 4 gather wind wheel 2 rotating speed, gathers electromotor 19 by multifunction instrument 20
Output and electrical network 21 voltage, angular displacement sensor 22 gathers the blade pitch angle of wind wheel 2；Then, power controller 17 is defeated
Go out control signal to pitch-variable system proportional direction valve 26, so that the valve port opening of proportional direction valve 26 is increased, and then make entrance liquid
The flow of pressure motor 25 increases, and hydraulic motor 25 is connected with little gear 24 coaxial rigid, and little gear 24 is engaged with ring gear 23, because
This increases the propeller pitch angle of wind wheel 2 blade, thus increasing the energy input of whole system, makes electromotor 19 active power with least
The power variation rate injection electrical network 21 of 11% rated power/second, supports electrical network 21 to recover the state to fault.
The present invention comprises dosing pump-variable displacement motor speed control system and variable-pitch control system, and have two controlled
Variable processed：The hydraulic motor pivot angle of pitch-variable system and the variable displacement motor pivot angle of dosing pump-variable displacement motor drive system.
It is the workflow of the control method based on the low voltage ride through control system of feather for the kind of the present invention shown in Fig. 4
Figure.First, rotational speed governor 14 and power controller 17 pass through multifunction instrument 20 monitor in real time line voltage state, work as detection
When falling make electrical network 21 voltage be less than rated voltage 100% to any one phase voltage of electrical network 21, rotational speed governor 14 controls and becomes
Dump energy is stored wind wheel 2 by amount motor 15 pivot angle, and when wind wheel 2 storage energy reaches setting value, power controller 17 is controlled
The valve port opening of the proportional direction valve 26 of pitch-variable system processed reduces, and then reduces the propeller pitch angle of the blade of wind wheel 2, to reduce whole
The input of individual system capacity.
Secondly, whether power controller 17 detects the voltage of any one phase of three phase network in 2s by multifunction instrument 20
It is above the 100% of electrical network rated voltage.If it is, the valve port opening of scaling up direction valve 26, increase and enter hydraulic motor
25 flow, the pivot angle of the hydraulic motor 25 of pitch-variable system increases, and then increases the propeller pitch angle of the blade of wind wheel 2, makes generating
Machine 19 active power injects electrical network with the power variation rate of at least 11% rated power/second, supports power system restoration to fault
State, completes low voltage crossing；Otherwise, do not terminate in low voltage crossing 2s, illustrate that now electrical network 21 there occurs in the short time no
The fault that method is repaired, wind power generating set cuts out electrical network.
Protection scope of the present invention is defined by the claims.Those skilled in the art can be in the essence of the present invention and guarantor
In the range of shield, the present invention is made with various modifications or equivalent, this modification or equivalent also should be regarded as in the present invention
Protection domain in.
Claims (1)
1. a kind of control method of the low voltage ride through control system based on feather, the hydraulic wind-power electricity generation based on feather
Unit low voltage ride through control system is mainly made up of three parts：Wind energy conversion system part, hydraulic drive part and power generation part, wind-force
Machine part is connected with hydraulic drive part coaxial rigid, and hydraulic drive part is connected with power generation part coaxial rigid；
Described wind energy conversion system partly mainly includes air velocity transducer (1), wind wheel (2) and pitch-variable system；
Described pitch-variable system include angular displacement sensor (22), ring gear (23), little gear (24), hydraulic motor (25),
Proportional direction valve (26), the first overflow valve (27), variable pump (28) and the first fuel tank (29)；The inlet port of wherein variable pump (28)
From the first fuel tank (29) oil suction, the force feed mouth of variable pump (28) connects oil-in and the proportion directional of the first overflow valve (27) respectively
The P mouth of valve (26), oil-out A and B of (26) of proportional direction valve connects two hydraulic fluid ports of hydraulic motor (25), ratio side respectively
It is connected with power controller (17) to valve (26), and by the latter's output control signal, control the valve port of proportional direction valve (26) to open
Degree, hydraulic motor (25) is coaxially connected with little gear (24), and little gear (24) is engaged with ring gear (23), ring gear (23) and wind
The wheel hub of wheel (2) collectively forms bearing, and wind wheel (2) blade is arranged on ring gear (23) by bolt, on the wheel hub of wind wheel (2)
Two panels blade is installed, and little gear (24) is arranged on the steel plate the same face being consolidated with wheel hub with angular displacement sensor (22)；
Described power generation part includes electromotor (19), multifunction instrument (20) and electrical network (21)；
Described hydraulic drive part includes the first torque and speed sensorses (4), dosing pump (5), pressure duct (6), the first list
Pass to valve (7), the second check valve (8), the second overflow valve (9), slippage pump (10), repairing fuel tank (11), relief valve (12), flow
Sensor (13), rotational speed governor (14), variable displacement motor (15), power controller (17), the second torque and speed sensorses (16) and
Low pressure line (30)；
Wind wheel (2) nearby installs air velocity transducer (1), and it is coaxial with dosing pump (5) main shaft that wind wheel (2) passes through the first power transmission shaft (3)
Connect；First torque and speed sensorses (4) are arranged on the power transmission shaft (3) connecting wind wheel (2) and dosing pump (5) main shaft；Quantitative
The oil-in of pump (5) exports hydraulic oil from low pressure line (30) oil suction, the force feed mouth of dosing pump (5) by pressure duct (6), and
In pressure duct (6) upper setting flow transducer (13)；Relief valve (12) be connected across pressure duct (6) and low pressure line (30) it
Between；The inlet port of variable displacement motor (15) is connected with pressure duct (6), the oil drain out of variable displacement motor (15) and low pressure line (30) phase
