CN107919826A - A kind of train power generation machine excitation chopper based on DSP - Google Patents
A kind of train power generation machine excitation chopper based on DSP Download PDFInfo
- Publication number
- CN107919826A CN107919826A CN201711339803.XA CN201711339803A CN107919826A CN 107919826 A CN107919826 A CN 107919826A CN 201711339803 A CN201711339803 A CN 201711339803A CN 107919826 A CN107919826 A CN 107919826A
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- China
- Prior art keywords
- circuit
- dsp
- power generation
- generation machine
- machine excitation
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- 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.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/26—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices
- H02P9/30—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices
- H02P9/305—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices controlling voltage
-
- 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
- H02P2101/25—Special adaptation of control arrangements for generators for combustion engines
-
- 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
- H02P2103/00—Controlling arrangements characterised by the type of generator
- H02P2103/20—Controlling arrangements characterised by the type of generator of the synchronous type
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The present invention provides a kind of train power generation machine excitation chopper based on DSP, including sample circuit, control signal input circuit, dsp processor, PWM isolation circuits, power main circuit and power supply；The sample circuit and control signal input circuit is connected with the input terminal of dsp processor, the output terminal of PWM isolation circuits and dsp processor connects, PWM isolation circuits are connected with power main circuit, and the power supply is respectively sample circuit, control signal input circuit, dsp processor and the power supply of PWM isolation circuits；Stable state accuracy of the present invention is high, and dynamic response is fast, has perfect failure protection function.
Description
Technical field
The invention belongs to electric car apparatus field, more particularly, to a kind of train power generation machine excitation chopper based on DSP.
Background technology
Diesel electric locomotive generally provides electric energy needed for transmission by diesel generating set.Diesel engine is entirely to generate electricity
The power core of system, is the first order energy conversion device of diesel generating set, is the pass that chemical energy is converted to mechanical energy
Button apparatus.Synchronous generator is the second level energy conversion device of generator unit, is responsible for converting mechanical energy into electric energy.In order to
Ensure the stable electric energy of synchronous generator output, it is necessary to improve the performance of Excitation Controller, synchronous generator exciting
On the one hand control system is used to provide DC current to the magnetic field winding of generator, establish D.C. magnetic field, on the other hand can be
Synchronous motor normal operation or when accident occurs, adjust exciting current, to meet the needs of operation.So excitation system is synchronous
The important component of generator, operational reliability, economy on generator etc. has direct influence.
The content of the invention
In view of this, the present invention is directed to propose a kind of lasting accuracy is high, dynamic response is fast and possesses perfect error protection
The train power generation machine excitation chopper based on DSP of function.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of train power generation machine excitation chopper based on DSP, including at sample circuit, control signal input circuit, DSP
Manage device, PWM isolation circuits, power main circuit and power supply；The sample circuit and control signal input circuit with DSP processing
The input terminal of device is electrically connected, and the output terminal of dsp processor is electrically connected with PWM isolation circuits, PWM isolation circuits and power main circuit
It is electrically connected；The power supply is respectively sample circuit, control signal input circuit, dsp processor and the power supply of PWM isolation circuits.
Further, the PWM isolation circuits include driving enhancing module and optical coupling isolation circuit, dsp processor, drive
Dynamic enhancing module and optical coupling isolation circuit are sequentially connected.
Further, driving enhancing module is 74HCT245D digital integrated electronic circuits.
Further, it is uncontrollable whole to include IPM intelligent power module, three-phase alternating current source and three-phase for the power main circuit
Bridge is flowed, uncontrollable with three-phase rectifier bridge and optical coupling isolation circuit are connected IPM intelligent power module respectively, the uncontrollable rectifier bridge of three-phase
It is connected with three-phase alternating current source.
Further, the IPM intelligent power module, including two IGBT pipes, gate drive circuit and protection circuit,
One end of the first IGBT pipes is connected with one end half-bridge of the 2nd IGBT pipes, the other end of the first IGBT, the 2nd IGBT
The other end is coupled with gate drive circuit respectively, and gate drive circuit is connected with protection circuit.
Further, an Optical coupling resistance is also associated between the control signal input circuit and dsp processor, it is described
Optical coupling resistance be used for electrical isolation.
Further, couple an A/D modular converters on the dsp processor, AD conversion module respectively with sample circuit
Connection.
Further, modulate circuit, the modulate circuit are additionally provided between the A/D modular converters and sample circuit
Including filter circuit, amplifying circuit and amplitude limiter circuit, the filter circuit, amplifying circuit and amplitude limiter circuit are sequentially connected.
Further, the amplitude limiter circuit includes the output terminal of double diode, the double diode and amplifying circuit
Connection, the double diode are used for the amplitude for limiting input voltage.
Further, the sample circuit includes voltage sensor and current sensor.
Relative to the prior art, a kind of train power generation machine excitation chopper based on DSP of the present invention has following
Advantage：
The present invention has brush excitation system for the train synchronization generator of rated voltage 400V；It can realize synchronous generator
Set end voltage automatically adjusts, and can be adapted for separate excitation and self-excited system.Stable state accuracy of the present invention is high, and dynamic response is fast, has had
Kind failure protection function.
Brief description of the drawings
The attached drawing for forming the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its explanation is used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structure diagram described in the embodiment of the present invention；
Fig. 2 is the power main circuit diagram described in the embodiment of the present invention；
Fig. 3 is the PWM isolates circuit diagrams described in the embodiment of the present invention；
Fig. 4 is the digital input circuit figure described in the embodiment of the present invention；
Fig. 5 is the simulated measurement input circuit figure described in the embodiment of the present invention；
Fig. 6 is the excitation chopper system schematic diagram figure described in the embodiment of the present invention.
Embodiment
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the description of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark
Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, thus it is it is not intended that right
The limitation of the present invention.In addition, term " first ", " second " etc. are only used for description purpose, and it is not intended that instruction or hint phase
To importance or the implicit quantity for indicating indicated technical characteristic.Thus, the feature for defining " first ", " second " etc. can
To express or implicitly include one or more this feature.In the description of the present invention, unless otherwise indicated, " multiple "
It is meant that two or more.
In the description of the present invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
Below with reference to the accompanying drawings and the present invention will be described in detail in conjunction with the embodiments.
As shown in Figure 1, a kind of train power generation machine excitation chopper based on DSP, including the input of sample circuit, control signal
Circuit, dsp processor, PWM isolation circuits, power main circuit and power supply；The sample circuit and control signal input circuit
It is electrically connected with the input terminal of dsp processor, the output terminal of dsp processor is electrically connected with PWM isolation circuits, PWM isolation circuits
It is electrically connected with power main circuit；The power supply be respectively sample circuit, control signal input circuit, dsp processor and PWM every
Power from circuit.
The PWM isolation circuits include driving enhancing module and optical coupling isolation circuit, dsp processor, driving enhancing mould
Block and optical coupling isolation circuit are sequentially connected.
The driving enhancing module is 74HCT245D digital integrated electronic circuits.
The power main circuit includes IPM intelligent power module, three-phase alternating current source and the uncontrollable rectifier bridge of three-phase, IPM
Uncontrollable with three-phase rectifier bridge and optical coupling isolation circuit are connected intelligent power module respectively, and the uncontrollable rectifier bridge of three-phase intersects with three
Stream source connects.
The IPM intelligent power module, including two IGBT pipe, gate drive circuit and protection circuit, described the
One end of one IGBT pipes is connected with one end half-bridge of the 2nd IGBT pipes, the other end of the first IGBT, the other end of the 2nd IGBT point
Do not coupled with gate drive circuit, gate drive circuit is connected with protection circuit.
An Optical coupling resistance, optocoupler electricity are also associated between the control signal input circuit and dsp processor
Resistance is used for electrical isolation.
An A/D modular converters are coupled on the dsp processor, AD conversion module is connected with sample circuit respectively.
Modulate circuit is additionally provided between the A/D modular converters and sample circuit, the modulate circuit includes filtering
Circuit, amplifying circuit and amplitude limiter circuit, the filter circuit, amplifying circuit and amplitude limiter circuit are sequentially connected.
The amplitude limiter circuit includes double diode, and the output terminal connection of the double diode and amplifying circuit is described
Double diode be used to limit the amplitude of input voltage.
The sample circuit includes voltage sensor and current sensor.
Specific embodiment：The power section of the present invention is mainly PWM isolation circuits and power main circuit；Control section
Using DSP as core, along with sample circuit, signal input circuit；Power supply is controlled to need part in order to control and PWM drive circuit to supply
Electricity.
As shown in Fig. 2, the power main circuit is by 220V three-phase alternating-current powereds, rated excitation voltage 32V, rated excitation
Electric current 140A, maximum exciting current 160A.In view of DC-DC portion voltage no-load voltage ratios, three-phase commutation bridge electric current is smaller than excitation electricity
Stream, therefore select the uncontrollable rectifier bridge of IXYS company VUE130-06NO7 type three-phases, its 600V rated, rated current
130A.The IPM modules, two IGBT and its gate-drive and protection circuit of the connection of built-in half-bridge, each IGBT is instead simultaneously
Join a fly-wheel diode.In this excitation chopper, only second IGBT, first IGBT is controlled not to provide control voltage,
Lay up.Excitation chopper power main circuit is as shown in fig. 6, three-phase alternating current input conduct after uncontrollable rectification and filtering
Buck circuits high-pressure side dc bus, controls second IGBT duty cycle, obtains controllable DC voltage, connects Exciting Windings for Transverse Differential Protection.
In addition, the although built-in IGBT drivings of intelligent power module, but without the isolation circuit of input pwm signal.Such as Fig. 3 institutes
Show, in order to protect DSP to be disturbed from power device part, safeguards system stable operation need to be electric with power circuit portion by DSP
Isolation；In addition, the I/O outputs signal driving force of DSP is limited, it is not enough to directly drive photoelectric coupled circuit, so using
74HCT245D digital integrated electronic circuits strengthen signal driving force.
Access 15V control power supplys are needed outside excitation chopper, can be powered directly to intelligent power module, but control system is still
Need the 5V power supplys to artificial circuit part and digital circuits section power supply.5V digital powers are by 15V input voltages through isolated form
DC-DC power source chip VRB1205LD-15WR2 is depressured to obtain；5V analog powers are by 5V digital powers through EMI filter modules
Obtained after BNX022-01 filtering.
This excitation chopper is using TMS320F28335 DSP as control core, and the system control of completion is appointed, with others
Fixed DSP is compared, and the precision of the device is high, and cost is low, small power consumption, and performance is high, and peripheral hardware integrated level is high, data and program storage
Amount is big, and A/D conversions are more accurately quick etc..The dsp processor mainly includes minimum system core circuit design and periphery electricity
Road is designed, and wherein minimum system design mainly includes power circuit, reset circuit, clock circuit and JTAG emulation interface part.
As shown in Figure 4, it is contemplated that input digital signal frequency is relatively low, and the design is using inexpensive TLP185 common optical couplers
Electrical isolation is carried out to input signal signal and DSP.
As shown in figure 5, the accessible voltage range of A/D modular converters of F2833X series DSPs is 0~3V, but the system
The voltage range that middle voltage, current sensor export is 0~5V, therefore directly voltage cannot be connected on A/D input ports, otherwise
A/D sampling modules will be damaged.Analog input signal process circuit is as shown in Figure 10 all the way, and resistance is used to 0~5V inputting partial pressure
To 0~3V；Amplifier composition voltage follow formula output, for front voltage and sampled point to be well isolated from out；Diode is used
To limit the amplitude of input voltage, the Transient Suppression Diode with supper-fast response speed, and TVS pipe are selected.
As shown in fig. 6, excitation chopper can individually be powered for separate excitation system by three-phase alternating current；For self-excited system, rise
The stage is encouraged by storage battery power supply, oneself three-phase alternating-current powered is provided after synchronous generator set end voltage reaches certain level.Three-phase
Uncontrollable rectification and the power main circuit part that dc-dc is excitation chopper, which intersects storage battery or three
Stream power supply transforms to suitable DC voltage, i.e. excitation voltage.Double PI closed loops are excitation chopper control section, its input is same
Generator generator terminal reference voltage is walked, is exported as pwm signal, for controlling DC-DC converter.
In traditional excitation con-trol unit, the major loop of exciter control system generally adds three-phase bridge using exciting transformer
The mode of controlled rectification circuit, achievees the purpose that to control exciting current by controlling the Trigger Angle of thyristor in rectification circuit,
But the control circuit of silicon controlled excitation circuit is complicated with drive circuit, and response speed is slow.The present invention uses full-control type electric power
The bipolar thyristor of insulating electronic device grid (IGBT) as the chopped mode field circuit of switch switching frequency up to 20kHz, because
This uses the excitation system rapid dynamic response speed based on chop control, and dynamic stability performance is good, and excitation electricity can be better achieved
The quick regulation of stream.
In generator normal operation, excitation system should maintain generator voltage in given level.When load random wave
It is dynamic, as the fluctuation of load is, it is necessary to be adjusted exciting current, to maintain set end voltage in given level, and to ensure having
Certain degree of regulation.The design uses double closed-loop control system, and outer shroud is set end voltage ring, and inner ring is exciting current ring.
In excitation chopper start-up course, electric current loop plays a leading role, and voltage ring filling is equivalent to open loop, to ensure that set end voltage is being permitted
Perhaps rapid increase under maximum exciting current excitation；When synchronous generator reaches the operation of stable state set end voltage, Voltage loop exits
Saturation state, and electric current loop act at the same time, reduce the static difference of set end voltage as far as possible.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention god.
Claims (10)
- A kind of 1. train power generation machine excitation chopper based on DSP, it is characterised in that：Inputted including sample circuit, control signal Circuit, dsp processor, PWM isolation circuits, power main circuit and power supply；The sample circuit and control signal input circuit It is electrically connected with the input terminal of dsp processor, the output terminal of dsp processor is electrically connected with PWM isolation circuits, PWM isolation circuits It is electrically connected with power main circuit；The power supply be respectively sample circuit, control signal input circuit, dsp processor and PWM every From circuit supply and AC.
- A kind of 2. train power generation machine excitation chopper based on DSP according to claim 1, it is characterised in that：Described PWM isolation circuits include driving enhancing module and optical coupling isolation circuit, dsp processor, driving enhancing module and light-coupled isolation electricity Road is sequentially connected.
- A kind of 3. train power generation machine excitation chopper based on DSP according to claim 2, it is characterised in that：Described Driving enhancing module is 74HCT245D digital integrated electronic circuits.
- A kind of 4. train power generation machine excitation chopper based on DSP according to claim 1 or 2, it is characterised in that：It is described Power main circuit include IPM intelligent power module, three-phase alternating current source and the uncontrollable rectifier bridge of three-phase, IPM intelligent power module Uncontrollable with three-phase rectifier bridge and optical coupling isolation circuit are connected respectively, and the uncontrollable rectifier bridge of three-phase is connected with three-phase alternating current source.
- A kind of 5. train power generation machine excitation chopper based on DSP according to claim 4, it is characterised in that：Described IPM intelligent power module, including two IGBT pipes, gate drive circuit and protection circuit, one end of the first IGBT pipes It is connected with one end half-bridge of the 2nd IGBT pipes, the other end of the first IGBT, the other end of the 2nd IGBT are electric with gate-drive respectively Road couples, and gate drive circuit is connected with protection circuit.
- A kind of 6. train power generation machine excitation chopper based on DSP according to claim 1, it is characterised in that：Described An Optical coupling resistance is also associated between control signal input circuit and dsp processor, the Optical coupling resistance is used for electrical isolation.
- A kind of 7. train power generation machine excitation chopper based on DSP according to claim 1, it is characterised in that：Described An A/D converter is also associated between sample circuit and dsp processor.
- A kind of 8. train power generation machine excitation chopper based on DSP according to claim 1, it is characterised in that：Described Modulate circuit is also associated between A/D modular converters and sample circuit, the modulate circuit includes filter circuit, amplifying circuit And amplitude limiter circuit, the filter circuit, amplifying circuit and amplitude limiter circuit are sequentially connected.
- A kind of 9. train power generation machine excitation chopper based on DSP according to claim 1, it is characterised in that：Described Amplitude limiter circuit includes double diode, the output terminal connection of the double diode and amplifying circuit, and the double diode is used for Limit the amplitude of input voltage.
- A kind of 10. train power generation machine excitation chopper based on DSP according to claim 1, it is characterised in that：Described Sample circuit includes voltage sensor and current sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711339803.XA CN107919826A (en) | 2017-12-14 | 2017-12-14 | A kind of train power generation machine excitation chopper based on DSP |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711339803.XA CN107919826A (en) | 2017-12-14 | 2017-12-14 | A kind of train power generation machine excitation chopper based on DSP |
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| Publication Number | Publication Date |
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| CN107919826A true CN107919826A (en) | 2018-04-17 |
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| CN201711339803.XA Pending CN107919826A (en) | 2017-12-14 | 2017-12-14 | A kind of train power generation machine excitation chopper based on DSP |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040085051A1 (en) * | 2002-10-30 | 2004-05-06 | Kim Chan Ki | Static excitation system having capability of eliminating shaft vibrations of a generator and overvoltage when underexited |
| CN103746622A (en) * | 2014-01-23 | 2014-04-23 | 东北大学 | Single-tube IGBT (Insulated Gate Bipolar Translator)-based three-stage brushless generator power control device and power control method |
| CN103872971A (en) * | 2014-03-19 | 2014-06-18 | 北京工业大学 | Square wave combining excitation starter/ electric generator control method |
| CN106100333A (en) * | 2016-06-21 | 2016-11-09 | 国海峰 | High-power soft switch two-way DC DC converter circuit |
| CN208571967U (en) * | 2017-12-14 | 2019-03-01 | 天津电力机车有限公司 | A kind of intelligence control system of excitation chopper |
-
2017
- 2017-12-14 CN CN201711339803.XA patent/CN107919826A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040085051A1 (en) * | 2002-10-30 | 2004-05-06 | Kim Chan Ki | Static excitation system having capability of eliminating shaft vibrations of a generator and overvoltage when underexited |
| CN103746622A (en) * | 2014-01-23 | 2014-04-23 | 东北大学 | Single-tube IGBT (Insulated Gate Bipolar Translator)-based three-stage brushless generator power control device and power control method |
| CN103872971A (en) * | 2014-03-19 | 2014-06-18 | 北京工业大学 | Square wave combining excitation starter/ electric generator control method |
| CN106100333A (en) * | 2016-06-21 | 2016-11-09 | 国海峰 | High-power soft switch two-way DC DC converter circuit |
| CN208571967U (en) * | 2017-12-14 | 2019-03-01 | 天津电力机车有限公司 | A kind of intelligence control system of excitation chopper |
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