CN207705801U - A kind of BOOST single-phase grid-connected inverters - Google Patents
A kind of BOOST single-phase grid-connected inverters Download PDFInfo
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- CN207705801U CN207705801U CN201721465295.5U CN201721465295U CN207705801U CN 207705801 U CN207705801 U CN 207705801U CN 201721465295 U CN201721465295 U CN 201721465295U CN 207705801 U CN207705801 U CN 207705801U
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Abstract
The utility model is related to a kind of BOOST single-phase grid-connected inverters, main circuit includes auxiliary power module and sequentially connected BOOST booster circuits, input filter module, single-phase inversion module, output filter module；Control circuit includes control module, pulse generating module, Current Voltage detection module, differential comparison module one and differential comparison module two, and Current Voltage detection module is connected with control module, output filter module and auxiliary power module respectively；Current Voltage detection module is sequentially connected with control module, pulse generating module and single-phase inversion module；Output filter module is sequentially connected with differential comparison module one and control module；Power grid is sequentially connected with differential comparison module two and control module.The utility model realizes a kind of BOOST single-phase grid-connected inverters, and system output stability is good, has overcurrent and overvoltage protection, and synchronism is strong, it can be achieved that phase, frequency and amplitude to power grid carry out high-precision tracking.
Description
Technical field
The utility model belongs to generating equipment technical field, is related to a kind of inverter, and especially a kind of BOOST is single-phase simultaneously
Net inverter.
Background technology
Gird-connected inverter is generally divided into photovoltaic power generation grid-connected inverter, wind power-generating grid-connected inverter, power-equipment power generation
Gird-connected inverter and other power generation gird-connected inverters.Major part single-phase grid-connected inverter, which is all made of, at present is directly incorporated into
The mode of power grid, is susceptible to that grid-connected harmonic current is big and grid-connected moment will produce great grid-connected instantaneous electricity using which
Stream, be easy to cause inverter module internal power pipe and diode impact failure, filter capacitor damage in addition cause control module or
Auxiliary power module cisco unity malfunction prevents device from stablizing, is grid-connectedly safe.Meanwhile gird-connected inverter requires inverter
For the grid-connected voltage of output strictly with network voltage with the same phase of frequency, inverter output voltage waveform is sine wave, total harmonic distortion factor
THD is less than 5%, and each harmonic is less than 3%, and to not pollute power grid, but most of gird-connected inverter cannot strictly reach at present
It is required that therefore there are security risks.
Currently, there is protection circuit and the small single-phase grid-connected inverter of the distortion factor there is an urgent need to a kind of in the market.
Utility model content
The purpose of this utility model is that for the gird-connected inverter described in background technology, one is provided
The single-phase inverter that kind is efficient, high safety, stability is good, the distortion factor is small.
Technical solution used by the utility model is：
A kind of BOOST single-phase grid-connected inverters, including main circuit and control circuit, the main circuit include BOOST boostings
Circuit, input filter module, single-phase inversion module, output filter module and auxiliary power module, the BOOST booster circuits with
Input filter module, single-phase inversion module, output filter module are sequentially connected；The control circuit includes control module, pulse
Module, Current Voltage detection module, differential comparison module one and differential comparison module two, the Current Voltage detection module occurs
It is connected respectively with control module, output filter module and auxiliary power module；The Current Voltage detection module and control mould
Block, pulse generating module and single-phase inversion module are sequentially connected；The output filter module and differential comparison module one and control
Module is sequentially connected；The power grid is sequentially connected with differential comparison module two and control module, the output filter module and electricity
Net connection.
Wherein, the control module is made of receiving module, protection module, PID adjustment modules and tracing module；Wherein,
The receiving module is connect with Current Voltage detection module, protection module and tracing module respectively；The PID adjustment modules difference
It is connected with pulse generating module and tracing module.
Wherein, the BOOST booster circuits use model UC3843 chips, have the function of self-stabilization.
Wherein, the input filter module is made of large capacity filter capacitor；
The LC filter circuits that the output filter module is made of E types inductance and filter capacitor.
Wherein, the single-phase inversion module use the topological structure based on half-bridge structure, including N-channel MOS power component,
Power component driving circuit and light-coupled isolation device, the SPWM pulses sent from the pulse generating module are through light-coupled isolation
After device isolation, the input terminal of ingoing power element driving circuit, from the output end output drive signal of power component driving circuit
Break-make for controlling N-channel MOS power component.
Wherein, the model IRF540 of the N-channel MOS power component has the advantages that low conduction impedance and efficient；
The half-bridge circuit that the power component driving circuit is made of IRS21867, has the characteristics that conversion rate is fast.
Wherein, the alternating current detection module in the Current Voltage detection module by current transformer TA1015-2 and its
Sampling loop forms, the alternating voltage detection module in the Current Voltage detection module by voltage transformer TV1013-1H and
Its sampling loop forms, and the high current in detected circuit and big voltage signal can be converted to corresponding small voltage signal, realizes
Current-voltage sampling.
Wherein, the receiving module that the control module includes is a serial defeated using model TLC3578 chips
Go out, 14/12 AD conversion chip of bipolarity in 8 channels has the characteristics that low in energy consumption, sample rate is high, can detect Current Voltage
The analog signal of module is converted to digital signal, obtains the instantaneous value of electric current and voltage；
The main control chip of the control circuit is using the TM4C123G micro-controls based on ARM Cortex-M4F
Device processed is as central processing unit.
Wherein, the direct current signal of input can be carried out the conversion of specified DC voltage by the auxiliary power module, be electric current
Voltage detection module, single-phase inversion module, control module, pulse generating module provide operating voltage.
Wherein, the differential comparison module one and differential comparison module two use the differential comparison of model LM2903 two-ways
Device, sine wave export cycle phase with, the identical bipolar square wave of phase after differential comparator.
The beneficial effects of the utility model are：
A kind of BOOST single-phase grid-connected inverters described in the utility model using BOOST topological structures and are based on half-bridge
The topological structure of structure.Low dc voltage signal can be upgraded to High Level DC Voltage signal by BOOST booster circuits, and inversion is made to export
Voltage amplitude increases, to reach grid-connected requirement；Direct current signal can be converted to exchange by single-phase inversion module using half-bridge circuit
Signal；Protection module can be protected by the break-make of the analysis controling circuit to acquiring signal to carry out overcurrent and overvoltage protection
The safety of card system；PID adjustment modules can pass through information that Current Voltage detection module and tracing module obtain and default mesh
Scale value is compared, and is intended to desired value and is adjusted, the stability of safeguards system；Tracing module can be to the differential comparison of two-way
The signal of device output is compared, and is collected simultaneously the information of Current Voltage detection module, control pulse generating module is to complete
The tracking of phase, frequency and amplitude.It is single-phase that the utility model provides the good BOOST of a kind of simple in structure, stability, safety
Gird-connected inverter.
Description of the drawings
Fig. 1：The structural schematic diagram of the utility model.
Fig. 2：The schematic diagram of the BOOST voltage booster circuit topological structures of the utility model.
Specific implementation mode
The utility model is described further below in conjunction with attached drawing.
As shown in Fig. 2, it is N-channel MOS power member that the utility model, which uses the booster circuit of BOOST topological structures, wherein S,
Part controls its working condition by drive pulse signal, can be equivalent to a switch.C is output filter capacitor, for ensureing output
The stabilization of voltage.When switch conduction, energy inputs inductance L from input terminal VI by switch by is not delivered to output end VO；Switch
When shutdown, the energy of inductance L storages passes to output end VO by diode Vd, while input terminal VI also gives load R to provide energy
Amount.Output voltage can be improved by principles above, has the function that boosting, the effect of boosting depend on N-channel MOS power member
The duty ratio of the drive pulse signal of part S.
As depicted in figs. 1 and 2, the utility model is related to a kind of BOOST single-phase grid-connected inverters, including main circuit and control
Circuit, the main circuit include BOOST booster circuits, input filter module, single-phase inversion module, output filter module and auxiliary
Power module, BOOST booster circuits are sequentially connected with input filter module, single-phase inversion module, output filter module；The control
Circuit processed includes control module, pulse generating module, Current Voltage detection module, differential comparison module one and differential comparison module
Two, Current Voltage detection module is connected with control module, output filter module and auxiliary power module respectively；Current Voltage is examined
Module is surveyed to be sequentially connected with control module, pulse generating module and single-phase inversion module；Output filter module mould compared with differential
Block one and control module are sequentially connected；Power grid is sequentially connected with differential comparison module two and control module, output filter module with
Power grid connects.
Wherein, the control module is made of receiving module, protection module, PID adjustment modules and tracing module；Receive mould
Block is connect with Current Voltage detection module, protection module and tracing module respectively；PID adjustment modules respectively with pulse generating module
It is connected with tracing module.
