CN110912136A - Four-quadrant rectification control method for motor train unit - Google Patents
Four-quadrant rectification control method for motor train unit Download PDFInfo
- Publication number
- CN110912136A CN110912136A CN201911236869.5A CN201911236869A CN110912136A CN 110912136 A CN110912136 A CN 110912136A CN 201911236869 A CN201911236869 A CN 201911236869A CN 110912136 A CN110912136 A CN 110912136A
- Authority
- CN
- China
- Prior art keywords
- voltage
- current
- value
- target reference
- harmonic
- 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.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The invention provides a four-quadrant rectification control method for a motor train unit, which comprises the following steps: comparing the current direct-current voltage value with a given target reference voltage, inputting the difference value of the current direct-current voltage value and the given target reference voltage into a voltage regulator, and multiplying the output of the voltage regulator by the phase angle cosine value of the alternating-current input voltage to obtain a given target reference current; and comparing the given target reference current with the current sampling value, inputting the difference value of the given target reference current and the current sampling value into a current regulator, subtracting the output voltage of the current regulator from the secondary side voltage of the transformer, and summing the obtained voltage with the feedforward harmonic voltage to obtain a PWM (pulse width modulation) command voltage, wherein the harmonic voltage is calculated according to the current sampling value acquired and fed back by the current sensor. The invention can reduce the harmonic content of single-phase four-quadrant rectification current and improve the quality of a power supply at the side of a power grid.
Description
Technical Field
The invention relates to a traction converter of a motor train unit, in particular to a four-quadrant rectification control method of the motor train unit.
Background
With the development of high-speed railways in recent years, the requirement on the power quality of a power grid of a motor train unit is higher and higher, and a four-quadrant rectifier is an important link for connecting the power grid in a traction converter, so that the motor train unit can realize bidirectional flow of energy under the traction and braking working conditions. Therefore, higher requirements are provided for the four-quadrant rectification control technology of the motor train unit, and how to reduce harmonic pollution and influence of rectification equipment on a power grid is urgent.
The control principle of the four-quadrant rectifier is shown in fig. 1, and the main targets of the control are as follows: the voltage udc of the direct current side is ensured to be stabilized within an allowable deviation range; the input current is sinusoidal, the unit power factor operates, and the harmonic pollution to the power grid is reduced.
The four-quadrant rectifier adopts a double closed-loop control method of outer-loop voltage control and inner-loop current control, specifically, as shown in fig. 2, a PI (proportional integral) controller is adopted for the voltage outer loop, and a PR (proportional resonant controller) is adopted for the current control. A proportional-resonant (PR) regulator is used as a controller of a current loop, and is different from a traditional proportional-integral controller, and the PR regulator can realize non-static tracking on the current with fixed frequency at the network side, accelerate the response speed of current (energy) change and improve the dynamic performance of a system.
The transfer function of the PR adjuster is:
but the current loop does not effectively suppress and process harmonic current, and the harmonic content is large.
Disclosure of Invention
According to the technical problem that harmonic pollution and influence of rectifying equipment on a power grid exist, the four-quadrant rectification control method for the motor train unit is provided. The invention mainly detects current harmonic waves, calculates harmonic voltage drop of harmonic current on the filter inductor, and adds the harmonic voltage drop as a feed-forward signal to fundamental wave control quantity to eliminate the harmonic voltage drop on the filter inductor, thereby achieving the purpose of suppressing current harmonic waves.
The technical means adopted by the invention are as follows:
a four-quadrant rectification control method for a motor train unit comprises the following steps:
s1, comparing the current direct current voltage value with a given target reference voltage, inputting the difference value of the current direct current voltage value and the given target reference voltage into a voltage regulator, and multiplying the output of the voltage regulator by the phase angle cosine value of the alternating current input voltage to obtain a given target reference current;
and S2, comparing the given target reference current with the current sampling value, inputting the difference value of the given target reference current and the current sampling value into a current regulator, subtracting the output voltage of the current regulator from the secondary side voltage of the transformer, and summing the obtained voltage with the feedforward harmonic voltage to obtain the PWM command voltage, wherein the harmonic voltage is calculated according to the current sampling value collected and fed back by the current sensor.
Further, the step of obtaining the harmonic voltage includes:
carrying out harmonic extraction on the current sampling value by adopting a fast Fourier transform method;
the harmonic voltage is calculated according to the following formula:
wherein u is the harmonic voltage and L is the inductance value.
Further, the voltage regulator is a proportional-integral controller.
Further, the current regulator is a proportional resonant controller.
Compared with the prior art, the invention has the following advantages:
according to the four-quadrant control scheme of the motor train unit, current harmonic waves are detected, harmonic voltage drop of harmonic current on a filter inductor is calculated, and the harmonic voltage drop is added to fundamental wave control quantity as a feedforward signal to eliminate the harmonic voltage drop on the filter inductor, so that the aim of suppressing the current harmonic waves is fulfilled.
In conclusion, by adding harmonic voltage feedforward on the inductor, the technical scheme of the invention inhibits the harmonic content of the current, reduces the harmonic content, improves the power supply quality of the power grid side, and effectively solves the technical problems of harmonic pollution and influence of the rectification equipment on the power grid.
Based on the reason, the invention can be widely popularized in the field of four-quadrant rectification control.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram illustrating the control principle of a four-quadrant rectifier in the prior art.
Fig. 2 is a prior art four-quadrant rectifier control block diagram.
FIG. 3 is a control block diagram of a four-quadrant rectifier according to the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a four-quadrant rectification control method for a motor train unit, which comprises the following steps:
and S1, comparing the current direct current voltage value with a given target reference voltage, inputting the difference value of the current direct current voltage value and the given target reference voltage into the voltage regulator, and multiplying the output of the voltage regulator by the phase angle cosine value of the alternating current input voltage to obtain a given target reference current. The voltage regulator is a proportional-integral controller.
Specifically, as shown in FIG. 3, U is showndc *The dc voltage that needs to be output for a given target reference voltage, i.e., the four-quadrant rectifier. U shapedcThe current direct current voltage value is obtained by sampling and feeding back a voltage sensor. By pairing Udc *And UdcThe obtained output result is multiplied by the phase angle cosine value of the alternating input voltage to be used as a given target reference current iref。
And S2, comparing the given target reference current with the current sampling value, inputting the difference value of the given target reference current and the current sampling value into the current regulator, subtracting the output voltage of the current regulator from the secondary side voltage of the transformer, and summing the voltage with the feedforward harmonic voltage to obtain the PWM command voltage. Wherein the current regulator is a proportional resonant controller.
In particular by giving a target reference current irefAnd (4) adjusting PR of a comparison result with the current sampling value i, subtracting the output voltage of the current regulator from the secondary side voltage e of the transformer, and summing with the harmonic voltage u of feedforward to obtain the PWM command voltage. The harmonic voltage is calculated according to a current sampling value collected and fed back by a current sensor, and the calculating step comprises the following steps:
a. carrying out harmonic extraction on the current sampling value by adopting a fast Fourier transform method;
b. the harmonic voltage is calculated according to the following formula:
wherein u is the harmonic voltage and L is the inductance value.
The invention can reduce the harmonic content of single-phase four-quadrant rectification current and improve the quality of a power supply at the side of a power grid.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. A four-quadrant rectification control method for a motor train unit is characterized by comprising the following steps:
s1, comparing the current direct current voltage value with a given target reference voltage, inputting the difference value of the current direct current voltage value and the given target reference voltage into a voltage regulator, and multiplying the output of the voltage regulator by the phase angle cosine value of the alternating current input voltage to obtain a given target reference current;
and S2, comparing the given target reference current with the current sampling value, inputting the difference value of the given target reference current and the current sampling value into a current regulator, subtracting the output voltage of the current regulator from the secondary side voltage of the transformer, and summing the obtained voltage with the feedforward harmonic voltage to obtain the PWM command voltage, wherein the harmonic voltage is calculated according to the current sampling value collected and fed back by the current sensor.
2. The motor train unit four-quadrant rectification control method according to claim 1, wherein the step of obtaining the harmonic voltage comprises the following steps of:
carrying out harmonic extraction on the current sampling value by adopting a fast Fourier transform method;
the harmonic voltage is calculated according to the following formula:
wherein u is the harmonic voltage and L is the inductance value.
3. The four-quadrant rectification control method of the motor train unit according to claim 1 or 2, wherein the voltage regulator is a proportional-integral controller.
