CN208833850U - A kind of multilevel photovoltaic grid-connected converter On-line Fault identifying system - Google Patents
A kind of multilevel photovoltaic grid-connected converter On-line Fault identifying system Download PDFInfo
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- CN208833850U CN208833850U CN201821432696.5U CN201821432696U CN208833850U CN 208833850 U CN208833850 U CN 208833850U CN 201821432696 U CN201821432696 U CN 201821432696U CN 208833850 U CN208833850 U CN 208833850U
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Abstract
The utility model relates to a kind of multilevel photovoltaic grid-connected converter On-line Fault identifying systems, including system controller, grid voltage monitoring modular, collection-emitter voltage/current monitoring module, baseplate temp sampling module, gate driving and protective module；Grid voltage monitoring modular, collection-emitter voltage/current monitoring module, baseplate temp sampling module input terminal be connected with multilevel photovoltaic grid-connected converter; grid voltage monitoring modular, collection-emitter voltage/current monitoring module, baseplate temp sampling module output end be connected with system controller analog-to-digital conversion module, system controller output control signal sends multilevel photovoltaic grid-connected converter to by gate driving and protective module.The utility model is capable of real-time acquisition the state parameter of power device isolation grid bipolar junction transistor in multilevel photovoltaic grid-connected converter, it quick and precisely the malfunction of online recognition power device and is handled, with ensure that multilevel photovoltaic grid-connected converter safe and stable operation.
Description
Technical field
The utility model belongs to multilevel photovoltaic grid-connected converter technical field, especially a kind of multilevel photovoltaic grid-connected change
Parallel operation On-line Fault identifying system.
Background technique
With insulated gate bipolar crystal in power electronics energy conversion field (such as power inverter and motor drive)
The extensive use of (IGBT) module is managed, the reliability of IGBT module becomes more and more important.To find out its cause, mainly having following two
Point: (1) IGBT module is the essential elements that power electronic system realizes the change of current, thus the condition of its work is more severe, and
It is easier to break down；(2) in high-power power electronic converter, the volume of power device, system and equipment will become to get over
Come compacter, this makes the heat dissipation problem for the system for being continuously increased specific power density become to become increasingly conspicuous.Thus, power electronics
The research of system hot property has become urgent problem to be solved.Previous most research achievement is primarily intended to study such as
What improve system power density, and study power device or power electronic system fever and heat dissipation problem it is less.So
Be not difficult to obtain to draw a conclusion, the superiority and inferiority of the working performance of power electronic system both with the form of its topological structure and control strategy
The factors such as selection are related and related with the hot property of its power device or system.How in multilevel photovoltaic grid-connected converter
Power device to carry out real time fail on-line monitoring be problem in the urgent need to address at present.
Utility model content
It is overcome the deficiencies in the prior art to the mesh of the utility model, proposes a kind of multilevel photovoltaic grid-connected converter event
Hinder online recognition system, solves the problems, such as to carry out multilevel photovoltaic grid-connected converter real time fail on-line monitoring.
The utility model solves its technical problem and adopts the following technical solutions to achieve:
A kind of multilevel photovoltaic grid-connected converter On-line Fault identifying system, it is characterised in that: including system controller, grid
Pole tension monitoring modular, collection-emitter voltage/current monitoring module, baseplate temp sampling module, gate driving and protective module；
The grid voltage monitoring modular, collection-emitter voltage/current monitoring module, baseplate temp sampling module input terminal with it is mostly electric
Flat photovoltaic grid-connected converter be connected and acquire respectively insulated gate bipolar transistor (IGBT) grid voltage, collection-emitter voltage/
Electric current and baseplate temp, the grid voltage monitoring modular, collection-emitter voltage/current monitoring module, baseplate temp sampling module
Output end be connected with system controller analog-to-digital conversion module, the system controller export control signal to gate driving with
Protective module, the gate driving are connected with protective module with multilevel photovoltaic grid-connected converter.