Wherein, the BOOST booster circuits use the UC3843 chips of TI companies production, have the function of self-stabilization, can incite somebody to action
Low dc voltage signal is upgraded to High Level DC Voltage signal, so that the voltage amplitude that inversion exports is increased, to reach grid-connected requirement.
Wherein, the input filter module is made of large capacity filter capacitor, can filter off the noise of direct current signal.
Wherein, the LC filter circuits that the output filter module is made of E types inductance and filter capacitor, can filter off single-phase
The harmonic component of inverter module output signal, it is the small sine wave of the distortion factor to make output waveform.
Wherein, the protection module that the control module includes can monitor electric current, the voltage in circuit in real time, can be real
Existing overcurrent and overvoltage protection, have the function that system protection.PID adjustment modules can be according to Current Voltage detection module and tracking mould
The collected signal of block is compared with predetermined target value, and controls pulse generating module it is made to be intended to desired value and adjusted
Section, the stability of safeguards system.The signal that tracing module can export the differential comparison module of two-way is compared, and is collected simultaneously electricity
The information of voltage detection module is flowed, control pulse generating module makes output signal chase after the phase, frequency and amplitude of power grid
Track.
Wherein, the single-phase inversion module includes N-channel MOS power component, power component driving circuit and light-coupled isolation
Device, the SPWM pulses sent from pulse generating module are after optical coupling isolator is isolated, ingoing power element driving circuit
Input terminal, be used to control the logical of N-channel MOS power component from the output end output drive signal of power component driving circuit
It is disconnected.
Wherein, the model IRF540 of the N-channel MOS power component has the advantages that low conduction impedance and efficient.
The half-bridge circuit that the power component driving circuit is made of IRS21867, has the characteristics that conversion rate is fast.Wherein, the list
Phases inversion module uses the topological structure based on half-bridge structure, under the control of two-way bipolar SPWM wave, realizes single-phase inversion
Output can adjust the frequency and amplitude of output voltage by changing SPWM wave modulations wave frequency rate and modulation degree.
Wherein, the alternating current detection module in the Current Voltage detection module by current transformer TA1015-2 and its
Sampling loop forms, the alternating voltage detection module in the Current Voltage detection module by voltage transformer TV1013-1H and
Its sampling loop forms, and can the high current in detected circuit and big voltage signal be converted to corresponding small voltage signal, and pass
The receiving module into control module is sent, to realize the sampling of electric current and voltage.
Wherein, the TLC3578 chips that the receiving module that the control module includes is produced by TI companies are constituted, and are a strings
Row output, 14/12 AD conversion chip of bipolarity in 8 channels have the characteristics that low in energy consumption, sample rate is high, can be by Current Voltage
The analog signal of detection module is converted to digital signal, obtains the instantaneous value of electric current and voltage.
Wherein, the direct current signal of input can be carried out the conversion of specified DC voltage by the auxiliary power module, be electric current
Voltage detection module, single-phase inversion module, control module, pulse generating module provide operating voltage.
Wherein, the main control chip of the control circuit using TI companies production based on ARM Cortex-M4F's
TM4C123G microcontrollers have the characteristics that small power consumption, structure are small and control ability is strong, meet this list as central processing unit
The whole of phase gird-connected inverter require.
Wherein, the differential comparison module one and differential comparison module two are differential using the LM2903 two-ways of TI companies production
Comparator, sine wave export cycle phase with, the identical bipolar square wave of phase after differential comparator.
It should be noted that each module used by the utility model is available circuit module.
The utility model realizes a kind of BOOST single-phase grid-connected inverters.It has the advantage that：System output stability is good,
Load regulation is less than 1%；Total harmonic distortion factor THD is less than 2%, and each harmonic is less than 1%；Security of system is good, have overcurrent and
Overvoltage protection；Synchronism is strong, it can be achieved that phase, frequency and amplitude to power grid carry out high-precision tracking.
The above is only the preferred embodiment to the utility model, is not defined to the scope of the utility model,
Therefore under the premise of not departing from the spirit of the design of the utility model, this field ordinary engineering and technical personnel is to described in the utility model
The equivalence changes or decoration that structure, feature and principle is made, should all fall into the protection domain of present utility model application patent.
Claims (10)
1. a kind of BOOST single-phase grid-connected inverters, which is characterized in that including main circuit and control circuit, the main circuit includes
BOOST booster circuits, input filter module, single-phase inversion module, output filter module and auxiliary power module, the BOOST
Booster circuit is sequentially connected with input filter module, single-phase inversion module, output filter module；The control circuit includes control
Module, pulse generating module, Current Voltage detection module, differential comparison module one and differential comparison module two, the electric current electricity
Pressure detection module is connected with control module, output filter module and auxiliary power module respectively；The Current Voltage detects mould
Block is sequentially connected with control module, pulse generating module and single-phase inversion module；Output filter module mould compared with differential
Block one and control module are sequentially connected；Power grid is sequentially connected with differential comparison module two and control module, and the output filters mould
Block is connect with power grid.
2. a kind of BOOST single-phase grid-connected inverters according to claim 1, it is characterised in that：The control module is by connecing
Receive module, protection module, PID adjustment modules and tracing module composition；Wherein, the receiving module is detected with Current Voltage respectively
Module, protection module are connected with tracing module；The PID adjustment modules are connected with pulse generating module and tracing module respectively.
3. a kind of BOOST single-phase grid-connected inverters according to claim 1, it is characterised in that：The BOOST booster circuits
Using model UC3843 chips, has the function of self-stabilization.
4. a kind of BOOST single-phase grid-connected inverters according to claim 1, it is characterised in that：The input filter module
It is made of large capacity filter capacitor；
The LC filter circuits that the output filter module is made of E types inductance and filter capacitor.
5. a kind of BOOST single-phase grid-connected inverters according to claim 1, it is characterised in that：The single-phase inversion module
Using the topological structure based on half-bridge structure, including N-channel MOS power component, power component driving circuit and optical coupling isolator
Part, the SPWM pulses sent from the pulse generating module are after optical coupling isolator is isolated, ingoing power element driving electricity
The input terminal on road is used to control the logical of N-channel MOS power component from the output end output drive signal of power component driving circuit
It is disconnected.
6. a kind of BOOST single-phase grid-connected inverters according to claim 5, it is characterised in that：The N-channel MOS power
The model IRF540 of element has the advantages that low conduction impedance and efficient；The power component driving circuit be by
The half-bridge circuit of IRS21867 compositions, has the characteristics that conversion rate is fast.
7. a kind of BOOST single-phase grid-connected inverters according to claim 1, it is characterised in that：The Current Voltage detection
Mould alternating current detection module in the block is made of current transformer TA1015-2 and its sampling loop, the Current Voltage detection
Mould alternating voltage detection module in the block is made of voltage transformer TV1013-1H and its sampling loop, can be by detected circuit
High current and big voltage signal be converted to corresponding small voltage signal, realize current-voltage sampling.
8. a kind of BOOST single-phase grid-connected inverters according to claim 1, it is characterised in that：The control module includes
Receiving module using model TLC3578 chips, be a Serial output, 14/12 AD conversion of bipolarity in 8 channels
Chip has the characteristics that low in energy consumption, sample rate is high, can the analog signal of Current Voltage detection module be converted to digital signal,
Obtain the instantaneous value of electric current and voltage；
The main control chip of the control circuit using based onCortexTMThe TM4C123G microcontroller conducts of-M4F
Central processing unit.
9. a kind of BOOST single-phase grid-connected inverters according to claim 1, it is characterised in that：The auxiliary power module
The conversion that the direct current signal of input can be carried out to specified DC voltage is Current Voltage detection module, single-phase inversion module, control
Module, pulse generating module provide operating voltage.
10. a kind of BOOST single-phase grid-connected inverters according to claim 1, it is characterised in that：The differential comparison module
One and differential comparison module two use model LM2903 two-way differential comparators, sine wave exports the period after differential comparator
Identical, the identical bipolar square wave of phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721465295.5U CN207705801U (en) | 2017-11-03 | 2017-11-03 | A kind of BOOST single-phase grid-connected inverters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721465295.5U CN207705801U (en) | 2017-11-03 | 2017-11-03 | A kind of BOOST single-phase grid-connected inverters |
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| Publication Number | Publication Date |
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| CN207705801U true CN207705801U (en) | 2018-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721465295.5U Expired - Fee Related CN207705801U (en) | 2017-11-03 | 2017-11-03 | A kind of BOOST single-phase grid-connected inverters |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113053203A (en) * | 2021-05-10 | 2021-06-29 | 新能职业培训学校(天津)有限公司 | Low-voltage full-power converter teaching aid |
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2017
- 2017-11-03 CN CN201721465295.5U patent/CN207705801U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113053203A (en) * | 2021-05-10 | 2021-06-29 | 新能职业培训学校(天津)有限公司 | Low-voltage full-power converter teaching aid |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180807 Termination date: 20191103 |