CN102843085B - Double-feed fan excitation control device and control method thereof - Google Patents
Double-feed fan excitation control device and control method thereof Download PDFInfo
- Publication number
- CN102843085B CN102843085B CN201210365686.5A CN201210365686A CN102843085B CN 102843085 B CN102843085 B CN 102843085B CN 201210365686 A CN201210365686 A CN 201210365686A CN 102843085 B CN102843085 B CN 102843085B
- Authority
- CN
- China
- Prior art keywords
- excitation
- control device
- rotor
- generator
- grid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention relates to a control device and a control method thereof, in particular to a double-feed fan excitation control device and a control method thereof. The double-feed fan excitation control device is characterized by comprising a wind power characteristic simulation device, and an AC excitation power generation device and a DSP (Digital Signal Processor) control device which are respectively connected with the wind power characteristic simulation device, an excitation potential device is also connected to the DSP control device, and the excitation potential device is connected with the AC excitation power generation device through an excitation conversion switch. Therefore, the double-feed fan excitation control device and the control method thereof disclosed by the invention have the advantages of reasonable design, simple design, complete practicability and capacities of being used for simulating a wind power generation system of a speed-variable constant-frequency AC excitation double-feed power generator and being used for teaching and scientific research.
Description
Technical field
The present invention relates to a kind of control device and control method thereof, especially relate to a kind of double-fed fan excitation control device and control method thereof.
Background technology
Wind-powered electricity generation as a kind of important regenerative resource, to alleviation world energy sources crisis and ecological deterioration significant.Current, a large amount of human and material resources and financial resources have all been dropped in countries in the world, actively develop the research to wind power technology.The wind power generation simulation experiment system that analogue technique is built is adopted in laboratory, can realize wind energy turbine set, the simulation of wind energy conversion system and wind-driven generator and control system thereof, for the research of wind power technology, especially be wind-driven generator and control technology thereof, interconnection technology, low voltage crossing control technology, maximum wind powerinjected method technology, the researchs such as the energy storage suppressing wind power to fluctuate and control technology thereof, provide very convenient research platform, but, present research and teaching is also not used for the wind generator system of the AC excitation double-fed wind-driven generator of simulation variable speed constant frequency.
Summary of the invention
The present invention mainly solves the technical problem existing for prior art; Provide a kind of wind generator system of the AC excitation double-fed wind-driven generator for simulating variable speed constant frequency, for a kind of double-fed fan excitation control device and the control method thereof of teaching and scientific research.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals:
A kind of double-fed fan excitation control device, it is characterized in that, comprise wind characteristic analogue means, the ac excitation generating device be connected with wind characteristic analogue means respectively and DSP control device, described DSP control device is also connected with an excitation potential device, and described excitation potential device is connected with described ac excitation generating device by an excitation change over switch.
Wire-wound asynchronous motor: rotor is winding-type, usual employing AC excitation mode, realize variable speed constant frequency by the frequency changing AC excitation electric current to run, its speed adjustable range is synchronous speed ± 30%, be greatly improved compared with squirrel cage motor, therefore can comparatively good utilisation wind energy, the optimum efficiency realizing below rated wind speed is run; Rotor-exciting converter adopts back-to-back pair of SPWM converter, can two-way transmission slip power, therefore the maximum working capacity of converter is exactly maximum slip capacity, the i.e. capacity motor of 30%, compared with stator side total power converter capacity, converter capacity relative is less, and volume is little, lightweight.The features such as AC excitation double-fed wind generator system has high efficiency, and Large Copacity, converter capacity are less, are widely used in actual wind generator system.
In above-mentioned a kind of double-fed fan excitation control device, the ac excited generator that described ac excitation generating device is comprised a separate excitation DC generator and is connected with described wind characteristic analogue means by separate excitation DC generator.
In above-mentioned a kind of double-fed fan excitation control device, the grid side dsp controller that described DSP control device is comprised a rotor-side dsp controller and is connected with ac excited generator with above-mentioned separate excitation DC generator by described rotor-side dsp controller simultaneously.
In above-mentioned a kind of double-fed fan excitation control device, the excitation transformer that described excitation potential device is comprised a flat ripple reactance and is connected with above-mentioned grid side dsp controller by flat ripple reactance.
In above-mentioned a kind of double-fed fan excitation control device, this double-fed fan excitation control device also comprises the grid-connected switch that a main transformer and one end are connected with above-mentioned ac excited generator by main transformer, and the described grid-connected switch other end is connected with electrical network.
In above-mentioned a kind of double-fed fan excitation control device, above-mentioned excitation change over switch is connected to above-mentioned ac excited generator, excitation transformer and civil power.
Adopt a control method for double-fed fan excitation control device, it is characterized in that, comprise the following steps:
Step 1, in inactive state, the power supply of DC bus has single-phase rectification bridge to provide, and operator sends grid side start-up command, if it encourages mode grid side control device automatically DC bus-bar voltage can be adjusted to set point.What grid side control device and rotor-side control device adopted is sinusoidal pulse width modulation.If from shunt excitation mode, grid side control device can not adjust voltage, and the power supply of DC bus is still provided by the single-phase rectification bridge in cabinet.
Step 2, operator could send excitation instruction to rotor-side control device after step 2 performs, and the rotating speed of rotor-side control device meeting automatic monitoring unit, only have and just automatic excitation can build pressure (acquiescence excitation rotating speed is 80% synchronous speed) when generating unit speed exceedes synchronous speed 70%.The function of rotor-side control device follows the tracks of rotor speed to make the output voltage frequency of rotor-side frequency converter be the difference of synchronizing frequency and rotating speed, thus realize asynchronous generating.Now grid side and rotor-side control to actually constitute an ac-dc-ac frequency converter.If from shunt excitation mode, in 3 ~ 5 seconds that just build pressure, DC bus power is still provided by single-phase rectification bridge, after set end voltage reaches rated value, DC bus-bar voltage can be adjusted to set point by grid side control device automatically, makes single-phase rectification bridge not reoffer power.Rotor-side controller can monitoring motor rotating speed always, once rotating speed is lower than the i.e. automatic field suppressing of synchronous war speed 70%.
Step 3, operator can set about generator to be incorporated to infinitely great electrical network after Generator end builds pressure, and this device does not provide grid-connected switching mechanism, only has and network interface.Synchronizing frequency can be remained on by infinitely great electrical network in grid-connected rear machine end frequency, now change rotor excited voltage frequency and can change motor speed.And if motor speed is higher than synchronizing frequency, then the power flow direction of ac-dc-ac inverter system will be from rotor to electrical network, then contrary lower than synchronizing frequency, thus realize doubly-fed generation.
Therefore, tool of the present invention has the following advantages: 1. reasonable in design, and structure is simply and completely practical; 2. can be used in the wind generator system of the AC excitation double-fed wind-driven generator of simulating variable speed constant frequency, for teaching and scientific research.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present invention.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment:
A kind of double-fed fan excitation control device, comprise wind characteristic analogue means, the ac excitation generating device be connected with wind characteristic analogue means respectively and DSP control device, described DSP control device is also connected with an excitation potential device, and described excitation potential device is connected with described ac excitation generating device by an excitation change over switch.AC excitation double-fed wind generator system major loop structure schematic diagram as shown in Figure 1.The stator of double-fed generator is directly connected with common frequency power network, and rotor then can be connected with electrical network by the AC-DC-AC system that forms of two back-to-back SPWM converters (grid side converter and rotor-side converter) of two-way flow by energy.Wherein, AC excitation double-fed wind power generator exciting control system is if figure is by back-to-back pair of SPWM converter, form based on the excitation controller of TMS320F2812 and the unit such as excitation transformer, AC excitation double-feedback generator.
The ac excited generator that ac excitation generating device is comprised a separate excitation DC generator and is connected with described wind characteristic analogue means by separate excitation DC generator; The grid side dsp controller that DSP control device is comprised a rotor-side dsp controller and is connected with ac excited generator with above-mentioned separate excitation DC generator by described rotor-side dsp controller simultaneously; The excitation transformer that excitation potential device is comprised a flat ripple reactance and is connected with above-mentioned grid side dsp controller by flat ripple reactance; This double-fed fan excitation control device also comprises the grid-connected switch that a main transformer and one end are connected with above-mentioned ac excited generator by main transformer, the described grid-connected switch other end is connected with electrical network, and excitation change over switch is connected to above-mentioned ac excited generator, excitation transformer and civil power.
The interchange end of grid side converter (frequency ± 15Hz, capacity 3kVA) is connected with electrical network by excitation transformer, DC side then with the DC side parallel of rotor-side converter.The main task of grid side converter is the voltage stabilization maintaining converter DC side; Grid side converter adopts PQ decoupling control policy, the PQ four quadrant running of converter AC can be realized, there is provided exciting power and slip power when rotor metasynchronism speed is run to rotor, when the supersynchronous speed of rotor is run, the slip power that rotor exports is sent to electrical network.Also can exchange reactive power according to electrical network to the demand of reactive power and electrical network, but be generally reduction converter capacity and operate in unity power factor state; Its operation principle: frequently, phase sequence automatic Identification adapts to frequency-tracking net automatically; The variable frequency control of SPWM adopts constant carrier than the mode frequency modulation changing carrier cycle, the sinusoid pulse width modulation value obtained in each carrier cycle of tabling look-up.Adopt synchronous with line voltage, the method changing the relative electric network voltage phase of modulating wave carries out phase modulation, to change active power direction of transfer and size, maintains DC voltage stability on given level.
The DC side of rotor-side converter (frequency 50 ± 1Hz, capacity 3kVA) and the DC side parallel of grid side converter, its AC is connected with the rotor windings of double-fed generator.Main task is for double-fed generator provides the exciting current of suitable amplitude and frequency, realizes the stability contorting of generator terminal voltage, is responsible for the reasonable distribution of reactive power between parallel running unit, realize maximal wind-energy powerinjected method etc.Its operation principle: automatically determine exciting current frequency and phase sequence according to net frequency and rotating speed before grid-connected, follow the tracks of grid-connected phase place, follow the tracks of grid voltage amplitude, be as the criterion synchronously grid-connected creating conditions; Grid-connected rear maintenance exciting current frequency is constant, or by manual adjustment, or automatically adjusted by maximum power tracing functional software; Determine voltage (determining electric current) when controlling, according to the size of the automatic regulation output exciting current of voltage (electric current) deviation, to maintain set end voltage (exciting current) on given level.Adopt the mode frequency modulation of constant carrier cyclomorphosis frequency of modulated wave.
The controller of two SPWM converter, employing be current state-of-the-art 32 fixed-point type digital signal processor (DSP) TMS320F2812 in the world, this DSP dominant frequency is up to 150MHz, Harvard's bus, pipeline organization, fast operation, precision is high, aboundresources in sheet, powerful.
Excitation transformer primary responsibility coupling rotor voltage and stator voltage, transmit slip power and provide exciting power.Excitation transformer is attempted by Generator end and can forms shunt self excitation mode, be attempted by and electrical network can form it encourage excitation mode;
10 absolute optical encoders that this device adopts Autonics company to produce, to obtain rotor actual position signal accurately, realize vector control, ensure to export electric energy constant frequency and constant voltage.Accurately, rotor-position signal is the necessary condition that high-performance variable speed constant frequency doubly-fed generation system is normally run reliably.
AC excitation double-feedback generator adopts the wire wound asynchronous motor of Electric Traction, for making its control performance more close to similar generator, rated voltage derate being used (rated voltage reduces to 300V by 380V), makes electromagnetic property more close to actual conditions.
During operation, comprise the following steps:
Step 1, in inactive state, the power supply of DC bus has single-phase rectification bridge to provide, and operator sends grid side start-up command, if it encourages mode grid side control device automatically DC bus-bar voltage can be adjusted to set point.What grid side control device and rotor-side control device adopted is sinusoidal pulse width modulation.If from shunt excitation mode, grid side control device can not adjust voltage, and the power supply of DC bus is still provided by the single-phase rectification bridge in cabinet.
Step 2, operator could send excitation instruction to rotor-side control device after step 2 performs, and the rotating speed of rotor-side control device meeting automatic monitoring unit, only have and just automatic excitation can build pressure (acquiescence excitation rotating speed is 80% synchronous speed) when generating unit speed exceedes synchronous speed 70%.The function of rotor-side control device follows the tracks of rotor speed to make the output voltage frequency of rotor-side frequency converter be the difference of synchronizing frequency and rotating speed, thus realize asynchronous generating.Now grid side and rotor-side control to actually constitute an ac-dc-ac frequency converter.If from shunt excitation mode, in 3 ~ 5 seconds that just build pressure, DC bus power is still provided by single-phase rectification bridge, after set end voltage reaches rated value, DC bus-bar voltage can be adjusted to set point by grid side control device automatically, makes single-phase rectification bridge not reoffer power.Rotor-side controller can monitoring motor rotating speed always, once rotating speed is lower than the i.e. automatic field suppressing of synchronous war speed 70%.
Step 3, operator can set about generator to be incorporated to infinitely great electrical network after Generator end builds pressure, and this device does not provide grid-connected switching mechanism, only has and network interface.Synchronizing frequency can be remained on by infinitely great electrical network in grid-connected rear machine end frequency, now change rotor excited voltage frequency and can change motor speed.And if motor speed is higher than synchronizing frequency, then the power flow direction of ac-dc-ac inverter system will be from rotor to electrical network, then contrary lower than synchronizing frequency, thus realize doubly-fed generation.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (1)
1. the control method of a double-fed fan excitation control device, it is characterized in that, adopt and control with lower device: specifically comprise: wind characteristic analogue means, the ac excitation generating device be connected with wind characteristic analogue means respectively and DSP control device, described DSP control device is also connected with an excitation potential device, and described excitation potential device is connected with described ac excitation generating device by an excitation change over switch; The ac excited generator that described ac excitation generating device is comprised a separate excitation DC generator and is connected with described wind characteristic analogue means by separate excitation DC generator; The grid side dsp controller that described DSP control device is comprised a rotor-side dsp controller and is connected with ac excited generator with above-mentioned separate excitation DC generator by described rotor-side dsp controller simultaneously; The excitation transformer that described excitation potential device is comprised a flat ripple reactance and is connected with above-mentioned grid side dsp controller by flat ripple reactance; This kind of double-fed fan excitation control device also comprises the grid-connected switch that a main transformer and one end are connected with above-mentioned ac excited generator by main transformer, and the described grid-connected switch other end is connected with electrical network; Above-mentioned excitation change over switch is connected to above-mentioned ac excited generator, excitation transformer and civil power;
The control method of this double-fed fan excitation control device comprises the following steps:
Step 1, in inactive state, the power supply of DC bus is provided by single-phase rectification bridge, operator sends grid side start-up command, if separate excitation mode, DC bus-bar voltage can be adjusted to set point by grid side dsp controller automatically, and what grid side dsp controller and rotor-side dsp controller adopted is sinusoidal pulse width modulation; If from shunt excitation mode, grid side dsp controller can not adjust voltage, and the power supply of DC bus is still provided by the single-phase rectification bridge in cabinet;
Step 2, operator could send excitation instruction to rotor-side dsp controller after step 1 performs, and the rotating speed of rotor-side dsp controller meeting automatic monitoring unit, only have and just automatic excitation can build pressure when generating unit speed exceedes synchronous speed 70%; If from shunt excitation mode, in 3 ~ 5 seconds that just build pressure, DC bus power is still provided by single-phase rectification bridge, after set end voltage reaches rated value, DC bus-bar voltage can be adjusted to set point by grid side dsp controller automatically, makes single-phase rectification bridge not reoffer power; Rotor-side dsp controller can monitor generating unit speed always, once rotating speed is lower than synchronous speed 70% i.e. automatic field suppressing;
