CN113507231A - Rail transit inverter control method and system based on three-carrier pulse width modulation - Google Patents
Rail transit inverter control method and system based on three-carrier pulse width modulation Download PDFInfo
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- CN113507231A CN113507231A CN202110797850.9A CN202110797850A CN113507231A CN 113507231 A CN113507231 A CN 113507231A CN 202110797850 A CN202110797850 A CN 202110797850A CN 113507231 A CN113507231 A CN 113507231A
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- 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
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac 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
- H02M7/537—Conversion of dc power input into ac 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, e.g. single switched pulse inverters
- H02M7/539—Conversion of dc power input into ac 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, e.g. single switched pulse inverters with automatic control of output wave form or frequency
- H02M7/5395—Conversion of dc power input into ac 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, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
-
- 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
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac 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
- H02M7/537—Conversion of dc power input into ac 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, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac 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, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac 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, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
- H02M7/53875—Conversion of dc power input into ac 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, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current with analogue control of three-phase output
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention provides a control method of a track traffic inverter based on three-carrier pulse width modulation, which comprises the steps of generating three groups of carriers and modulating waves, wherein each group of carriers and modulating waves respectively correspond to three phases a, b and c of the inverter, the phase difference between the three carriers is 120, comparing the three modulating waves with the three carriers, and generating three-phase pulse width modulating waves of the track traffic inverter to control the three-phase inverter. According to the invention, the generated three-phase pulse width modulation waves of the rail transit inverter have the same pulse width quantity and the same pulse width duration time by defining the carrier waves and the modulation waves of the three-carrier pulse width modulation and a comparison mode.
Description
Technical Field
The invention relates to a rail transit inverter control technology, in particular to a rail transit inverter control method and a rail transit inverter control system based on three-carrier pulse width modulation.
Background
The traction converter is one of key parts of a train, is arranged at the bottom of a motor train of the train, and has the main functions of converting electric energy between a direct current system and an alternating current system, converting 1500V direct current from a contact network into 0-1150V three-phase alternating current, and realizing starting, braking and speed regulation control of an alternating current traction motor through voltage regulation and frequency regulation control. The rail transit traction converter is one of key parts of a train, and has the main function of converting electric energy between a direct current system and an alternating current system.
The carrier pulse width modulation technology is widely applied to a rectifier and an inverter of a power electronic converter system, but in the traditional inverter control, a three-phase reference sine wave is compared with a triangular carrier, and the number of wave heads of the three-phase pulse width modulation wave generated after comparison is different from the duration time of each pulse width. For example, the patent "PWM modulation method for four-leg dual-output inverter carrier under unbalanced load" can implement the modulation of the inverter carrier of multiple legs, but the number of the compared PWM wave heads is not consistent with the pulse width.
Disclosure of Invention
The invention aims to provide a rail transit inverter control method and system based on three-carrier pulse width modulation.
The technical solution for realizing the purpose of the invention is as follows: a rail transit inverter control method based on three-carrier pulse width modulation comprises the following specific steps:
three groups of carrier waves and modulation waves are generated, each group of carrier waves and modulation waves respectively correspond to three phases a, b and c of the inverter, the phase difference between the three carrier waves is 120, the three modulation waves are compared with the three carrier waves, and a three-phase pulse width modulation wave of the track traffic inverter is generated to control the three-phase inverter, wherein the comparison mode specifically comprises the following steps:
defining three carriers as Uary _ a, Uary _ b and Uary _ c respectively, and three modulated waves as Ua, Ub and Uc respectively, then generating the trigger pulse of the three-phase upper tube switching device according to the principle:
if Ua is larger than or equal to Uary _ a, the switching device triggering pulse PWM _ A1 of the phase a upper tube is equal to 1, and if Ua is smaller than Uary _ a, the switching device triggering pulse PWM _ A1 of the phase a upper tube is equal to 0;
if Ub is larger than or equal to Uary _ B, the switching device triggering pulse PWM _ B1 of the B-phase tube is equal to 1, and if Ub is smaller than Uary _ B, the switching device triggering pulse PWM _ B1 of the B-phase tube is equal to 0;
if the Uc is larger than or equal to the Uary _ C, the trigger pulse PWM _ C1 of the C-phase tube switching device is equal to 1, and if the Uc is smaller than the Uary _ C, the trigger pulse PWM _ C1 of the C-phase 1 tube switching device is equal to 0;
the principle of generating the trigger pulse of the three-phase lower tube switching device is as follows:
the a-phase lower tube switching device trigger pulse PWM _ a2 ═ |! PWM _ a 1;
b-phase lower tube switching device trigger pulse PWM _ B2 ═ |! PWM _ B1;
c-phase lower tube switching device trigger pulse PWM _ C2 ═ |! PWM _ B1.
Further, the carrier wave is in the form of a rectangular carrier wave and a triangular carrier wave.
Further, the modulation wave is a sine wave or a wave added with a zero sequence component.
Further, the maximum amplitude of the modulation waves Ua, Ub, Uc is the reference voltage of the three-phase inverter.
A rail transit inverter control system based on three-carrier pulse width modulation realizes rail transit inverter control based on three-carrier pulse width modulation based on the rail transit inverter control method.
A computer device comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, and when the processor executes the computer program, the control of a track traffic inverter based on three-carrier pulse width modulation is realized based on the control method of the track traffic inverter.
A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements a three-carrier pulse width modulation-based track traffic inverter control based on the track traffic inverter control method.
Compared with the prior art, the invention has the following remarkable advantages: the generated three-phase pulse width modulation waves of the track traffic inverter have the same pulse width quantity and the same pulse width duration time by defining the carrier waves and the modulation waves of the three-carrier pulse width modulation and a comparison mode.
Drawings
Fig. 1 is a schematic diagram of a comparison mode of a rail transit inverter control method based on three-carrier pulse width modulation.
Fig. 2 is a schematic diagram of a comparison mode of a rail transit inverter control method based on single carrier pulse width modulation.
Fig. 3 is a phase relationship diagram of a three-phase carrier wave and a three-phase modulated wave.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The invention relates to a control method of a track traffic inverter based on three-carrier pulse width modulation, which comprises the following specific steps:
three groups of carrier waves and modulation waves are generated, each group of carrier waves and modulation waves respectively correspond to three phases a, b and c of the inverter, the phase difference between the three carrier waves is 120, the three modulation waves are compared with the three carrier waves, and three-phase pulse width modulation waves of the track traffic inverter are generated, wherein the comparison mode specifically comprises the following steps:
defining three carriers as Uary _ a, Uary _ b and Uary _ c respectively, and three modulated waves as Ua, Ub and Uc respectively corresponding to a-phase, b-phase and c-phase of the inverter respectively, and generating a trigger pulse of a three-phase upper tube switching device according to the following principle:
if Ua is larger than or equal to Uary _ a, the switching device triggering pulse PWM _ A1 of the phase a upper tube is equal to 1, and if Ua is smaller than Uary _ a, the switching device triggering pulse PWM _ A1 of the phase a upper tube is equal to 0;
if Ub is larger than or equal to Uary _ B, the switching device triggering pulse PWM _ B1 of the B-phase tube is equal to 1, and if Ub is smaller than Uary _ B, the switching device triggering pulse PWM _ B1 of the B-phase tube is equal to 0;
if the Uc is larger than or equal to the Uary _ C, the trigger pulse PWM _ C1 of the C-phase tube switching device is equal to 1, and if the Uc is smaller than the Uary _ C, the trigger pulse PWM _ C1 of the C-phase 1 tube switching device is equal to 0;
the principle of generating the trigger pulse of the three-phase lower tube switching device is as follows:
the a-phase lower tube switching device trigger pulse PWM _ a2 ═ |! PWM _ a 1;
b-phase lower tube switching device trigger pulse PWM _ B2 ═ |! PWM _ B1;
c-phase lower tube switching device trigger pulse PWM _ C2 ═ |! PWM _ B1.
In a preferred embodiment, the carriers are in the form of rectangular carriers and triangular carriers.
In a preferred embodiment, the modulation wave is a sine wave or a wave with a zero sequence component added.
As a preferred embodiment, the maximum amplitudes of the modulated waves Ua, Ub, Uc are respectively the reference voltages of the three-phase inverter.
In summary, the three-carrier pulse width modulation carrier waves and the three-carrier pulse width modulation modulated waves are defined, and the comparison method enables the generated three-phase pulse width modulation waves of the track traffic inverter to have the same pulse width quantity and the same pulse width duration.
Examples
To verify the validity of the inventive scheme, the following simulation experiment was performed.
As shown in fig. 1 and 3, ucary _ a, ucary _ b, and ucary _ c are carriers of a-phase, b-phase, and c-phase, respectively, and b-phase is delayed by 120 ° and c-phase is delayed by 120 ° on a-phase basis. Ua, Ub, Uc are modulated waves of a-phase, b-phase, and c-phase, respectively. PWM _ a1, PWM _ B1, and PWM _ C1 are pulse width modulation waves of a-phase, B-phase, and C-phase, respectively. It can be seen that the three-phase pulse width modulation waves of the rail transit inverter generated by the method have the same pulse width quantity and the same pulse width duration.
As shown in fig. 2, only one carrier Ucarry _ a is compared with Ua, Ub and Uc, and the generated three-phase pulse width modulation waves PWM _ A1, PWM _ B1 and PWM _ C1 of the rail transit inverter have inconsistent wave head number and pulse width.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. A rail transit inverter control method based on three-carrier pulse width modulation is characterized by comprising the following specific steps:
three groups of carrier waves and modulation waves are generated, each group of carrier waves and modulation waves respectively correspond to three phases a, b and c of the inverter, the phase difference between the three carrier waves is 120, the three modulation waves are compared with the three carrier waves, and a three-phase pulse width modulation wave of the track traffic inverter is generated to control the three-phase inverter, wherein the comparison mode specifically comprises the following steps:
defining three carriers as Uary _ a, Uary _ b and Uary _ c respectively, and three modulated waves as Ua, Ub and Uc respectively, then generating the trigger pulse of the three-phase upper tube switching device according to the principle:
if Ua is larger than or equal to Uary _ a, the switching device triggering pulse PWM _ A1 of the phase a upper tube is equal to 1, and if Ua is smaller than Uary _ a, the switching device triggering pulse PWM _ A1 of the phase a upper tube is equal to 0;
if Ub is larger than or equal to Uary _ B, the switching device triggering pulse PWM _ B1 of the B-phase tube is equal to 1, and if Ub is smaller than Uary _ B, the switching device triggering pulse PWM _ B1 of the B-phase tube is equal to 0;
if the Uc is larger than or equal to the Uary _ C, the trigger pulse PWM _ C1 of the C-phase tube switching device is equal to 1, and if the Uc is smaller than the Uary _ C, the trigger pulse PWM _ C1 of the C-phase 1 tube switching device is equal to 0;
the principle of generating the trigger pulse of the three-phase lower tube switching device is as follows:
the a-phase lower tube switching device trigger pulse PWM _ a2 ═ |! PWM _ a 1;
b-phase lower tube switching device trigger pulse PWM _ B2 ═ |! PWM _ B1;
c-phase lower tube switching device trigger pulse PWM _ C2 ═ |! PWM _ B1.
2. The rail transit inverter control method based on three-carrier pulse width modulation according to claim 1, wherein the carriers are in the form of rectangular carriers and triangular carriers.
3. The control method of the track traffic inverter based on three-carrier pulse width modulation according to claim 1, wherein the modulation wave is a sine wave or a wave added with a zero-sequence component.
4. The control method of the track traffic inverter based on three-carrier pulse width modulation according to claim 1, wherein the maximum amplitude of the modulation waves Ua, Ub, Uc is the reference voltage of a three-phase inverter.
5. A rail transit inverter control system based on three-carrier pulse width modulation is characterized in that the rail transit inverter control based on the three-carrier pulse width modulation is realized based on the rail transit inverter control method of any one of claims 1 to 4.
6. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor executes the computer program to realize a three-carrier pulse width modulation based rail transit inverter control method according to any one of claims 1 to 4.
7. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements a three-carrier pulse width modulation-based track traffic inverter control based on the track traffic inverter control method according to any one of claims 1 to 4.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114257114A (en) * | 2021-12-11 | 2022-03-29 | 中科华士电气科技南京有限公司 | Three-level converter control method and system based on carrier phase shift modulation |
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| CN103401460A (en) * | 2013-06-29 | 2013-11-20 | 华为技术有限公司 | Method and device for PWM (pulse width modulation) of three-phase carrier waves |
| US20170005608A1 (en) * | 2014-03-04 | 2017-01-05 | Mitsubishi Heavy Industries Automotive Thermal Sys Tems Co., Ltd. | Inverter control apparatus and inverter apparatus |
| CN109713969A (en) * | 2018-12-20 | 2019-05-03 | 西北工业大学 | A kind of permanent magnet synchronous motor sinusoid pulse width modulation change carrier control method |
| CN110336480A (en) * | 2019-07-22 | 2019-10-15 | 中国科学院电工研究所 | A kind of three-level current transformer square-wave frequency modulation method realized based on carrier wave |
| CN112187075A (en) * | 2020-11-05 | 2021-01-05 | 武汉理工大学 | Three-phase four-bridge arm inverter interference pulse width modulation system and method |
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2021
- 2021-07-14 CN CN202110797850.9A patent/CN113507231A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2008271617A (en) * | 2007-04-16 | 2008-11-06 | Hitachi Ltd | Power conversion device and control method therefor |
| CN103401460A (en) * | 2013-06-29 | 2013-11-20 | 华为技术有限公司 | Method and device for PWM (pulse width modulation) of three-phase carrier waves |
| US20170005608A1 (en) * | 2014-03-04 | 2017-01-05 | Mitsubishi Heavy Industries Automotive Thermal Sys Tems Co., Ltd. | Inverter control apparatus and inverter apparatus |
| CN109713969A (en) * | 2018-12-20 | 2019-05-03 | 西北工业大学 | A kind of permanent magnet synchronous motor sinusoid pulse width modulation change carrier control method |
| CN110336480A (en) * | 2019-07-22 | 2019-10-15 | 中国科学院电工研究所 | A kind of three-level current transformer square-wave frequency modulation method realized based on carrier wave |
| CN112187075A (en) * | 2020-11-05 | 2021-01-05 | 武汉理工大学 | Three-phase four-bridge arm inverter interference pulse width modulation system and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114257114A (en) * | 2021-12-11 | 2022-03-29 | 中科华士电气科技南京有限公司 | Three-level converter control method and system based on carrier phase shift modulation |
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Application publication date: 20211015 |