CN107069670A - A kind of H bridges change of current module protection circuit and three-phase H bridge cascade converters - Google Patents
A kind of H bridges change of current module protection circuit and three-phase H bridge cascade converters Download PDFInfo
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- CN107069670A CN107069670A CN201710190497.1A CN201710190497A CN107069670A CN 107069670 A CN107069670 A CN 107069670A CN 201710190497 A CN201710190497 A CN 201710190497A CN 107069670 A CN107069670 A CN 107069670A
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- 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
- H02H7/122—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 inverters, i.e. dc/ac converters
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Abstract
The invention provides a kind of H bridges change of current module protection circuit, its fault detection module, for detecting the running status of H bridge change of current modules, and the driving instruction issued according to top level control system and/or protection instruction control H bridge change of current modules；Its failure feedback module, is encoded for collecting malfunction to fault detection module, and coding information is sent to upper strata control system, and top level control system determines protection instruction according to the coding information；Coding information is the coding information that 24 bits are constituted, 1st~8 bit is the numbering of the H bridge change of current modules broken down, 9th~16 bit is the numbering of the power electronic devices broken down in H bridge change of current modules, and the 17th~24 bit is the numbering of fault type.Compared with prior art, a kind of H bridges change of current module protection circuit that the present invention is provided, is easy to top level control system accurately to obtain the fault type and abort situation of H bridge change of current modules, and then determine protection instruction.
Description
Technical field
The present invention relates to electric and electronic technical field, and in particular to a kind of H bridges change of current module protection circuit and three-phase H bridge level
Join current transformer.
Background technology
Each phase bridge arm of three-phase H bridge cascade converters can include the H bridge low pressure and low power modules of multiple cascades, by multiple
Low pressure and low power block coupled in series exports high-power.The cascade structure of multiple H bridges submodules can be to influence three-phase H bridges cascade unsteady flow
The safety and reliability of device, for example, often leading to whole bridge arm or even whole unsteady flow when a H bridge submodule breaks down
Device is out of service, and then causes the concussion of regional power system.At present, mainly by being set on three-phase H bridge cascade converters
Protection circuit, is protected and status monitoring to each H bridges submodule.But, conventional protection circuit also has following defects：
(1) defencive function is single, it is impossible to realize and the precise positioning of failure is handled with fault severity level classification.
(2) fault information reporting mechanism is simple, and the top level control system for being unfavorable for three-phase H bridge cascade converters is entered to failure
Row positioning and analysis.
(3) power supply mode is single, and when power supply occurs abnormal, protection circuit tends not to normal work.
The content of the invention
In order to meet the defect for overcoming prior art, the invention provides a kind of H bridges change of current module protection circuit and three-phase H
Bridge cascade converter.
In a first aspect, a kind of technical scheme of H bridges change of current module protection circuit is in the present invention：
The protection circuit includes：
Fault detection module, the running status for detecting the H bridges change of current module, and according under top level control system
The driving instruction and/or protection instruction control H bridge change of current modules of hair；
Failure feedback module, is encoded for collecting malfunction to the fault detection module, and will coding
Information is sent to the top level control system, and the top level control system determines the protection instruction according to the coding information；
Wherein, the coding information is the coding information that 24 bits are constituted, and the 1st~8 bit is generation
The numbering of the H bridge change of current modules of failure, the 9th~16 bit is the power electronics device broken down in H bridge change of current modules
The numbering of part, the 17th~24 bit is the numbering of fault type.
A kind of technical scheme of three-phase H bridge cascade converters is in second aspect, the present invention：
Three-phase H bridges cascade converter includes three-phase bridge arm, and each phase bridge arm includes the H bridge change of current moulds of multiple cascades
Block；The three-phase H bridges cascade converter includes multiple H bridge changes of current module protection electricity as described in claim any one of 1-10
Road.
Compared with immediate prior art, the beneficial effects of the invention are as follows：
1st, a kind of H bridges change of current module protection circuit that the present invention is provided, failure feedback module is encoded to malfunction,
And send coding information to upper strata control system, top level control system determines protection instruction according to the coding information；The coding
Information contains the numbering of the numbering, the numbering of power electronic devices and fault type of the H bridge change of current modules broken down, is easy to
Top level control system accurately obtains the fault type and abort situation of H bridge change of current modules, and then determines protection instruction.
2nd, a kind of three-phase H bridge cascade converters that the present invention is provided, can be to three-phase using H bridge change of current module protection circuits
The trouble point of H bridge cascade converters carries out precise positioning, improves the troubleshooting efficiency of three-phase H bridge cascade converters.
Brief description of the drawings
Fig. 1：A kind of H bridges change of current module protection circuit schematic diagram in the embodiment of the present invention；
Fig. 2：Another H bridges change of current module protection circuit schematic diagram in the embodiment of the present invention；
Wherein, 1：Top level control system；2：Fault detection module；3：Failure feedback module；4：H bridge change of current modules.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely illustrated, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Separately below with reference to accompanying drawing, a kind of H bridges change of current module protection circuit provided in an embodiment of the present invention is illustrated.
Fig. 1 is a kind of H bridges change of current module protection circuit schematic diagram in the embodiment of the present invention, as illustrated, H in the present embodiment
Bridge change of current module protection circuit includes fault detection module 2 and failure feedback module 3, and fault detection module 2 is controlled with upper strata respectively
System 1 processed and H bridge changes of current module 4 are connected, and failure feedback module 3 is connected with top level control system 1, wherein, top level control system 1
For for setting the classical control system that H bridge changes of current module drive is instructed and protection is instructed.
Fault detection module 2 is used for the running status for detecting H bridge changes of current module 4, and is issued according to top level control system 1
Driving instruction and/or protection instruction control H bridge changes of current module 4.Wherein, the running status of H bridges change of current module 4 includes normal fortune
Row state and malfunction.Driving instruction exports the driving instruction of default desired signal for driving H bridge changes of current module 4, and protection refers to
Make and being detected for top level control system 1 after H bridge change of current modules break down, it is true in order to eliminate error protection H bridge change of current modules
Fixed protection instruction.
Failure feedback module 3 is used to collect malfunction to fault detection module 2 and encode, and by coding information
Send to 1 top level control system, top level control system 1 determines protection instruction according to the coding information.Wherein, coding information is 24
The coding information that bit is constituted, the 1st~8 bit is the numbering of the H bridge change of current modules broken down, the 9th~
16 bits are the numbering of the power electronic devices broken down in H bridge change of current modules, and the 17th~24 bit is
The numbering of fault type.Control system 1, according to above-mentioned coding information, can accurately obtain H bridge change of current moulds to the present embodiment at the middle and upper levels
The fault type and abort situation of block, and then determine protection instruction.
Further, fault detection module can include instruction process unit, the first detection unit and the in the present embodiment
Two detection units, be specially：
1st, instruction process unit
Instruction process unit is connected by optical fiber all the way with top level control system 1, receives driving instruction and/or protection refers to
Order；And each power electronic devices by multi-channel optical fibre respectively with H bridge changes of current module 4 is connected, passed to each power electronic devices
Driving instruction and/or protection instruction after transmission of data conversion.Meanwhile, one is connected respectively between each road optical fiber and each power electronic devices
Individual photoisolator, and each power electronic devices connects an insulating power supply respectively.
The driving instruction and/or protection instruction that instruction process unit is issued to top level control system 1 in the present embodiment are carried out
Data conversion, and the instruction after data turn is sent to H bridge change of current modules.I.e. instruction process unit first by driving instruction and/
Or protection instruction is converted to electric signal by optical signal, and optical signal is then converted electrical signals to again and is sent to H bridge change of current modules.Adopt
The electromagnetic interference of high pressure, high-power environment to protection circuit can be reduced by transmitting driving instruction and/or protection instruction with optical fiber, together
When also allow for master controller to protection circuit carry out far distance controlled.Using driving electricity of the insulating power supply as power electronic devices
Source, can improve the antijamming capability of protection circuit, while each power electronic devices is individually powered, prevent a power electronics
Device brings disaster to other power electronic devices because being caused by electrion or other reasonses after damaging.
2nd, the first detection unit
First detection unit is connected with each power electronic devices respectively by multi-channel optical fibre, gathers each actual driving pulse；
Wherein, a photoisolator is connected between each road optical fiber and each power electronic devices respectively.The first detection is single in the present embodiment
Member is used to gather each actual driving pulse that H bridge changes of current module 4 is received, and according to actual driving pulse and top level control system
The comparative result of 1 driving instruction issued judges whether the drive circuit of H bridge changes of current module 4 breaks down：If actual driving arteries and veins
Punching is consistent with driving instruction, and drive circuit does not break down, occurs event if actual driving pulse and driving instruction are inconsistent
Barrier.High pressure, high-power environment can be reduced and the electromagnetism of protection circuit is done by transmitting driving instruction and/or protection instruction using optical fiber
Disturb, while also allow for master controller carries out far distance controlled to protection circuit.
3rd, the second detection unit
Second detection unit is connected with each measuring unit respectively by multi-channel optical fibre, receives the number of each measuring unit collection
According to；Wherein, measuring unit is the voltage and/or electric current and/or temperature for detecting each power electronic devices in H bridge changes of current module 4
The measuring unit of degree, connects photoisolator between each road optical fiber and each measuring unit, and each measuring unit connects one respectively
Insulating power supply.
The second detection unit is used for whether judging power electronic devices according to the data that measuring unit is gathered in the present embodiment
Generation overvoltage, excessively stream and overheating fault, the second detection unit can by comparison voltage and its threshold value, electric current and its threshold value, and
Temperature and its threshold value, and judge whether occur overvoltage, excessively stream and overheating fault according to comparative result.Drive finger is transmitted using optical fiber
Order and/or protection instruction can reduce the electromagnetic interference of high pressure, high-power environment to protection circuit, while also allowing for master controller
Far distance controlled is carried out to protection circuit.Using driving power supply of the insulating power supply as power electronic devices, protection can be improved
The antijamming capability of circuit.
Protection circuit can also include following structures in the preferred embodiment that the present invention is provided, and be specially：
Protection circuit also includes fault processing module in the present embodiment, and the fault processing module is used for according to fault detect mould
Block 2 collects malfunction and sentences the fault level that H bridge changes of current module 4 breaks down, and is handled according to different preset strategies
The failure of different faults grade, be specially：
When failure is generic failure, fault processing module should according to the protection instruction processing that top level control system 1 is issued
Failure.Wherein, protection instruction can be the dutycycle or block driving pulse of reduction driving pulse.
When failure is catastrophe failure, fault processing module quickly blocks each power electronic devices in H bridge changes of current module 4
Driving pulse.Wherein, H bridges change of current module failure degree caused by catastrophe failure is more than H bridges change of current module caused by generic failure
Generic failure can include the overpressure value of power electronic devices in H bridge change of current modules less than specified in fault degree, the present embodiment
The 20% of voltage, the overcurrent value of power electronic devices is less than the 20% of rated current, and the temperature of power electronic devices is more than first
Limit value.The overpressure value that catastrophe failure can include power electronic devices is more than the 20% of rated voltage, the mistake of power electronic devices
Flow valuve is more than the 20% of rated current, and the temperature of power electronic devices is more than the second limit value, and the first limit value is less than the second limit value.
By carrying out classification processing to failure in the present embodiment, protective efficacy and the troubleshooting of protection circuit can be improved
Reliability.
Further, fault detection module, failure feedback module and fault processing module are arranged at again in the present embodiment
In miscellaneous programmable logic controller (PLC) CPLD.
Protection circuit can also include following structures in another preferred embodiment that the present invention is provided, and be specially：
Protection circuit also includes the power module for being used to power to it in the present embodiment, and the power module includes in parallel open
Powered-down source and battery；Wherein, battery is powered after Switching Power Supply breaks down to protection circuit.Using switch in the present embodiment
Power supply and battery dual power supply circuit, can improve the reliability that protection circuit is powered.
Further, power module also includes a diode, the anode and Switching Power Supply of the diode in the present embodiment
Connection, negative electrode is connected with battery.By setting a diode between Switching Power Supply and battery, it can prevent in Switching Power Supply
After failure, the supply current of battery is back to Switching Power Supply.
Further, power module also includes being used for the switch electricity whether monitoring switch power supply breaks down in the present embodiment
Source monitoring unit, the Switching Power Supply monitoring unit includes the first divider resistance and first voltage comparator.
Wherein, one end of the first divider resistance is connected with Switching Power Supply, other end ground connection.One of first voltage comparator
Input gathers the terminal voltage of the first divider resistance, and another input gathers the first reference voltage, output end and fault detect
Module 2 is connected.Fault detection module 2 judges whether Switching Power Supply occurs event according to the difference of terminal voltage and the first reference voltage
Barrier：Switching Power Supply is turned off if breaking down and controls battery to be powered to protection circuit.
Protection circuit can also include following structures in another preferred embodiment that the present invention is provided, and be specially：
Protection circuit also includes display module in the present embodiment, and display module is connected with fault detection module, including multiple
Indicator lamp.Display module is by changing the bright light color or light on and off state of each indicator lamp, display H bridge change of current modules and/or protection
Each preset operating state of circuit.Preset operating state includes Switching Power Supply abnormal operating condition, battery abnormal operating condition, the
One over-pressed running status, the second over-pressed running status, the first excessively stream running status, the second excessively stream running status, temperature anomaly fortune
Row state, driving power supply electric voltage exception running status and driving power supply current anomaly running status.
Wherein, Switching Power Supply abnormal operating condition refers to that the Switching Power Supply of power module in above-described embodiment is transported extremely
OK.
Battery abnormal operating condition refers to the battery misoperation of power module in above-described embodiment.
First over-pressed running status refers to that the overpressure value of power electronic devices in H bridge change of current modules is less than rated voltage
20%.
Second over-pressed running status refers to that the overpressure value of power electronic devices in H bridge change of current modules is more than rated voltage
20%.
First excessively stream running status refers to that the overcurrent value of power electronic devices in H bridge change of current modules is less than rated current
20%.
Second excessively stream running status refers to that the overcurrent value of power electronic devices in H bridge change of current modules is more than rated current
20%.
Temperature anomaly running status refers to that the temperature of power electronic devices in H bridge change of current modules is too high.
Driving power supply electric voltage exception running status refers in above-described embodiment power electronic devices in H bridges change of current module
Insulating power supply is under-voltage.
Driving power supply current anomaly running status refers in above-described embodiment power electronic devices in H bridges change of current module
Insulating power supply undercurrent.
Present invention also offers a kind of three-phase H bridge cascade converters, and provide specific embodiment.
Three-phase H bridges cascade converter includes three-phase bridge arm in the present embodiment, and each phase bridge arm H bridges including multiple cascades are changed
Flow module and multiple H bridges change of current module protection circuits, and a pair of each H bridges change of current module and each H bridges change of current module protection circuit 1
Should, it is respectively used to protect each H bridges change of current module.
The trouble point of three-phase H bridge cascade converters can be carried out using H bridge changes of current module protection circuit in the present embodiment
Precise positioning, improves the troubleshooting efficiency of three-phase H bridge cascade converters.
It should be noted that the present invention will be described rather than limits the invention for above-described embodiment, and ability
Field technique personnel can design alternative embodiment without departing from the scope of the appended claims.In the claims,
Any reference symbol between bracket should not be configured to limitations on claims.Word " comprising " is not excluded the presence of not
Element or step listed in the claims.Word "a" or "an" before element does not exclude the presence of multiple such
Element.The present invention can be by means of including the hardware of some different elements and being realized by means of properly programmed PC.
If in the unit claim for listing equipment for drying, several in these devices can be come specific by same hardware branch
Embody.The use of word first, second, and third does not indicate that any order.These words can be construed to title.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (11)
1. a kind of H bridges change of current module protection circuit, it is characterised in that the protection circuit includes：
Fault detection module, for detecting the running status of the H bridges change of current module, and issued according to top level control system
Driving instruction and/or protection instruction control H bridge change of current modules；
Failure feedback module, believes for being encoded to the malfunction that the fault detection module is collected, and by coding
Breath is sent to the top level control system, and the top level control system determines the protection instruction according to the coding information；
Wherein, the coding information is the coding information that 24 bits are constituted, and the 1st~8 bit is to break down
H bridge change of current modules numbering, the 9th~16 bit is the power electronic devices broken down in H bridge change of current modules
Numbering, the 17th~24 bit is the numbering of fault type.
2. a kind of H bridges change of current module protection circuit as claimed in claim 1, it is characterised in that the protection circuit also includes
Voltage and/or the measuring unit of electric current and/or temperature for detecting each power electronic devices in the H bridges change of current module；Institute
Stating fault detection module includes instruction process unit, the first detection unit and the second detection unit；
The instruction process unit, for carrying out data conversion to the driving instruction and/or protection instruction, and by the data
Instruction after turning is sent to the H bridges change of current module；
First detection unit, for gathering each actual driving pulse that the H bridges change of current module is received, and according to described
The comparative result for the driving instruction that actual driving pulse is sent with top level control system judges the driving electricity of the H bridges change of current module
Whether break down on road；
Second detection unit, the data for being gathered according to the measuring unit judge whether the power electronic devices is sent out
Raw overvoltage, excessively stream and overheating fault.
3. a kind of H bridges change of current module protection circuit as claimed in claim 2, it is characterised in that the protection circuit also includes
Multiple photoisolators and multiple insulating power supplies；
The instruction process unit is connected by optical fiber all the way with top level control system, receives the driving instruction and/or protection
Instruction；And each power electronic devices by multi-channel optical fibre respectively with H bridge change of current modules is connected, passed to each power electronic devices
Driving instruction and/or protection instruction after the defeated data conversion；Wherein, between each road optical fiber and each power electronic devices
A photoisolator is connected respectively, and each power electronic devices connects an insulating power supply respectively；
First detection unit is connected with each power electronic devices respectively by multi-channel optical fibre, gathers each actual driving arteries and veins
Punching；Wherein, a photoisolator is connected respectively between each road optical fiber and each power electronic devices；
Second detection unit is connected with each measuring unit respectively by multi-channel optical fibre, receives each measuring unit collection
Data；Wherein, photoisolator is connected between each road optical fiber and each measuring unit, and each measuring unit connects one respectively
Insulating power supply.
4. a kind of H bridges change of current module protection circuit as claimed in claim 1, it is characterised in that the protection circuit also includes
Fault processing module, the malfunction for being collected according to the fault detection module is sentenced the H bridges change of current module and occurred
The fault level of failure, and according to the failure of different preset strategy processing different faults grades, be specially：
When the failure is generic failure, the protection instruction that the fault processing module is issued according to the top level control system
Handle the failure；
When the failure is catastrophe failure, the fault processing module quickly blocks each electric power electricity in the H bridges change of current module
The driving pulse of sub- device；Wherein, H bridges change of current module failure degree caused by the catastrophe failure is more than caused by generic failure
H bridge change of current module failure degree.
5. a kind of H bridges change of current module protection circuit as claimed in claim 1, it is characterised in that the protection circuit also includes
For the power module powered to it；The power module includes the Switching Power Supply and battery of parallel connection；Wherein, the battery is being opened
Powered after closing power failure to protection circuit.
6. a kind of H bridges change of current module drive circuit as claimed in claim 5, it is characterised in that the power module also includes
It is connected to the diode between the Switching Power Supply and battery；Wherein, the anode of the diode is connected with Switching Power Supply.
7. a kind of H bridges change of current module drive circuit as claimed in claim 5, it is characterised in that the power module also includes
Switching Power Supply monitoring unit；The Switching Power Supply monitoring unit includes the first divider resistance and first voltage comparator；
One end of first divider resistance is connected with the Switching Power Supply, other end ground connection；
One input of the first voltage comparator gathers the terminal voltage of first divider resistance, and another input is adopted
Collect the first reference voltage, output end is connected with the fault detection module；The fault detection module according to the terminal voltage with
The difference of first reference voltage judges whether the Switching Power Supply breaks down：The Switching Power Supply is turned off if breaking down simultaneously
Control battery is powered to protection circuit.
8. a kind of H bridges change of current module protection circuit as claimed in claim 1, it is characterised in that the protection circuit also includes
Display module；The display module is connected with fault detection module, including multiple indicator lamps；
The display module by changing the bright light color or light on and off state of each indicator lamp, show the H bridges change of current module and/or
Each preset operating state of protection circuit.
9. a kind of H bridges change of current module protection circuit as claimed in claim 8, it is characterised in that described preset operating state
Including Switching Power Supply abnormal operating condition, battery abnormal operating condition, the first over-pressed running status, the second over-pressed running status,
First excessively stream running status, the second excessively stream running status, temperature anomaly running status, driving power supply electric voltage exception running status and
Driving power supply current anomaly running status；
Wherein, the described first over-pressed running status is the overpressure value of power electronic devices in the H bridges change of current module less than specified
The 20% of voltage；Described second over-pressed running status is more than the 20% of rated voltage for the overpressure value of power electronic devices；It is described
First excessively stream running status is less than the 20% of rated current for the overcurrent value of power electronic devices；The second excessively stream running status
It is more than the 20% of rated current for the overcurrent value of power electronic devices.
10. a kind of H bridges change of current module protection circuit as described in claim any one of 1-3, it is characterised in that the protection electricity
Fault detection module, failure feedback module and fault processing module are arranged at complex programmable logic controller CPLD in road
It is interior.
11. a kind of three-phase H bridge cascade converters, the three-phase H bridges cascade converter includes three-phase bridge arm, each phase bridge arm is equal
H bridge change of current modules including multiple cascades；Characterized in that, the three-phase H bridges cascade converter includes multiple such as claims
H bridge change of current module protection circuits described in any one of 1-10.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710190497.1A CN107069670A (en) | 2017-03-28 | 2017-03-28 | A kind of H bridges change of current module protection circuit and three-phase H bridge cascade converters |
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| CN201710190497.1A CN107069670A (en) | 2017-03-28 | 2017-03-28 | A kind of H bridges change of current module protection circuit and three-phase H bridge cascade converters |
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| CN113010335A (en) * | 2019-12-03 | 2021-06-22 | 奥动新能源汽车科技有限公司 | Processing method and processing system for fault information of power change station equipment |
| CN112087703A (en) * | 2020-08-14 | 2020-12-15 | 陕西千山航空电子有限责任公司 | Audio acquisition fault diagnosis method for audio monitor |
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