CN102332728A - System for controlling permanent magnet wind generating set according to given power under full wind condition - Google Patents
System for controlling permanent magnet wind generating set according to given power under full wind condition Download PDFInfo
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Abstract
The invention discloses a system for controlling a permanent magnet wind generating set according to given power under the full wind condition, which comprises: the system comprises a measurement filter circuit, an independent variable pitch power control circuit, a power control circuit of an AC-DC bridge rectifier of a permanent magnet wind driven generator, a power control circuit of a DC-AC bridge inverter on the power grid side, a three-phase locking circuit, a real-time power calculation circuit based on three-phase locking and a given power circuit. The control system is a set of power control system which is controlled according to given power at full wind speed, can realize the control output according to the given power at strong wind speed through the coordinated operation of all parts, and can realize the tracking control according to the given power or the maximum wind power at weak wind speed, thereby being beneficial to the grid-connected operation of the system, being beneficial to the permanent magnet wind power system and other power generation systems with energy storage devices to participate in the frequency modulation of the system together, and further realizing the smooth power 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 power 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; The adjusting of wind generator system participation system frequency, active power, unit economic dispatch and electricity market running; 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 at random, intermittently; The fluctuation of power output is bigger, therefore, is set in given performance number based on average power content prediction, wind energy or less than mean value; Carry out 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 one type has various types of, complicated energy conversion system.Variable speed permanent magnetism wind power generation system becomes the important research and development direction of world's wind power generation field because of it has advantages such as energy conversion efficiency height, system reliability is high, the power that is incorporated into the power networks control is flexible, wind eddies wheel 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 rotating speed control that focuses on wind turbine generator of research and the control of following the trail of based on the strong wind power of rotating speed control.But, the Poewr control method of employing maximum power tracing, under full blast condition situation, because the randomness of wind energy, intermittence will cause the fluctuation of wind generator system power output big, and will be big to the influence of electrical network.In recent years; Existing scholar has proposed the control idea of the firm power control of band energy storage device; And apply to have in the power control system of double-fed wind power generator group of energy storage device; Describe as document [1] is middle ([1] Liyan Qu, 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 exported smoothly.In this method, what wind generator system still adopted is the Poewr control method by maximum power tracing, and like this, on the one hand, the fluctuation of power output of energy storage device that causes being used for power back-off is bigger, is unfavorable for the safety of energy storage device, stable operation; On the other hand, the wind generator system of the firm power of this band energy storage device control still can't be realized the control by given power, thus can't the participation system frequency, adjusting, unit economic dispatch and the electricity market running of 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; Power to realize the permanent magnetism wind power system is smoothly exported, functions such as the economic dispatch of realization 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 by given power control under the 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 realtime power counting circuit, the given power circuit of three-phase lock phase;
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; The output of described realtime power counting circuit based on three-phase lock phase comprises real-time active power signal output part and reactive power signals output in real time; The output of described given power circuit comprises given active power signal output part and given reactive power signals output;
Said 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 measurement 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 the filter circuit is connected on the measuring wind speed transducer 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 measurement circuit is connected on the dc voltage measurement transducer, and 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, and 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; The output of rotor phase measuring circuit, rotor speed measuring circuit and threephase stator current measurement circuit is 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 measurement 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 output of the three-phase current measuring circuit of inflow electrical network and the three-phase voltage measuring circuit of grid nodes is connected with the power control circuit and the realtime power counting circuit of grid side DC-AC bridge-type inverter; 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 with the controlled PWM bridge-type inverter of three-phase pwm pulse input with the pwm pulse input of the controlled PWM bridge rectifier of propeller pitch angle control executing mechanism, three-phase of the wind eddies of permanent-magnetic wind driven generator group wheel respectively.
Said independent pitch power control circuit comprises power P I circuit, propeller pitch angle zero setting control circuit, the duplex double-throw diverter switch of wind-engaging speed control system, the blade pitch angle drive circuit of controlling propeller pitch angle; Power P I circuit, propeller pitch angle zero setting control circuit and their output of wind speed measuring circuit of wherein controlling propeller pitch angle are 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 the wind eddies wheel; The real-time active power signal output part of power calculation circuit is connected with the power P I circuit of control propeller pitch angle respectively with the given active power signal output part of given power circuit; The output of the power P I circuit of control propeller pitch angle, propeller pitch angle zero setting control circuit, 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, and blade pitch angle drive circuit is connected with the slurry elongation actuator of blade.
