CN206004521U - A kind of T-shaped three level parallels inverter control system - Google Patents
A kind of T-shaped three level parallels inverter control system Download PDFInfo
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- CN206004521U CN206004521U CN201621047130.1U CN201621047130U CN206004521U CN 206004521 U CN206004521 U CN 206004521U CN 201621047130 U CN201621047130 U CN 201621047130U CN 206004521 U CN206004521 U CN 206004521U
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Abstract
The utility model provides a kind of T-shaped three level parallels inverter control system, makes full use of single DSP and CPLD resource.It includes DSP unit, CPLD unit, signal sampling unit, hardware detection and protection location, interface unit, drives processing unit, touch-screen; wherein; CPLD unit simulates triangle carrier signal first; dutycycle is driven to be compared each 6 road PWM drive signal of 3 modules of generation by the PWM passed back with DSP unit, correspondence passes to driving processing unit；The amplification for driving processing unit to carry out PWM drive signal, isolation, dead band are processed, and are obtained 3 Zu Ge, 12 road PWM drive signal output to corresponding module IGBT unit, are completed the driving to three module IGBT.The utility model is completed the output control of 18 road in parallel PWM drive signal, takes full advantage of resources of chip, saved system cost using the control system of list DSP+CPLD.
Description
Technical field
The utility model belongs to field of photovoltaic technology, is related to inverter control, and in particular to a kind of T-shaped three level parallel is inverse
Become device control system.
Background technology
Inverter is the equipment for the direct current energy of solar panel being converted to AC energy.In grid-connected inverters control
In system, in the market high-power three-level IGBT of the drive-type power semiconductor IGBT manufacturer production of main flow with
Based on 400A and 600A, wherein T-shaped three level IGBT area coverage is wider, more using client.And under prior art conditions,
170kW or so can only be accomplished using the IGBT of 600A designing inverter, but domestic market is based on power station, great majority are equipped with
It is the inverter of 500kW power grade, so 3 170kW modules in parallel constitute the scheme of 500kW, and to become three level Large Powers inverse
Become the main flow of device design.And two original Level Control System generally adopt dsp processor chip+CPLD Programmable logical controller
Device mode is controlled, and IGBT drive signal is produced by the EPWM module of DSP, is asked without any used in two level system
Topic.But IGBT quantity of three level system not only per phase brachium pontis is double, and the module of parallel connection also increases, and is carried out using single DSP
Control can only at most drive the IGBT of two modules, if each module uses single control system, can cause resource again
The problems such as circulation between waste and module is difficult to control to, and the real-time between each DSP is communicated and security and stability is also
One is compared stubborn problem.
Utility model content
The purpose of this utility model is to overcome above-mentioned technical problem, makes full use of the resource of single DSP and CPLD, provides one
The three level parallel system control modes of " one drags three " are planted, to solve stationary problem, the CPU of the control of many modules current and voltage feedback
Between the not high difficult problem of configured transmission real-time.Specifically technical scheme is：
A kind of T-shaped three level parallels inverter control system, including DSP unit, CPLD unit, signal sampling unit, hard
Part detection and protection location, interface unit, driving processing unit, touch-screen, it is characterised in that：
The signal sampling unit, the voltage to inverter, current signal are sampled and that sampled data is passed to DSP is mono-
Unit carries out process calculating；The DSP unit is processed and calculates required PWM driving dutycycle, and the PWM drives dutycycle transmission
To CPLD unit；While realizing the communication with touch-screen；
The CPLD unit, simulates triangle carrier signal first, drives dutycycle to enter by the PWM passed back with DSP unit
Row compares each 6 road PWM drive signal of 3 modules of generation, and correspondence passes to driving processing unit；The driving processing unit is carried out
The amplification of PWM drive signal, isolation, dead band are processed, and are obtained 3 Zu Ge, 12 road PWM drive signal output and are arrived corresponding module IGBT
Unit, completes the driving to three module IGBT；While the CPLD unit completes to pass the hardware detection with protection location
The fault-signal for returning is processed；
The hardware detection and protection location, the voltage for completing to pass signal sampling unit back, current signal carry out fault
Detection, fault-signal is passed back CPLD unit；
The interface unit, completes the control to external contactor, breaker etc., and the switch by inverter emergency stop switch
Amount signal passes CPLD unit back；While completing the collection of fault-signal and being returned to CPLD unit in time；
The touch-screen, is the human-computer dialogue window of inverter, completes to be communicated with DSP unit, is realized to inverter
The control of running status, to combined-voltage, electric current, fault message display.
Further, the CPLD unit is configured with 18 I/O interface to complete to export 3 module PWM drive signal.
Further, the touch-screen completes to be communicated with host computer.
Of the present utility model have technical effect that, the utility model using list DSP+CPLD control system, complete simultaneously
Join the output control of 18 road PWM drive signal, resources of chip is taken full advantage of, system cost has been saved, while many DSP systems of contrast
System is with bigger advantage in the control of parallel connection circulation and midpoint potential.
Description of the drawings
Fig. 1, is Control system architecture block diagram of the present utility model.
Fig. 2, is major loop block topology of the present utility model.
Specific embodiment
Below in conjunction with the accompanying drawings, embodiment of the present utility model is further described.
As shown in figure 1, being Control system architecture block diagram of the present utility model.The present embodiment with 500kW combining inverter is
Embodiment further illustrates the process of realization.DSP unit is completed outside communication and software protection function, mainly to voltage x current etc.
Sampled signal is processed, real-time tracking solar panel maximum power point, using Double closed-loop of voltage and current mode and
Space vector pulse width modulation (SVPWM) algorithm, calculating needs the dutycycle of output when first three module, and on the ring between module
Stream is controlled, and dutycycle is converted into corresponding count value, is then sent to CPLD by the data wire of DSP.And CPLD mould
Intend the function of enhancement mode pulse-width modulator peripheral hardware in DSP, configure one and the same period in consistent counting week is switched with control system
Time value, according to the duty cycle parameters that DSP unit sends, by comparing the drive waveforms for calculating output modules IGBT,
Simultaneously the fault-signal that hardware detection and protection location are passed back is processed and docking port unit is controlled.CPLD unit is total
Need altogether to configure 18 I/O ports the PWM drive signal of 3 modules is exported, then putting for signal is driven through over-drive unit
Greatly, isolation, dead band are processed, and obtain 36 tunnel signal outputs to final IGBT unit.Because same DSP is controlled to three modules
System, having saved heavier outside control system cost is in circulation and the direct current that effectively can be solved from software between module
The unbalanced problem of point current potential.
Again as shown in Fig. 2 being major loop block topology of the present utility model.The power grade is 500kW, and inside is by 3
170kW modules in parallel is formed, and the IGBT of each module is driven by the CPLD in control system.The control system control
IGBT is turned on and off, and completes the conversion of alternating current-direct current, is connected to the grid after filtering process, realizes the purpose for generating electricity.
The utility model completes the output control of 18 road in parallel PWM drive signal using the control system of list DSP+CPLD
System, takes full advantage of resources of chip, has saved system cost, while contrast multiple DSP system having in the control of parallel connection circulation
Bigger advantage.
Claims (3)
1. a kind of T-shaped three level parallels inverter control system, including DSP unit, CPLD unit, signal sampling unit, hardware
Detection and protection location, interface unit, driving processing unit, touch-screen, it is characterised in that：
The signal sampling unit, the voltage to inverter, current signal are sampled and sampled data are passed to DSP unit
Row is processed and is calculated；The DSP unit is processed and calculates required PWM driving dutycycle, and the PWM drives dutycycle to send to
CPLD unit；While realizing the communication with touch-screen；
The CPLD unit, simulates triangle carrier signal first, drives dutycycle to be compared by the PWM passed back with DSP unit
Compared with each 6 road PWM drive signal of 3 modules of generation, correspondence passes to driving processing unit；The driving processing unit carries out PWM drive
The amplification of dynamic signal, isolation, dead band are processed, and obtain 3 Zu Ge, 12 road PWM drive signal output to corresponding module IGBT unit,
Complete the driving to three module IGBT；While the CPLD unit completes the event passed back by the hardware detection and protection location
Barrier signal is processed；
The hardware detection and protection location, the voltage for completing to pass signal sampling unit back, current signal carry out fault detect,
Fault-signal is passed back CPLD unit；
The interface unit, completes the control to external contactor, breaker, and the on-off model by inverter emergency stop switch
Pass CPLD unit back；While completing the collection of fault-signal and being returned to CPLD unit in time；
The touch-screen, is the human-computer dialogue window of inverter, completes to be communicated with DSP unit, is realized to invertor operation
The control of state, to combined-voltage, electric current, fault message display.
2. the T-shaped three level parallels inverter control system of one kind as claimed in claim 1, it is characterised in that：The CPLD is mono-
Unit is configured with 18 I/O interface to complete to export 3 module PWM drive signal.
3. the T-shaped three level parallels inverter control system of one kind as claimed in claim 1 or 2, it is characterised in that：The touch
Screen completes to be communicated with host computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621047130.1U CN206004521U (en) | 2016-08-31 | 2016-08-31 | A kind of T-shaped three level parallels inverter control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621047130.1U CN206004521U (en) | 2016-08-31 | 2016-08-31 | A kind of T-shaped three level parallels inverter control system |
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| CN206004521U true CN206004521U (en) | 2017-03-08 |
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| CN201621047130.1U Active CN206004521U (en) | 2016-08-31 | 2016-08-31 | A kind of T-shaped three level parallels inverter control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108832661A (en) * | 2018-07-13 | 2018-11-16 | 华南师范大学 | A kind of grid-connected photovoltaic system of more redundancy-types |
| CN113300625A (en) * | 2021-06-08 | 2021-08-24 | 中车大连电力牵引研发中心有限公司 | Universal two-level or three-level inverter driving system |
-
2016
- 2016-08-31 CN CN201621047130.1U patent/CN206004521U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108832661A (en) * | 2018-07-13 | 2018-11-16 | 华南师范大学 | A kind of grid-connected photovoltaic system of more redundancy-types |
| CN113300625A (en) * | 2021-06-08 | 2021-08-24 | 中车大连电力牵引研发中心有限公司 | Universal two-level or three-level inverter driving system |
| CN113300625B (en) * | 2021-06-08 | 2022-07-05 | 中车大连电力牵引研发中心有限公司 | Universal two-level or three-level inverter driving system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |