CN104601064B - A kind of electricity generation system intelligent control method of high reliability - Google Patents
A kind of electricity generation system intelligent control method of high reliability Download PDFInfo
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- CN104601064B CN104601064B CN201410826115.6A CN201410826115A CN104601064B CN 104601064 B CN104601064 B CN 104601064B CN 201410826115 A CN201410826115 A CN 201410826115A CN 104601064 B CN104601064 B CN 104601064B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004804 winding Methods 0.000 claims abstract description 20
- 230000033228 biological regulation Effects 0.000 claims abstract description 15
- 230000006641 stabilisation Effects 0.000 claims abstract description 4
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- 230000004888 barrier function Effects 0.000 claims 1
- 238000010248 power generation Methods 0.000 abstract description 10
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- 238000005516 engineering process Methods 0.000 description 4
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/006—Means for protecting the generator by using control
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/14—Estimation or adaptation of machine parameters, e.g. flux, current or voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a kind of electricity generation system intelligent control method of high reliability, the intelligent control method employs the stable regulation that voltage regulator to carry out generator voltage, so as to ensure the voltage stabilization sent；Employ predictive controller to replace traditional electric current PI controllers in electric current regulation, solve the hysteresis characteristic of conventional current PI controllers, improve the bandwidth and dynamic property of electricity generation system；Finally employ the control method of SVM combination four-arm converters to improve the reliability of system, enable electricity generation system to remain to stablize normal power generation under the open circuit of the phase winding of generator one or a phase winding short circuit fault condition.The present invention has the features such as stable quick dynamic response capability, voltage-regulation, reliability height, intellectuality, it is adaptable to the generating occasion higher to dynamic property and reliability requirement.
Description
Technical field
The present invention relates to the field of electrical power generators control technology, more particularly, to a kind of electricity generation system intelligence of high reliability
Can control method.
Background technology
With Power Electronic Technique, Electric Drive technology it is growing, electrical power generators system has been obtained extensively
Application, such as wind-power electricity generation, water generating.But in recent years, with new energy and science and technology continue to develop, many generating fields
Close to proposing higher requirement in the dynamic property and reliability of electrical power generators system.
Generation current machine electricity-generating control method still suffers from some shortcomings or part to be modified：The voltage-regulation in power generation process
Stablize not enough；, there is intrinsic hysteresis characteristic in its electric current PI controller used, thus can influence system dynamic property and
The increase of system bandwidth is limited, response speed is limited；, there is winding when running into generator in the poor reliability of its electricity generation system control
It can not carry out stablizing normal power generation after open circuit or short trouble, have a strong impact on the power generation performance of generator.
The content of the invention
The purpose of the present invention is to overcome drawbacks described above present in prior art there is provided a kind of electricity generation system of high reliability
Intelligent control method, can stably carry out voltage-regulation in power generation process, while it is fine to have electricity generation system
Ground dynamic property, reduces lagging influence, and electricity generation system can be made to have higher reliability, and winding occur even in generator breaks
Remain to stablize normal power generation under road or short circuit fault condition, so as to be allowed to suitable for higher to dynamic property and reliability requirement
Generating occasion.
To achieve these goals, the invention provides a kind of electricity generation system intelligent control method of high reliability, the party
Method comprises the following steps：
(1) starting prime mover drives generator operation to enter generating state, and the three of generator are gathered by Hall sensor
Phase current ia、ib、ic, then it is converted by Clark and Park converts the actual current for obtaining generator under d-q coordinate systems
Value id、iq；
(2) the position signalling θ of generator is gathered by position detector, uses, leads to for Park conversion and Park inverse transformations
DC voltage U on overvoltage detector collection four-arm converter enddc；
(3) by given voltage Udc *With the virtual voltage U of feedbackdcFeeding voltage regulator is handled, and obtains that electricity can be made
Press the given electric current i of stability contortingq *；
(4) by given d-q shaft currents iq *And id *Predictive controller is sent into, while the d-q axles of last time output is electric
Press Ud *(k-1)、Uq *And the last electric current i fed back (k-1)dAnd i (k-1)q(k-1) predictive controller is together sent into,
The d-q shaft voltages U predictedd *And U (k)q *(k), its prediction expression is：
Ud *(k)=A1id(k-1)+A2id *(k)+A3iq(k-1)+A4Ud *(k-1)
Uq *(k)=B1iq(k-1)+B2iq *(k)+B3id(k-1)+B4Uq *(k-1)
Wherein, k is k-th of controlling cycle, and k-1 represents -1 cycle of kth, i.e., upper a cycle, Ud *And U (k)q *(k) divide
The d-q shaft voltages for k-th of the controlling cycle that Wei do not predict, id *And i (k)q *(k) it is respectively to be given in k-th of controlling cycle
D-q shaft currents, A1、A2、A3、A4For Ud *(k) regulation parameter, B1、B2、B3、B4For Uq *(k) regulation parameter, according to generator
Itself different characteristic is determined；
(5) by the obtained d-q shaft voltages U predictedd *And U (k)q *(k) static two-phase, is obtained after Park inverse transformations
The generator voltage u given under orthogonal coordinate systemα *、uβ *, when the system is normal, pass through Realization of pulse width modulation based on voltage space vector (SVM)
Obtain the pulse-width signal S that the power tube of tri- bridge arms of a, b, c is opened, turned offa、Sb、Sc, then by driving four bridge legs inverse
Tri- bridge arms of a, b, c become in device make it export corresponding three-phase current ia、ib、icTo control generator to follow Setting signal steady
Determine normal power generation；
(6) when phase winding open circuit or a phase winding short trouble occurs in system, for example a phase windings occur breaking or short
After the failure of road, at this moment a bridge arms broken down will be replaced with the four bridge legs n being connected with generator three-phase windings central point,
A bridge arms are cut away, the given generator voltage of adjustment is the u under failureα *、uβ *, while by failure phase a voltage vector by
Four bridge legs n is replaced, i.e., obtaining the power tube under open circuit or short trouble state by Realization of pulse width modulation based on voltage space vector (SVM) opens
Logical, shut-off pulse-width signal Sn、Sb、Sc, then by driving tri- bridge arms of n, b, c in four-leg inverter to make its defeated
Go out corresponding three-phase current in、ib、icTo control generator to follow Setting signal pressure regulation to generate electricity, generator is set to be remained under failure
Stably and normally generate electricity.
Compared with prior art, main advantage of the invention is：
The invention provides a kind of electricity generation system intelligent control method of high reliability, the intelligent control method employs electricity
Pressure adjuster to carry out generator the stable regulation of voltage, so as to ensure the voltage stabilization sent；Used in electric current regulation
Predictive controller replaces traditional electric current PI controllers, solves the hysteresis characteristic of conventional current PI controllers, improves
The bandwidth and dynamic property of system；The control method of SVM combination four-arm converters is finally employed to improve the reliable of system
Property, enable the system to remain to stablize normal power generation under the open circuit of the phase winding of generator one or a phase winding short circuit fault condition.This hair
It is bright that there is the features such as stable quick dynamic response capability, voltage-regulation, reliability height, intellectuality, it is adaptable to dynamic property
And the higher generating occasion of reliability requirement.
Brief description of the drawings
Fig. 1 is control principle block diagram of the invention.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing, so as to those skilled in the art more
Understand the present invention well.
As shown in figure 1, being a kind of specific implementation of the electricity generation system intelligent control method of high reliability of the present invention
Mode, its specific implementation step is：
(1) starting prime mover drives generator operation to enter generating state, and the three of generator are gathered by Hall sensor
Phase current ia、ib、ic, then it is converted by Clark and Park converts the actual current for obtaining generator under d-q coordinate systems
Value id、iq；
(2) the position signalling θ of generator is gathered by position detector, uses, leads to for Park conversion and Park inverse transformations
DC voltage U on overvoltage detector collection four-arm converter enddc；
(3) by given voltage Udc *With the virtual voltage U of feedbackdcFeeding voltage regulator is handled, and obtains that electricity can be made
Press the given electric current i of stability contortingq *；
(4) by given d-q shaft currents iq *And id *Predictive controller is sent into, while the d-q axles of last time output is electric
Press Ud *(k-1)、Uq *And the last electric current i fed back (k-1)dAnd i (k-1)q(k-1) predictive controller is together sent into,
The d-q shaft voltages U predictedd *And U (k)q *(k), its prediction expression is：
Ud *(k)=A1id(k-1)+A2id *(k)+A3iq(k-1)+A4Ud *(k-1)
Uq *(k)=B1iq(k-1)+B2iq *(k)+B3id(k-1)+B4Uq *(k-1)
Wherein, k is k-th of controlling cycle, and k-1 represents -1 cycle of kth, i.e., upper a cycle, Ud *And U (k)q *(k) divide
The d-q shaft voltages for k-th of the controlling cycle that Wei do not predict, id *And i (k)q *(k) it is respectively to be given in k-th of controlling cycle
D-q shaft currents, A1、A2、A3、A4For Ud *(k) regulation parameter, B1、B2、B3、B4For Uq *(k) regulation parameter, according to generator
Itself different characteristic is determined；
(5) by the obtained d-q shaft voltages U predictedd *And U (k)q *(k) static two-phase, is obtained after Park inverse transformations
The generator voltage u given under orthogonal coordinate systemα *、uβ *, when the system is normal, pass through Realization of pulse width modulation based on voltage space vector (SVM)
Obtain the pulse-width signal S that the power tube of tri- bridge arms of a, b, c is opened, turned offa、Sb、Sc, then by driving four bridge legs inverse
Tri- bridge arms of a, b, c become in device make it export corresponding three-phase current ia、ib、icTo control generator to follow Setting signal steady
Determine normal power generation；
(6) when phase winding open circuit or a phase winding short trouble occurs in system, for example a phase windings occur breaking or short
After the failure of road, at this moment a bridge arms broken down will be replaced with the four bridge legs n being connected with generator three-phase windings central point,
A bridge arms are cut away, the given generator voltage of adjustment is the u under failureα *、uβ *, while by failure phase a voltage vector by
Four bridge legs n is replaced, i.e., obtaining the power tube under open circuit or short trouble state by Realization of pulse width modulation based on voltage space vector (SVM) opens
Logical, shut-off pulse-width signal Sn、Sb、Sc, then by driving tri- bridge arms of n, b, c in four-leg inverter to make its defeated
Go out corresponding three-phase current in、ib、icTo control generator to follow Setting signal pressure regulation to generate electricity, generator is set to be remained under failure
Stably and normally generate electricity.
The intelligent control method employs voltage regulator and to carry out generator the stable regulation of voltage, so as to ensure hair
The voltage stabilization gone out；Employ predictive controller to replace traditional electric current PI controllers in electric current regulation, solve tradition
The hysteresis characteristic of electric current PI controllers, improves the bandwidth and dynamic property of system；Finally employ the conversion of SVM combinations four bridge legs
The control method of device improves the reliability of system, enables the system in the open circuit of the phase winding of generator one or a phase winding short trouble
In the case of remain to stablize normal power generation.The present invention has stable quick dynamic response capability, voltage-regulation, reliability height, intelligence
The features such as changing, it is adaptable to the generating occasion higher to dynamic property and reliability requirement.
The technological thought of embodiment of above only to illustrate the invention, it is impossible to which protection scope of the present invention is limited with this, it is all
It is any change done on the basis of technical scheme according to technological thought proposed by the present invention, each falls within present invention protection model
Within enclosing.
Claims (1)
1. the electricity generation system intelligent control method of a kind of high reliability, it is characterised in that comprise the following steps：
(1) starting prime mover drives generator operation to enter generating state, and the three-phase electricity of generator is gathered by Hall sensor
Flow ia、ib、ic, then it is converted by Clark and Park converts the actual current value i for obtaining generator under d-q coordinate systemsd、
iq；
(2) the position signalling θ of generator is gathered by position detector, is used for Park conversion and Park inverse transformations, passes through electricity
Press the DC voltage U on detector collection four-arm converter enddc；
(3) by given voltage Udc *With the virtual voltage U of feedbackdcFeeding voltage regulator is handled, and obtains voltage being made steady
Surely the given electric current i controlledq *；
(4) by given d-q shaft currents iq *And id *Predictive controller is sent into, while the d-q shaft voltages U that the last time is exportedd *
(k-1)、Uq *And the last electric current i fed back (k-1)dAnd i (k-1)q(k-1) predictive controller is together sent into, is obtained
The d-q shaft voltages U predictedd *And U (k)q *(k), its prediction expression is：
Ud *(k)=A1id(k-1)+A2id *(k)+A3iq(k-1)+A4Ud *(k-1)
Uq *(k)=B1iq(k-1)+B2iq *(k)+B3id(k-1)+B4Uq *(k-1)
Wherein, k is k-th of controlling cycle, and k-1 represents -1 cycle of kth, i.e., upper a cycle, Ud *And U (k)q *(k) it is respectively
The d-q shaft voltages of k-th of the controlling cycle predicted, id *And i (k)q *(k) it is respectively d-q given in k-th of controlling cycle
Shaft current, A1、A2、A3、A4For Ud *(k) regulation parameter, B1、B2、B3、B4For Uq *(k) regulation parameter, according to generator itself
Different characteristics is determined；
(5) by the obtained d-q shaft voltages U predictedd *And U (k)q *(k) the orthogonal seat of static two-phase, is obtained after Park inverse transformations
The lower given generator voltage u of mark systemα *、uβ *, when the system is normal, by Realization of pulse width modulation based on voltage space vector (SVM) obtain a,
The pulse-width signal S that the power tube of tri- bridge arms of b, c is opened, turned offa、Sb、Sc, then by driving in four-leg inverter
Tri- bridge arms of a, b, c it is exported corresponding three-phase current ia、ib、icIt is normal to control generator to follow Setting signal to stablize
Generate electricity；
(6) when system one phase winding of appearance open circuit or a phase winding short trouble, there is open circuit or short circuit event in such as a phase windings
After barrier, at this moment, instead of a bridge arms broken down, it will be cut off with the four bridge legs n being connected with generator three-phase windings central point
Fall a bridge arms, the given generator voltage of adjustment is the u under failureα *、uβ *, while by failure phase a voltage vector by the 4th bridge
Arm n is replaced, i.e., the power tube obtained by Realization of pulse width modulation based on voltage space vector (SVM) under open circuit or short trouble state is opened, closed
Disconnected pulse-width signal Sn、Sb、Sc, then by driving tri- bridge arms of n, b, c in four-leg inverter to make its output corresponding
Three-phase current in、ib、icTo control generator to follow Setting signal pressure regulation to generate electricity, generator is set to remain to stabilization under failure just
Often generate electricity.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904520A (en) * | 2012-10-09 | 2013-01-30 | 华东建筑设计研究院有限公司 | Current predictive control method of permanent magnet synchronous motor |
| CN103199790A (en) * | 2013-05-03 | 2013-07-10 | 哈尔滨理工大学 | Control system and control method for three-phase four-bridge-arm permanent magnet synchronous motor |
| CN104184355A (en) * | 2014-08-06 | 2014-12-03 | 南京信息工程大学 | Double-closed-loop control apparatus and control method of three-phase PWM voltage type inverter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3974373B2 (en) * | 2001-10-25 | 2007-09-12 | 株式会社日立製作所 | Wind power generator and wind power generation method |
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- 2014-12-25 CN CN201410826115.6A patent/CN104601064B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904520A (en) * | 2012-10-09 | 2013-01-30 | 华东建筑设计研究院有限公司 | Current predictive control method of permanent magnet synchronous motor |
| CN103199790A (en) * | 2013-05-03 | 2013-07-10 | 哈尔滨理工大学 | Control system and control method for three-phase four-bridge-arm permanent magnet synchronous motor |
| CN104184355A (en) * | 2014-08-06 | 2014-12-03 | 南京信息工程大学 | Double-closed-loop control apparatus and control method of three-phase PWM voltage type inverter |
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Inventor after: Li Jie Inventor after: Jiang Xuefeng Inventor after: Jiang Heping Inventor after: Jiang Shunkai Inventor before: Li Jie Inventor before: Jiang Heping Inventor before: Jiang Shunkai |
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Effective date of registration: 20170927 Address after: 402368 Chongqing Dazu District Dragon Dragon Town Road No. 178 Building 1 1-4 Tang Patentee after: Chongqing top technology Co., Ltd. Address before: 400055 Banan District, Chongqing flower Bay No. 5, attached No. 7 Patentee before: Jiang Heping |
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Effective date of registration: 20191021 Address after: Room 0507, Sichuan entrepreneurship and innovation building, headquarters economic Park, Yangtze River Delta, No. 16, Xianlin East Road, Baohua Town, Jurong City, Zhenjiang City, Jiangsu Province Patentee after: Jiangsu hangxunfei Information Technology Co., Ltd. Address before: 402368 1-4, 178 Longtang Avenue, Longshui Town, Dazu District, Chongqing Patentee before: Chongqing Fengchuang Technology Co., Ltd. |
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