CN108322113A - A kind of switched reluctance motor system method for controlling power balance - Google Patents
A kind of switched reluctance motor system method for controlling power balance Download PDFInfo
- Publication number
- CN108322113A CN108322113A CN201810125709.2A CN201810125709A CN108322113A CN 108322113 A CN108322113 A CN 108322113A CN 201810125709 A CN201810125709 A CN 201810125709A CN 108322113 A CN108322113 A CN 108322113A
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- power
- switched reluctance
- rotating speed
- reluctance motor
- moment
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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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/66—Regulating electric power
- G05F1/67—Regulating electric power to the maximum power available from a generator, e.g. from solar cell
-
- 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
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/15—Special adaptation of control arrangements for generators for wind-driven turbines
Abstract
The present invention relates to a kind of switched reluctance motor system method for controlling power balance, include the following steps：Detect motor speed size, when rotating speed is less than load, switched reluctance motor system carries out maximum power tracing, and computing system Maximum Power Output, if the maximum power of system output still cannot meet the power needed for load, then energy storage device maintains the stabilization and system power balance of DC bus-bar voltage to load transmission power；When rotating speed is more than loading, switched reluctance motor system carries out maximum power tracing, if when the maximum power of output is more than loading required power, and not having energy storage device or energy storage to expire in system, then carries out busbar voltage closed loop.The present invention, which is in busbar voltage in safe range, can fast implement maximal wind-energy capture, improve the stability of system under rotation speed change, ability also with self adjustment busbar voltage simultaneously, ensure that the stabilization of system power balance and busbar voltage, has good engineering application value.
Description
Technical field
The present invention relates to switched reluctance machines fields, and in particular to a kind of switched reluctance motor system power-balance controlling party
Method.
Background technology
Switched reluctance machines have simple in structure, control flexibly, manufacturing cost is low and the characteristics such as fault freedom is good at
Work(is applied to many occasions especially bad environments occasion.Currently, being most to the main direction of studying of switched reluctance motor system
High-power Tracing Control and efficiency-optimization control, specifically disclose following methods：1, by constant-impedance circuit in parallel in power inverter
Both ends keep maximum power tracing control simpler；2, the magnetic linkage and torque data obtained using finite element method is established
Switched reluctance machines model, the maximum power corresponding to given rotating speed calculate optimal turn-on angle and shutdown angle to realize
Efficiency maximizes；3, a kind of power disturbance tracing of variable step is proposed, it is not necessary to install rotation-speed measuring device additional, it also need not be right in advance
Mechanical characteristic measures, and realizes the decoupling control of switched reluctance machines and wind energy conversion system, and devises 10kW systems and answer
For actual field.4, it uses FUZZY ALGORITHMS FOR CONTROL and efficiently reduces the pulsation of switched reluctance machines output voltage, and use
Variable Step Algorithm has carried out maximal power tracing control, accelerates maximum power point search process.But it is undisclosed to switching magnetic
The power-balance control of resistance electric system is studied.
Invention content
The purpose of the present invention is to provide a kind of switched reluctance motor system method for controlling power balance, at busbar voltage
Maximum power tracing control is carried out in safe range, realizes that electric energy efficiently utilizes；It is carried out when busbar voltage is detached from safe range
Busbar voltage closed-loop control rationally controls electrical power, maintains power-balance, ensures the stabilization of busbar voltage.
To achieve the above object, present invention employs following technical schemes：
A kind of switched reluctance motor system method for controlling power balance, includes the following steps：
Motor speed size is detected, when rotating speed is less than load, switched reluctance motor system carries out maximum power tracing, and
Computing system Maximum Power Output, if the maximum power of system output still cannot meet the power needed for load, energy storage
Device maintains the stabilization and system power balance of DC bus-bar voltage to load transmission power；
When rotating speed is more than load, switched reluctance motor system carries out maximum power tracing, if the maximum power of output is big
When loading required power, and there is no energy storage device or energy storage to expire in system, then busbar voltage closed loop is carried out, keeps busbar electric
Pressure is within safe range.
Further, described when rotating speed is more than load, switched reluctance motor system carries out maximum power tracing, if output
Maximum power be more than the power needed for load, and when there is no energy storage device or energy storage to expire in system, then carry out busbar voltage
Closed loop is that output current phase copped wave limit value is realized after PI controllers by motor speed given voltage and actual speed difference.
Further, the calculating motor speed given voltage value, specifically includes following steps：
Rotating speed disturbance quantity is calculated according to the size of former and later two moment output powers and judges perturbation direction, if output power
Increase, then apply equidirectional rotating speed disturbance quantity, if output power reduces, applies the rotating speed disturbance quantity of negative direction；Upper one
It is superimposed rotating speed disturbance quantity on the basis of moment real electrical machinery rotating speed, exports this moment rotary speed setting value.
Further, the rotating speed disturbance quantity, is calculated using following formula：
Wherein, Δ ω (t+1) indicates the rotating speed disturbance quantity at t+1 moment；λ indicates that rotating speed disturbs coefficient of discharge；When P (t) indicates t
The electrical power at quarter；P (t-1) is the electrical power at t-1 moment；ω (t) indicates the actual speed of t moment；When ω (t-1) indicates t-1
The actual speed at quarter.
Further, the rotary speed setting value, is calculated using following formula：
Wherein, ω (t+1)aimIndicate the rotary speed setting value at t+1 moment；ω (t) indicates the actual speed of t moment；Δω(t
+ 1) the rotating speed disturbance quantity at t+1 moment is indicated；Δ P indicates the difference of former and later two moment electrical power of system.
Further, it is to use the same PI controllers that control system, which carries out speed closed loop and voltage close loop, according to direct current
Bus voltage value selection percentage and integral parameter avoid system big ups and downs during controlling tactic switch.
As shown from the above technical solution, switched reluctance motor system method for controlling power balance of the present invention, will most
High-power Tracing Control combines with voltage close loop control, and realizes two kinds of control modes according to the size of DC bus-bar voltage
Seamless switching.When busbar voltage Us is less than threshold voltage U1, switched reluctance motor system carries out maximum power tracing control, turns
Fast closed loop adjusts phase current copped wave limit value, and output power is made quickly to increase；When busbar voltage Us is more than threshold voltage U2, switch
Reluctance motor system carries out busbar voltage closed-loop control, and the output power of system is limited by adjusting phase current copped wave limit value,
DC bus-bar voltage is set to be in safe range；When busbar voltage Us is between U1 and U2, the phase electricity of control system output
Stream copped wave limit value remains unchanged.Maximal wind-energy capture can be fast implemented by being in safe range in busbar voltage by this method,
The stability of system under rotation speed change, while the ability also with self adjustment busbar voltage are improved, ensure that system power
The stabilization of balance and busbar voltage has good engineering application value.
Description of the drawings
Fig. 1 is switched reluctance motor system；
Fig. 2 is maximum power tracing control structure block diagram；
Fig. 3 is busbar voltage closed loop controlling structure block diagram；
Fig. 4 is switched reluctance motor system power-balance control structure block diagram.
Specific implementation mode
The present invention will be further described below in conjunction with the accompanying drawings：
As shown in Figure 1, the switched reluctance motor system of the present embodiment is mainly by wind energy conversion system, the switch magnetic of 12/8 structure of three-phase
Hinder motor, the power inverter of asymmetrical half-bridge structure and four part of control system composition.Switched reluctance machines are as electromechanical
The core component of energy conversion, relies on power inverter that the mechanical energy of input is converted into electric energy and is exported.Control system is whole
The maincenter part of a system, it integrates feedback signals and the externally input orders such as rotor-position, voltage and current, then divides
Analysis handles and sends out the control signal of power inverter main switching device, realizes the timesharing excitation and transducing of system.
As shown in Fig. 2, control used by a kind of switched reluctance motor system method for controlling power balance of the present embodiment
System, including power calculator, maximum power tracing module MPPT, rotating speed calculator, hystersis controller, Angle-domain imaging
Device, power inverter and position sensor, the output end of the power inverter and the control terminal and power calculator of motor SRG
Input terminal connection, the output end of the input terminal of power inverter and hystersis controller connects, the input terminal of hystersis controller with
The output end of Angle-domain imaging device and PI controllers connects, output end and the maximum power tracing module MPPT of power calculator
Input terminal connection, the output end of rotating speed calculator connect with the input terminal of maximum power tracing module MPPT, and angle position is controlled
The input terminal of device processed is connect with position sensor and rotating speed calculator, the position sensor mounted on motor SRG it is coaxial on.
This method specifically includes following steps：Motor speed size is detected, when rotating speed is less than load, switched reluctance machines
System carries out maximum power tracing, and computing system Maximum Power Output, if the maximum power of system output still cannot meet
When loading required power, then energy storage device maintains the stabilization of DC bus-bar voltage and system power flat to load transmission power
Weighing apparatus；When rotating speed is more than load, switched reluctance motor system carries out maximum power tracing, if the maximum power of output is more than load
Required power, and when there is no energy storage device or energy storage to expire in system, then busbar voltage closed loop is carried out, busbar voltage is made to be in
Within safe range.
Control system samples busbar voltage Us, bus current idcWith phase current iabcIf busbar voltage UsLess than threshold voltage
U1, then system progress maximum power tracing control, control structure block diagram are as shown in Figure 2.Maximum power tracing module is according to public affairs
Formula (1) calculates t moment system electrical power P (t), and compared with t-1 system electrical powers P (t-1), provides the disturbance of t+1 rotating speeds
Δ ω (t+1) and perturbation direction are measured, is calculated according to formula (2), rotating speed disturbance quantity is then superimposed on the basis of actual speed
Obtain the rotary speed setting value ω (t+1) at t+1 momentaim.The difference of rotary speed setting value and actual speed exports after PI controllers
Phase current copped wave limit value i*.Phase current iabcWith phase current copped wave limit value i*It compares and generates Hysteresis control signal.Hysteresis control is believed
It number opening and turning off with angle position signal phase and rear control power inverter main switching device, finally making switched reluctance machines
System is stable, accurately and rapidly exports maximum power under this wind speed.
P (t)=Udc×Idc (1)
In formula (1), UdcIndicate DC bus-bar voltage, IdcIndicate DC bus current.
In formula (2), ω (t+1)aimIndicate the rotary speed setting value at t+1 moment；ω (t) indicates the actual speed of t moment；Δ
ω (t+1) indicates the rotating speed disturbance quantity at t+1 moment；Δ P indicates the difference of former and later two moment electrical power；λ is rotating speed disturbance quantity
Coefficient；P (t) indicates the electrical power of t moment；P (t-1) indicates the electrical power at t-1 moment；ω (t) indicates that the reality of t moment turns
Speed；ω (t-1) indicates the actual speed at t-1 moment.
As busbar voltage UsMore than threshold voltage U2, then system progress busbar voltage closed-loop control, control system figure is as schemed
Shown in 3.Busbar voltage gives U* dcWith virtual voltage UdcDifference after PI is controlled output current phase copped wave limit value i*.Mutually electricity
Flow iabcWith phase current copped wave limit value i*It compares and generates Hysteresis control signal.Hysteresis control signal and Angle-domain imaging signal
Opening and turning off for power inverter main switching device mutually is controlled with rear, to maintain system power to balance, ensures busbar voltage
Stabilization.
Switched reluctance motor system method for controlling power balance controls maximum power tracing and busbar voltage closed-loop control
Organically combine, and realizes the seamless switching of both control modes according to busbar voltage, control structure block diagram such as Fig. 4
It is shown.The method for controlling power balance can both make system output maximum power, realize the efficient utilization of wind energy, ensure that simultaneously
System power balances and the stabilization of busbar voltage.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
It encloses and is defined, under the premise of not departing from design spirit of the present invention, technical side of the those of ordinary skill in the art to the present invention
The various modifications and improvement that case is made should all be fallen into the protection domain of claims of the present invention determination.
Claims (6)
1. a kind of switched reluctance motor system method for controlling power balance, which is characterized in that include the following steps：
Motor speed size is detected, when rotating speed is less than load, switched reluctance motor system carries out maximum power tracing, and calculates
System output maximum power, if the maximum power of system output still cannot meet the power needed for load, energy storage device
To load transmission power, the stabilization and system power balance of DC bus-bar voltage are maintained；
When rotating speed is more than load, switched reluctance motor system carries out maximum power tracing, if the maximum power of output is more than negative
When carrying required power, and there is no energy storage device or energy storage to expire in system, then busbar voltage closed loop is carried out, is made at busbar voltage
Within safe range.
2. switched reluctance motor system method for controlling power balance according to claim 1, it is characterised in that：It is described to turn
When speed is more than load, switched reluctance motor system carries out maximum power tracing, if the maximum power of output is more than needed for load
Power, and when there is no energy storage device or energy storage to expire in system, then it is by the given electricity of motor speed to carry out busbar voltage closed loop
Pressure with actual speed difference realize by the output current phase copped wave limit value after PI controllers.
3. switched reluctance motor system method for controlling power balance according to claim 2, it is characterised in that：The calculating
Motor speed given voltage value, specifically includes following steps：
Rotating speed disturbance quantity is calculated according to the size of former and later two moment output powers and judges perturbation direction, if output power increases
Add, then apply equidirectional rotating speed disturbance quantity, if output power reduces, applies the rotating speed disturbance quantity of negative direction；In upper a period of time
Carve real electrical machinery rotating speed on the basis of be superimposed rotating speed disturbance quantity, export this moment rotary speed setting value.
4. switched reluctance motor system method for controlling power balance according to claim 3, it is characterised in that：The rotating speed
Disturbance quantity is calculated using following formula：
Wherein, Δ ω (t+1) indicates the rotating speed disturbance quantity at t+1 moment；λ indicates that rotating speed disturbs coefficient of discharge；P (t) indicates t moment
Electrical power；P (t-1) is the electrical power at t-1 moment；ω (t) indicates the actual speed of t moment；ω (t-1) indicates the t-1 moment
Actual speed.
5. switched reluctance motor system method for controlling power balance according to claim 3, it is characterised in that：The rotating speed
Given value is calculated using following formula：
Wherein, ω (t+1)aimIndicate the rotary speed setting value at t+1 moment；ω (t) indicates the actual speed of t moment；Δω(t+1)
Indicate the rotating speed disturbance quantity at t+1 moment；Δ P indicates the difference of former and later two moment electrical power of system.
6. switched reluctance motor system method for controlling power balance according to claim 3, it is characterised in that：Control system
It is to use the same PI controllers to carry out speed closed loop and voltage close loop, is joined according to d-c bus voltage value selection percentage and integral
Number, avoids system big ups and downs during controlling tactic switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810125709.2A CN108322113B (en) | 2018-02-07 | 2018-02-07 | Power balance control method for switched reluctance motor system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810125709.2A CN108322113B (en) | 2018-02-07 | 2018-02-07 | Power balance control method for switched reluctance motor system |
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| Publication Number | Publication Date |
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| CN108322113A true CN108322113A (en) | 2018-07-24 |
| CN108322113B CN108322113B (en) | 2021-01-29 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110403436A (en) * | 2019-09-03 | 2019-11-05 | 沈阳堆途科技股份有限公司 | A kind of prayer wheel and its control method |
| CN111146767A (en) * | 2019-12-18 | 2020-05-12 | 陈鑫 | Multi-power motor |
| CN111464108A (en) * | 2020-04-24 | 2020-07-28 | 上海电气集团股份有限公司 | Control method and system of hysteresis-adjustable switched reluctance motor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103812114A (en) * | 2014-02-26 | 2014-05-21 | 上海交通大学 | Front feed type voltage series compensation device based on wind electricity |
-
2018
- 2018-02-07 CN CN201810125709.2A patent/CN108322113B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103812114A (en) * | 2014-02-26 | 2014-05-21 | 上海交通大学 | Front feed type voltage series compensation device based on wind electricity |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110403436A (en) * | 2019-09-03 | 2019-11-05 | 沈阳堆途科技股份有限公司 | A kind of prayer wheel and its control method |
| CN111146767A (en) * | 2019-12-18 | 2020-05-12 | 陈鑫 | Multi-power motor |
| CN111464108A (en) * | 2020-04-24 | 2020-07-28 | 上海电气集团股份有限公司 | Control method and system of hysteresis-adjustable switched reluctance motor |
| CN111464108B (en) * | 2020-04-24 | 2023-07-28 | 上海电气集团股份有限公司 | Control method and system for hysteresis-adjustable switch reluctance motor |
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| CN108322113B (en) | 2021-01-29 |
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