The system controller be built-in with signal processing and fault diagnosis module and with signal processing and fault diagnosis mould
The first analog-to-digital conversion module that block is connected, the second analog-to-digital conversion module, third analog-to-digital conversion module, control signal export mould
Block；First analog-to-digital conversion module, the second analog-to-digital conversion module, third analog-to-digital conversion module monitor mould with grid voltage respectively
Block, collection-emitter voltage/current monitoring module, baseplate temp sampling module are connected, the control signal output module and grid
Driving is connected with protective module.
The grid voltage monitoring modular includes resistance R26, resistance R27, resistance R28, resistance R29, resistance R48, resistance
R53, resistance R102, diode V11, diode V12, diode V32, diode V36, capacitor C9, capacitor C37 and operation are put
Big device N1A, operational amplifier N1B, wherein capacitor C37 is connected in parallel with resistance R102, and capacitor C37 mono- terminates more level photovoltaics
The emitter of the IGBT module of grid-connection converter and the in-phase end of operational amplifier N1A, and be grounded jointly；The capacitor C37 other end
Connect the grid of IGBT module and one end of resistance R27；The reverse side of another termination operational amplifier N1A of resistance R27；Two operations
The feeder ear of amplifier is connected to power supply+V2, on-V2 power supply；Series electrical between the reverse side and output end of operational amplifier N1A
Hinder R28；Connect R29 between the output end of operational amplifier N1A and the reverse side of operational amplifier N1B；Operational amplifier N1B's
In-phase end ground connection；The reverse side of one termination operational amplifier N1B of the anode and resistance R26 of diode V12, resistance R26's is another
The cathode of one terminating diode V11, the cathode of diode V12 and the anode of diode V11 are connected to operational amplifier N1B's jointly
Output end；The cathode of a terminating diode V11 of resistance R48, the cathode of another terminating diode V32；The anode of diode V32
Ground connection, capacitor C9 are connected in parallel with diode V32；The cathode of diode V36 meets power supply+V1A, and diode V36 anode is connected to two
The cathode of pole pipe V32 and one end of resistance R53；First analog-to-digital conversion module of another terminating systems controller of resistance R53.
Collection-emitter voltage/current monitoring the module include resistance R134, resistance R135, resistance R141, resistance R142,
Resistance R143, resistance R144, resistance R145, resistance R155, resistance R166, resistance R168, resistance R241, resistance R242, resistance
R243, resistance R244, resistance R245, diode V7, diode V8, diode V17, diode V18, capacitor C48, capacitor C49
And operational amplifier N7A, operational amplifier N7B；Resistance R141, resistance R142, resistance R143, resistance R144, resistance R145
It is connected in series, which terminates the IGBT collector of multilevel photovoltaic grid-connected converter, another termination operational amplifier
The reverse side of N7B；Resistance R241, resistance R242, resistance R243, resistance R244, resistance R245 are connected in series, the series circuit one
Terminate the IGBT emitter of multilevel photovoltaic grid-connected converter, the in-phase end of another termination operational amplifier N7B；Diode V7,
Diode V8 inverse parallel is connected between the in-phase end and reverse side of operational amplifier N7B；The feeder ear of two operational amplifiers connects
It is connected on+V2 ,-V2 power supply；The one end resistance R134 ground connection, the in-phase end of another termination operational amplifier N7B；Operational amplifier
Series resistance R135 between the reverse side and output end of N7B；The output end of operational amplifier N7B is anti-with operational amplifier N7A's
Series resistance R155 between phase end；The in-phase end of operational amplifier N7A is grounded；The reverse side and output end of operational amplifier N7A
Between series resistance R166, and capacitor C48 and resistance R166 is connected in parallel；Resistance R168 mono- terminates the defeated of operational amplifier N7A
Outlet, the cathode of another terminating diode V18；The plus earth of diode V18, capacitor C49 are connected in parallel with diode V18；
The cathode of diode V17 meets power supply+V1A, diode V17 anode be connected to diode V18 cathode and system controller second
Analog-to-digital conversion module.
The baseplate temp sampling module includes resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, resistance
R15, resistance R16 and operational amplifier N2A, operational amplifier N2B, resistance R10 mono- terminate multilevel photovoltaic grid-connected converter
IGBT bottom plate NTC temperature sensor, resistance R11 mono- terminates reference voltage signal, and the other end of resistance R10 and resistance R11 are total
With the reverse side for being connected to operational amplifier N2A；The one end resistance R12 ground connection, the in-phase end of another termination operational amplifier N2A；Two
The feeder ear of a operational amplifier is connected on V+, V- power supply, series electrical between the reverse side and output end of operational amplifier N2A
Hinder R13；Series resistance R15 between the output end of operational amplifier N2A and the reverse side of operational amplifier N2B；The one end resistance R14
Ground connection, the in-phase end of another termination operational amplifier N2B；Series resistance between the reverse side and output end of operational amplifier N2B
R16；The third analog-to-digital conversion module of the output terminating systems controller of operational amplifier N2B.
The gate driving and protective module include resistance R20, resistance R21, resistance R22, resistance R23, resistance R24 and fortune
Amplifier N3 is calculated, mono- end resistance R20 is connected to the reverse input end of operational amplifier N3, and the other end is connected to reference voltage；Resistance
One end of R23 is connected to the reverse input end of operational amplifier N3, other end ground connection；Mono- terminating systems controller of resistance R21 is defeated
Signal out, the positive input of another termination operational amplifier N3；Operational amplifier N3 feeder ear is connected on V+, V- power supply,
The output of operational amplifier N3 is terminated at one end of resistance R22 and resistance R24, the positive supply V+ of another termination N3 of resistance R22
Input terminal, the other end ground connection of resistance R24, the pressure regulation of resistance R24 terminate the IGBT module of multilevel photovoltaic grid-connected converter
Grid.
The system controller is also connected with host computer and believes multilevel photovoltaic grid-connected converter fault state monitoring
Breath is transferred to host computer.
The advantages and positive effects of the utility model are as follows:
1, the On-line Fault identifying system of the utility model passes through grid voltage monitoring modular, collection-emitter voltage/electric current prison
Survey module, baseplate temp sampling module can acquire the state ginseng of IGBT power module in multilevel photovoltaic grid-connected converter in real time
Number quick and precisely the malfunction of online recognition power device and is handled, with ensure that multilevel photovoltaic grid-connected converter
Safe and stable operation.
2, by being converted to using electric signal measurable outside IGBT power semiconductor modular as monitoring object, electricity is made full use of
Power device fault degree in multilevel photovoltaic grid-connected converter is known in the rapidity and accuracy of signal, realization online
Not.
3, the On-line Fault identifying system is based on PWM pulsewidth modulation strategy, for the power half of switch control
Conductor device has versatility, has the commercially viable prospect utilized.
4, the result of real time on-line monitoring can also be sent to host computer and realize long-range monitoring function, side by the utility model
Remote monitoring personnel use.
Detailed description of the invention
Fig. 1 is the multilevel photovoltaic grid-connected converter On-line Fault identifying system connection figure of the utility model；
Fig. 2 is existing multilevel photovoltaic grid-connected converter topology figure；
Fig. 3 is grid voltage monitoring modular circuit diagram；
Fig. 4 is collection-emitter voltage/current monitoring module circuit diagram；
Fig. 5 is baseplate temp sampling module circuit diagram；
Fig. 6 is gate driving and protective module circuit diagram.
Specific embodiment
The utility model embodiment is further described below in conjunction with attached drawing.
A kind of multilevel photovoltaic grid-connected converter On-line Fault identifying system is for existing more level light shown in Fig. 2
It lies prostrate grid-connection converter and carries out real time fail on-line monitoring.
As shown in Figure 1, multilevel photovoltaic grid-connected converter On-line Fault identifying system includes system controller, grid voltage
Monitoring modular, collection-emitter voltage/current monitoring module, baseplate temp sampling module, gate driving and protective module and upper
Machine.The system controller is built-in with signal processing and is connected with fault diagnosis module and with signal processing with fault diagnosis module
The first analog-to-digital conversion module, the second analog-to-digital conversion module, the third analog-to-digital conversion module, control signal output module connect；It is described
Grid voltage monitoring modular is connected and composed by grid voltage synchronized sampling circuit and the first signal conditioning module, the collection-emitter-base bandgap grading
Voltage/current monitoring modular is connected and composed by collection-emitter voltage/current synchronization using circuit and second signal conditioning module, institute
Baseplate temp sampling module is stated to be connected by IGBT module baseplate temp sample circuit, temperature transmitting module and third signal conditioning module
It connects composition, the gate driving and protective module and connect structure with lockout circuit and fourth signal conditioning circuit by driving signal triggering
At.The grid voltage monitoring modular, collection-emitter voltage/current monitoring module, the input terminal of baseplate temp sampling module and more
Level photovoltaic grid-connected converter be connected respectively acquire insulated gate bipolar transistor (IGBT) grid voltage, collection-emitter voltage/
Electric current and baseplate temp simultaneously send system controller to after signal conditioning circuit, and system controller passes through the first modulus respectively and turns
Parallel operation, the second analog-digital converter, third analog-digital converter are to the grid voltage, collection-emitter voltage/electric current and baseplate temp of acquisition
Convert and judged by signal processing and fault diagnosis module, and passes through control signal output module output control signal
To gate driving and protective module, driving signal triggering is connected with lockout circuit by fourth signal conditioning circuit, and the 4th
After signal conditioning circuit improves output control signal, from driving signal triggering and lockout circuit to multilevel photovoltaic grid-connected
Converter is sent.
In this On-line Fault identifying system, the power device parameters in multilevel photovoltaic grid-connected converter pass through grid electricity
Pressure synchronized sampling circuit, collection-emitter voltage/current synchronization sample circuit, IGBT module baseplate temp sample circuit are obtained,
Then the pretreatment that signal is carried out via three signal conditioning modules, is separately input to three analog-to-digital conversion moulds of system controller
Block after eventually passing through signal processing and fault diagnosis module, carries out loss calculation and the junction temperature estimation of online power device, and benefit
Real-time regulation and control is carried out to power device with control signal output module and gate driving and protective module, while can be real
When the state of power device is monitored on-line by host computer.
In the present embodiment, grid voltage monitoring modular physical circuit is as shown in figure 3, include resistance R26, resistance R27, electricity
Hinder R28, resistance R29, resistance R48, resistance R53, resistance R102, diode V11, diode V12, diode V32, diode
V36, capacitor C9, capacitor C37 and operational amplifier N1A, operational amplifier N1B (using TL082 chip), wherein capacitor C37
It is connected in parallel with resistance R102, capacitor C37 mono- terminates emitter and the operation of the IGBT module of multilevel photovoltaic grid-connected converter
The in-phase end of amplifier N1A, and be grounded jointly；The grid of another termination IGBT module of capacitor C37 and one end of resistance R27；Electricity
Hinder the reverse side of another termination operational amplifier N1A of R27；The feeder ear of two operational amplifiers is connected to power supply+V2 ,-V2 electricity
On source；Series resistance R28 between the reverse side and output end of operational amplifier N1A；The output end of operational amplifier N1A and operation
Connect R29 between the reverse side of amplifier N1B；The in-phase end of operational amplifier N1B is grounded；The anode and resistance of diode V12
The reverse side of a termination operational amplifier N1B of R26, the cathode of another terminating diode V11 of resistance R26, diode V12's
The anode of cathode and diode V11 are connected to the output end of operational amplifier N1B jointly；A terminating diode V11's of resistance R48
Cathode, the cathode of another terminating diode V32；The plus earth of diode V32, capacitor C9 are connected in parallel with diode V32；Two
The cathode of pole pipe V36 meets power supply+V1A, and diode V36 anode is connected to the cathode of diode V32 and one end of resistance R53；Resistance
First analog-to-digital conversion module of another terminating systems controller of R53.
In the present embodiment, collection-emitter voltage/current monitoring module physical circuit as shown in figure 4, include resistance R134,
Resistance R135, resistance R141, resistance R142, resistance R143, resistance R144, resistance R145, resistance R155, resistance R166, resistance
R168, resistance R241, resistance R242, resistance R243, resistance R244, resistance R245, diode V7, diode V8, diode
V17, diode V18, capacitor C48, capacitor C49 and operational amplifier N7A, operational amplifier N7B (using TL082 chip)；
Resistance R141, resistance R142, resistance R143, resistance R144, resistance R145 are connected in series, which terminates more level light
Lie prostrate the IGBT collector of grid-connection converter, the reverse side of another termination operational amplifier N7B；Resistance R241, resistance R242, resistance
R243, resistance R244, resistance R245 are connected in series, which terminates the IGBT transmitting of multilevel photovoltaic grid-connected converter
Pole, the in-phase end of another termination operational amplifier N7B；Diode V7, diode V8 inverse parallel are connected to the same of operational amplifier N7B
Between phase end and reverse side；The feeder ear of two operational amplifiers is connected on+V2 ,-V2 power supply；The one end resistance R134 ground connection,
The in-phase end of another termination operational amplifier N7B；Series resistance R135 between the reverse side and output end of operational amplifier N7B；
Series resistance R155 between the output end of operational amplifier N7B and the reverse side of operational amplifier N7A；Operational amplifier N7A's
In-phase end ground connection；Series resistance R166 between the reverse side and output end of operational amplifier N7A, and capacitor C48 and resistance R166
It is connected in parallel；Resistance R168 mono- terminates the output end of operational amplifier N7A, the cathode of another terminating diode V18；Diode
The plus earth of V18, capacitor C49 are connected in parallel with diode V18；The cathode of diode V17 meets power supply+V1A, diode V17
Anode is connected to the cathode of diode V18 and the second analog-to-digital conversion module of system controller.
In the present embodiment, baseplate temp sampling module physical circuit is as shown in figure 5, include resistance R10, resistance R11, electricity
Hinder R12, resistance R13, resistance R14, resistance R15, resistance R16 and operational amplifier N2A, operational amplifier N2B, resistance R10
The IGBT bottom plate NTC temperature sensor of the one multilevel photovoltaic grid-connected converter of termination, resistance R11 mono- terminate reference voltage signal,
The other end of resistance R10 and resistance R11 are connected to the reverse side of operational amplifier N2A jointly；The one end resistance R12 ground connection, the other end
Connect the in-phase end of operational amplifier N2A；The feeder ear of two operational amplifiers is connected on V+, V- power supply, operational amplifier N2A
Reverse side and output end between series resistance R13；The output end of operational amplifier N2A and the reverse side of operational amplifier N2B
Between series resistance R15；The one end resistance R14 ground connection, the in-phase end of another termination operational amplifier N2B；Operational amplifier N2B's
Series resistance R16 between reverse side and output end；The third analog-to-digital conversion of the output terminating systems controller of operational amplifier N2B
Module.
In the present embodiment, gate driving and protective module physical circuit as shown in fig. 6, include resistance R20, resistance R21,
Resistance R22, resistance R23, resistance R24 and operational amplifier N3, mono- end resistance R20 are connected to the reversed input of operational amplifier N3
End, the other end are connected to reference voltage；One end of resistance R23 is connected to the reverse input end of operational amplifier N3, another termination
Ground；Mono- terminating systems controller output signal of resistance R21, the positive input of another termination operational amplifier N3；Operation amplifier
Device N3 feeder ear is connected on V+, V- power supply, and the output of operational amplifier N3 is terminated at one end of resistance R22 and resistance R24, electricity
The positive supply V+ input terminal of another termination N3 of R22, the other end ground connection of resistance R24 are hindered, the pressure regulation of resistance R24 terminates more level
The grid of the IGBT module of photovoltaic grid-connected converter.
It is emphasized that embodiment described in the utility model be it is illustrative, without being restrictive, therefore this reality
Embodiment described in specific embodiment is not limited to novel, it is all according to the present utility model by those skilled in the art
The other embodiments that technical solution obtains also belong to the range of the utility model protection.
Claims (7)
1. a kind of multilevel photovoltaic grid-connected converter On-line Fault identifying system, it is characterised in that: including system controller, grid
Voltage monitoring module, collection-emitter voltage/current monitoring module, baseplate temp sampling module, gate driving and protective module；Institute
State the input terminal and more level of grid voltage monitoring modular, collection-emitter voltage/current monitoring module, baseplate temp sampling module
Photovoltaic grid-connected converter is connected and acquires insulated gate bipolar transistor (IGBT) grid voltage, collection-emitter voltage/electricity respectively
Stream and baseplate temp, the grid voltage monitoring modular, collection-emitter voltage/current monitoring module, baseplate temp sampling module
Output end is connected with system controller analog-to-digital conversion module, and the system controller exports control signal to gate driving and protects
Module is protected, the gate driving is connected with protective module with multilevel photovoltaic grid-connected converter.
2. a kind of multilevel photovoltaic grid-connected converter On-line Fault identifying system according to claim 1, it is characterised in that:
The system controller is built-in with signal processing and is connected with fault diagnosis module and with signal processing with fault diagnosis module
The first analog-to-digital conversion module, the second analog-to-digital conversion module, third analog-to-digital conversion module, control signal output module；Described
One analog-to-digital conversion module, the second analog-to-digital conversion module, third analog-to-digital conversion module respectively with grid voltage monitoring modular, collect-penetrate
Pole tension/current monitoring module, baseplate temp sampling module are connected, the control signal output module and gate driving and guarantor
Shield module is connected.
3. a kind of multilevel photovoltaic grid-connected converter On-line Fault identifying system according to claim 1, it is characterised in that:
The grid voltage monitoring modular includes resistance R26, resistance R27, resistance R28, resistance R29, resistance R48, resistance R53, resistance
R102, diode V11, diode V12, diode V32, diode V36, capacitor C9, capacitor C37 and operational amplifier N1A,
Operational amplifier N1B, wherein capacitor C37 is connected in parallel with resistance R102, and capacitor C37 mono- terminates multilevel photovoltaic grid-connected transformation
The emitter of the IGBT module of device and the in-phase end of operational amplifier N1A, and be grounded jointly；Another termination IGBT mould of capacitor C37
The grid of block and one end of resistance R27；The reverse side of another termination operational amplifier N1A of resistance R27；Two operational amplifiers
Feeder ear is connected to power supply+V2, on-V2 power supply；Series resistance R28 between the reverse side and output end of operational amplifier N1A；Fortune
Calculate the R29 that connects between the output end and the reverse side of operational amplifier N1B of amplifier N1A；The in-phase end of operational amplifier N1B connects
Ground；The reverse side of one termination operational amplifier N1B of the anode and resistance R26 of diode V12, another termination two of resistance R26
The cathode of pole pipe V11, the cathode of diode V12 and the anode of diode V11 are connected to the output end of operational amplifier N1B jointly；
The cathode of a terminating diode V11 of resistance R48, the cathode of another terminating diode V32；The plus earth of diode V32, electricity
Hold C9 and diode V32 to be connected in parallel；The cathode of diode V36 meets power supply+V1A, and diode V36 anode is connected to diode V32
Cathode and resistance R53 one end；First analog-to-digital conversion module of another terminating systems controller of resistance R53.
4. a kind of multilevel photovoltaic grid-connected converter On-line Fault identifying system according to claim 1, it is characterised in that:
Collection-emitter voltage/current synchronization the sampling module includes resistance R134, resistance R135, resistance R141, resistance R142, resistance
R143, resistance R144, resistance R145, resistance R155, resistance R166, resistance R168, resistance R241, resistance R242, resistance R243,
Resistance R244, resistance R245, diode V7, diode V8, diode V17, diode V18, capacitor C48, capacitor C49 and fortune
Calculate amplifier N7A, operational amplifier N7B；Resistance R141, resistance R142, resistance R143, resistance R144, resistance R145 series connection connect
It connects, which terminates the IGBT collector of multilevel photovoltaic grid-connected converter, and another termination operational amplifier N7B's is anti-
Xiang Duan；Resistance R241, resistance R242, resistance R243, resistance R244, resistance R245 are connected in series, which terminates more
The IGBT emitter of level photovoltaic grid-connected converter, the in-phase end of another termination operational amplifier N7B；Diode V7, diode
V8 inverse parallel is connected between the in-phase end and reverse side of operational amplifier N7B；The feeder ear of two operational amplifiers is connected to+
On V2 ,-V2 power supply；The one end resistance R134 ground connection, the in-phase end of another termination operational amplifier N7B；Operational amplifier N7B's is anti-
Series resistance R135 between Xiang Duanyu output end；Between the output end of operational amplifier N7B and the reverse side of operational amplifier N7A
Series resistance R155；The in-phase end of operational amplifier N7A is grounded；It connects between the reverse side of operational amplifier N7A and output end
Resistance R166, and capacitor C48 and resistance R166 is connected in parallel；Resistance R168 mono- terminates the output end of operational amplifier N7A, another
The cathode of terminating diode V18；The plus earth of diode V18, capacitor C49 are connected in parallel with diode V18；Diode V17
Cathode meet power supply+V1A, diode V17 anode is connected to the cathode of diode V18 and the second analog-to-digital conversion mould of system controller
Block.
5. a kind of multilevel photovoltaic grid-connected converter On-line Fault identifying system according to claim 1, it is characterised in that:
The baseplate temp sampling module includes resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, resistance R15, resistance
R16 and operational amplifier N2A, operational amplifier N2B, resistance R10 mono- terminate the bottom IGBT of multilevel photovoltaic grid-connected converter
The other end of plate NTC temperature sensor, the termination reference voltage signal of resistance R11 mono-, resistance R10 and resistance R11 are connected to fortune jointly
Calculate the reverse side of amplifier N2A；The one end resistance R12 ground connection, the in-phase end of another termination operational amplifier N2A；Two operations are put
The feeder ear of big device is connected on V+, V- power supply, series resistance R13 between the reverse side and output end of operational amplifier N2A；Fortune
Calculate series resistance R15 between the output end of amplifier N2A and the reverse side of operational amplifier N2B；The one end resistance R14 ground connection, separately
The in-phase end of one termination operational amplifier N2B；Series resistance R16 between the reverse side and output end of operational amplifier N2B；Operation
The third analog-to-digital conversion module of the output terminating systems controller of amplifier N2B.
6. a kind of multilevel photovoltaic grid-connected converter On-line Fault identifying system according to claim 1, it is characterised in that:
The gate driving and protective module include resistance R20, resistance R21, resistance R22, resistance R23, resistance R24 and operational amplifier
Mono- end N3, resistance R20 is connected to the reverse input end of operational amplifier N3, and the other end is connected to reference voltage；One end of resistance R23
It is connected to the reverse input end of operational amplifier N3, other end ground connection；Mono- terminating systems controller output signal of resistance R21, separately
The positive input of one termination operational amplifier N3；Operational amplifier N3 feeder ear is connected on V+, V- power supply, operational amplifier
The output of N3 is terminated at one end of resistance R22 and resistance R24, the positive supply V+ input terminal of another termination N3 of resistance R22, resistance
The other end of R24 is grounded, and the pressure regulation of resistance R24 terminates the grid of the IGBT module of multilevel photovoltaic grid-connected converter.
7. a kind of multilevel photovoltaic grid-connected converter On-line Fault identifying system according to any one of claims 1 to 6,
Be characterized in that: the system controller is also connected with host computer and believes multilevel photovoltaic grid-connected converter fault state monitoring
Breath is transferred to host computer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721188334 | 2017-09-18 | ||
| CN2017211883341 | 2017-09-18 |
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| Publication Number | Publication Date |
|---|---|
| CN208833850U true CN208833850U (en) | 2019-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821432696.5U Expired - Fee Related CN208833850U (en) | 2017-09-18 | 2018-09-03 | A kind of multilevel photovoltaic grid-connected converter On-line Fault identifying system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113739396A (en) * | 2021-09-01 | 2021-12-03 | 四川省建筑科学研究院有限公司 | Hydraulic balance debugging system for central air conditioner |
-
2018
- 2018-09-03 CN CN201821432696.5U patent/CN208833850U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113739396A (en) * | 2021-09-01 | 2021-12-03 | 四川省建筑科学研究院有限公司 | Hydraulic balance debugging system for central air conditioner |
| CN113739396B (en) * | 2021-09-01 | 2023-02-03 | 四川省建筑科学研究院有限公司 | Hydraulic balance debugging system for central air conditioner |
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