Even；The main shaft of variable displacement motor (15) passes through the main shaft of the coaxially connected electromotor of second driving shaft (18) (19), variable displacement motor (15)
Driven by Coaxial electromotor (19) generates electricity, and input electric energy, to electrical network (21), is provided with many between electromotor (19) and electrical network (21)
Function instrument (20)；Second torque and speed sensorses (16) are arranged on link variable motor (15) main shaft and electromotor (19) main shaft
Second driving shaft (18) on；Slippage pump (10) inlet port is connected with repairing fuel tank (11), and slippage pump (10) force feed mouth connects respectively
Connect the first check valve (7) and one end of the second check valve (8), the other end of the first check valve (7) is connected to pressure duct (6),
The other end of the second check valve (8) is connected to low pressure line (30)；Second overflow valve (9) be connected across slippage pump (10) force feed mouth with
Between repairing fuel tank (11)；Power controller (17) input connects the first torque and speed sensorses (4) respectively, the second rotating speed turns
Square sensor (16), the angular displacement sensor (22) of multifunction instrument (20), air velocity transducer (1) and pitch-variable system；Power
Controller (17) outfan connects the proportional direction valve (26) of pitch-variable system；Rotational speed governor (14) input connection flow respectively
Quantity sensor (13), the second torque and speed sensorses (16) and multifunction instrument (20), rotational speed governor (14) outfan connects
Variable displacement motor (15)；It is characterized in that the method includes herein below：
When electrical network (21) Voltage Drop, because low-voltage process is extremely short, therefore first pass through rotational speed governor (14) and control
Variable displacement motor (15) pivot angle：Rotational speed governor (14) gathers turning of variable displacement motor (15) by the second torque and speed sensorses (16)
Speed, flow transducer (13) gathers the flow of pressure duct (6), and multifunction instrument (20) collection electrical network (21) frequency and electricity
Pressure, then to variable displacement motor (15), realization, to variable displacement motor (15) swinging angle control, increases rotational speed governor (14) output control signal
The discharge capacity of big variable displacement motor (15), makes the high-pressure of hydraulic system reduce rapidly, makes in hydraulic drive partial high pressure pipeline (6)
The oil pressure of hydraulic oil reduce rapidly, thus increasing the rotating speed of dosing pump (5), dump energy is converted into by wind wheel (2) with this
Kinetic energy, this control process ensures electrical network (21) not off-grid, so that system speed stabilizing is exported it is ensured that unit normally runs；Pass through work(simultaneously
Rate controller (17) controls pitch-variable system operating：First, power controller (17) gathers wind speed by air velocity transducer (1),
First torque and speed sensorses (4) gather wind speed round, by multifunction instrument (20) gather electromotor (19) output and
Line voltage, gathers the propeller pitch angle of wind wheel (2) blade by angular displacement sensor (22)；Then, power controller (17) output
Control signal, to the proportional direction valve (26) of pitch-variable system, makes the valve port opening of proportional direction valve (26) reduce, so make into
The flow entering hydraulic motor (25) reduces, and hydraulic motor (25) is connected with little gear (24) coaxial rigid, little gear (24) with interior
Gear ring (23) engages, and therefore reduces the propeller pitch angle of wind wheel (2) blade, thus reducing the energy input of whole system, will simultaneously
Remaining energy eliminates；
After failure removal, power controller (17) controls pitch-variable system operating：First, power controller (17) passes through wind speed
Sensor (1) gathers wind speed, and the first torque and speed sensorses (4) gather wind wheel (2) rotating speed, is gathered by multifunction instrument (20)
Electromotor (19) output and electrical network (21) voltage, angular displacement sensor (22) gathers the blade pitch angle of wind wheel (2)；So
Afterwards, power controller (17) output control signal, to pitch-variable system proportional direction valve (26), makes the valve of proportional direction valve (26)
Mouthful aperture increases, and then so that the flow of entrance hydraulic motor (25) is increased, hydraulic motor (25) and little gear (24) coaxial rigid
Connecting, little gear (24) is engaged with ring gear (23), therefore increasing the propeller pitch angle of wind wheel (2) blade, thus increasing whole system
Energy input, make electromotor (19) active power with the power variation rate of at least 11% rated power/second injection electrical network (21),
Electrical network (21) is supported to recover the state to fault.
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| CN106246463A (en) * | 2016-07-19 | 2016-12-21 | 沈阳华创风能有限公司 | The test system of wind generating set pitch control system and appraisal procedure |
| CN106374526A (en) * | 2016-09-14 | 2017-02-01 | 燕山大学 | Hydraulic wind power generation set and energy layered-controlled low-voltage ride through control method |
| CN106870289B (en) * | 2017-03-28 | 2023-08-08 | 兰州理工大学 | Hydrostatic energy storage type hydraulic drive wind generating set and control method |
| CN108167132B (en) * | 2017-12-01 | 2019-07-26 | 北京金风科创风电设备有限公司 | Hydraulic variable-pitch low-voltage ride-through simulation system and test method |
| CN110805521B (en) * | 2019-11-08 | 2020-11-13 | 燕山大学 | Novel frequency modulation control system and control method for energy storage type hydraulic wind generating set |
| CN111997837B (en) * | 2020-08-17 | 2022-10-18 | 燕山大学 | Hydraulic wind turbine generator power active control system and active control method thereof |
| CN112610419B (en) * | 2020-12-16 | 2022-04-29 | 南京工程学院 | Hydraulic wind turbine generator set based on PLC and MSC II control |
| CN113027687B (en) * | 2021-03-09 | 2022-07-15 | 南京工程学院 | Hydraulic wind turbine generator optimal power tracking control system and method |
| CN114920327A (en) * | 2022-05-26 | 2022-08-19 | 南京工程学院 | Control system and method for directly driving seawater to desalt water quality by energy storage type hydraulic fan |
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