CN102332728B - System for controlling permanent magnet wind turbine generator set according to given power under full wind condition - Google Patents
System for controlling permanent magnet wind turbine generator set according to given power under full wind condition Download PDFInfo
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- CN102332728B CN102332728B CN201110294103XA CN201110294103A CN102332728B CN 102332728 B CN102332728 B CN 102332728B CN 201110294103X A CN201110294103X A CN 201110294103XA CN 201110294103 A CN201110294103 A CN 201110294103A CN 102332728 B CN102332728 B CN 102332728B
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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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- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The invention discloses a system for controlling a permanent magnet wind turbine generator set according to given power under a full wind condition, which comprises a measuring and filtering circuit, an independent variable-pitch power control circuit, a power control circuit of an AC-DC (alternating current-direct current) bridge type rectifier of a permanent magnet wind turbine generator, a power control circuit of a grid-side DC-AC bridge type inverter, a three-phase phase-locked circuit, a real-time power calculation circuit based on three-phase phase locking and a power giving circuit. The control system disclosed by the invention is the power control system for controlling according to the given power at a full wind speed, through the coordinated operation of all the parts, the control output according to the given power can be realized at a strong wind speed, and the tracking control according to the given power or the maximum wind power can be realized at a weak wind speed, thereby being favorable for grid-connected operation of the system, being favorable for enabling a permanent magnet wind power system and other power generation systems with energy storage devices to participate in frequency modulation of the system together, and further realizing the power smooth output of the permanent magnet wind power system.
Description
Technical field
The invention belongs to the permanent magnetism wind power generation system field in the new forms of energy distributed generation technology, be specifically related to the system that controls by given power under a kind of permanent-magnetic wind driven generator group full blast condition.
Background technology
Along with developing rapidly of wind power technology and industry, the wind energy power supply constantly increases, and all plan after following 30 years with the U.S. in Europe, makes wind energy supply electric energy account for more than 20% of whole power industry energy output ratio.Under a kind of like this background, wind generator system participates in adjusting, Unit Economic scheduling and the electricity market running of system frequency, active power, will become development trend, and be the key technology of these operations by the power output of given power control wind generator system.On the other hand, because wind energy is random, intermittently, the fluctuation of power output is larger, therefore, given performance number be set in based on prediction, on the average power content of wind energy or less than mean value, carry out the control output by given power, help the fluctuation of level and smooth wind generator system power output, play the effect in peak clipping Pinggu, and then help the safe and stable operation of whole electric power system.
Wind generator system is that a class has various types of, complicated energy conversion system.Variable speed permanent magnetism wind power generation system becomes the important research and development direction in Global Wind Power Industry field because it has the advantages such as energy conversion efficiency is high, system reliability is high, the power that is incorporated into the power networks is controlled flexibly, the wind turbine unit is simple thereby failure rate of machinery is low (not containing or only contain a secondary gear gearbox), fault ride-through capacity is strong
At present, lot of domestic and foreign scholar has done extensive and deep research to the core control section of variable speed permanent magnetism wind power generation system, the control that the rotating speed that focuses on wind turbine generator of research is controlled and followed the trail of based on the strong wind power that rotating speed is controlled.But, the Poewr control method of employing maximum power tracing, in full blast condition situation, due to the randomness of wind energy, intermittence will cause the fluctuation of wind generator system power output large, and will be large on the impact of electrical network.in recent years, existing scholar has proposed the control thinking with the firm power control of energy storage device, and apply in power control system with the double-fed wind power generator group of energy storage device, as describing ([1] Liyan Qu in document [1], Wei Qiao. Constant Power Control of DFIG Wind Turbines With Supercapacitor Energy Storage[J]. IEEE Transactions on Industry Applications, 2011, 47(1): 359-367), its principle is when wind is under powered, utilize the deficiency of energy storage device compensation wind generator system rated power output, thereby the power of realizing constant rated power output is smoothly exported.In this method, wind generator system still adopts is Poewr control method by maximum power tracing, like this, on the one hand, causes for the fluctuation of the power output of the energy storage device of power back-off greatlyr, is unfavorable for the safety of energy storage device, stable operation; On the other hand, the wind generator system that this firm power with energy storage device is controlled still can't be realized the control by given power, thereby can't participate in adjusting, Unit Economic scheduling and the electricity market running of system frequency, active power.Hence one can see that, realizes that wind generator system is very important by the power control of given power.
Summary of the invention
For this reason, the object of the present invention is to provide the system that controls by given power under a kind of permanent-magnetic wind driven generator group full blast condition, smoothly export with the power of realizing the permanent magnetism wind power system, realize the functions such as the economic dispatch of permanent-magnetic wind driven generator group and electricity market running.
Realize that the technical scheme that the object of the invention adopts is: the system that controls by given power under permanent-magnetic wind driven generator group full blast condition comprises: measure the power control circuit, three-phase phase lock circuitry of power control circuit, the grid side DC-AC bridge-type inverter of the AC-DC bridge rectifier of filter circuit, independent pitch power control circuit, permanent-magnetic wind driven generator, based on the phase-locked realtime power counting circuit of three-phase, given power circuit;
The output of described three-phase phase lock circuitry includes two kinds of signals, the i.e. frequency signal of three-phase alternating voltage and phase signal; Described output based on the phase-locked realtime power counting circuit of three-phase comprises real-time active power signal output part and real-time reactive power signals output; The output of described given power circuit comprises given active power signal output part and given reactive power signals output;
described measurement filter circuit comprises wind speed measuring circuit, rotor phase measuring circuit, rotor speed measuring circuit, threephase stator current measurement circuit, capacitor two ends DC voltage measuring circuit, the three-phase current measuring circuit that flows into electrical network and the three-phase voltage measuring circuit of grid nodes, wherein, the input of measuring the wind speed measuring circuit in filter circuit is connected on wind speed measuring sensor on the permanent-magnetic wind driven generator group, the input of rotor phase measuring circuit is connected on the rotor-position sensor of permanent magnet generator, the input of rotor speed measuring circuit is connected on the rotor speed measuring transducer of permanent magnet generator, the input of threephase stator current measurement circuit is connected on the stator current measuring transducer of permanent magnet generator, the input of capacitor two ends DC voltage measuring circuit is connected on the dc voltage measurement transducer, the input that flows into the three-phase current measuring circuit of electrical network is connected on the three-phase current measuring transducer that flows into electrical network, the input of the three-phase voltage measuring circuit of grid nodes is connected on the three-phase voltage measuring transducer of grid nodes, the output of wind speed measuring circuit is connected with the power control circuit of the AC-DC bridge rectifier of independent pitch power control circuit, permanent-magnetic wind driven generator, rotor phase measuring circuit, rotor speed measuring circuit and threephase stator current measurement circuit are connected output and are connected with the power control circuit of the AC-DC bridge rectifier of permanent-magnetic wind driven generator, the output of capacitor two ends DC voltage measuring circuit is connected with the power control circuit of the AC-DC bridge rectifier of permanent-magnetic wind driven generator and the power control circuit of grid side DC-AC bridge-type inverter, the three-phase current measuring circuit that flows into electrical network is connected the output of three-phase voltage measuring circuit and is connected with power control circuit and the realtime power counting circuit of grid side DC-AC bridge-type inverter with grid nodes, the output of the three-phase voltage measuring circuit of grid nodes is also connected to the three-phase phase lock circuitry, the output of three-phase phase lock circuitry is connected to the power control circuit of grid side DC-AC bridge-type inverter, the real-time active power signal output part of realtime power counting circuit is connected with the power control circuit of the AC-DC bridge rectifier of independent pitch power control circuit, permanent-magnetic wind driven generator, and its real-time reactive power signals output is connected with the power control circuit of grid side DC-AC bridge-type inverter, the given active power signal output part of given power circuit is connected with the power control circuit of independent pitch power control circuit, AC-DC bridge rectifier, and its given reactive power signals output is connected with the power control circuit of grid side DC-AC bridge-type inverter, their output of power control circuit of the power control circuit of the AC-DC bridge rectifier of independent pitch power control circuit, permanent-magnetic wind driven generator, grid side DC-AC bridge-type inverter is connected PWM bridge-type inverter pwm pulse input with the pwm pulse input that the propeller pitch angle of the wind turbine of permanent-magnetic wind driven generator group is controlled actuator, the controlled PWM bridge rectifier of three-phase respectively and is connected with three-phase.
described independent pitch power control circuit comprises the power P I circuit of controlling propeller pitch angle, propeller pitch angle zero setting control circuit, the duplex double-throw diverter switch of wind-engaging speed control system, blade pitch angle drive circuit, wherein control the power P I circuit of propeller pitch angle, their output of propeller pitch angle zero setting control circuit and wind speed measuring circuit is connected with the duplex double-throw diverter switch of wind-engaging speed control system, the other end of the duplex double-throw diverter switch of wind-engaging speed control system is connected with blade pitch angle drive circuit, the output of blade pitch angle drive circuit is connected with wind turbine, the real-time active power signal output part of power calculation circuit is connected with the power P I circuit of controlling propeller pitch angle respectively with the given active power signal output part of given power circuit, control the power P I circuit of propeller pitch angle, propeller pitch angle zero setting control circuit, the output of wind speed measuring circuit is connected with the duplex double-throw diverter switch of wind-engaging speed control system, the output of the duplex double-throw diverter switch of wind-engaging speed control system is connected with blade pitch angle drive circuit, the slurry elongation actuator of blade pitch angle drive circuit and blade is connected.
the power control circuit of the AC-DC bridge rectifier of described permanent-magnetic wind driven generator comprises: three phase static abc Coordinate Conversion is the change-over circuit of two-phase rotation dq coordinate, the interior ring PI control circuit based on Feedforward Decoupling of two-phase dq electric current, two-phase rotation dq Coordinate Conversion be three phase static abc coordinate sentence the accuser to the punishment facing the person he falsely accused the mark change-over circuit, the three-phase PWM pulse generator, outer shroud PI power control circuit by given power control, calculate the optimized rotating speed circuit according to wind speed, encircle the PI control circuit in the rotating speed that limited by optimized rotating speed, the duplex double-throw diverter switch of wind-engaging speed control system, the rated speed circuit, ring PI control circuit in rated speed, wherein: three phase static abc Coordinate Conversion is that input and the rotor phase measuring circuit in the measurement filter circuit of the change-over circuit of two-phase rotation dq coordinate is connected output and is connected with the threephase stator current measurement circuit, the input based on the interior ring PI control circuit of Feedforward Decoupling of two-phase dq electric current is the change-over circuit of two-phase rotation dq coordinate with three phase static abc Coordinate Conversion, the output of the duplex double-throw diverter switch of the rotor speed measuring circuit in the measurement filter circuit and wind-engaging speed control system is connected, two-phase rotation dq Coordinate Conversion is being connected based on the interior ring PI control circuit of Feedforward Decoupling, the output of rotor phase measuring circuit, capacitor two ends DC voltage measuring circuit in the measurement filter circuit of the input of sentencing the accuser to the punishment facing the person he falsely accused the mark change-over circuit and two-phase dq electric current of three phase static abc coordinate, the input of three-phase PWM pulse generator is connected with the output of sentencing the accuser to the punishment facing the person he falsely accused the mark change-over circuit that two-phase rotation dq Coordinate Conversion is three phase static abc coordinate, the output of three-phase PWM pulse generator is connected with the controlled PWM bridge rectifier of three-phase, the input of pressing the outer shroud PI power control circuit of given power control is connected with the given active power signal output part of the real-time active power signal output part of realtime power counting circuit, given power circuit, the output of the wind speed measuring circuit in the input that calculates the optimized rotating speed circuit according to wind speed and measurement filter circuit is connected, the input that is subjected to ring PI control circuit in the rotating speed of optimized rotating speed restriction with measure filter circuit in rotor speed measuring circuit, the outer shroud PI power control circuit of controlling by given power, be connected according to the output of wind speed calculating optimized rotating speed circuit, the input of the duplex double-throw diverter switch of wind-engaging speed control system with measure filter circuit in wind speed measuring circuit, rated speed in ring PI control circuit, be connected by the output of ring PI control circuit in the rotating speed of optimized rotating speed restriction, rotor speed measuring circuit in rated speed in the input of ring PI control circuit and measurement filter circuit, the output of rated speed circuit are connected.
the power control circuit of described grid side DC-AC bridge-type inverter comprises: three phase static abc Coordinate Conversion is the change-over circuit of two-phase rotation dq coordinate, the interior circular current PI control circuit based on Feedforward Decoupling of two-phase dq electric current, two-phase rotation dq Coordinate Conversion be three phase static abc coordinate sentence the accuser to the punishment facing the person he falsely accused the mark change-over circuit, the three-phase PWM pulse generator, the set-point circuit of capacitance terminal direct voltage, capacitance terminal voltage PI control circuit, reactive power PI control circuit, wherein: three phase static abc Coordinate Conversion is the input and the three-phase current measuring circuit of measuring inflow electrical network in filter circuit of the change-over circuit of two-phase rotation dq coordinate, the frequency signal of the three-phase voltage measuring circuit of grid nodes and the three-phase voltage of three-phase phase lock circuitry is connected output and is connected with phase signal, the input of capacitance terminal voltage PI control circuit with measure filter circuit in the output of set-point circuit of the voltage signal of capacitor two ends DC voltage measuring circuit and capacitance terminal direct voltage be connected, real-time reactive power signals output in the input of reactive power PI control circuit and power calculation circuit and the given reactive power signals output in given power circuit are connected, the input based on the interior circular current PI control circuit of Feedforward Decoupling of two-phase dq electric current is the change-over circuit of two-phase rotation dq coordinate with three phase static abc Coordinate Conversion, frequency signal, capacitance terminal voltage PI control circuit and their output of reactive power PI control circuit of the three-phase alternating voltage in the three-phase phase lock circuitry are connected, two-phase rotation dq Coordinate Conversion is being connected the output of voltage signal of capacitor two ends DC voltage measuring circuit with phase signal based on the interior circular current PI control circuit of Feedforward Decoupling, the frequency signal of three-phase voltage in the three-phase phase lock circuitry and being connected of the input of sentencing the accuser to the punishment facing the person he falsely accused the mark change-over circuit and two-phase dq electric current of three phase static abc coordinate, the input of three-phase PWM pulse generator is connected with the output of sentencing the accuser to the punishment facing the person he falsely accused the mark change-over circuit that two-phase rotation dq Coordinate Conversion is three phase static abc coordinate, and output is connected with the pwm pulse input of the controlled PWM bridge-type inverter of three-phase.
Control system in the present invention is under a cover full blast speed, power control system by given power control, coordinate operation through various piece can realize controlling output by given power under high wind speed, the control of following the trail of by given power or strong wind power under weak wind speed, being conducive to system is incorporated into the power networks, be conducive to permanent magnetism wind power system and other electricity generation systems with energy storage device and participate in together system's frequency modulation, thereby the power of realizing the permanent magnetism wind power system is smoothly exported, and realizes the functions such as the economic dispatch of permanent-magnetic wind driven generator group and electricity market running.
The invention will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the structured flowchart of the system that controls by given power under permanent-magnetic wind driven generator group full blast condition of the present invention.
Fig. 2 is the structured flowchart of independent pitch power control circuit in the present invention.
Fig. 3 is the structured flowchart of power control circuit of the AC-DC bridge rectifier of permanent-magnetic wind driven generator in the present invention.
Fig. 4 is the structured flowchart of the power control circuit of grid side DC-AC bridge-type inverter in the present invention.
Fig. 5 is that the per unit value of wind turbine generator power output is with the change curve of blade angle speed.
Embodiment
As shown in Figure 1, the permanent-magnetic wind driven generator group comprises the blade of wind turbine, wind turbine directly is connected or is connected (in this example, selection directly is connected) by simple gearbox by the rotor of wheel hub and permanent magnet generator, the threephase stator coil of permanent magnet generator is connected with the controlled PWM bridge rectifier of three-phase AC, the DC side of the controlled PWM bridge rectifier of three-phase and a capacitor are in parallel, then be parallel to the DC side of the controlled PWM bridge-type inverter of three-phase, the AC of the controlled PWM bridge-type inverter of three-phase is through a three pole reactor filter access electrical network.the system that controls by given power under permanent-magnetic wind driven generator group full blast condition of the present invention comprises: measure the power control circuit 3, three-phase phase lock circuitry 5 of power control circuit 2, the grid side DC-AC bridge-type inverter of the AC-DC bridge rectifier of filter circuit 4, independent pitch power control circuit 1, permanent-magnetic wind driven generator, based on the phase-locked realtime power counting circuit 6 of three-phase, given power circuit 7, the output of described three-phase phase lock circuitry 5 includes two kinds of signals, the i.e. frequency signal of three-phase alternating voltage and phase signal, described output based on the phase-locked realtime power counting circuit 6 of three-phase comprises real-time active power signal output part and real-time reactive power signals output, the output of described given power circuit 7 comprises given active power signal output part and given reactive power signals output, described measurement filter circuit 4 comprises wind speed measuring circuit 41, rotor phase measuring circuit 42, rotor speed measuring circuit 43, threephase stator current measurement circuit 44, capacitor two ends DC voltage measuring circuit 45, flows into the three-phase current measuring circuit 46 of electrical network and the three-phase voltage measuring circuit 47 of grid nodes, wherein, the input of measuring the wind speed measuring circuit 41 in filter circuit 4 is connected on wind speed measuring sensor on the permanent-magnetic wind driven generator group, the input of rotor phase measuring circuit 42 is connected on the rotor-position sensor of permanent magnet generator, the input of rotor speed measuring circuit 43 is connected on the rotor speed measuring transducer of permanent magnet generator, the input of threephase stator current measurement circuit 44 is connected on the stator current measuring transducer of permanent magnet generator, the input of capacitor two ends DC voltage measuring circuit 45 is connected on the dc voltage measurement transducer, the input that flows into the three-phase current measuring circuit 46 of electrical network is connected on the three-phase current measuring transducer that flows into electrical network, the input of the three-phase voltage measuring circuit 47 of grid nodes is connected on the three-phase voltage measuring transducer of grid nodes, the output of wind speed measuring circuit 41 is connected with the power control circuit 2 of the AC-DC bridge rectifier of independent pitch power control circuit 1, permanent-magnetic wind driven generator, the output that rotor phase measuring circuit 42, rotor speed measuring circuit 43 and threephase stator current measurement circuit are connected is connected with the power control circuit 2 of the AC-DC bridge rectifier of permanent-magnetic wind driven generator, the output of capacitor two ends DC voltage measuring circuit 45 is connected with the power control circuit 2 of the AC-DC bridge rectifier of permanent-magnetic wind driven generator and the power control circuit 3 of grid side DC-AC bridge-type inverter, the three-phase current measuring circuit 46 that flows into electrical network is connected the output of three-phase voltage measuring circuit 47 and is connected with power control circuit 3 and the realtime power counting circuit 6 of grid side DC-AC bridge-type inverter with grid nodes, the output of the three-phase voltage measuring circuit 47 of grid nodes is also connected to three-phase phase lock circuitry 5, the frequency signal of three-phase phase lock circuitry 5 and the output of phase signal are connected to the power control circuit 3 of grid side DC-AC bridge-type inverter, the real-time active power signal output part of realtime power counting circuit 6 is connected with the power control circuit 2 of the AC-DC bridge rectifier of independent pitch power control circuit 1, permanent-magnetic wind driven generator, and its real-time reactive power signals output is connected with the power control circuit 3 of grid side DC-AC bridge-type inverter, the given active power signal output part of given power circuit 7 is connected with the power control circuit 2 of independent pitch power control circuit 1, AC-DC bridge rectifier, and its given reactive power signals output is connected with the power control circuit 3 of grid side DC-AC bridge-type inverter, their output of the power control circuit 2 of the AC-DC bridge rectifier of independent pitch power control circuit 1, permanent-magnetic wind driven generator, the power control circuit of grid side DC-AC bridge-type inverter 3 is connected PWM bridge-type inverter pwm pulse input with the pwm pulse input that the propeller pitch angle of the wind turbine of permanent-magnetic wind driven generator group is controlled actuator, the controlled PWM bridge rectifier of three-phase respectively and is connected with three-phase.
the structure chart of independent pitch power control circuit 1 is as shown in the empty frame in Fig. 2, comprise the power P I circuit 11 of controlling propeller pitch angle, propeller pitch angle zero setting control circuit 12, the duplex double-throw diverter switch 13 of wind-engaging speed control system, blade pitch angle drive circuit 14, wherein control the power P I circuit 11 of propeller pitch angle, their output of propeller pitch angle zero setting control circuit 12 and wind speed measuring circuit 41 is connected with the duplex double-throw diverter switch 13 of wind-engaging speed control system, the other end of the duplex double-throw diverter switch 13 of wind-engaging speed control system is connected with blade pitch angle drive circuit 14, the output of blade pitch angle drive circuit 14 is connected with wind turbine, the real-time active power signal output part of power calculation circuit 6 is connected with the power P I circuit 11 of controlling propeller pitch angle respectively with the given active power signal output part of given power circuit 7, control the power P I circuit 11 of propeller pitch angle, propeller pitch angle zero setting control circuit 12, the output of wind speed measuring circuit 41 is connected with the duplex double-throw diverter switch 13 of wind-engaging speed control system, the output of the duplex double-throw diverter switch 13 of wind-engaging speed control system is connected with blade pitch angle drive circuit 14, the slurry elongation actuator of blade pitch angle drive circuit 14 and blade is connected.
the circuit structure of the power control circuit 2 of the AC-DC bridge rectifier of permanent-magnetic wind driven generator is as shown in the empty frame on right side in Fig. 3, comprise: three phase static abc Coordinate Conversion is the change-over circuit 21 of two-phase rotation dq coordinate, the interior ring PI control circuit 22 based on Feedforward Decoupling of two-phase dq electric current, two-phase rotation dq Coordinate Conversion is that sentencing the accuser to the punishment facing the person he falsely accused of three phase static abc coordinate marked change-over circuit 23, three-phase PWM pulse generator 24, outer shroud PI power control circuit 25 by given power control, calculate optimized rotating speed circuit 26 according to wind speed, encircle PI control circuit 27 in the rotating speed that limited by optimized rotating speed, the duplex double-throw diverter switch 28 of wind-engaging speed control system, rated speed circuit 29, ring PI control circuit 20 in rated speed, wherein: three phase static abc Coordinate Conversion is that the input of the change-over circuit 21 of two-phase rotation dq coordinate is connected with the output that the rotor phase measuring circuit 42 in measuring filter circuit 4 is connected with the threephase stator current measurement circuit, the input based on the interior ring PI control circuit 22 of Feedforward Decoupling of two-phase dq electric current is the change-over circuit 21 of two-phase rotation dq coordinate with three phase static abc Coordinate Conversion, the output of the duplex double-throw diverter switch 28 of the rotor speed measuring circuit 43 in measurement filter circuit 4 and wind-engaging speed control system is connected, two-phase rotation dq Coordinate Conversion is being connected based on the interior ring PI control circuit 22 of Feedforward Decoupling, the output of rotor phase measuring circuit 42, capacitor two ends DC voltage measuring circuit 45 in measurement filter circuit 4 of the input of sentencing the accuser to the punishment facing the person he falsely accused mark change-over circuit 23 and two-phase dq electric current of three phase static abc coordinate, the input of three-phase PWM pulse generator 24 is connected with the output of sentencing the accuser to the punishment facing the person he falsely accused mark change-over circuit 23 that two-phase rotation dq Coordinate Conversion is three phase static abc coordinate, the output of three-phase PWM pulse generator 24 is connected with the controlled PWM bridge rectifier of three-phase, the input of pressing the outer shroud PI power control circuit 25 of given power control is connected with the real-time active power signal output part of realtime power counting circuit 6, the given active power signal output part of given power circuit 7, the output of the wind speed measuring circuit 41 in the input that calculates optimized rotating speed circuit 26 according to wind speed and measurement filter circuit 4 is connected, the input that is subjected to ring PI control circuit 27 in the rotating speed of optimized rotating speed restriction with measure filter circuit 4 in rotor speed measuring circuit 43, the outer shroud PI power control circuit 25 of controlling by given power, be connected according to the output of wind speed calculating optimized rotating speed circuit 26, the input of the duplex double-throw diverter switch 28 of wind-engaging speed control system with measure filter circuit 4 in wind speed measuring circuit 41, rated speed in ring PI control circuit 20, be connected by the output of ring PI control circuit 27 in the rotating speed of optimized rotating speed restriction, rotor speed measuring circuit 43 in rated speed in the input of ring PI control circuit 20 and measurement filter circuit 4, the output of rated speed circuit 29 are connected.
the circuit structure of the power control circuit 3 of grid side DC-AC bridge-type inverter is as shown in the empty frame on right side in Fig. 4, the power control circuit 2 of the AC-DC bridge rectifier of integrated circuit and permanent-magnetic wind driven generator has many similar, comprise: three phase static abc Coordinate Conversion is the change-over circuit 31 of two-phase rotation dq coordinate, the interior circular current PI control circuit 32 based on Feedforward Decoupling of two-phase dq electric current, two-phase rotation dq Coordinate Conversion is that sentencing the accuser to the punishment facing the person he falsely accused of three phase static abc coordinate marked change-over circuit 33, three-phase PWM pulse generator 34, the set-point circuit 35 of capacitance terminal direct voltage, capacitance terminal voltage PI control circuit 36, reactive power PI control circuit 37, wherein: three phase static abc Coordinate Conversion is the input and the three-phase current measuring circuit 46 of measuring inflow electrical network in filter circuit 4 of the change-over circuit 31 of two-phase rotation dq coordinate, the frequency signal of the three-phase voltage measuring circuit 47 of grid nodes and the three-phase alternating voltage of three-phase phase lock circuitry 5 is connected output and is connected with phase signal, the input of capacitance terminal voltage PI control circuit 36 with measure filter circuit 4 in the output of set-point circuit 35 of the voltage signal of capacitor two ends DC voltage measuring circuit 45 and capacitance terminal direct voltage be connected, real-time reactive power signals output in the input of reactive power PI control circuit 37 and power calculation circuit 6 and the given reactive power signals output in given power circuit 7 are connected, be input and the three phase static abc Coordinate Conversion based on the interior circular current PI control circuit 32 of Feedforward Decoupling of two-phase dq electric current the change-over circuit 31 of two-phase rotation dq coordinate, whether the frequency signal of the three-phase alternating voltage in three-phase phase lock circuitry 5 (also comprises phase signal?), their output of capacitance terminal voltage PI control circuit 36 and reactive power PI control circuit 37 connects, two-phase rotation dq Coordinate Conversion is being connected the output of voltage signal of output and capacitor two ends DC voltage measuring circuit 45 with phase signal based on the interior circular current PI control circuit 32 of Feedforward Decoupling, the frequency signal of three-phase alternating voltage in three-phase phase lock circuitry 5 and being connected of the input of sentencing the accuser to the punishment facing the person he falsely accused mark change-over circuit 33 and two-phase dq electric current of three phase static abc coordinate, the input of three-phase PWM pulse generator 34 is connected with the output of sentencing the accuser to the punishment facing the person he falsely accused mark change-over circuit 33 that two-phase rotation dq Coordinate Conversion is three phase static abc coordinate, and output is connected with the pwm pulse input of the controlled PWM bridge-type inverter of three-phase.
operation principle: see Fig. 1, the three-phase voltage measuring circuit 47 of measuring the three-phase current measuring circuit 46 of the inflow electrical network in filter circuit 4 and grid nodes is measured respectively the controlled PWM bridge-type inverter of three-phase and is transported to three-phase current signal and three-phase voltage signal on electrical network, warp is based on the phase-locked power calculation circuit 6 of three-phase, calculate the realtime power signal that is transported on electrical network, real-time active power signal wherein and the given active power signal in given power circuit 7 and from the wind velocity signal of wind speed measuring circuit 41, deliver to together independent pitch power control circuit 1, active power signal and given active power signal are admitted in the power P I circuit 11 of controlling propeller pitch angle in real time, its difference is delivered to the duplex double-throw diverter switch 13 of wind-engaging speed control system after the PI computing, wind velocity signal is controlled diverter switch 13, when wind velocity signal during greater than rated wind speed, diverter switch 13 is selected power P I circuit 11, realize under high wind speed, by the control of given power.During lower than rated wind speed, diverter switch 13 is selected propeller pitch angle zero setting control circuits 12 when wind velocity signal, realizes under weak wind speed the control (referring to Fig. 2) of drawing as much as possible wind energy.
see Fig. 1, 3, measure the wind speed measuring circuit 41 in filter circuit 4, rotor phase measuring circuit 42, rotor speed measuring circuit 43, threephase stator current measurement circuit 44, capacitor two ends DC voltage measuring circuit 45, respectively the wind velocity signal of measuring gained, the rotor phase signal of permanent magnet generator, the rotor speed signal, the threephase stator current signal, the d. c. voltage signal at rectifier DC lateral capacitance two ends, and the real-time active power signal that calculates based on the phase-locked power calculation circuit 6 of three-phase and the given active power signal of given power circuit 7, deliver in the power control circuit 2 that is connected with the AC-DC bridge rectifier of permanent-magnetic wind driven generator, wherein, threephase stator current signal and rotor phase signal are the change-over circuit 21 of two-phase rotation dq coordinate through three phase static abc Coordinate Conversion, stator three-phase abc ac current signal is converted to two-phase dq dc current signal, again with given two-phase dq current value and rotor speed signal together, the interior ring PI control circuit 22 based on Feedforward Decoupling through two-phase dq electric current, calculate control threephase stator electric current and reach set-point, the needed two-phase dq of AC-DC bridge rectifier AC dc voltage value, the d. c. voltage signal at this value and rotor phase signal and rectifier DC lateral capacitance two ends together, be that sentencing the accuser to the punishment facing the person he falsely accused of three phase static abc coordinate marked change-over circuit 23 through two-phase rotation dq Coordinate Conversion again, convert the needed three-phase abc of AC-DC bridge rectifier AC ac voltage to, at last this three-phase voltage value as the reference magnitude of voltage, deliver to three-phase PWM pulse generator 24, produce the corresponding PWM control wave of controlling the AC-DC bridge rectifier of permanent-magnetic wind driven generator.The interior circular current PI that the two-phase dq electric current of foregoing circuit formation permanent magnet generator threephase stator electric current is pressed set-point controls, because d shaft current component is representing the idle component of threephase stator electric current, q shaft current component is representing the real component of threephase stator electric current, and active current is representing the size of electromagnetic torque, thereby has realized the control to permanent magnet generator reactive current and electromagnetic torque.In the present invention, be to improve the electromagnetism utilance of permanent magnet generator, the reactive current component namely d shaft current component be controlled to be zero, only carry out electromagnetic torque namely q shaft current component by the control of set-point.
The realtime power signal of power calculation circuit 6 and the active power set-point of given power circuit 7 are connected to the outer shroud PI power control circuit 25 of controlling by given power, its output is as the rotary speed setting value of ring PI control circuit 27 in the rotating speed that is subjected to the optimized rotating speed restriction, thereby realize coming by rotating speed the purpose of power ratio control, optimized rotating speed is to calculate by the foundation wind speed mathematical formulae that presets in optimized rotating speed circuit 26 to calculate.given rated speed circuit 29 is delivered to ring PI control circuit 20 in rated speed, encircle the output of ring PI control circuit 20 in PI control circuit 27 and rated speed in the rotating speed that limited by optimized rotating speed, all be connected to the duplex double-throw diverter switch 28 of wind-engaging speed control system, when high wind speed, the wind velocity signal of wind speed measuring circuit 41 is controlled diverter switch 28 and is selected ring PI control circuit 20 in rated speed, its output is as the interior given q shaft current value of encircling PI control circuit 22 based on Feedforward Decoupling of two-phase dq electric current, control by internal ring q shaft current, the control of realization to the electromagnetic torque of permanent magnet generator, thereby realize including ring PI control circuit 20 in rated speed, the control based on the permanent magnet generator rated speed of controlling based on dicyclo PI of the interior ring PI control circuit 22 of Feedforward Decoupling of two-phase dq electric current.When weak wind speed, encircle PI control circuit 27 in the rotating speed that wind velocity signal control diverter switch 28 is selected limited by optimized rotating speed, equally, by the control based on the given q shaft current value of the interior ring PI control circuit 22 of Feedforward Decoupling of internal ring two-phase dq electric current, ring PI control circuit 27 and two-phase dq electric current based on the control by given power of the permanent magnet generator of controlling based on three ring PI of the interior ring PI control circuit 22 of Feedforward Decoupling in the rotating speed that realize including the outer shroud PI power control circuit 25 controlled by given power, is subjected to the optimized rotating speed restriction.Carry out on the basis of electromagnetic torque of permanent magnet generator because the control of power is based on not only to have controlled the rotating speed of wind turbine generator but also controlled, can realize that therefore power sane under the full blast condition controls.
See Fig. 1,4, measure capacitor two ends DC voltage measuring circuit 45 in filter circuit 4, flow into the three-phase current measuring circuit 46 of electrical network and the three-phase voltage measuring circuit 47 of grid nodes is measured respectively the d. c. voltage signal at dc bus capacitor two ends, the three-phase current signal that is delivered to electrical network, the three-phase voltage signal on grid nodes, wherein: d. c. voltage signal and three-phase current signal are admitted in the power control circuit 3 of grid side DC-AC bridge-type inverter; Three-phase voltage signal is also got respectively frequency signal and the phase signal of three-phase voltage signal through three-phase phase lock circuitry 5, these two kinds of signals also are admitted in the power control circuit 3 of grid side DC-AC bridge-type inverter; Three-phase voltage signal and three-phase current signal also are admitted to based in the phase-locked realtime power counting circuit 6 of three-phase, calculate power control circuit 2 that real-time active power signal in the realtime power signal of gained is admitted to the AC-DC bridge rectifier of independent pitch power control circuit 1, permanent-magnetic wind driven generator, its real-time reactive power signals is admitted to the power control circuit 3 of grid side DC-AC bridge-type inverter.
in the power control circuit 3 of grid side DC-AC bridge-type inverter, three-phase current signal, three-phase voltage signal and be connected to the change-over circuit 31 that three phase static abc Coordinate Conversion is two-phase rotation dq coordinate from frequency signal and the phase signal of the three-phase voltage signal of three-phase phase lock circuitry 5, three-phase alternating current abc voltage and current signal is converted to two-phase dq axle dc voltage and current signal, again with the frequency signal of three-phase voltage signal and from capacitance terminal direct voltage PI control circuit 36 and the given two-phase dq axle dc current signal of reactive power PI control circuit 37 together, the interior circular current PI control circuit 32 based on Feedforward Decoupling through two-phase dq electric current, calculate the two-phase dq dc voltage value that dq axle dc current signal reaches the needed DC-AC bridge-type inverter of set-point AC, again with the d. c. voltage signal at the frequency signal of the three-phase voltage signal of three-phase phase lock circuitry 5 and phase signal and rectifier DC lateral capacitance two ends together, be that sentencing the accuser to the punishment facing the person he falsely accused of three phase static abc coordinate marked change-over circuit 33 through two-phase rotation dq Coordinate Conversion, two-phase dq dc voltage value is converted to three-phase abc ac voltage, deliver to three-phase PWM pulse generator 34 as the three-phase alternating current reference voltage level, produce the control three-phase current signal and reach the corresponding pwm pulse signal of needed given current value.What foregoing circuit was realized is the interior ring PI control of grid side DC-AC bridge-type inverter two-phase dq shaft current, representing the active power component of bridge-type inverter transfer power due to interior ring d shaft current, interior ring q shaft current is representing the reactive power component of bridge-type inverter transfer power, therefore, regulate the set-point of d shaft current, can realize the control of active power, and then realize the control of constant bridge-type inverter dc bus capacitor device two ends direct voltage; Regulate the set-point of q shaft current, can realize being delivered to the control of the reactive power of electrical network.
Measuring capacitor two ends dc voltage value that the capacitor two ends DC voltage measuring circuit 45 in filter circuit 4 measures and the set-point 35 of capacitance terminal direct voltage is connected in capacitance terminal direct voltage PI control circuit 36, its output is as the set-point of the d shaft current of the interior circular current PI control circuit 32 of Feedforward Decoupling, because the d shaft current is representing the size of the active power that is delivered to electrical network, thereby can realize regulating the purpose that the active power that is delivered to electrical network is come constant bridge-type inverter dc bus capacitor both end voltage.Real-time reactive power signals and the given reactive power signals in given power circuit 7 in realtime power counting circuit 6 are connected to reactive power PI control circuit 37, its output is as the set-point of the q shaft current of the interior circular current PI control circuit 32 of Feedforward Decoupling, because the q shaft current is directly representing the size of the reactive power that is delivered to electrical network, so can control the reactive power that is delivered to electrical network.
All element circuits in said system all adopt prior art, and physical circuit does not repeat them here.
Be used in the present invention under the full blast condition, the permanent-magnetic wind driven generator group comprises the steps: by the control method of the power control system of given power control
At first be set under a certain wind speed, when propeller pitch angle be zero and corresponding wind turbine generator be controlled in the situation of rated speed, the electromagnetic power of output is rated power, this moment, corresponding a certain wind speed, be defined as rated wind speed; Take rated wind speed as the boundary, according to the wind velocity signal value of actual measurement, control in two kinds of situation:
1) when the measured wind velocity signal of wind speed measuring circuit 41 when rated wind speed is above, wind turbine blade pitch angle drive circuit 14 in independent pitch power control circuit 1 selects to control by given active power the power P I circuit 11 of propeller pitch angle by the duplex double-throw diverter switch 13 of a wind-engaging speed control system, control by the size of regulating propeller pitch angle the size that wind energy is converted to mechanical energy, thereby realize the control by given active power; Simultaneously, the interior ring PI control circuit 22 based on Feedforward Decoupling of the two-phase dq electric current in the power control circuit 2 of the AC-DC bridge rectifier of permanent-magnetic wind driven generator is selected ring PI control circuit 20 in rated speed by the duplex double-throw diverter switch 28 of a wind-engaging speed control system, consisting of outer shroud is that rotating speed is controlled, interior ring is the control of active current q axle component, realizes that the dicyclo PI of rated speed controls.
2) the measured wind velocity signal of wind speed measuring circuit 41 is when rated wind speed is following, wind turbine blade pitch angle drive circuit 14 in independent pitch power control circuit 1 is selected propeller pitch angle zero setting control circuits 12 by the duplex double-throw diverter switch 13 of a wind-engaging speed control system, controlling propeller pitch angle is zero, is converted to mechanical energy thereby control as much as possible wind energy, simultaneously, ring PI control circuit 27 and the outer shroud PI power control circuit 25 controlled by given power in the rotating speed of selecting to be subjected to the optimized rotating speed restriction based on the interior ring PI control circuit 22 of Feedforward Decoupling by the duplex double-throw diverter switch 28 of a wind-engaging speed control system of the two-phase dq electric current in the power control circuit 2 of the AC-DC bridge rectifier of permanent-magnetic wind driven generator, consisting of outer shroud is that power is controlled, middle ring is controlled by the rotating speed of optimized rotating speed restriction, interior ring is the power control circuit based on three ring PI controls that the dq shaft current is controlled, control the purpose of permanent magnetism wind power generation system power stage when realizing weak wind speed by given power.At this moment, be divided into again two kinds of situations:
A) when wind power is sufficient, when namely absorbent strong wind power is greater than given power, by the power control circuit that aforesaid three ring PI control, rotating speed is controlled on the interior corresponding tachometer value corresponding to given power of optimized rotating speed scope, realizes the control output by given power.Like this, can effectively suppress a part due to the impact of the randomness of wind power and intermittent caused power crest disturbance on electrical network.
B) when the wind underpower, even draw maximum wind power, the capital is less than given power, the output of the outer shroud PI power control circuit 25 of pressing given power control of the power control circuit that the ring of three in the power control circuit 2 of the AC-DC bridge rectifier of permanent-magnetic wind driven generator PI controls, the set-point of ring PI control circuit 27 in the rotating speed that is subjected to the optimized rotating speed restriction is increased, increase thereby control rotating speed.If do not limit the increase of rotating speed, rotating speed will be over optimized rotating speed, increase on a maximum speed value that can not increase again, at this moment, the per unit value of the power output that foundation is shown in Figure 5 is with the change curve of blade angle speed, corresponding power output is certain to cause when wind is under powered lower than the corresponding peak power output value of optimized rotating speed, and is larger to recessed power fluctuation.Therefore, this to recessed fluctuation in order to weaken, method of the present invention is to utilize the aforementioned power control circuit of controlling based on three ring PI not only to control rotating speed, but also controlled the characteristics of electromagnetic torque, the restriction rotating speed is in the corresponding optimized rotating speed scope of this wind speed, when wind is under powered, rotating speed is limited on the optimized rotating speed value, automatically realizes the tracking of strong wind power, thus weakened due to be not strong wind power follow the trail of cause by a larger margin to recessed power fluctuation.
3) optimized rotating speed determines to utilize to calculate according to wind speed and presets that computing formula gets in optimized rotating speed circuit 26.Calculate optimized rotating speed according to formula, in formula, the optimum tip speed ratio for specific wind turbine unit has is the wind turbine blade radius; Also can according to the fitting function relational expression of the resulting optimized rotating speed of wind power generation operating experience and wind speed, calculate optimized rotating speed.
4) in aforementioned whole control procedure, the set-point 35 of the capacitance terminal direct voltage in the power control circuit 3 of grid side DC-AC bridge-type inverter and capacitor two ends DC voltage measuring circuit 45 measure capacitor two ends dc voltage value, interior circular current PI control circuit 32 by capacitance terminal direct voltage PI control circuit 36 and Feedforward Decoupling, realize regulating the size of the active power that is delivered to electrical network, the dicyclo PI of constant capacitance device two ends direct voltage controls, thereby the direct voltage that remains capacitor two ends is a steady state value; Real-time reactive power signals in realtime power counting circuit 6 and the given reactive power signals in given power circuit 7 are passed through the interior circular current PI control circuit 32 of reactive power PI control circuit 37 and Feedforward Decoupling, control is delivered to the reactive power of electrical network, realizes the purpose by given Reactive Power Control of controlling based on dicyclo PI.
Claims (4)
1. the system that controls by given power under a permanent-magnetic wind driven generator group full blast condition is characterized in that comprising: measure the power control circuit, three-phase phase lock circuitry of power control circuit, the grid side DC-AC bridge-type inverter of the AC-DC bridge rectifier of filter circuit, independent pitch power control circuit, permanent-magnetic wind driven generator, based on the phase-locked realtime power counting circuit of three-phase, given power circuit;
The output of described three-phase phase lock circuitry includes two kinds of signals, the i.e. frequency signal of three-phase alternating voltage and phase signal; Described output based on the phase-locked realtime power counting circuit of three-phase comprises real-time active power signal output part and real-time reactive power signals output; The output of described given power circuit comprises given active power signal output part and given reactive power signals output;
described measurement filter circuit comprises wind speed measuring circuit, rotor phase measuring circuit, rotor speed measuring circuit, threephase stator current measurement circuit, capacitor two ends DC voltage measuring circuit, the three-phase current measuring circuit that flows into electrical network and the three-phase voltage measuring circuit of grid nodes, wherein, the input of measuring the wind speed measuring circuit in filter circuit is connected on wind speed measuring sensor on the permanent-magnetic wind driven generator group, the input of rotor phase measuring circuit is connected on the rotor-position sensor of permanent magnet generator, the input of rotor speed measuring circuit is connected on the rotor speed measuring transducer of permanent magnet generator, the input of threephase stator current measurement circuit is connected on the stator current measuring transducer of permanent magnet generator, the input of capacitor two ends DC voltage measuring circuit is connected on the dc voltage measurement transducer, the input that flows into the three-phase current measuring circuit of electrical network is connected on the three-phase current measuring transducer that flows into electrical network, the input of the three-phase voltage measuring circuit of grid nodes is connected on the three-phase voltage measuring transducer of grid nodes, the output of wind speed measuring circuit is connected with the power control circuit of the AC-DC bridge rectifier of independent pitch power control circuit, permanent-magnetic wind driven generator, rotor phase measuring circuit, rotor speed measuring circuit and threephase stator current measurement circuit are connected output and are connected with the power control circuit of the AC-DC bridge rectifier of permanent-magnetic wind driven generator, the output of capacitor two ends DC voltage measuring circuit is connected with the power control circuit of the AC-DC bridge rectifier of permanent-magnetic wind driven generator and the power control circuit of grid side DC-AC bridge-type inverter, the three-phase current measuring circuit that flows into electrical network is connected the output of three-phase voltage measuring circuit and is connected with power control circuit and the realtime power counting circuit of grid side DC-AC bridge-type inverter with grid nodes, the output of the three-phase voltage measuring circuit of grid nodes is also connected to the three-phase phase lock circuitry, the output of three-phase phase lock circuitry is connected to the power control circuit of grid side DC-AC bridge-type inverter, the real-time active power signal output part of realtime power counting circuit is connected with the power control circuit of the AC-DC bridge rectifier of independent pitch power control circuit, permanent-magnetic wind driven generator, and its real-time reactive power signals output is connected with the power control circuit of grid side DC-AC bridge-type inverter, the given active power signal output part of given power circuit is connected with the power control circuit of independent pitch power control circuit, AC-DC bridge rectifier, and its given reactive power signals output is connected with the power control circuit of grid side DC-AC bridge-type inverter, their output of power control circuit of the power control circuit of the AC-DC bridge rectifier of independent pitch power control circuit, permanent-magnetic wind driven generator, grid side DC-AC bridge-type inverter is connected PWM bridge-type inverter pwm pulse input with the pwm pulse input that the propeller pitch angle of the wind turbine of permanent-magnetic wind driven generator group is controlled actuator, the controlled PWM bridge rectifier of three-phase respectively and is connected with three-phase.
2. the system that controls by given power under permanent-magnetic wind driven generator group full blast condition according to claim 1, it is characterized in that described independent pitch power control circuit comprises the power P I circuit of controlling propeller pitch angle, propeller pitch angle zero setting control circuit, the duplex double-throw diverter switch of the first wind-engaging speed control system, blade pitch angle drive circuit, wherein control the power P I circuit of propeller pitch angle, their output of propeller pitch angle zero setting control circuit and wind speed measuring circuit is connected with the duplex double-throw diverter switch of the first wind-engaging speed control system, the other end of the duplex double-throw diverter switch of the first wind-engaging speed control system is connected with blade pitch angle drive circuit, the output of blade pitch angle drive circuit is connected with wind turbine, the real-time active power signal output part of realtime power counting circuit is connected with the power P I circuit of controlling propeller pitch angle respectively with the given active power signal output part of given power circuit, control the power P I circuit of propeller pitch angle, propeller pitch angle zero setting control circuit, the output of wind speed measuring circuit is connected with the duplex double-throw diverter switch of the first wind-engaging speed control system, the output of the duplex double-throw diverter switch of the first wind-engaging speed control system is connected with blade pitch angle drive circuit, the slurry elongation actuator of blade pitch angle drive circuit and blade is connected.
3. the system that controls by given power under permanent-magnetic wind driven generator group full blast condition according to claim 2, the power control circuit that it is characterized in that the AC-DC bridge rectifier of described permanent-magnetic wind driven generator comprises: the first three phase static abc Coordinate Conversion is the change-over circuit of two-phase rotation dq coordinate, the interior ring PI control circuit based on Feedforward Decoupling of the first two-phase dq electric current, the first two-phase rotation dq Coordinate Conversion be three phase static abc coordinate sentence the accuser to the punishment facing the person he falsely accused the mark change-over circuit, the first three-phase PWM pulse generator, outer shroud PI power control circuit by given power control, calculate the optimized rotating speed circuit according to wind speed, encircle the PI control circuit in the rotating speed that limited by optimized rotating speed, the duplex double-throw diverter switch of the second wind-engaging speed control system, the rated speed circuit, ring PI control circuit in rated speed, wherein: three phase static abc Coordinate Conversion is that input and the rotor phase measuring circuit in the measurement filter circuit of the change-over circuit of two-phase rotation dq coordinate is connected output and is connected with the threephase stator current measurement circuit, the input based on the interior ring PI control circuit of Feedforward Decoupling of two-phase dq electric current is the change-over circuit of two-phase rotation dq coordinate with three phase static abc Coordinate Conversion, the output of the duplex double-throw diverter switch of the rotor speed measuring circuit in the measurement filter circuit and the second wind-engaging speed control system is connected, two-phase rotation dq Coordinate Conversion is being connected based on the interior ring PI control circuit of Feedforward Decoupling, the output of rotor phase measuring circuit, capacitor two ends DC voltage measuring circuit in the measurement filter circuit of the input of sentencing the accuser to the punishment facing the person he falsely accused the mark change-over circuit and two-phase dq electric current of three phase static abc coordinate, the input of three-phase PWM pulse generator is connected with the output of sentencing the accuser to the punishment facing the person he falsely accused the mark change-over circuit that two-phase rotation dq Coordinate Conversion is three phase static abc coordinate, the output of three-phase PWM pulse generator is connected with the controlled PWM bridge rectifier of three-phase, the input of pressing the outer shroud PI power control circuit of given power control is connected with the given active power signal output part of the real-time active power signal output part of realtime power counting circuit, given power circuit, the output of the wind speed measuring circuit in the input that calculates the optimized rotating speed circuit according to wind speed and measurement filter circuit is connected, the input that is subjected to ring PI control circuit in the rotating speed of optimized rotating speed restriction with measure filter circuit in rotor speed measuring circuit, the outer shroud PI power control circuit of controlling by given power, be connected according to the output of wind speed calculating optimized rotating speed circuit, the input of the duplex double-throw diverter switch of the second wind-engaging speed control system with measure filter circuit in wind speed measuring circuit, rated speed in ring PI control circuit, be connected by the output of ring PI control circuit in the rotating speed of optimized rotating speed restriction, rotor speed measuring circuit in rated speed in the input of ring PI control circuit and measurement filter circuit, the output of rated speed circuit are connected.
4. the system that controls by given power under permanent-magnetic wind driven generator group full blast condition according to claim 3, the power control circuit that it is characterized in that described grid side DC-AC bridge-type inverter comprises: the second three phase static abc Coordinate Conversion is the change-over circuit of two-phase rotation dq coordinate, the interior ring PI control circuit based on Feedforward Decoupling of the second two-phase dq electric current, the second two-phase rotation dq Coordinate Conversion be three phase static abc coordinate sentence the accuser to the punishment facing the person he falsely accused the mark change-over circuit, the second three-phase PWM pulse generator, the set-point circuit of capacitance terminal direct voltage, capacitance terminal voltage PI control circuit, reactive power PI control circuit, wherein: three phase static abc Coordinate Conversion is the input and the three-phase current measuring circuit of measuring inflow electrical network in filter circuit of the change-over circuit of two-phase rotation dq coordinate, the frequency signal of the three-phase voltage measuring circuit of grid nodes and the three-phase voltage of three-phase phase lock circuitry is connected output and is connected with phase signal, the input of capacitance terminal voltage PI control circuit with measure filter circuit in the output of set-point circuit of the voltage signal of capacitor two ends DC voltage measuring circuit and capacitance terminal direct voltage be connected, real-time reactive power signals output in the input of reactive power PI control circuit and power calculation circuit and the given reactive power signals output in given power circuit are connected, the input based on the interior circular current PI control circuit of Feedforward Decoupling of two-phase dq electric current is the change-over circuit of two-phase rotation dq coordinate with three phase static abc Coordinate Conversion, frequency signal, capacitance terminal voltage PI control circuit and their output of reactive power PI control circuit of the three-phase alternating voltage in the three-phase phase lock circuitry are connected, two-phase rotation dq Coordinate Conversion is being connected the output of voltage signal of capacitor two ends DC voltage measuring circuit with phase signal based on the interior circular current PI control circuit of Feedforward Decoupling, the frequency signal of three-phase voltage in the three-phase phase lock circuitry and being connected of the input of sentencing the accuser to the punishment facing the person he falsely accused the mark change-over circuit and two-phase dq electric current of three phase static abc coordinate, the input of three-phase PWM pulse generator is connected with the output of sentencing the accuser to the punishment facing the person he falsely accused the mark change-over circuit that two-phase rotation dq Coordinate Conversion is three phase static abc coordinate, and output is connected with the pwm pulse input of the controlled PWM bridge-type inverter of three-phase.
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| CN103166374A (en) * | 2013-03-21 | 2013-06-19 | 王少夫 | Chaos controlling and harmonic oscillation eliminating method for energy storage process of mechanical elastic energy storage (MEES) unit |
| CN103427441B (en) * | 2013-09-05 | 2015-04-22 | 东北大学 | Distributed hybrid new energy power generation and grid connection control device and method |
| CN104124710B (en) * | 2014-08-11 | 2016-03-02 | 四川慧盈科技有限责任公司 | A kind of wind-electricity integration progress control method based on power prediction |
| CN105337311B (en) * | 2015-12-01 | 2018-01-19 | 广西电网有限责任公司电力科学研究院 | A kind of permanent magnet direct drive synthronous wind-mill generator group for realizing low voltage crossing and its coordination control strategy |
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| CN102332728A (en) | 2012-01-25 |
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