The power control circuit of the AC-DC bridge rectifier of said permanent-magnetic wind driven generator comprises: three phase static abc Coordinate Conversion be change-over circuit, the interior ring PI control circuit based on the feedforward decoupling zero of two-phase dq electric current, the two-phase rotation dq Coordinate Conversion of two-phase rotation dq coordinate be three phase static abc coordinate sentence the accuser to the punishment facing the person he falsely accused mark change-over circuit, three-phase PWM pulse generator, by the outer shroud PI power control circuit of given power control, calculate the optimized rotating speed circuit, receive ring PI control circuit in the duplex double-throw diverter switch, rated speed circuit, rated speed of ring PI control circuit, wind-engaging speed control system in the rotating speed of optimized rotating speed restriction, wherein according to wind speed: three phase static abc Coordinate Conversion is that rotor phase measuring circuit and the output of threephase stator current measurement circuit in input and the measurement filter circuit of change-over circuit of two-phase rotation dq coordinate is connected; The input based on the interior ring PI control circuit of feedforward decoupling zero 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 that the input of sentencing the accuser to the punishment facing the person he falsely accused the mark change-over circuit of three phase static abc coordinate is connected with the interior ring PI control circuit based on the feedforward decoupling zero of two-phase dq electric current, the rotor phase measuring circuit in the measurement filter circuit, the output of capacitor two ends dc voltage measurement circuit; The input of three-phase PWM pulse generator and two-phase rotation dq Coordinate Conversion is that the output of sentencing the accuser to the punishment facing the person he falsely accused the mark change-over circuit of three phase static abc coordinate is connected; 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 the measurement filter circuit is connected; The input that receives ring PI control circuit in the rotating speed of optimized rotating speed restriction with measure filter circuit in the rotor speed measuring circuit, by the outer shroud PI power control circuit of given power control, 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 the rated speed in the input of ring PI control circuit and the measurement filter circuit, the output of rated speed circuit are connected.
The power control circuit of said grid side DC-AC bridge-type inverter comprises: three phase static abc Coordinate Conversion be change-over circuit, the interior circular current PI control circuit based on the feedforward decoupling zero of two-phase dq electric current, the two-phase rotation dq Coordinate Conversion of two-phase rotation dq coordinate be three phase static abc coordinate sentence the accuser to the punishment facing the person he falsely accused mark change-over circuit, 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 be two-phase rotation dq coordinate change-over circuit input with measure filter circuit in frequency signal and the output of phase signal of three-phase voltage of three-phase voltage measuring circuit and three-phase phase lock circuitry of three-phase current measuring circuit, grid nodes of inflow electrical network be connected; The input of capacitance terminal voltage PI control circuit with measure filter circuit in the output of set-point circuit of voltage signal and capacitance terminal direct voltage of capacitor two ends dc voltage measurement circuit be connected; Real-time reactive power signals output in the input of reactive power PI control circuit and the power calculation circuit and the given reactive power signals output in the given power circuit are connected; Input and the three phase static abc Coordinate Conversion based on the interior circular current PI control circuit of feedforward decoupling zero of two-phase dq electric current is that frequency signal, capacitance terminal voltage PI control circuit and their output of reactive power PI control circuit that the change-over circuit of dq coordinate, the three-phase alternating voltage in the three-phase phase lock circuitry are rotated in two-phase is connected; Two-phase rotation dq Coordinate Conversion is being connected based on the interior circular current PI control circuit of decoupling zero that feedovers, frequency signal and the output of the voltage signal of phase signal and capacitor two ends dc voltage measurement circuit of three-phase voltage in the three-phase phase lock circuitry 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 and two-phase rotation dq Coordinate Conversion is that the output of sentencing the accuser to the punishment facing the person he falsely accused the mark change-over circuit of three phase static abc coordinate is connected, and output is connected with the pwm pulse input of the controlled PWM bridge-type inverter of three-phase.
Control system among the present invention is under the cover full blast speed; Power control system by given power control; Coordinate operation through various piece can realize under the high wind speed by given power control output; The control that weak wind speed is followed the trail of by given power or strong wind power down helps system to be incorporated into the power networks, and helps permanent magnetism wind power system and other electricity generation systems with energy storage device participation system frequency modulation together; Thereby the power of realizing the permanent magnetism wind power system is smoothly exported, functions such as the economic dispatch of realization permanent-magnetic wind driven generator group and electricity market running.
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Description of drawings
Fig. 1 is by the structured flowchart of the system of given power control under the 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 among 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 among the present invention.
Fig. 4 is the structured flowchart of the power control circuit of grid side DC-AC bridge-type inverter among the present invention.
Fig. 5 is the change curve of the per unit value of wind turbine generator power output with blade angle speed.
Embodiment
As shown in Figure 1; The permanent-magnetic wind driven generator group comprises the blade of wind eddies wheel; The wind eddies wheel directly links to each other or links to each other (selection directly links to each other in this example) through simple gearbox through the rotor of wheel hub and permanent magnet generator; The threephase stator coil of permanent magnet generator links to each other with the controlled PWM bridge rectifier of three-phase AC side; The DC side of the controlled PWM bridge rectifier of three-phase and a capacitor are in parallel, and are parallel to the DC side of the controlled PWM bridge-type inverter of three-phase then, and the AC side of the controlled PWM bridge-type inverter of three-phase inserts electrical network through a three pole reactor filter.System by the control of given power under the 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 realtime power counting circuit 6, the given power circuit 7 of three-phase lock phase; 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; The output of described realtime power counting circuit 6 based on three-phase lock phase comprises real-time active power signal output part and reactive power signals output in real time; The output of described given power circuit 7 comprises given active power signal output part and given reactive power signals output; Said 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 measurement circuit 45, the three-phase current measuring circuit 46 that flows into 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 the filter circuit 4 is connected on the measuring wind speed transducer 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 measurement circuit 45 is connected on the dc voltage measurement transducer, and 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, and 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 of rotor phase measuring circuit 42, rotor speed measuring circuit 43 and threephase stator current measurement circuit 44 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 measurement 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 output of the three-phase current measuring circuit 46 of inflow electrical network and the three-phase voltage measuring circuit 47 of grid nodes is connected with the power control circuit 3 and the realtime power counting circuit 6 of grid side DC-AC bridge-type inverter; 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 with the controlled PWM bridge-type inverter of three-phase pwm pulse input with the pwm pulse input of the controlled PWM bridge rectifier of propeller pitch angle control executing mechanism, three-phase of the wind eddies wheel of permanent-magnetic wind driven generator group respectively.
The structure chart of independent pitch power control circuit 1 is shown in the empty frame among Fig. 2; Comprise power P I circuit 11, propeller pitch angle zero setting control circuit 12, the duplex double-throw diverter switch 13 of wind-engaging speed control system, the blade pitch angle drive circuit 14 of controlling propeller pitch angle; Their output of power P I circuit 11, propeller pitch angle zero setting control circuit 12 and wind speed measuring circuit 41 of wherein controlling propeller pitch angle 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 the wind eddies wheel; The real-time active power signal output part of power calculation circuit 6 is connected with the power P I circuit 11 of control propeller pitch angle respectively with the given active power signal output part of given power circuit 7; The output of the power P I circuit 11 of control propeller pitch angle, propeller pitch angle zero setting control circuit 12, 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, and blade pitch angle drive circuit 14 is connected with the slurry elongation actuator of blade.
The circuit structure of the power control circuit 2 of the AC-DC bridge rectifier of permanent-magnetic wind driven generator is shown in the empty frame on right side among Fig. 3; Comprise: three phase static abc Coordinate Conversion be change-over circuit 21, the interior ring PI control circuit 22 based on the feedforward decoupling zero of two-phase dq electric current, the two-phase rotation dq Coordinate Conversion of two-phase rotation dq coordinate be three phase static abc coordinate sentence the accuser to the punishment facing the person he falsely accused mark change-over circuit 23, three-phase PWM pulse generator 24, by the outer shroud PI power control circuit 25 of given power control, calculate optimized rotating speed circuit 26, receive ring PI control circuit 20 in the duplex double-throw diverter switch 28, rated speed circuit 29, rated speed of ring PI control circuit 27, wind-engaging speed control system in the rotating speed of optimized rotating speed restriction, wherein according to wind speed: three phase static abc Coordinate Conversion is that rotor phase measuring circuit 42 and the output of threephase stator current measurement circuit 44 in input and the measurement filter circuit 4 of change-over circuit 21 of two-phase rotation dq coordinate is connected; The input based on the interior ring PI control circuit 22 of feedforward decoupling zero 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 the measurement filter circuit 4 and wind-engaging speed control system is connected; Two-phase rotation dq Coordinate Conversion is that the input of sentencing the accuser to the punishment facing the person he falsely accused mark change-over circuit 23 of three phase static abc coordinate is connected with the interior ring PI control circuit 22 based on the feedforward decoupling zero of two-phase dq electric current, the rotor phase measuring circuit 42 in the measurement filter circuit 4, the output of capacitor two ends dc voltage measurement circuit 45; The input of three-phase PWM pulse generator 24 and two-phase rotation dq Coordinate Conversion is that the output of sentencing the accuser to the punishment facing the person he falsely accused mark change-over circuit 23 of three phase static abc coordinate is connected; 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 the measurement filter circuit 4 is connected; The input that receives 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, by the outer shroud PI power control circuit 25 of given power control, 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 the rated speed in the input of ring PI control circuit 20 and the 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 shown in the empty frame on right side among 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 be change-over circuit 31, the interior circular current PI control circuit 32 based on the feedforward decoupling zero of two-phase dq electric current, the two-phase rotation dq Coordinate Conversion of two-phase rotation dq coordinate be three phase static abc coordinate sentence the accuser to the punishment facing the person he falsely accused mark 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 be two-phase rotation dq coordinate change-over circuit 31 input with measure filter circuit 4 in frequency signal and the output of phase signal of three-phase alternating voltage of three-phase voltage measuring circuit 47 and three-phase phase lock circuitry 5 of three-phase current measuring circuit 46, grid nodes of inflow electrical network be connected; The input of capacitance terminal voltage PI control circuit 36 with measure filter circuit 4 in the output of set-point circuit 35 of voltage signal and capacitance terminal direct voltage of capacitor two ends dc voltage measurement circuit 45 be connected; Real-time reactive power signals output in the input of reactive power PI control circuit 37 and the power calculation circuit 6 and the given reactive power signals output in the 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 zero of two-phase dq electric current whether the frequency signal that the change-over circuit 31 of dq coordinate, the three-phase alternating voltage in the three-phase phase lock circuitry 5 are rotated in two-phase (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 based on the interior circular current PI control circuit 32 of decoupling zero that feedovers, the output of voltage signal of output and capacitor two ends dc voltage measurement circuit 45 of frequency signal and phase signal of three-phase alternating voltage in the three-phase phase lock circuitry 5 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 and two-phase rotation dq Coordinate Conversion is that the output of sentencing the accuser to the punishment facing the person he falsely accused mark change-over circuit 33 of three phase static abc coordinate is connected, 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 current measuring circuit 46 of the inflow electrical network in the measurement filter circuit 4 and the three-phase voltage measuring circuit 47 of grid nodes are measured the controlled PWM bridge-type inverter of three-phase respectively and are transported to three-phase current signal and three-phase voltage signal on the electrical network; Through power calculation circuit 6 based on three-phase lock phase; Calculate the realtime power signal that is transported on the electrical network; Real-time active power signal wherein and the given active power signal in the given power circuit 7 and from the wind velocity signal of wind speed measuring circuit 41 are delivered to independent pitch power control circuit 1 together; Active power signal and given active power signal are admitted in the power P I circuit 11 of control 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 control its switch 13, when wind velocity signal during greater than rated wind speed, diverter switch 13 is selected power P I circuit 11; Realize under the high wind speed, by the control of given power.When wind velocity signal was lower than rated wind speed, diverter switch 13 was selected propeller pitch angle zero setting control circuit 12, realized under the weak wind speed control (referring to Fig. 2) of drawing wind energy as much as possible.
See Fig. 1,3; Measure 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 measurement circuit 45 in the filter circuit 4; Respectively the d. c. voltage signal at the rotor phase signal of the wind velocity signal of measuring gained, permanent magnet generator, rotor speed signal, threephase stator current signal, rectifier DC lateral capacitance two ends; And the real-time active power signal that calculates based on the power calculation circuit 6 of three-phase lock 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; Convert stator three-phase abc ac current signal into two-phase dq dc current signal, again with given two-phase dq current value and rotor speed signal together, through the interior ring PI control circuit 22 based on the feedforward decoupling zero of 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 side dc voltage value, the d. c. voltage signal at this value and rotor phase signal and rectifier DC lateral capacitance two ends are 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 together again; Convert the needed three-phase abc of AC-DC bridge rectifier AC side ac voltage to; This three-phase voltage value magnitude of voltage as a reference, deliver to three-phase PWM pulse generator 24 at last, produce the PWM control wave of the AC-DC bridge rectifier of control corresponding permanent-magnetic wind driven generator.The interior circular current PI control that the two-phase dq electric current of foregoing circuit formation permanent magnet generator threephase stator electric current is pressed set-point; Because d shaft current component is being represented the idle component of threephase stator electric current; Q shaft current component is being represented the real component of threephase stator electric current; And the active current component is being represented the size of electromagnetic torque, thereby has realized the control to permanent magnet generator reactive current and electromagnetic torque.Among the present invention, be to improve the electromagnetism utilance of permanent magnet generator, the reactive current component just d shaft current component be controlled to be zero, only carry out electromagnetic torque just 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 by given power control; Its output is as the rotary speed setting value of ring PI control circuit 27 in the rotating speed that receives the optimized rotating speed restriction; Thereby realize coming through rotating speed the purpose of power controlling, optimized rotating speed then is to calculate by calculating the mathematical formulae that presets in the optimized rotating speed circuit 26 according to wind speed.Given rated speed circuit 29 is delivered to ring PI control circuit 20 in the rated speed; Encircle the output of ring PI control circuit 20 in PI control circuit 27 and the 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 control its switch 28 of wind speed measuring circuit 41 is selected ring PI control circuit 20 in the rated speed, and its output is as the interior given q shaft current value of encircling PI control circuit 22 based on the feedforward decoupling zero of two-phase dq electric current, through the control of internal ring q shaft current; Realization is to the control of the electromagnetic torque of permanent magnet generator, thereby realizes including the control based on the permanent magnet generator rated speed of dicyclo PI control based on the interior ring PI control circuit 22 of feedforward decoupling zero of ring PI control circuit 20, two-phase dq electric current in the rated speed.When weak wind speed; Encircle PI control circuit 27 in the rotating speed that wind velocity signal control its switch 28 is selected limited by optimized rotating speed; Equally; Through the control based on the given q shaft current value of the interior ring PI control circuit 22 of feedforward decoupling zero of internal ring two-phase dq electric current, realize including outer shroud PI power control circuit 25 by given power control, receive ring PI control circuit 27 and two-phase dq electric current in the rotating speed of optimized rotating speed restriction based on the interior ring PI control circuit 22 of feedforward decoupling zero based on the control of the permanent magnet generator of three ring PI controls by given power.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, therefore can realize power control sane under the full blast condition.
See Fig. 1,4; Measure the capacitor two ends dc voltage measurement circuit 45 in the filter circuit 4, the three-phase current measuring circuit 46 that flows into electrical network and the three-phase voltage measuring circuit 47 of grid nodes and measure 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 the grid nodes respectively, 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 the frequency signal and the phase signal of three-phase voltage signal respectively 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 three-phase lock realtime power counting circuit 6 mutually, 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 a two-phase rotation dq coordinate from the frequency signal and the phase signal of the three-phase voltage signal of three-phase phase lock circuitry 5; Convert three-phase alternating current abc voltage and current signal into 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 reactive power PI control circuit 37 given two-phase dq axle dc current signal together; Interior circular current PI control circuit 32 through two-phase dq electric current based on the feedforward decoupling zero; 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 side; 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; Through 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; Convert two-phase dq dc voltage value to three-phase abc ac voltage, deliver to three-phase PWM pulse generator 34, produce the control three-phase current signal and reach the pairing pwm pulse signal of needed given current value as the three-phase alternating current reference voltage level.What foregoing circuit was realized is the interior ring PI control of grid side DC-AC bridge-type inverter two-phase dq shaft current; Because interior ring d shaft current is being represented the active power component of bridge-type inverter transfer power; Interior ring q shaft current is being represented the reactive power component of bridge-type inverter transfer power, therefore, regulates 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.
The capacitor two ends dc voltage value that capacitor two ends dc voltage measurement circuit 45 in the measurement filter circuit 4 measures and the set-point 35 of capacitance terminal direct voltage are connected in the 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 zero; Because the d shaft current is being represented 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 voltage.Real-time reactive power signals and the given reactive power signals in the given power circuit 7 in the 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 zero; Because the q shaft current is directly being represented 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 the said system all adopt prior art, and physical circuit repeats no more at this.
Be used among 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 pairing wind turbine generator be controlled under the situation of rated speed, the electromagnetic power of output is a rated power, this moment, pairing a certain wind speed was defined as rated wind speed; With the rated wind speed is the boundary, according to the wind velocity signal value of actual measurement, divides two kinds of situation to control:
1) when the measured wind velocity signal of wind speed measuring circuit 41 when rated wind speed is above; Wind eddies impeller blade propeller pitch angle drive circuit 14 in the independent pitch power control circuit 1 is selected the power P I circuit 11 by given active power control propeller pitch angle through the duplex double-throw diverter switch 13 of a wind-engaging speed control system; Size through regulating propeller pitch angle is controlled the size that wind energy converts mechanical energy into, thereby realizes the control by given active power; Simultaneously; The interior ring PI control circuit 22 based on the feedforward decoupling zero 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 the rated speed through the duplex double-throw diverter switch 28 of a wind-engaging speed control system; Constituting outer shroud is rotating speed control; Interior ring is the control of active current q axle component, realizes the dicyclo PI control of rated speed.
2) the measured wind velocity signal of wind speed measuring circuit 41 is when rated wind speed is following; Wind eddies impeller blade propeller pitch angle drive circuit 14 in the independent pitch power control circuit 1 is selected propeller pitch angle zero setting control circuit 12 through the duplex double-throw diverter switch 13 of a wind-engaging speed control system; The control propeller pitch angle is zero, converts mechanical energy into thereby control wind energy as much as possible; Simultaneously; Two-phase dq electric current in the power control circuit 2 of the AC-DC bridge rectifier of permanent-magnetic wind driven generator select to receive ring PI control circuit 27 in the rotating speed of optimized rotating speed restriction through the duplex double-throw diverter switch 28 of a wind-engaging speed control system and by the outer shroud PI power control circuit 25 of given power control based on the interior ring PI control circuit 22 of feedforward decoupling zero; Constituting outer shroud is power control; Middle ring is controlled for the rotating speed that receives the optimized rotating speed restriction; In ring be the power control circuit based on three ring PI controls of dq shaft current control, the purpose of exporting by given power control permanent magnetism wind power generation system power when realizing weak wind speed.At this moment, be divided into two kinds of situation again:
A) when wind power is sufficient; Just absorbent strong wind power is greater than given power the time; Through the power control circuit of aforesaid three ring PI controls, 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 because the influence of the randomness of wind power and intermittent caused power crest disturbance to 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 of the ring of three in the power control circuit 2 of the AC-DC bridge rectifier of permanent-magnetic wind driven generator PI control can make the set-point of ring PI control circuit 27 in the rotating speed that receives the optimized rotating speed restriction increase all the time, thus the increase of control rotating speed.If do not limit the increase of rotating speed; Rotating speed will increase on the maximum speed value that can not increase again, at this moment above optimized rotating speed; 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 be lower than the pairing peak power output value of optimized rotating speed, causes when wind is under powered, and is bigger to recessed power fluctuation.Therefore; This to recessed fluctuation in order to weaken, method of the present invention is to utilize aforementioned power control circuit based on three ring PI controls not only to control rotating speed, but also controlled the characteristics of electromagnetic torque, and the restriction rotating speed is in the pairing optimized rotating speed scope of this wind speed; When wind is under powered; Rotating speed is limited on the optimized rotating speed value, realizes the tracking of strong wind power automatically, thus weakened owing to be not strong wind power follow the trail of cause by a larger margin to recessed power fluctuation.
3) optimized rotating speed confirms to utilize to calculate according to wind speed and presets that computing formula gets in the optimized rotating speed circuit 26.Calculate optimized rotating speed according to formula, in the formula,, be wind eddies impeller blade radius for the specific wind eddies wheel optimum tip speed ratio that unit had; Also can calculate optimized rotating speed according to the fitting function relational expression of resulting optimized rotating speed of wind power generation operating experience and wind speed.
4) in the aforementioned whole control process; The capacitor two ends dc voltage value that the set-point 35 and the capacitor two ends dc voltage measurement circuit 45 of the capacitance terminal direct voltage in the power control circuit 3 of grid side DC-AC bridge-type inverter measures; Interior circular current PI control circuit 32 through capacitance terminal direct voltage PI control circuit 36 and feedforward decoupling zero; Realize regulating the size of the active power that is delivered to electrical network; The dicyclo PI control of constant capacitance device two ends direct voltage, thus the direct voltage that remains the capacitor two ends is a steady state value; Real-time reactive power signals in the realtime power counting circuit 6 and the given reactive power signals in the given power circuit 7 are then passed through the interior circular current PI control circuit 32 of reactive power PI control circuit 37 and feedforward decoupling zero; Control is delivered to the reactive power of electrical network, realizes the purpose by given Reactive Power Control based on dicyclo PI control.
Claims (4)
- Under a kind of permanent-magnetic wind driven generator group full blast condition by the system of given power control, it 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 realtime power counting circuit, the given power circuit of three-phase lock phase; 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; The output of described realtime power counting circuit based on three-phase lock phase comprises real-time active power signal output part and reactive power signals output in real time; The output of described given power circuit comprises given active power signal output part and given reactive power signals output; Said 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 measurement 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 the filter circuit is connected on the measuring wind speed transducer 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 measurement circuit is connected on the dc voltage measurement transducer, and 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, and 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; The output of rotor phase measuring circuit, rotor speed measuring circuit and threephase stator current measurement circuit is 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 measurement 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 output of the three-phase current measuring circuit of inflow electrical network and the three-phase voltage measuring circuit of grid nodes is connected with the power control circuit and the realtime power counting circuit of grid side DC-AC bridge-type inverter; 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 with the controlled PWM bridge-type inverter of three-phase pwm pulse input with the pwm pulse input of the controlled PWM bridge rectifier of propeller pitch angle control executing mechanism, three-phase of the wind eddies of permanent-magnetic wind driven generator group wheel respectively.
- 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 said independent pitch power control circuit comprises power P I circuit, propeller pitch angle zero setting control circuit, the duplex double-throw diverter switch of wind-engaging speed control system, the blade pitch angle drive circuit of controlling propeller pitch angle; Power P I circuit, propeller pitch angle zero setting control circuit and their output of wind speed measuring circuit of wherein controlling propeller pitch angle are 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 the wind eddies wheel; The real-time active power signal output part of power calculation circuit 6 is connected with the power P I circuit of control propeller pitch angle respectively with the given active power signal output part of given power circuit 7; The output of the power P I circuit of control propeller pitch angle, propeller pitch angle zero setting control circuit, 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, and blade pitch angle drive circuit is connected with the slurry elongation actuator of blade.
- 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 said permanent-magnetic wind driven generator comprises: three phase static abc Coordinate Conversion be change-over circuit, the interior ring PI control circuit based on the feedforward decoupling zero of two-phase dq electric current, the two-phase rotation dq Coordinate Conversion of two-phase rotation dq coordinate be three phase static abc coordinate sentence the accuser to the punishment facing the person he falsely accused mark change-over circuit, three-phase PWM pulse generator, by the outer shroud PI power control circuit of given power control, calculate the optimized rotating speed circuit, receive ring PI control circuit in the duplex double-throw diverter switch, rated speed circuit, rated speed of ring PI control circuit, wind-engaging speed control system in the rotating speed of optimized rotating speed restriction, wherein according to wind speed: three phase static abc Coordinate Conversion is that rotor phase measuring circuit and the output of threephase stator current measurement circuit in input and the measurement filter circuit of change-over circuit of two-phase rotation dq coordinate is connected; The input based on the interior ring PI control circuit of feedforward decoupling zero 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 that the input of sentencing the accuser to the punishment facing the person he falsely accused the mark change-over circuit of three phase static abc coordinate is connected with the interior ring PI control circuit based on the feedforward decoupling zero of two-phase dq electric current, the rotor phase measuring circuit in the measurement filter circuit, the output of capacitor two ends dc voltage measurement circuit; The input of three-phase PWM pulse generator and two-phase rotation dq Coordinate Conversion is that the output of sentencing the accuser to the punishment facing the person he falsely accused the mark change-over circuit of three phase static abc coordinate is connected; 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 the measurement filter circuit is connected; The input that receives ring PI control circuit in the rotating speed of optimized rotating speed restriction with measure filter circuit in the rotor speed measuring circuit, by the outer shroud PI power control circuit of given power control, 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 the rated speed in the input of ring PI control circuit and the 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 said grid side DC-AC bridge-type inverter comprises: three phase static abc Coordinate Conversion be change-over circuit, the interior circular current PI control circuit based on the feedforward decoupling zero of two-phase dq electric current, the two-phase rotation dq Coordinate Conversion of two-phase rotation dq coordinate be three phase static abc coordinate sentence the accuser to the punishment facing the person he falsely accused mark change-over circuit, 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 be two-phase rotation dq coordinate change-over circuit input with measure filter circuit in frequency signal and the output of phase signal of three-phase voltage of three-phase voltage measuring circuit and three-phase phase lock circuitry of three-phase current measuring circuit, grid nodes of inflow electrical network be connected; The input of capacitance terminal voltage PI control circuit with measure filter circuit in the output of set-point circuit of voltage signal and capacitance terminal direct voltage of capacitor two ends dc voltage measurement circuit be connected; Real-time reactive power signals output in the input of reactive power PI control circuit and the power calculation circuit and the given reactive power signals output in the given power circuit are connected; Input and the three phase static abc Coordinate Conversion based on the interior circular current PI control circuit of feedforward decoupling zero of two-phase dq electric current is that frequency signal, capacitance terminal voltage PI control circuit and their output of reactive power PI control circuit that the change-over circuit of dq coordinate, the three-phase alternating voltage in the three-phase phase lock circuitry are rotated in two-phase is connected; Two-phase rotation dq Coordinate Conversion is being connected based on the interior circular current PI control circuit of decoupling zero that feedovers, frequency signal and the output of the voltage signal of phase signal and capacitor two ends dc voltage measurement circuit of three-phase voltage in the three-phase phase lock circuitry 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 and two-phase rotation dq Coordinate Conversion is that the output of sentencing the accuser to the punishment facing the person he falsely accused the mark change-over circuit of three phase static abc coordinate is connected, and output is connected with the pwm pulse input of the controlled PWM bridge-type inverter of three-phase.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN103362738A (en) * | 2012-04-11 | 2013-10-23 | 北京能高自动化技术股份有限公司 | Maximum power tracking control method of variable speed and variable pitch wind generating set based on feedforward decoupling control |
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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 |
| CN103427441A (en) * | 2013-09-05 | 2013-12-04 | 东北大学 | Distributed hybrid new energy power generation and grid connection control device and method |
| CN104124710A (en) * | 2014-08-11 | 2014-10-29 | 四川慧盈科技有限责任公司 | Wind-power integrated operation control method based on power prediction |
| 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 |
| CN105337311A (en) * | 2015-12-01 | 2016-02-17 | 广西电网有限责任公司电力科学研究院 | Permanent-magnet direct-drive wind turbine generator set with low voltage ride through capability and coordination control strategy thereof |
| 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 |
| WO2018228904A1 (en) * | 2017-06-13 | 2018-12-20 | Wobben Properties Gmbh | Wind turbine comprising a gearless generator and a generator filter |
| CN110741158A (en) * | 2017-06-13 | 2020-01-31 | 乌本产权有限公司 | Wind energy installation with gearless generator and generator filter |
| US11353004B2 (en) | 2017-06-13 | 2022-06-07 | Wobben Properties Gmbh | Wind turbine comprising a gearless generator and a generator filter |
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