Step 3, operator can set about generator to be connected to the grid after Generator end builds pressure, and this double-fed fan excitation control device does not provide grid-connected switching mechanism, only has and network interface; Synchronizing frequency can be remained on by infinitely great electrical network in grid-connected rear machine end frequency, now change rotor excited voltage frequency and can change generating unit speed; And if generating unit speed is higher than synchronizing frequency, then the power flow direction of ac-dc-ac inverter system will be from rotor to electrical network, then contrary lower than synchronizing frequency, thus realize doubly-fed generation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210365686.5A CN102843085B (en) | 2012-09-27 | 2012-09-27 | Double-feed fan excitation control device and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210365686.5A CN102843085B (en) | 2012-09-27 | 2012-09-27 | Double-feed fan excitation control device and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102843085A CN102843085A (en) | 2012-12-26 |
| CN102843085B true CN102843085B (en) | 2015-05-13 |
Family
ID=47370198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210365686.5A Active CN102843085B (en) | 2012-09-27 | 2012-09-27 | Double-feed fan excitation control device and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102843085B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490600B (en) * | 2016-02-04 | 2018-02-13 | 华自科技股份有限公司 | Generator excited system and its Parameters design and system |
| FR3062252B1 (en) * | 2017-01-20 | 2019-11-22 | Valeo Equipements Electriques Moteur | TENSILE ROTATING ELECTRIC MACHINE FOR A MOTOR VEHICLE WITH FLOW SWITCHING |
| CN112910342A (en) * | 2020-12-27 | 2021-06-04 | 深圳南山热电股份有限公司 | Excitation mode of gas turbine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064714A (en) * | 2010-12-02 | 2011-05-18 | 永济新时速电机电器有限责任公司 | Doubly-fed wind power frequency converter |
| CN202282758U (en) * | 2011-09-30 | 2012-06-20 | 武汉华大电力自动技术有限责任公司 | Excitation control device for doubly-fed fan |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7015595B2 (en) * | 2002-02-11 | 2006-03-21 | Vestas Wind Systems A/S | Variable speed wind turbine having a passive grid side rectifier with scalar power control and dependent pitch control |
-
2012
- 2012-09-27 CN CN201210365686.5A patent/CN102843085B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064714A (en) * | 2010-12-02 | 2011-05-18 | 永济新时速电机电器有限责任公司 | Doubly-fed wind power frequency converter |
| CN202282758U (en) * | 2011-09-30 | 2012-06-20 | 武汉华大电力自动技术有限责任公司 | Excitation control device for doubly-fed fan |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102843085A (en) | 2012-12-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105305478B (en) | A kind of pair of power grid is friendly and extends flexible grid-connected power generation system | |
| CN102332727B (en) | Method for outputting active power by using smoothing permanent-magnet direct-driving wind power generating system of direct-current-side flywheel energy storage unit | |
| CN101860043B (en) | Low voltage traversing control device and method for serial connection wind power generator set | |
| CN102916446B (en) | Electric control system of asynchronous wind generating set | |
| CN102738829B (en) | Topological structure of variable frequency control wind power generation system | |
| CN102386633A (en) | Megawatt direct-drive alternating current-direct current-alternating current wind power generating system with squirrel-cage asynchronous generator | |
| CN108631355A (en) | Converter, electric control system and wind farm power transmission system | |
| CN107240930A (en) | One kind is based on double-fed type wind generator system | |
| CN109873446A (en) | A kind of distributed photovoltaic power generation system control strategy based on improvement virtual synchronous generator | |
| CN202455089U (en) | Megawatt-grade direct-driven type mouse cage asynchronous generator AC-DC-AC wind power generation system | |
| CN201805236U (en) | Series type LVRT (low voltage ride through) control device of wind generating set | |
| CN101394093B (en) | Incorporating network and method for wind electricity generator group | |
| CN102843085B (en) | Double-feed fan excitation control device and control method thereof | |
| CN202737481U (en) | Topological structure of frequency-conversion-control wind power generation system | |
| CN102097826B (en) | Doubly salient electromagnetic wind power generation system structure and control method | |
| CN204721000U (en) | A kind of friendly and expand grid-connected power generation system flexibly to electrical network | |
| Ahmed et al. | Study of characteristics of wind turbine PMSG with reduced switches count converters | |
| Kumar Bisoyi et al. | A review of the state of the art of generators and power electronics converter topologies for wind energy conversion system | |
| CN102386631A (en) | Low-wind-speed-occasion multiple low-capacity unit convergence power generating system and method | |
| CN103441528A (en) | Converter topological structure for doubly-fed wind generating set | |
| Yu et al. | Fault ride-through of fractional frequency offshore wind power system based on modular multilevel matrix converter | |
| CN202282758U (en) | Excitation control device for doubly-fed fan | |
| CN103986346A (en) | Wind power generation system based on full wave chop-control rectifying circuits | |
| CN204361682U (en) | The full direct current energy collecting system of a kind of wind energy turbine set | |
| CN204089213U (en) | Wide speed range directly-driving wind power generation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |