CN106684826A - SVPWM based three-phase PWM rectifier algorithm boundary protection method - Google Patents
SVPWM based three-phase PWM rectifier algorithm boundary protection method Download PDFInfo
- Publication number
- CN106684826A CN106684826A CN201710147048.9A CN201710147048A CN106684826A CN 106684826 A CN106684826 A CN 106684826A CN 201710147048 A CN201710147048 A CN 201710147048A CN 106684826 A CN106684826 A CN 106684826A
- Authority
- CN
- China
- Prior art keywords
- voltage vector
- pwm rectifier
- phase pwm
- svpwm
- protection method
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000013598 vector Substances 0.000 claims abstract description 46
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims 1
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/125—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers
- H02H7/1252—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers responsive to overvoltage in input or output, e.g. by load dump
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The invention provides an SVPWM based three-phase PWM rectifier algorithm boundary protection method, comprising: performing CLARK transform to the voltage vector of a power grid; calculating the instruction voltage vector outputted by a current loop; calculating the differential value between the voltage vector of the power grid and the instruction voltage vector; when the differential value exceeds a threshold, executing the protection procedure immediately and locking the IGBT; and otherwise, outputting the instruction voltage vector normally. The SVPWM based three-phase PWM rectifier algorithm boundary protection method of the invention can effectively prevent the IGBT of a three-phase PWM rectifier from being damaged due to software debugging, external interference, and wiring error. Compared with over-current protection, the protection method is more rapid and reliable.
Description
Technical field
The present invention relates to electronic technology field, more particularly to a kind of Three-Phase PWM Rectifier algorithm border based on SVPWM is protected
Maintaining method.
Background technology
SVPWM is the abbreviation of space vector pulse width modulation (Space Vector Pulse Width Modulation).
The main thought of SVPWM is that three-phase symmetrical motor stator sub-ideal magnetic linkage is justified as reference when being powered with three-phase symmetrical sine voltage
Standard, with three-phase inverter difference switching mode appropriate switching is made, so as to form PWM ripples, with the actual magnetic linkage arrow for being formed
Measure to follow the trail of its accurate magnetic linkage circle.Traditional SPWM methods from the angle of power supply, to generate a Frequency Adjustable pressure regulation just
String ripple power supply, and inversion system and asynchronous machine are regarded as an entirety to consider by SVPWM methods, model is fairly simple, also just
In the real-time control of microprocessor.The theoretical basiss of SVPWM are the meansigma methodss principle of equal effects, i.e., by right in a switch periods
Basic voltage vectors are combined so as to which meansigma methodss are equal with given voltage vector.Sometime, voltage vector rotates to certain
In individual region, various combination that can be by two that constitute this region adjacent non-zeros and zero vector in time comes
Arrive.The action time of two vectors applies several times within a sampling period, so as to during the effect for controlling each voltage vector
Between, it is close to space vector of voltage and rotates by Circular test, go to approach ideal by the actual magnetic flux produced by different on off states
Magnetic flux is justified and determines on off state by both comparative results, so as to form PWM waveform.The control method dynamic is good, tool
Have that DC voltage utilization rate is high, harmonic wave is little, effectively using input voltage, and harmonic loss can be reduced, and be easy to microprocessor
The advantages of digital form of device is realized.
The topological structure that Three-Phase PWM Rectifier typically passes through inductance connection to electrical network using three-phase IGBT bridge arms.For this
Class PWM rectifier, the bigger net side inductance of power can be less, and such as PWM rectifier of a 200kW, its net side inductance is typically little
In 1mH, the impedance of its correspondence 50Hz is also very little, once the voltage of rectifier converter output error for some reason, for example
Measurement and the detection signal caused changer that is interfered calculate output error, can cause inductance both end voltage deviation very
Greatly, so as to causing serious excessively stream or short-circuit conditions.Commutator may export contrary voltage and cause IGBT under extreme case
Moment demolishs.
The content of the invention
The technical problem to be solved in the present invention is：A kind of Three-Phase PWM Rectifier algorithm boundary protection based on SVPWM is provided
Method, it damages Three-Phase PWM Rectifier in the case of being prevented effectively from due to software debugging, external disturbance, wiring error
IGBT, compares overcurrent protection more quick, reliable.
What the solution of the present invention was realized in：A kind of Three-Phase PWM Rectifier algorithm boundary protection based on SVPWM
Method, comprises the following steps：
S1, CLARK conversion is carried out to line voltage vector, it is false by line voltage vector to two-phase rest frame
If the voltage vector after conversion is
S2, the command voltage vector of calculating current ring output, by control program electric current loop control voltage vector is calculated
As SVPWM modules input, it is assumed that PWM rectifier electric current loop output command voltage vector be
S3, the difference for calculating line voltage vector and command voltage vector,And calculate Δ vαβAmplitude | Δ vαβ|；
S4, as | Δ vαβ| exceedWhen, defence program is immediately performed, IGBT is blocked, otherwise normal output refers to
Make voltage vector；
Wherein, LfFor net side inductance,For maximum protection current phasor, ω is electrical network angular frequency.
Another technical scheme of the present invention is the maximum protection current phasor on above-mentioned basisFor net
The twice of side rated current maximum.
The present invention another technical scheme be it is above-mentioned basis on, when PWM rectifier under steady state conditions, electric current is
The sine wave of 50Hz, the peak value of electric current is
Another technical scheme of the present invention is that the Three-Phase PWM Rectifier includes IGBT bridge arms on above-mentioned basis,
The net side inductance L1 being arranged in triple line and input main contactor KM1, the precharge in parallel with the input main contactor KM1
Catalyst KM2, the dc-link capacitance C1 being connected with dc bus two ends.
As can be seen from the above technical solutions, the embodiment of the present invention has advantages below：It is of the present invention based on SVPWM
Three-Phase PWM Rectifier algorithm boundary protection method, the method control software by the voltage instruction for exporting to SVPWM modules it
Front to be compared with line voltage, whether difference exceedes setting border between decision instruction voltage vector and line voltage vector,
Once it was found that voltage deviation exceeds border, being then immediately performed defence program, IGBT, backed off after random running status are blocked.Institute of the present invention
The Three-Phase PWM Rectifier algorithm boundary protection method based on SVPWM stated, can be prevented effectively from because software debugging, outside are dry
The IGBT of Three-Phase PWM Rectifier is disturbed, damages in the case of wiring error, it is more quick, reliable to compare overcurrent protection, with very
Important practical value.
Description of the drawings
The accompanying drawing for constituting the part of the present invention is used for providing a further understanding of the present invention, the schematic reality of the present invention
Apply example and its illustrate, for explaining the present invention, not constituting inappropriate limitation of the present invention.
Fig. 1 is the stream of the Three-Phase PWM Rectifier algorithm boundary protection method in one embodiment of the present invention based on SVPWM
Cheng Tu；
Fig. 2 is the schematic diagram of Three-Phase PWM Rectifier in boundary protection method shown in Fig. 1.
Specific embodiment
Describe the present invention below in conjunction with the accompanying drawings, the description of this part is only exemplary and explanatory, should not
There is any restriction effect to protection scope of the present invention.Additionally, description of the those skilled in the art according to presents, can be right
Feature in presents in embodiment and in different embodiments carries out respective combination.
Term " first ", " second ", " the 3rd " " in description and claims of this specification and above-mentioned accompanying drawing
Four " etc. (if present) is the object for distinguishing similar, without for describing specific order or precedence.Should manage
The data that solution is so used can be exchanged in the appropriate case, so as to embodiments of the invention described herein, for example can be with
Order in addition to those for illustrating here or describing is implemented.Additionally, term " comprising " and " having " and they appoint
What deforms, it is intended that cover it is non-exclusive includes, for example, contain the process of series of steps or unit, method, system,
Product or equipment are not necessarily limited to those steps clearly listed or unit, but may include clearly not list or for
Other intrinsic steps of these processes, method, product or equipment or unit.
The embodiment of the present invention is as follows, as depicted in figs. 1 and 2, a kind of Three-Phase PWM Rectifier algorithm border based on SVPWM
Guard method, comprises the following steps：
S1, CLARK conversion is carried out to line voltage vector, it is false by line voltage vector to two-phase rest frame
If the voltage vector after conversion is
S2, the command voltage vector of calculating current ring output, by control program electric current loop control voltage vector is calculated
As SVPWM modules input, it is assumed that PWM rectifier electric current loop output command voltage vector be
S3, the difference for calculating line voltage vector and command voltage vector,And calculate Δ vαβAmplitude | Δ vαβ|；
S4, as | Δ vαβ| exceedWhen, defence program is immediately performed, IGBT is blocked, otherwise normal output refers to
Make voltage vector；
Wherein, LfFor net side inductance,For maximum protection current phasor, ω is electrical network angular frequency.
According to the ability to bear of IGBT,Maximum protection electric current can be set as the twice of rated current maximum surely.
In PWM rectifier under steady state conditions, electric current for 50Hz sine wave, and current peak isHaveFor in a switch periods.According toDuring due to using SVPWM, VbusΔ
t-ΔvαβTs-LfΔi.Variation：As Δ vαβWhen limiting within the specific limits, this electric current is opened for one
Largest current change in the cycle of pass.Both sides modulus can be obtained：Therefore maximum differential pressure is limited, actually
Also limit largest current change in a switch periods.
It is known alternative approach it should be noted that carrying out CLARK conversion to line voltage vector, it will be separated by
The Alternating Current Power Supply of the three-phase symmetrical of 120o, is transformed into the biphase Alternating Current Power Supply for wanting to be spaced 90o.Concrete conversion process is repeated no more.
In addition, in step S4, the defence program of execution can be existing program, need to only be blocked IGBT, at this
Also it is not described in detail.
On the basis of above-described embodiment, in another embodiment of the present invention, as shown in Fig. 2 the Three-Phase PWM Rectifier can
With including IGBT bridge arms；The net side inductance L1 being arranged in triple line and input main contactor KM1, the net side inductance L1, match somebody with somebody
IGBT is closed for the control of PWM rectified currents；The pre-charge contactor KM2 in parallel with the input main contactor KM1, with precharge
The precharge current-limiting resistance HR1 that catalyst KM2 is respectively in series, HR2, HR3；The dc-link capacitance being connected with dc bus two ends
C1, for busbar voltage support.
Specifically, for example, commutator net side inductance is 1mH, and net side rated voltage virtual value 380V, commutator net side is specified
Current peak is 100A, maximum protection current limitFor 200A, line voltage frequency is 50Hz, can be calculated
Electrical network angular frequency ω, is 2 × 3.14 × 50=314.Assume that rectifier switch frequency is 4kHz, corresponding switch periods TsFor
0.00025s.Can be calculated by formula calculated aboveTherefore the side pressure of inductance two can be limited
Spread value should be less than 62.8V.The largest current change in a switch periods | Δ imax| for 62.8 × 0.00025/0.001=
15.7A.Boundary protection Programmable detection, more than starting protection program during 62.8V, blocks IGBT to inductance two ends pressure reduction, reaches in advance
The purpose of protection.And for example, rectifier output voltage should be controlled in no-load running consistent with line voltage, so as to control electric current
Near zero.Cause command voltage direction for some reason reversely, actual loaded inductance both end voltage is twice line voltage,
Now inductive current maximum rising value in a switch periods | Δ imax| for 536*2 × 0.00025/0.001=268A, this
Electric current seriously bears electric current more than IGBT, and typically cannot meet requirement by detecting the method rapidity that electric current is protected,
Trigger protection is unable in this switch periods, in second switch periods IGBT may be burnt.
As can be seen from the above technical solutions, the embodiment of the present invention has advantages below：It is of the present invention based on SVPWM
Three-Phase PWM Rectifier algorithm boundary protection method, the method control software by the voltage instruction for exporting to SVPWM modules it
Front to be compared with line voltage, whether difference exceedes setting border between decision instruction voltage vector and line voltage vector,
Once it was found that voltage deviation exceeds border, being then immediately performed defence program, IGBT, backed off after random running status are blocked.Institute of the present invention
The Three-Phase PWM Rectifier algorithm boundary protection method based on SVPWM stated, can be prevented effectively from because software debugging, outside are dry
The IGBT of Three-Phase PWM Rectifier is disturbed, damages in the case of wiring error, it is more quick, reliable to compare overcurrent protection, with very
Important practical value.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (4)
1. a kind of Three-Phase PWM Rectifier algorithm boundary protection method based on SVPWM, it is characterised in that comprise the following steps：
S1, CLARK conversion is carried out to line voltage vector, by line voltage vector to two-phase rest frame, it is assumed that become
Voltage vector after changing is
S2, the command voltage vector of calculating current ring output, calculate control voltage vector and are used as by control program electric current loop
SVPWM modules are input into, it is assumed that the command voltage vector of the electric current loop of PWM rectifier output is
S3, the difference for calculating line voltage vector and command voltage vector,And calculate Δ vαβWidth
Value | Δ vαβ|；
S4, as | Δ vαβ| exceedWhen, defence program is immediately performed, IGBT is blocked, otherwise normal output order electricity
Pressure vector；
Wherein, LfFor net side inductance,For maximum protection current phasor, ω is electrical network angular frequency.
2. the Three-Phase PWM Rectifier algorithm boundary protection method based on SVPWM according to claim 1, it is characterised in that
The maximum protection current phasorFor the twice of net side rated current maximum.
3. the Three-Phase PWM Rectifier algorithm boundary protection method based on SVPWM according to claim 1, it is characterised in that
When PWM rectifier under steady state conditions, electric current for 50Hz sine wave, the peak value of electric current is
4. the Three-Phase PWM Rectifier algorithm boundary protection method based on SVPWM according to any one of claim 1 to 3,
Characterized in that, the Three-Phase PWM Rectifier includes IGBT bridge arms, the net side inductance L1 being arranged in triple line and input master connect
Tentaculum KM1, the pre-charge contactor KM2 in parallel with the input main contactor KM1, the direct current being connected with dc bus two ends is female
Line capacitance C1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710147048.9A CN106684826B (en) | 2017-03-13 | 2017-03-13 | A kind of Three-Phase PWM Rectifier algorithm boundary protection method based on SVPWM |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710147048.9A CN106684826B (en) | 2017-03-13 | 2017-03-13 | A kind of Three-Phase PWM Rectifier algorithm boundary protection method based on SVPWM |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106684826A true CN106684826A (en) | 2017-05-17 |
| CN106684826B CN106684826B (en) | 2019-01-08 |
Family
ID=58826120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710147048.9A Active CN106684826B (en) | 2017-03-13 | 2017-03-13 | A kind of Three-Phase PWM Rectifier algorithm boundary protection method based on SVPWM |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106684826B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080303489A1 (en) * | 2007-06-08 | 2008-12-11 | Jung-Woo Park | Controller of doubly-fed induction generator |
| US20130051103A1 (en) * | 2011-08-30 | 2013-02-28 | Rolls-Royce Plc | Method of controlling an inverter and a controller for controlling an inverter |
| CN103259284A (en) * | 2013-04-22 | 2013-08-21 | 华中科技大学 | Voltage vector stabilizer based on phase-locked loop and control method of voltage vector stabilizer |
| CN103280811A (en) * | 2013-06-14 | 2013-09-04 | 湖南大学 | Novel power quality control system with fault current-limiting function and control method thereof |
-
2017
- 2017-03-13 CN CN201710147048.9A patent/CN106684826B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080303489A1 (en) * | 2007-06-08 | 2008-12-11 | Jung-Woo Park | Controller of doubly-fed induction generator |
| US20130051103A1 (en) * | 2011-08-30 | 2013-02-28 | Rolls-Royce Plc | Method of controlling an inverter and a controller for controlling an inverter |
| CN103259284A (en) * | 2013-04-22 | 2013-08-21 | 华中科技大学 | Voltage vector stabilizer based on phase-locked loop and control method of voltage vector stabilizer |
| CN103280811A (en) * | 2013-06-14 | 2013-09-04 | 湖南大学 | Novel power quality control system with fault current-limiting function and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106684826B (en) | 2019-01-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| An et al. | Current residual vector-based open-switch fault diagnosis of inverters in PMSM drive systems | |
| Cecati et al. | Comprehensive modeling and experimental testing of fault detection and management of a nonredundant fault-tolerant VSI | |
| Omar et al. | Modeling and simulation for voltage sags/swells mitigation using dynamic voltage restorer (DVR) | |
| CN103475004B (en) | Suppress static reacance generator SVG and the control method of unbalanced load | |
| CN106849702B (en) | A kind of Novel rotary rectifier with malfunction monitoring function | |
| Hoffmann et al. | Observer-based grid voltage disturbance rejection for grid connected voltage source PWM converters with line side LCL filters | |
| Estima et al. | Fast fault detection, isolation and reconfiguration in fault-tolerant permanent magnet synchronous motor drives | |
| BR102014023057A2 (en) | method and equipment for the elimination of harmonic components and the obtaining of a unit power factor in alternating current - direct current and direct current - alternating current converters | |
| JP5300349B2 (en) | Motor control device and motor ground fault detection method | |
| CN108574439A (en) | Space vector control method for fault-tolerant system of permanent magnet synchronous motor | |
| CN110943469A (en) | Single-stage energy storage converter and control method thereof | |
| CN109327153A (en) | The single-phase off-network inverter control method of photovoltaic | |
| CN102780414B (en) | Device and method for inhibiting inrush starting current for large-power grid-connected inverter | |
| Khelif et al. | A combined RMS-mean value approach for an inverter open-circuit fault detection | |
| Zhang et al. | A robust open-circuit fault diagnosis method for three-level T-type inverters based on phase voltage vector residual under modulation mode switching | |
| Zhang et al. | A simple open-circuit fault diagnosis method for grid-tied T-type three-level inverters with various power factors based on instantaneous current distortion | |
| CN107528495B (en) | A kind of control method and system improving PWM inverter impact resistance | |
| Zhang et al. | Current-Limiting Strategy for Asymmetric Short-Circuit of Three-Phase Inverter for Continuous Power Supply of Non-Faulty Loads | |
| CN106684826A (en) | SVPWM based three-phase PWM rectifier algorithm boundary protection method | |
| CN113950792B (en) | Power regeneration converter and processing method thereof | |
| Ouchen et al. | Low voltage ride through control for grid-connected inverter under balanced and unbalanced voltage drops | |
| Zhang et al. | Cost-efficient fault-tolerant scheme for three-phase surface-mounted permanent magnet synchronous machines fed by multifunctional converter system under open-phase faults | |
| CN109802405B (en) | Inverter resonance suppression method based on power grid voltage abnormal state feedback | |
| CN107196496B (en) | The vector type soft-start method of PWM rectifier | |
| CN106877693A (en) | A kind of circulation inhibition method of three-phase rectifier |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210120 Address after: 411100 No.28 Baishi Road, Jingkai District, Xiangtan City, Hunan Province Patentee after: WASION ENERGY INDUSTRY TECHNOLOGY Co.,Ltd. Address before: 410205 No.11 workshop of Weisheng Science Park Phase II project, no.468 tongzipo West Road, national high tech Industrial Development Zone, Changsha City, Hunan Province Patentee before: HUNAN LINENG TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CP03 | Change of name, title or address |
Address after: 411201 28 Bai Shi Road, Jing Kai District, Xiangtan, Hunan Patentee after: Hunan Weiyuan Technology Co.,Ltd. Country or region after: China Address before: 411100 No.28 Baishi Road, Jingkai District, Xiangtan City, Hunan Province Patentee before: WASION ENERGY INDUSTRY TECHNOLOGY CO.,LTD. Country or region before: China |