CN106712647A - High voltage variable frequency speed regulation system with on-line fault detection and bypass protection functions - Google Patents
High voltage variable frequency speed regulation system with on-line fault detection and bypass protection functions Download PDFInfo
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- CN106712647A CN106712647A CN201710133264.8A CN201710133264A CN106712647A CN 106712647 A CN106712647 A CN 106712647A CN 201710133264 A CN201710133264 A CN 201710133264A CN 106712647 A CN106712647 A CN 106712647A
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- circuit
- bypass protection
- igbt
- phase
- quick detection
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
- H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
- H02P27/14—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation with three or more levels of 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
- H02P2207/00—Indexing scheme relating to controlling arrangements characterised by the type of motor
- H02P2207/01—Asynchronous machines
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a high voltage variable frequency speed regulation system with on-line fault detection and bypass protection functions. The high voltage variable frequency speed regulation system with on-line fault detection and bypass protection functions comprises a phase-shifting transformer, a frequency converter and a control unit, wherein the frequency converter comprises 27 identical power units, every 9 power units are sequentially connected in series to form one phase, and three phases are connected in a star shape to be connected with an asynchronous motor; the power unit comprises a rectifier circuit, an inverter circuit and a bypass protection circuit connected sequentially, and the rectifying circuit is a rectifier bridge circuit formed by a plurality of diodes and a capacitor; the inverter circuit consists of a plurality identical IGBT (insulated gate bipolar transitor) units, and the bypass protection circuit is a circuit consisting of a plurality of diodes, a bidirectional thyristor and a trigger circuit; and the IGBT unit comprises a drive circuit, an IGBT unit and a fast detection circuit. The high voltage variable frequency speed regulation system with on-line fault detection and bypass protection functions provided by the invention adopts a modular design, and has the advantages of good interchangeability, simple maintenance, low noise, small harmonic content, no torque ripple of the motor, and on-line rapid fault detection and bypass protection functions.
Description
Technical field
The invention belongs to High-voltage Frequency Conversion Technology field, and in particular to one kind has online failure quick detection and bypass protection
High-voltage variable-frequency and variable-speed system.
Background technology
Promotion and China's high-tension motor capacity rapid growth with national energy-saving emission reduction policy, high voltage converter market
The fast-developing phase is welcome.Frequency converter is installed between power supply and motor, is automatically adjusted by changing frequency and output voltage
The speed of service of motor, is current so as to reach the purpose of the operational efficiency and using electricity wisely that improve user's electric motor system
Most preferable, most promising motor energy-saving device.High voltage converter belongs to great electrical equipment, is the high, precision and frontier in frequency converter
Product, is mainly used in the improvement of the driving of key equipment, the energy-saving run of high-voltage motor and processing performance, is widely used in electricity
Power, metallurgy, petrochemical industry, locomotive traction etc..
The characteristics of variation of topological structure and control method is high voltage converter；In numerous topological structures, such as
Friendship-ac frequency converter, GTO current source type variable frequencies device, three-level voltage source type frequency converter, the electricity of power device series connection direct voltage two
All there is the deficiencies such as input side harmonic wave is big, output harmonic wave big and output voltage rate of change is high in level voltage source type frequency converter etc..With
These topological structure inverters are compared, and cells cascaded multilevel inverter has that harmonic wave is small, common-mode voltage is small, voltage change ratio
Small, electromagnetic interference is small, switching frequency is low, system effectiveness is high, be adapted to mesohigh large-capacity transducer application the features such as.Therefore, open
Hair cells cascaded multilevel high-voltage AC motor frequency conversion speed-adjusting system and popularization and application, reducing per unit area yield energy consumption to China's industry has
Important meaning, be also the applicant be devoted to always research direction.
The content of the invention
Goal of the invention：The invention aims to solve deficiency of the prior art, there is provided one kind is set using modularization
Meter, interchangeability is good, easy to maintenance, and noise is low, and harmonic content is small, will not cause the torque pulsation of motor, and faulty online fast
Speed detection and the high-voltage variable-frequency and variable-speed system with online failure quick detection and bypass protection of bypass protection function.
Technical scheme：A kind of high-voltage frequency conversion and speed-adjusting with online failure quick detection and bypass protection of the present invention
System, the system is arranged between three phase mains and asynchronous machine, and the high-voltage variable-frequency and variable-speed system includes phase-shifting transformer, frequency conversion
Device and control unit, wherein：
Frequency converter, including 3n identical power cell, n >=2 and n are integer；It is followed in series to form per n power cell
One phase, three-phase it is star-like be connected after connect the asynchronous machine；The power cell includes the rectification circuit, the inversion electricity that are sequentially connected
Road and bypass protection circuit, the rectification circuit are the rectifier circuits being made up of multiple diodes and electric capacity, the inversion electricity
Road is the inverter circuit being made up of multiple identical IGBT units, and the bypass protection circuit is by multiple diodes, two-way
The circuit that IGCT and triggers circuit are constituted, the IGBT units include drive circuit, IGBT units and quick detection circuit；
Phase-shifting transformer, including primary side winding and 3n vice-side winding, primary side winding connect the three phase mains, and each is secondary
Side winding connects a power cell according to extend-triangle connection；
Control unit, including two CSTR controller, PLC and man-machine interface, the two CSTR controller and each power
Unit is electrically connected, and the man-machine interface is electrically connected with two CSTR controller, PLC respectively, the two CSTR controller
Also electrically connected with the PLC.
Further, the n is 9.
Further, the triggers circuit is connected with the bidirectional thyristor, and the triggers circuit uses MOC3061 moulds
Block, MOC3061 modules are photoelectric coupled device, and its input uses Phototube Coupling with output, realizes DSP signals to bidirectional thyristor
Triggering control, the output signal GPIOF0 of two CSTR controller is connected with the defeated people of MOC3061 modules, MOC3061 modules it is defeated
Go out and be connected with the input of bidirectional thyristor.
Further, the drive circuit is connected with the base stage of the IGBT units, the colelctor electrode of the IGBT units with
Quick detection circuit is provided between emitter stage.
Further, the drive circuit uses Si8286 modules, drive control of the DSP signals to IGBT is realized, in it
Using coupling isolation is held, transmission medium is SiO2 in portion, and high-speed digital signal is transmitted with capacitive form, and speed reaches 150Mbps, two CSTR
Output signal GPIOA mouthfuls of controller is connected with the defeated people of Si8286 modules, Si8286 modules output and IGBT input phase
Even.
Further, the quick detection circuit includes diode VD1, diode VD2, resistance R1, resistance R2 and optocoupler
Clutch part OC, the diode in the LMDS Light Coupled Device is in parallel with the diode VD2 after being connected with resistance R1, diode VD1
Connection, the colelctor electrode of the phototriode in the LMDS Light Coupled Device is connected with resistance R2.
Beneficial effect：The present invention uses modularized design, and interchangeability is good, easy to maintenance, and noise is low, and harmonic content is small, no
The torque pulsation of motor, and faulty on-line quick detection and bypass protection function can be caused.
Brief description of the drawings
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is single power cell structure schematic diagram of the invention；
Fig. 3 is single IGBT cellular construction schematic diagrams of the invention.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
A kind of high-voltage variable-frequency and variable-speed system with online failure quick detection and bypass protection as shown in Figure 1, this is
System is arranged between three phase mains and asynchronous machine, and the high-voltage variable-frequency and variable-speed system includes phase-shifting transformer, frequency converter and control
Unit processed, wherein：
Frequency converter, including 27 identical power cells（A1-A9, B1-B9, C1-C9）；Every 9 power cells are sequentially connected in series structure
Cheng Yixiang, three-phase it is star-like be connected after connect the asynchronous machine.
As shown in Fig. 2 the power cell includes the rectification circuit, inverter circuit and the bypass protection circuit that are sequentially connected,
The rectification circuit is the rectifier circuit being made up of six diode D1-D6 and electric capacity C, and the inverter circuit is by four phases
The inverter circuit that same IGBT units are constituted, the bypass protection circuit is by four diode D7-D10, bidirectional thyristors
The circuit that KS and triggers circuit are constituted.
The triggers circuit is connected with the bidirectional thyristor, and the triggers circuit uses MOC3061 modules, MOC3061
Module is photoelectric coupled device, and its input uses Phototube Coupling with output.Realize triggering control of the DSP signals to bidirectional thyristor
System.The output signal GPIOF0 of DSP is connected with the defeated people of MOC3061 modules, output and the bidirectional thyristor of MOC3061 modules
Input is connected.Further, the drive circuit is connected with the base stage of the IGBT units, the colelctor electrode of the IGBT units with
Quick detection circuit is provided between emitter stage.
As shown in figure 3, the IGBT units include drive circuit, IGBT units and quick detection circuit；It is described to drive electricity
Road is connected with the base stage of the IGBT units, and quick detection circuit is provided between the colelctor electrode and emitter stage of the IGBT units.
The quick detection circuit includes diode VD1 diode VD2, resistance R1, resistance R2 and LMDS Light Coupled Device OC, the optical coupling
Diode in device is connected in parallel after being connected with resistance R1, diode VD1 with the diode VD2, the LMDS Light Coupled Device
The colelctor electrode of interior phototriode is connected with resistance R2.
The drive circuit uses Si8286 modules, realizes drive control of the DSP signals to IGBT.Here select
Silicon Labs companies intelligence gate-drive Si8286 modules, with spies such as high withstand voltage, low conduction impedance, senior engineer's working frequencies
Levy.It is internal using coupling isolation is held, and transmission medium is SiO2, and high-speed digital signal is transmitted with capacitive form, and speed is reachable
150Mbps.Si8286 modules, built-in IGBT detections and defencive function.The output signal of DSP（GPIOA mouthfuls）With Si8286 modules
Defeated people be connected, the output of Si8286 modules is connected with the input of IGBT.
Phase-shifting transformer, including primary side winding and 27 vice-side windings, primary side winding connect the three phase mains, often
Individual vice-side winding connects a power cell according to extend-triangle connection.
Control unit, including two CSTR controller, PLC and man-machine interface, the two CSTR controller and each
Power cell is electrically connected, and the man-machine interface is electrically connected with two CSTR controller, PLC respectively, the two CSTR control
Device processed is also electrically connected with the PLC.
High-voltage variable-frequency and variable-speed system of the invention with high-speed dsp as control core, using space voltage vector control technology,
Power unit cascade multilevel converter；System uses New IGBT power device, the control of totally digitilized microcomputer, directly export 3KV,
The high voltage power supply of 6KV, 10KV, is adapted to various general three-phase alternating-current motors.
Many level carrier phase shift technologies that the inverter output of power cell is controlled using SPWM, the power cell of same phase
Certain electrical angle that is mutually staggered between the fundamental voltage of identical amplitude and phase, but the carrier wave of series connection each unit is exported, is realized
Many level PWMs, output voltage closely sine wave, each level step only has unit DC bus-bar voltage size, output wave
Form quality amount is good, and output voltage relative harmonic content is less than 1.8%, the additional heating of the motor caused in the absence of harmonic wave and torque pulsation,
The problems such as noise, output dv/dt, common-mode voltage, it is not necessary to plus output filter, it is possible to use common asynchronous machine.
Frequency converter per being composed in series using low pressure and low power unit, every 9 power cells of phase, three-phase totally 27 it is identical
Power cell.Using modularized design, interchangeability is good, easy to maintenance, and noise is low, and harmonic content is small, will not cause motor
Torque pulsation, does not have particular/special requirement to motor.
Power cell is the important core part of high voltage converter.It is completely the same in each power cell structure, can be mutual
Change（Shown in power cell schematic diagram 2）, system is basic AC-DC-AC single-phase inversion circuit, and power cell uses three-phase alternating current
Input, diode three phase full bridge rectification, the SPWM voltages of output single-phase after IGBT inversions, and faulty online quick inspection
Survey and bypass protection function.
The ceiling voltage that IGBT device is born in power cell is DC bus-bar voltage in unit, can directly use low pressure
Power device, device need not connect, in the absence of the voltage-sharing that devices in series causes, and the low pressure used in power cell
IGBT/1700V power models, drive circuit is simple, and technology maturation reliability, device is operated in low-pressure state, is not susceptible to failure.
Operation principle of the invention is as follows：
Three-phase alternating voltage turns into DC voltage through D1 ~ D6 rectifier bridges, then turns into after the inversion of IGBT 1 ~ IGBT of unit units 4
SPWM single-phase AC voltages, the frequency of its SPWM signal has the drive circuit of IGBT units（Fig. 3）Triggering frequency determine.Power
Cell failure occurs mainly in the IGBT cell failures of Converting Unit, once IGBT cell failures（IGBT device is bad or drives electricity
Road failure）Inversion cannot be realized.
Power cell fault on-line quick detection method is as follows：
According to SPWM waveform requirements, the trigger signal of IGBT drive circuit is given, IGBT is turned on immediately, and is low tube voltage drop
（The forward conduction voltage of IGBT）, DSP sending drive signal（GPTOA mouthfuls）Meanwhile, by DSP inputs（GPTOB mouthfuls）Inspection
Survey corresponding IGBT whether to turn on, if GPTOB mouthfuls is high level, belong to normal non-fault.Inversion output single-phase alternating voltage, with it
The single-phase AC voltage of his serial unit is superimposed to form high pressure SPWM waveform voltages.If IGBT units are out of order, give
The trigger signal of IGBT drive circuit, IGBT would not be turned on, and the tube voltage drop of IGBT still maintains high voltage, and IGBT is sent in DSP
During drive circuit trigger signal, the signal that GPTOB mouthfuls of on-line real-time measuremen circuit is now low electricity because optocoupler turns on GPTOB mouthfuls
It is flat, belong to failure.Once IGBT cell failures, real-time online detection is quick to be found.As long as having an IGBT cell failure, power list
Unit cannot just export SPWM ripples.
The guard method of bypass circuit is as follows：
On the one hand no longer to 4 IGBT Dan Wufa trigger signals；Meanwhile, bidirectional thyristor KS is triggered at once so that series connection with it
The superior and the subordinate's power cell SPWM voltages, short circuit can be herein presented and pass through.In order to be able to asynchronous machine three-phase voltage symmetrically works,
Simultaneously close off with the another two-phase power cell of group（Also it is processed as bypass）.This failure, quick detection is processed with bypass, system
Do not shut down.
The above, is only presently preferred embodiments of the present invention, and any formal limitation is not made to the present invention, though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any to be familiar with this professional technology people
Member, without departing from the scope of the present invention, when making a little change or modification using the technology contents of the disclosure above
It is the Equivalent embodiments of equivalent variations, as long as being the content without departing from technical solution of the present invention, according to technical spirit of the invention
Any simple modification, equivalent variations and the modification made to above example, still fall within the range of technical solution of the present invention.
Claims (6)
1. a kind of high-voltage variable-frequency and variable-speed system with online failure quick detection and bypass protection, the system is arranged on three-phase electricity
Between source and asynchronous machine, it is characterised in that：The high-voltage variable-frequency and variable-speed system includes that phase-shifting transformer, frequency converter and control are single
Unit, wherein：
Frequency converter, including 3n identical power cell, n >=2 and n are integer；It is followed in series to form per n power cell
One phase, three-phase it is star-like be connected after connect the asynchronous machine；The power cell includes the rectification circuit, the inversion electricity that are sequentially connected
Road and bypass protection circuit, the rectification circuit are the rectifier circuits being made up of multiple diodes and electric capacity, the inversion electricity
Road is the inverter circuit being made up of multiple identical IGBT units, and the bypass protection circuit is by multiple diodes, two-way
The circuit that IGCT and triggers circuit are constituted, the IGBT units include drive circuit, IGBT units and quick detection circuit；
Phase-shifting transformer, including primary side winding and 3n vice-side winding, primary side winding connect the three phase mains, and each is secondary
Side winding connects a power cell according to extend-triangle connection；
Control unit, including two CSTR controller, PLC and man-machine interface, the two CSTR controller and each power
Unit is electrically connected, and the man-machine interface is electrically connected with two CSTR controller, PLC respectively, the two CSTR controller
Also electrically connected with the PLC.
2. a kind of high-voltage frequency conversion and speed-adjusting system with online failure quick detection and bypass protection according to claim 1
System, it is characterised in that：The n is 9.
3. a kind of high-voltage frequency conversion and speed-adjusting system with online failure quick detection and bypass protection according to claim 1
System, it is characterised in that：The triggers circuit is connected with the bidirectional thyristor, and the triggers circuit uses MOC3061 modules,
MOC3061 modules are photoelectric coupled device, and its input uses Phototube Coupling with output, realizes DSP signals to bidirectional thyristor
Triggering control, the output signal GPIOF0 of two CSTR controller is connected with the defeated people of MOC3061 modules, the output of MOC3061 modules
It is connected with the input of bidirectional thyristor.
4. a kind of high-voltage frequency conversion and speed-adjusting system with online failure quick detection and bypass protection according to claim 1
System, it is characterised in that：The drive circuit is connected with the grid of the IGBT units, colelctor electrode and the transmitting of the IGBT units
Quick detection circuit is provided between pole.
5. a kind of high-voltage frequency conversion and speed-adjusting with online failure quick detection and bypass protection according to claim 1 or 4
System, it is characterised in that：The drive circuit uses Si8286 modules, drive control of the DSP signals to IGBT is realized, inside it
Isolated using coupling is held, transmission medium is SiO2, high-speed digital signal is transmitted with capacitive form, speed reaches 150Mbps, two CSTR control
Output signal GPIOA mouthfuls of device processed is connected with the defeated people of Si8286 modules, and the output of Si8286 modules is connected with the input of IGBT.
6. a kind of high-voltage frequency conversion and speed-adjusting with online failure quick detection and bypass protection according to claim 1 or 4
System, it is characterised in that：The quick detection circuit includes diode VD1, diode VD2, resistance R1, resistance R2 and optical coupling
Device OC, the diode in the LMDS Light Coupled Device is in parallel with the diode VD2 after being connected with resistance R1, diode VD1 to be connected
Connect, the colelctor electrode of the phototriode in the LMDS Light Coupled Device is connected with resistance R2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710133264.8A CN106712647A (en) | 2017-03-08 | 2017-03-08 | High voltage variable frequency speed regulation system with on-line fault detection and bypass protection functions |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710133264.8A CN106712647A (en) | 2017-03-08 | 2017-03-08 | High voltage variable frequency speed regulation system with on-line fault detection and bypass protection functions |
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| CN201710133264.8A Pending CN106712647A (en) | 2017-03-08 | 2017-03-08 | High voltage variable frequency speed regulation system with on-line fault detection and bypass protection functions |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112731114A (en) * | 2020-12-30 | 2021-04-30 | 浙江华晟金属制品有限公司 | Instrument for quickly measuring thyristor and capacitor in series inverter circuit |
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| CN103107689A (en) * | 2011-11-11 | 2013-05-15 | 台达电子企业管理（上海）有限公司 | Cascading transducer and power unit and bypass module of power unit |
| CN103795323A (en) * | 2012-11-02 | 2014-05-14 | 上海电气集团股份有限公司 | High-voltage frequency-conversion speed-regulation system and control method thereof |
| CN205193194U (en) * | 2015-11-05 | 2016-04-27 | 许继电源有限公司 | Novel electronic switch short circuit detects device |
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| US20090167229A1 (en) * | 2007-12-31 | 2009-07-02 | Brunner Jeffrey A | AC Motor Bypass With Fault Annunication, Serial Communication And Fault Tolerant Coil Control |
| CN201226505Y (en) * | 2008-04-30 | 2009-04-22 | 黄邦洪 | High voltage blower/high voltage fan electricity-saving device |
| CN103107689A (en) * | 2011-11-11 | 2013-05-15 | 台达电子企业管理（上海）有限公司 | Cascading transducer and power unit and bypass module of power unit |
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Application publication date: 20170524 |