CN107748289A - A kind of follow-on inverter phase detectors - Google Patents
A kind of follow-on inverter phase detectors Download PDFInfo
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- CN107748289A CN107748289A CN201711215595.2A CN201711215595A CN107748289A CN 107748289 A CN107748289 A CN 107748289A CN 201711215595 A CN201711215595 A CN 201711215595A CN 107748289 A CN107748289 A CN 107748289A
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- adder
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- 238000001914 filtration Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 description 9
- 238000012545 processing Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000819 phase cycle Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
Abstract
The invention discloses a kind of follow-on inverter phase detectors, including the first adder being sequentially connected, relay, SOGI modules and filtration module, SOGI modules include main line and feedback circuit, main line includes the second adder being sequentially connected, first multiplier, first integrator, feedback circuit includes the second integral device and the second multiplier being sequentially connected, second integral device connects the output end of first integrator, relay connects second adder, filtration module includes the 3rd adder being sequentially connected, 4th adder, 3rd multiplier, third integral device, the output end of third integral device passes through the adder of connection the 3rd, second multiplier connects second adder and the 4th adder respectively, first multiplier, second multiplier, 3rd multiplier difference input phase angle setting value.The inverter phase detectors of the present invention are improved SOGI structures, increase filtering link, harmonic wave are suppressed, reduces influence of the harmonic wave to FLL.
Description
Technical field
The present invention relates to inverter technology field, and in particular to a kind of follow-on inverter phase detectors.
Background technology
Double Second Order Generalized Integrator FLLs（DSOGI-FLL）Separation operand to positive-negative sequence is small, and can suppress harmonic wave
Component.It is under α β rest frames, each variable is carried out the phase shift of -90 degree by SOGI, is obtained further according to symmetrical component method
To positive sequence and negative phase-sequence composition and the tracking to system fundamental frequency is realized, as shown in Figure 2.In actual applications, three-phase electricity is worked as
When pressure life is uneven, power network THD values can be caused to become big, voltage contains higher harmonic components, in this case DSOGI-FLL
Just have certain delay, it is impossible to accurately quickly the phase of power network is detected, brings and has a strong impact on for control.
The content of the invention
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of follow-on inverter phase-detection
Device, includes the first adder being sequentially connected, relay, SOGI modules and filtration module, and wherein SOGI modules include master
Circuit and feedback circuit, main line include the second adder, the first multiplier, first integrator being sequentially connected, feedback circuit
Include the second integral device and the second multiplier being sequentially connected, second integral device connects the output end of first integrator, relay
Device connects second adder, and filtration module includes the 3rd adder being sequentially connected, the 4th adder, the 3rd multiplier, the
Three integrators, the output end of third integral device connect the second addition respectively by the adder of connection the 3rd, the second multiplier
Device and the 4th adder, the first multiplier, the second multiplier, the 3rd multiplier difference input phase angle setting value.
The present invention operation principle be：First adder inputs after signal to be subtracted to the output feedback signal of first integrator
To relay；Second adder subtracts the output signal of relay the output signal of the second multiplier；First multiplier is by
The output signal of two adders makees multiplication process with setting phase value；Second multiplier is by the output signal of second integral device with setting
Phase bit value does multiplication process；The output signal of the output signal of first integrator and third integral device is made to subtract by the 3rd adder
Method processing；4th adder subtracts the output signal of the output signal of the 3rd adder and the second multiplier processing；3rd
The output signal of 4th adder and setting phase value are made multiplication process by multiplier；Second integral device exports negative-sequence signals；The
Signal after three integrator outputs reason.The filter that 3rd adder, the 4th adder, the 3rd multiplier, third integral device are formed
Ripple module is filtered processing to SOGI output signal, and harmonic wave is suppressed so that phase-detection is more accurate.
The beneficial effects of the invention are as follows：The inverter phase detectors of the present invention are improved SOGI structures, are increased
Filtering link, suppresses to harmonic wave, reduces influence of the harmonic wave to FLL.
Brief description of the drawings
Fig. 1 is the schematic diagram of the present invention；
Fig. 2 is the SOGI structure charts of traditional double Second Order Generalized Integrator phaselocked loops.
Embodiment
In conjunction with accompanying drawing, the invention will be further described.
As shown in figure 1, a kind of follow-on inverter phase detectors, include be sequentially connected first adder 1, after
Electrical equipment 2, SOGI modules and filtration module 12, wherein SOGI modules include main line and feedback circuit, and main line is included successively
Connected second adder 3, the first multiplier 4, first integrator 5, feedback circuit include the second integral device 8 being sequentially connected
With the second multiplier 9, second integral device 8 connects the output end of first integrator 5, and relay 2 connects second adder 3, filtering
Module 12 includes the 3rd adder 6 being sequentially connected, the 4th adder 7, the 3rd multiplier 10, third integral device 11, and the 3rd
The output end of integrator 11 connects the 3rd adder 6, and the second multiplier 8 connects the adder 7 of second adder 3 and the 4th respectively,
First multiplier 4, the second multiplier 9, the 3rd multiplier 10 difference input phase angle setting value 14.
First adder 1 is input to relay 2 after signal 13 to be subtracted to the output feedback signal of first integrator 5；Second
Adder 3 subtracts the output signal of relay 2 output signal of second multiplier 9；First multiplier 4 is by second adder 3
Output signal with setting phase value 14 make multiplication process；Second multiplier 9 is by the output signal of second integral device 8 with setting phase
Place value 14 does multiplication process；3rd adder 6 makees the output signal of first integrator 5 and the output signal of third integral device 11
Subtraction process；4th adder 7 subtracts the output signal of the output signal of the 3rd adder 6 and the second multiplier 9 processing；
The output signal of 4th adder 7 and setting phase value 14 are made multiplication process by the 3rd multiplier 10；The output of second integral device 8 is negative
Sequential signal 16；Signal 15 after the output of third integral device 11 processing.3rd adder 6, the 4th adder 7, the 3rd multiplier 10,
The filtration module 12 that third integral device 11 is formed is filtered processing to SOGI output signal, and harmonic wave is suppressed.
Preferred embodiment of the invention described in detail above, it will be appreciated that one of ordinary skill in the art without
Creative work can is needed to make many modifications and variations according to the design of the present invention, therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical scheme, all should be in the protection domain being defined in the patent claims.
Claims (1)
1. a kind of follow-on inverter phase detectors, it is characterised in that include the first adder being sequentially connected, relay
Device, SOGI modules and filtration module, wherein SOGI modules include main line and feedback circuit, and main line includes what is be sequentially connected
Second adder, the first multiplier, first integrator, feedback circuit include the second integral device and the second multiplication being sequentially connected
Device, second integral device connect the output end of first integrator, and relay connection second adder, filtration module includes to be connected successively
The 3rd adder that connects, the 4th adder, the 3rd multiplier, third integral device, the output end of third integral device are connected by circuit
Connect the 3rd adder, the second multiplier connects second adder and the 4th adder respectively, the first multiplier, the second multiplier,
3rd multiplier difference input phase angle setting value.
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| CN201711215595.2A CN107748289A (en) | 2017-11-28 | 2017-11-28 | A kind of follow-on inverter phase detectors |
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| CN201711215595.2A CN107748289A (en) | 2017-11-28 | 2017-11-28 | A kind of follow-on inverter phase detectors |
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