4. The four-quadrant rectification control method of the motor train unit according to claim 1 or 2, wherein the current regulator is a proportional resonant controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911236869.5A CN110912136A (en) | 2019-12-05 | 2019-12-05 | Four-quadrant rectification control method for motor train unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911236869.5A CN110912136A (en) | 2019-12-05 | 2019-12-05 | Four-quadrant rectification control method for motor train unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110912136A true CN110912136A (en) | 2020-03-24 |
Family
ID=69823348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911236869.5A Pending CN110912136A (en) | 2019-12-05 | 2019-12-05 | Four-quadrant rectification control method for motor train unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110912136A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111697836A (en) * | 2020-05-07 | 2020-09-22 | 南京南瑞继保电气有限公司 | Single-phase power electronic transformer and control method thereof |
| CN114070103A (en) * | 2020-08-07 | 2022-02-18 | 南京南瑞继保电气有限公司 | Active damping control method for improving fault ride-through capability of grid-connected converter |
| WO2022078521A1 (en) * | 2020-10-16 | 2022-04-21 | 中车永济电机有限公司 | Method for composite detection and control of sudden load change in four-quadrant converter of locomotive |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130181654A1 (en) * | 2012-01-18 | 2013-07-18 | Hamilton Sundstrand Corporation | Motor drive system employing an active rectifier |
| CN110138190A (en) * | 2019-06-03 | 2019-08-16 | 乐山一拉得电网自动化有限公司 | A kind of control method of four quadrant convertor |
| CN110474557A (en) * | 2019-08-21 | 2019-11-19 | 中车永济电机有限公司 | A kind of direct-drive permanent-magnetism electric locomotive four quadrant convertor control strategy and modulator approach |
-
2019
- 2019-12-05 CN CN201911236869.5A patent/CN110912136A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130181654A1 (en) * | 2012-01-18 | 2013-07-18 | Hamilton Sundstrand Corporation | Motor drive system employing an active rectifier |
| CN110138190A (en) * | 2019-06-03 | 2019-08-16 | 乐山一拉得电网自动化有限公司 | A kind of control method of four quadrant convertor |
| CN110474557A (en) * | 2019-08-21 | 2019-11-19 | 中车永济电机有限公司 | A kind of direct-drive permanent-magnetism electric locomotive four quadrant convertor control strategy and modulator approach |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111697836A (en) * | 2020-05-07 | 2020-09-22 | 南京南瑞继保电气有限公司 | Single-phase power electronic transformer and control method thereof |
| CN114070103A (en) * | 2020-08-07 | 2022-02-18 | 南京南瑞继保电气有限公司 | Active damping control method for improving fault ride-through capability of grid-connected converter |
| WO2022078521A1 (en) * | 2020-10-16 | 2022-04-21 | 中车永济电机有限公司 | Method for composite detection and control of sudden load change in four-quadrant converter of locomotive |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110912136A (en) | Four-quadrant rectification control method for motor train unit | |
| CN104617685B (en) | A kind of contact inductive electric energy transmission control unit and method thereof | |
| CN109412425B (en) | Three-level-four-quadrant frequency converter with direct voltage fluctuation suppression function and control method | |
| US10352298B2 (en) | Wind generation system and controlling method thereof | |
| CN111371326A (en) | Three-phase double-active-bridge direct current converter control system and control method | |
| CN204615631U (en) | A kind of busbar voltage ripple compensation control circuit of circuit of power factor correction | |
| CN109787265B (en) | Flexible direct-current transmission system coordination control method for stabilizing new energy output fluctuation | |
| CN113037156B (en) | Control method of hybrid excitation generator | |
| CN103078322A (en) | Harmonic controller for energy-storing system of wind-power plant and parameter-setting method thereof | |
| CN109755953A (en) | A kind of AC/DC Power System steady state voltage cooperative control method that phase modifier participates in | |
| CN112787495B (en) | Variable frequency controller and control method thereof, variable frequency electric appliance and electronic equipment | |
| CN105375809A (en) | Output feedback decoupling-based low switching frequency control method for PWM converter | |
| EP2595298A1 (en) | Rectifier circuit device | |
| CN108306311B (en) | Control system and method for responding to power grid frequency modulation demand between DC load system partitions | |
| CN113422441A (en) | High-efficiency voltage-stabilizing wireless charging system for electric automobile and design method thereof | |
| CN102969716A (en) | Method for controlling active power filter of marine electrical network | |
| JP2007236178A (en) | Ac-dc interconnected power conversion device | |
| CN104701846A (en) | Current transformer harmonic compensation control method of permanent magnetic direct drive wind power system | |
| Li et al. | Analysis and control of post regulation of wireless power transfer systems | |
| CN108336763B (en) | Active and reactive decoupling control-based parallel connection method of H-bridge cascaded shore power supply | |
| CN110391726A (en) | Unidirectional three-phase star connects the suppressing method of controlled rectifier input current Zero-crossing Distortion | |
| CN115579959A (en) | Active control method and system for impedance adapter of multi-inverter grid-connected system | |
| CN112737457B (en) | Stability control method for permanent magnet auxiliary synchronous reluctance motor | |
| CN113517724B (en) | Method for suppressing voltage ripple on direct current side of alternating current-direct current hybrid micro-grid | |
| CN115242065A (en) | Topology for reducing uncontrolled rectified voltage ripple and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |