CN206226299U - Modularized current transformer - Google Patents
Modularized current transformer Download PDFInfo
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- CN206226299U CN206226299U CN201621291453.5U CN201621291453U CN206226299U CN 206226299 U CN206226299 U CN 206226299U CN 201621291453 U CN201621291453 U CN 201621291453U CN 206226299 U CN206226299 U CN 206226299U
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Abstract
The utility model provides a kind of Modularized current transformer, including multiple power cells, and the multiple power cell control devices connected one to one with multiple power cells；The power cell control device includes power cell controller, IGBT drive circuit, fault comprehensive circuit, AD sampling A/D chips, communication chip, digital quantity input chip and digital quantity pio chip, and is connected with the power cell controller respectively.The Modularized current transformer, realize in Modularized current transformer each power cell provide in time, reliable control and while defencive function, meet the synchronism requirement of current transformer operation, and so that aspergillus ficuum between power cell.
Description
Technical field
The utility model is related to power electronics control technology field, more particularly to a kind of Modularized current transformer.
Background technology
With traditional current transformer contrastingly, the modularized design of current transformer has reliability higher, maintainability, sets
The features such as meter flexibility.By taking modularization inverter as an example, modularization inverter is exactly using ac converter part an as power
Unit is designed, and every modularization inverter is all made up of several power cells.
However, above-mentioned modularized design increased control difficulty.Control difficulty is mainly reflected in following several respects, and one is mould
When block current transformer runs, the synchronism requirement of current transformer operation, and aspergillus ficuum between power cell need to be met；Two is that needs are
Each power cell is provided and in time, reliably controlled and defencive function in Modularized current transformer.
Utility model content
The purpose of the utility model embodiment is, there is provided a kind of Modularized current transformer, makes in Modularized current transformer each
While power cell is obtained in that timely, reliable control and defencive function, the requirement that current transformer runs synchronism is met,
And so that aspergillus ficuum between power cell.
To realize above-mentioned utility model purpose, embodiment of the present utility model provides a kind of Modularized current transformer, also wraps
Include：The multiple power cell control devices connected one to one with the multiple power cell；The power cell control device
Including power cell controller, IGBT drive circuit, fault comprehensive circuit, AD sampling A/D chips, communication chip, digital quantity input core
Piece and digital quantity pio chip, and be connected with the power cell controller respectively.
Preferably, the power cell controller includes：PWM control modules, AD control modules, fault processing module, open
Enter control module, output control module and communication module；
The PWM control modules respectively with the fault processing module, the AD control modules and the communication module phase
Connection, the AD control modules, the fault processing module, it is described open into control module, it is described output control module respectively with
The communication module is connected.
Preferably, the PWM control modules are connected with the IGBT drive circuit, the AD control modules and the AD
Sampling A/D chip is connected, and the fault processing module is connected with the fault comprehensive circuit, described to open into control module and institute
State digital quantity input chip to be connected, the control module of outputing is connected with the digital output chip, the communication mould
Block is connected with the communication chip.
Preferably, the PWM module receives the duty cycle data that the communication module is issued, and according to the dutycycle number
According to output pwm pulse to the IGBT drive circuit.
Preferably, obtained in the fault-signal that the fault processing module sends from the fault comprehensive circuit for receiving
Fault message, and fault message is uploaded to communication module.
Preferably, the communication module is any in fiber optic telecommunications module, bluetooth module, WIFI module, infrared module
It is a kind of.
Preferably, the power cell controller is field programmable gate array FPGA or complicated programmable logic device
Part CPLD.
Preferably, the Modularized current transformer is Modular photovoltaic inverter.
The Modularized current transformer that the utility model embodiment is provided, a power list is configured by for each power cell
First control device, includes power cell controller and IGBT drive circuit, fault comprehensive in each power cell control device
Peripheral circuit and the chips such as circuit, AD sampling A/D chips, cooperate between power cell controller and peripheral circuit and chip, make
While each power cell is obtained in that timely, reliable control and defencive function in Modularized current transformer, unsteady flow is met
The synchronism requirement of device operation, and so that aspergillus ficuum between power cell, so as to improve grid-connected performance.
Brief description of the drawings
Fig. 1 is the structured flowchart of the Modularized current transformer of the utility model embodiment one；For convenience of understanding, shown in figure
Power cell；
Fig. 2 illustrates for the operation principle of power cell controller in the Modularized current transformer of the utility model embodiment one
Figure；
Fig. 3 is the structured flowchart of power cell controller in the Modularized current transformer of the utility model embodiment one；It is side
Just understand, IGBT drive circuit, fault comprehensive circuit, AD sampling A/D chips, communication chip, digital quantity input chip are shown in figure
With digital quantity pio chip.
Specific embodiment
The utility model embodiment Modularized current transformer is described in detail below in conjunction with the accompanying drawings.Following examples are used for
The utility model is illustrated, but is not limited to scope of the present utility model.
It will be understood by those skilled in the art that the term such as " first ", " second " in the utility model embodiment is only used for
Difference different step, equipment or module etc., neither represent any particular technology implication, also do not indicate that the inevitable logic between them
Sequentially.
Embodiment one
Fig. 1 is the structured flowchart of the Modularized current transformer of the utility model embodiment one.Reference picture 1, Modularized current transformer
Including：Multiple power cells 110, and the multiple power cell control devices connected one to one with multiple power cells 110
120；Power cell control device 120 include power cell controller 121, IGBT drive circuit 122, fault comprehensive circuit 123,
AD sampling A/D chips 124, communication chip 125, digital quantity input chip 126 and digital quantity pio chip 127, wherein, IGBT drives
Circuit 122, fault comprehensive circuit 123, AD sampling A/D chips 124, communication chip 125, digital quantity input chip 126 and digital quantity are defeated
Go out chip 127 to be connected with power cell controller 121 respectively.
Here, Modularized current transformer can be Modular photovoltaic inverter, but not limited to this.
Fig. 2 illustrates for the operation principle of power cell controller in the Modularized current transformer of the utility model embodiment one
Figure, is described in detail with reference to Fig. 2 to the operation principle of power cell controller 121.
Its operation principle is specific as follows：In actual applications, the respective power cell control of multiple power cell control devices
Device processed is connected with master control system respectively.By taking Modular photovoltaic inverter as an example, when electricity on Modular photovoltaic inverter, master control
The mode of operation command down-transmitting of peripheral hardware circuit is given power cell controller by system.The power cell controller according to
Configuration order, sends corresponding control command to AD sampling A/D chips, digital quantity input chip and digital quantity pio chip and performs
Corresponding operation.For example, power cell controller control AD sampling A/D chips gather the alternating voltage of each power cell, electric current,
DC voltage, current data, and sampled data to master control system is uploaded by the way of fiber optic communication.When master control system judges mould
When block photovoltaic DC-to-AC converter fault-free can start, then startup and duty command are issued, power cell controller completes PWM and drives
The generation of dynamic signal.In the power cell course of work, each voltage x current of power cell controller real-time monitoring and failure are believed
Number, when a failure occurs it, pwm pulse is blocked, AC power circuit switching S is disconnected by digital output circuit, and upload failure letter
Breath waits the troubleshooting of master control system to master control system.After waiting system fault recovery, the restarting of power cell controller
Driving function so that the power cell of corresponding connection is reworked.
In actual applications, above-mentioned IGBT drive circuit 122 specifically may include photoelectric isolated chip, the power being linked in sequence
Amplifying circuit and protection circuit.Wherein, photoelectric isolated chip is used to isolate from power cell controller 121 (such as FPGA) output
The power circuit of light current PWM drive signal and strong power part；Power amplification circuit is used to distinguish forward and reverse driving, it is ensured that drive electricity
There are enough driving force and reverse turn-off capacities on road；Protection circuit is integrated with overvoltage/undervoltage protection and the IGBT of drive circuit
Overcurrent turn-off function function.Fault comprehensive circuit 123 specifically may include signal acquisition circuit, signal amplification circuit and the ratio being linked in sequence
Compared with circuit, the threshold value of comparison circuit is set by hardware circuit parameter configuration.Signal after gathering and amplifying is higher than or low
When the threshold value, low level signal, output to power cell controller 121 are produced.
The Modularized current transformer of the utility model embodiment, a power cell control is configured by for each power cell
Device processed, included in each power cell control device power cell controller and IGBT drive circuit, fault comprehensive circuit,
The peripheral circuits such as AD sampling A/D chips and chip.Cooperated between power cell controller and peripheral circuit and chip, realized
For in Modularized current transformer each power cell provide in time, reliable control and while defencive function, meet current transformer
The synchronism requirement of operation, and so that aspergillus ficuum between power cell, so as to improve grid-connected performance.
On the basis of above-described embodiment, Fig. 3 is power cell in the Modularized current transformer of the utility model embodiment one
The structured flowchart of controller, reference picture 3, power cell controller 121 can include：PWM control modules 210, AD control mould
Block 220, fault processing module 230, open into control module 240, output control module 250 and communication module 260；PWM controls mould
Block 210 is connected with fault processing module 230, AD control modules 220 and communication module 260 respectively, AD control modules 220, event
Barrier processing module 230, open into control module 240, output control module 250 and be connected with communication module 260 respectively.
Additionally, PWM control modules 210, AD control modules 220, fault processing module in power cell controller 121
230th, open into control module 240, output control module 250 and communication module 260 and have with peripheral circuit or external chip respectively
There is annexation, to realize the functions such as control, protection to peripheral circuit or external chip.
As shown in figure 3, PWM control modules 210 are connected with IGBT drive circuit 122, AD control modules 220 are sampled with AD
Chip 124 is connected, and fault processing module 230 is connected with fault comprehensive circuit 123, opens into control module 240 and digital quantity
Input chip 126 be connected, output control module 250 and be connected with digital output chip 127, communication module 260 with communicate
Chip 125 is connected.
Further, PWM module 210 can receive the duty cycle data that communication module 260 is issued, and according to duty cycle data
Export pwm pulse to IGBT drive circuit 122.
Preferably, event is obtained in the fault-signal that fault processing module 230 sends from the fault comprehensive circuit 123 for receiving
Barrier information, and fault message is uploaded to communication module 260.
In actual applications, during system electrification, master control system (such as accounts for the mode of operation configuration order of peripheral hardware circuit
Empty ratio, AD working methods, output order, chip drives signal etc.) it is handed down to power cell controller 121.The power cell control
Communication module 260 in device processed 121 receives configuration order, and gives PWM controls according to the configuration order corresponding control command of transmission
Module 210, AD control modules 220, open into control module 240, output control module 250, and then controlling IGBT drive circuit
122nd, AD sampling A/D chips, digital quantity input chip and digital quantity pio chip perform corresponding operation.
Specifically, dutycycle is handed down to PWM control modules 210, the output of PWM control modules 210 PWM by communication module 260
Pulse is to IGBT drive circuit 122.PWM control modules 210 send AD enabling signals to AD control modules 220.
The setting of AD working methods is sent to AD control modules 220 by communication module 260, and AD control modules 220 send AD and drive
Dynamic signal also receives the AD sampled datas that AD sampling A/D chips 124 are returned, and AD sampled datas are cached to AD sampling A/D chips 124
To after respective appropriate address, communication module 260 is uploaded to.
Above-mentioned each signal definition：
(1) dutycycle：The pulse width signal of PWM driving pulses is produced, the switch time of IGBT is characterized.
(2) AD enabling signals：The enabling signal of FPGA inside A/D module.The AD control modules of the utility model design need
Receive the control signal just sent after startup is ordered to outside A/D chip.
(3) AD working methods：Work or stop, the control device of the utility model design is general purpose controller, therefore
Its work or stopping can be respectively provided with for peripheral A/D chip.
(4) AD drive signals：A/D chip in the utility model is both needed to, by serial ports transmission timing control command, can just make
AD normal works.These control signals are including starting the signals such as order, clock, address.
(5) AD sampled datas：That is the output of A/D chip, the signal is the serial data for containing address information, according to AD
The difference of chip, exports digit.Be sent to for chip drives signal and open into control module 240 by communication module 260, opens into control
Molding block 240 forwards the chip drives signal to digital quantity to be input into chip 126, also receives what digital quantity input chip 126 sent
Open into signal, and spread on signal into information to communication module 260 according to being outputed.
Coordinate by modules in power cell controller 121 and corresponding peripheral hardware circuit and complete above-mentioned action,
So that power cell 110 enters the course of work.In the course of work of power cell 110, the real-time monitoring of power cell controller 121
Each voltage x current and fault-signal of corresponding power cell 110.
When a failure occurs it, fault comprehensive circuit 123 sends to fault processing module 230, troubleshooting fault-signal
After module 230 receives the fault-signal, the signal for indicating block pwm pulse is sent to PWM control modules 210, meanwhile,
Fault processing module 230 obtains fault message from fault-signal, and fault message is uploaded into communication module 260, and communicate mould
After block 260 receives fault message, issue and output order to control module 250 is outputed, output control module 250 by chip drives
Signal and output order are sent to digital output chip 127, to disconnect the breaker of AC.Also, communication module 260 is led to
Communication chip 125 is crossed to send to master control system fault message.
After fault recovery, communication module 260 sends the signal for characterization failure releasing to master control system, and master control system connects
Failure reset order to communication module 260 is sent after receiving the signal.The failure reset order is forwarded to event by communication module 260
Barrier processing module 230, after fault processing module 230 receives the failure reset order, sends and is lifted a blockade PWM arteries and veins for instruction
The signal of punching is to PWM control modules 210.Meanwhile, communication module 260 is issued outputs order to control module 250 is outputed, and outputs control
Chip drives signal and output order are sent to digital output chip 127 by molding block 250, to close the open circuit of AC
Device.
It should be noted that communication module 260 can be fiber optic telecommunications module, bluetooth module, WIFI module, infrared module
In any one.In actual applications, generally, it is fiber optic communication using optimal communication mode, it has reliable, anti-interference
Property the advantage such as strong, while the synchronism between significantly enhancing power cell.
Below to foregoing PWM control modules, AD control modules, fault processing module, open into control module, output control mould
Block and communication module (by taking fiber optic telecommunications module as an example) are described in detail respectively.
(1) fault processing module
Fault processing module read hardware circuit protection circuit signal, send into internal logic, it is filtered after, failure judgement
Grade.After failure judgement is effective, the fault message comprising fault level and fault-signal is uploaded to while block pwm pulse
The CPU of master control system.Wherein, fault-signal may include AC overcurrent, exchange overvoltage, direct current excessively stream, DC over-voltage, IGBT temperature
Protection and reactor temperature protection signal.
(2) PWM control modules
PWM control modules by export one group of cycle fix, the waveform of variable duty ratio, control power cell work.It is main
The digital signal processor (DSP) of control system can be by way of configuration register to the corresponding power cell of any power cell
PWM control modules in controller are configured, configuration information include PWM startup/stoppings, PWM cycle, three-phase dutycycle, when
Base counter values, Dead Time enable/forbid/Dead Time etc..
The need for due to control algolithm, the PWM outputs of multiple power cells of carry are needed under the CPU of same master control system
It is synchronous.Synchronously mean that the PWM clocks of each power cell are synchronized with the clock during optical fiber passes down signal；Master control system
CPU updates dutycycle instruction in multiple PWM that synchronization is issued, and should simultaneously be performed by multiple power cells, and different
Power cell between PWM hopping edges time difference be not more than 100ns, and error not with accumulated time.
(3) AD control modules
AD control modules realize the control to this AD sampling A/D chip and read A/D transformation results.Wherein, the collection of analog quantity
Including DC input voitage, direct current input current, alternating voltage, alternating current.
(4) open into control module and output control module
There are 16 railway digital amounts to be input on the power cell controller, 8 railway digital amounts are exported, for controlling ancillary equipment to count
Word amount is input into chip and digital quantity pio chip.Digital quantity input chip has compatible SPI interface, and data flow is parallel input string
Row output.Open and only need to issue timing instructions into control module, digital quantity input chip can export serial data to holding into control
Module.And data will be read in be converted to parallel data, and after carrying out digital filtering, timing uploads the CPU of master control system.And according to
Send instructions under the CPU of master control system and update the level of digital output.
Digital output chip also has serial line interface, and outputing control module needs that the sequential of order and chip will be outputed
Instruction is issued to the serial ports of chip, and the digital output chip then can export correct level in output end.Initial power-on with
And during failure, all output levels shut down moment state all in acquiescence.
(5) fiber optic telecommunications module
Because there is synchronous requirement, power cell in each power cell controller of carry under same master control system CPU
Controller should from the CPU transmitting order to lower levels of master control system recovered clock, and it is at least applied to PWM control modules when
Clock is exported.Power cell controller starts A/D conversions after each PWM interruptions, and each A/D converts rear actively to master control system
The data that the CPU of system uploads A/D transformation results, the state of digital input amount and other status informations (need to be converted in A/D
Upload above-mentioned data immediately after).The CPU of master control system periodically issues control command, PWM duty cycle, digital output instruction
Etc. information.Power cell controller transmits data once every half PWM cycle to the CPU of master control system.
Fibre Optical Communication Technology is such as used, power cell controller can be used the hair of a receipts one with the communication of the CPU of master control system
Two optical fiber are realized.50M fiber optic telecommunications modules, signal frequency 24MHz can be used.Additionally, there is broken string to examine for fiber data transmitting-receiving
The function such as automatic block PWM outputs under survey, data check, erroneous retransmissions, malfunction.
Preferably, the power cell controller 121 can be field programmable gate array FPGA or complex programmable
Logic device (CPLD), but not limited to this.
In actual applications, by taking FPGA as an example, the hardware package such as hardware over-voltage, excessively stream, IGBT excess temperatures of Modularized current transformer
Shield signal is directly connected with FPGA pins.The CPU of master control system is needed not move through, is directly completed by FPGA internal hardwares logic
The function that pulse blocking and fault message are uploaded, there is provided effectively reliable hardware protection.Additionally, the present embodiment is not to FPGA
And the model of CPLD is specifically limited.
It should be noted that the application is the conventional treatment function of make use of FPGA or CPLD, the core of the application exists
In the whole frame that multiple power cells and the multiple power cell control devices connected one to one with multiple power cells are constituted
Frame structure inside structure, and power cell control device.
Thus, the Modularized current transformer of the utility model embodiment, also has the following technical effect that：
On the one hand, power cell controller by PWM control modules, AD control modules, fault processing module, open into control mould
Block, control module and communication module composition are outputed, and peripheral circuit and chip (such as IGBT drive circuit, fault comprehensive circuit, AD
Sampling A/D chip) it is joined directly together with modules in power cell controller, complete pwm pulse driving, error protection, input and output
Signal transacting and with master cpu complete optical fiber communication function, thus, be integrated with the control function of various peripheral circuits.So as to
The resource of master control system has been saved, system real time has been improve.
On the other hand, in the present embodiment, can be using such as fiber optic communication, bluetooth, WIFI communications.So that
The flexibility of Modularized current transformer communication with the outside world is stronger.Anti-interference is improve in particular by fiber optic telecommunications module, also,
Significantly enhance the synchronism between power cell.
Another further aspect, power cell controller is realized by FPGA or CPLD, especially when failure occurs, FPGA without
The CPU of master control system is crossed, the very first time actively performs protection act, and locking pulse disconnects AC-DC switch.So as to be further
Power cell provides comprehensive, quick, reliable defencive function.
The above, specific embodiment only of the present utility model, but protection domain of the present utility model do not limit to
In this, any one skilled in the art can readily occur in change in the technical scope that the utility model is disclosed
Or replace, should all cover within protection domain of the present utility model.Therefore, protection domain of the present utility model should be with the power
The protection domain that profit is required is defined.
Claims (8)
1. a kind of Modularized current transformer, including multiple power cells, it is characterised in that also include：With the multiple power cell
The multiple power cell control devices for connecting one to one；
The power cell control device includes power cell controller, IGBT drive circuit, fault comprehensive circuit, AD sampling cores
Piece, communication chip, digital quantity input chip and digital quantity pio chip, and be connected with the power cell controller respectively.
2. Modularized current transformer according to claim 1, it is characterised in that the power cell controller includes：PWM is controlled
Molding block, AD control modules, fault processing module, open into control module, output control module and communication module；
The PWM control modules are connected with the fault processing module, the AD control modules and the communication module respectively,
The AD control modules, the fault processing module, described opening are led to described respectively into control module, the control module of outputing
Letter module is connected.
3. Modularized current transformer according to claim 2, it is characterised in that the PWM control modules are driven with the IGBT
Dynamic circuit is connected, and the AD control modules are connected with the AD sampling A/D chips, the fault processing module and the failure
Synthetic circuit is connected, it is described open into control module and the digital quantity input chip be connected, it is described output control module with
The digital output chip is connected, and the communication module is connected with the communication chip.
4. Modularized current transformer according to claim 3, it is characterised in that the PWM module receives the communication module
The duty cycle data for issuing, and pwm pulse to the IGBT drive circuit is exported according to the duty cycle data.
5. Modularized current transformer according to claim 3, it is characterised in that the fault processing module is from the institute for receiving
Fault message is obtained in the fault-signal for stating the transmission of fault comprehensive circuit, and fault message is uploaded to communication module.
6. the Modularized current transformer according to any one of claim 2-5, it is characterised in that the communication module is optical fiber
Any one in communication module, bluetooth module, WIFI module, infrared module.
7. the Modularized current transformer according to any one of claim 1-3, it is characterised in that the power cell controller
It is field programmable gate array FPGA or complex programmable logic device (CPLD).
8. the Modularized current transformer according to any one of claim 1-3, it is characterised in that the Modularized current transformer is
Modular photovoltaic inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621291453.5U CN206226299U (en) | 2016-11-28 | 2016-11-28 | Modularized current transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621291453.5U CN206226299U (en) | 2016-11-28 | 2016-11-28 | Modularized current transformer |
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| Publication Number | Publication Date |
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| CN206226299U true CN206226299U (en) | 2017-06-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110768292A (en) * | 2019-10-25 | 2020-02-07 | 深圳市禾望电气股份有限公司 | Wind power converter redundancy control method and wind power converter using same |
-
2016
- 2016-11-28 CN CN201621291453.5U patent/CN206226299U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110768292A (en) * | 2019-10-25 | 2020-02-07 | 深圳市禾望电气股份有限公司 | Wind power converter redundancy control method and wind power converter using same |
| CN110768292B (en) * | 2019-10-25 | 2023-11-21 | 深圳市禾望电气股份有限公司 | Redundancy control method for wind power converter and wind power converter using same |
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