CN205596093U - Three phase current synchronization pulse signal generation circuit - Google Patents
Three phase current synchronization pulse signal generation circuit Download PDFInfo
- Publication number
- CN205596093U CN205596093U CN201620398266.0U CN201620398266U CN205596093U CN 205596093 U CN205596093 U CN 205596093U CN 201620398266 U CN201620398266 U CN 201620398266U CN 205596093 U CN205596093 U CN 205596093U
- Authority
- CN
- China
- Prior art keywords
- phase
- circuit
- synchronization pulse
- amplitude limiter
- stabilivolt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 title abstract 2
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 238000004804 winding Methods 0.000 claims abstract description 8
- 239000004020 conductor Substances 0.000 claims abstract description 4
- 230000007935 neutral effect Effects 0.000 claims abstract description 4
- 230000005611 electricity Effects 0.000 claims description 8
- 208000035126 Facies Diseases 0.000 abstract 1
- 230000005693 optoelectronics Effects 0.000 abstract 1
- 238000000819 phase cycle Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000036772 blood pressure Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Control Of Electrical Variables (AREA)
Abstract
The utility model discloses a three phase current synchronization pulse signal generation circuit, include the three facies -suite formula transformers that bind by three single -phase miniwatt reducing transformer, its mid point that once inclines links to each other with 380V transmission line's neutral conductor N, high voltage winding head end that it once inclined respectively with 380V transmission line's A, B, the C phase line links to each other, the low voltage winding head end of its secondary side respectively with A looks limit circuit, B looks limit circuit, C looks limit circuit's input links to each other, a looks limit circuit, B looks limit circuit, C looks limit circuit's output links to each other with CMOS phase inverter integrated circuit's signal input part, CMOS phase inverter integrated circuit's signal output part links to each other with three optoelectronic coupler respectively. The utility model discloses can generate the three phase current synchronization pulse signal that each other does not influence between getting along with mutually.
Description
Technical field
This utility model relates to parallel network power generation technical field, more particularly, it relates to a kind of three phase mains
Synchronization pulse generative circuit.
Background technology
Three-phase power supply phase sequence is monitored in real time and misphase, open-phase protection are to ensure that photovoltaic combining inverter etc. is renewable
The energy generates electricity by way of merging two or more grid systems one of the important technology of current transformer safe and reliable operation.Obtain correct three-phase synchronous pulse
Signal is three-phase power supply phase sequence detection and misphase, the foundation of phase-lacking protective device work and premise.
Currently for 380V low-voltage network Phase sequence detection and misphase, the three-phase synchronous pulse of open-phase protection
Signal creating method, using use three-phase core type step-down transformer as three-phase synchronous transformator, to its secondary side
It is main that voltage carries out Shape correction etc. again, owing to three-phase core type transformer magnetic circuit between phase and phase is not independent,
When there is a certain phase open-phase fault, this phase secondary side still has induced voltage, and it is tired that this causes open-phase fault to judge
Difficult.
Obtain the three phase mains synchronization pulse being independent of each other between phase and phase for simplifying open-phase fault inspection
Survey, with protecting circuit designed, there is engineering practical value.
Summary of the invention
The technical problems to be solved in the utility model is, it is provided that a kind of three phase mains synchronization pulse generates
Circuit.
This utility model solves its technical problem and be the technical scheme is that a kind of three phase mains of structure synchronizes
Pulse signal generative circuit, including by single-phase low-power reducing transformer Ta, single-phase low-power reducing transformer Tb, single-phase
Small-power reducing transformer TcThe three-phase group formula transformator being coupled to, in described three-phase group formula transformator primary side
Point is connected with the neutral conductor N of 380V transmission line of electricity, the high pressure winding of described three-phase group formula transformator primary side
Head end is connected with A, B, C phase line of 380V transmission line of electricity respectively, described three-phase group formula transformer secondary
The low pressure winding head end of side respectively with A phase amplitude limiter circuit, B phase amplitude limiter circuit, the input of C phase amplitude limiter circuit
End is connected, described A phase amplitude limiter circuit, B phase amplitude limiter circuit, the outfan of C phase amplitude limiter circuit and CMOS
The signal input part of inverter circuit is connected, the signal output of described CMOS inverter integrated circuit
End is connected with three photoelectrical couplers respectively, and described A phase amplitude limiter circuit is by current-limiting resistance RaWith stabilivolt VDa
Being composed in series, described B phase amplitude limiter circuit is by current-limiting resistance RbWith stabilivolt VDbIt is composed in series, described C
Phase amplitude limiter circuit is by current-limiting resistance RcWith stabilivolt VDcIt is composed in series.
In such scheme, described single-phase low-power reducing transformer Ta, single-phase low-power reducing transformer Tb, single-phase
Small-power reducing transformer TcBe all voltage ratio be 220V/12V, power be the single-phase low-power transformator of 3-5W.
In such scheme, described current-limiting resistance Ra, current-limiting resistance Rb, current-limiting resistance RcResistance value equal
For 2.2k Ω.
In such scheme, described stabilivolt VDa, stabilivolt VDb, stabilivolt VDcBurning voltage
For 3.3V, power is 0.5W.
In such scheme, described CMOS inverter integrated circuit is CMOS hex inverter CD4069.
In such scheme, the model of described photoelectrical coupler is TLP521-1.
Implement this utility model one three phase mains synchronization pulse generative circuit, there is following useful effect
Really:
This utility model uses single-phase low-power transformator cheap, widely used, is equipped with the most discrete
Components and parts and photoelectrical coupler, inverter circuit, it is possible to generate the three-phase being independent of each other between phase and phase
Line lock pulse signal.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the schematic diagram of a kind of three phase mains synchronization pulse generative circuit.
Detailed description of the invention
In order to technical characteristic of the present utility model, purpose and effect are more clearly understood from, now compare attached
Figure describes detailed description of the invention of the present utility model in detail.
As it is shown in figure 1, this utility model one three phase mains synchronization pulse generative circuit, including by list
Phase small-power reducing transformer Ta, single-phase low-power reducing transformer Tb, single-phase low-power reducing transformer TcThree be coupled to
Group formula transformator, single-phase low-power reducing transformer T mutuallya, single-phase low-power reducing transformer Tb, single-phase low-power fall
Depressor TcBe all voltage ratio be 220V/12V, power be the single-phase low-power transformator of 3-5W.Three-phase group
The midpoint of formula transformator primary side is connected with the neutral conductor N of 380V transmission line of electricity, three-phase group formula transformator one
The high pressure winding head end of secondary side is connected with A, B, C phase line of 380V transmission line of electricity respectively, three-phase group formula
The low pressure winding head end of Circuit Fault on Secondary Transformer respectively with A phase amplitude limiter circuit, B phase amplitude limiter circuit, C phase amplitude limit
The input of circuit is connected.A phase amplitude limiter circuit, B phase amplitude limiter circuit, C phase amplitude limiter circuit outfan with
The signal input part of CMOS inverter integrated circuit is connected, and CMOS inverter integrated circuit is CMOS
Hex inverter CD4069, the signal output part of CMOS inverter integrated circuit with three models is respectively
The photoelectrical coupler of TLP521-1 is connected.Wherein, A phase amplitude limiter circuit is by current-limiting resistance RaAnd stabilivolt
VDaBeing composed in series, B phase amplitude limiter circuit is by current-limiting resistance RbWith stabilivolt VDbBeing composed in series, C phase limits
Width circuit is by current-limiting resistance RcWith stabilivolt VDcIt is composed in series, current-limiting resistance Ra, current-limiting resistance Rb, limit
Leakage resistance RcResistance value be 2.2k Ω；Stabilivolt VDa, stabilivolt VDb, stabilivolt VDcSteady
Determining voltage is 3.3V, and power is 0.5W.
Utility model works principle is as follows: A, B, C three-phase mains voltage first passes through three-phase group formula transformation
Device carries out blood pressure lowering, then carries out respectively through A phase amplitude limiter circuit, B phase amplitude limiter circuit, C phase amplitude limiter circuit
After amplitude limiting processing, obtain the pulsating volage corresponding with A, B, C three-phase mains voltage, by this pulsating volage
Respectively through output after twice anti-phase shaping of CMOS hex inverter CD4069 and A, B, C three phase mains
The synchronization pulse that voltage is corresponding, by this synchronization pulse again respectively through photoelectrical coupler
TLP521-1 homophase output three-phase synchronous pulse signal Ua, Ub, Uc, for follow-up Phase sequence detection and phase shortage,
Misphase fault alarm is used with protection circuit.
Above in conjunction with accompanying drawing, embodiment of the present utility model is described, but this utility model not office
Being limited to above-mentioned detailed description of the invention, above-mentioned detailed description of the invention is only schematically rather than to limit
Property, those of ordinary skill in the art is under enlightenment of the present utility model, without departing from this utility model ancestor
In the case of purport and scope of the claimed protection, it may also be made that a lot of form, it is new that these belong to this practicality
Within the protection of type.
Claims (6)
1. a three phase mains synchronization pulse generative circuit, it is characterised in that include by single-phase little merit
Rate reducing transformer Ta, single-phase low-power reducing transformer Tb, single-phase low-power reducing transformer TcThe three-phase group formula being coupled to
Transformator, the midpoint of described three-phase group formula transformator primary side is connected with the neutral conductor N of 380V transmission line of electricity,
The high pressure winding head end of described three-phase group formula transformator primary side respectively with A, B, C of 380V transmission line of electricity
Phase line be connected, the low pressure winding head end of described three-phase group formula Circuit Fault on Secondary Transformer respectively with A phase amplitude limiter circuit,
B phase amplitude limiter circuit, the input of C phase amplitude limiter circuit are connected, described A phase amplitude limiter circuit, B phase amplitude limit electricity
Road, the outfan of C phase amplitude limiter circuit are connected with the signal input part of CMOS inverter integrated circuit, institute
The signal output part stating CMOS inverter integrated circuit is connected with three photoelectrical couplers respectively, described A
Phase amplitude limiter circuit is by current-limiting resistance RaWith stabilivolt VDaBeing composed in series, described B phase amplitude limiter circuit is by current limliting
Resistance RbWith stabilivolt VDbBeing composed in series, described C phase amplitude limiter circuit is by current-limiting resistance RcAnd stabilivolt
VDcIt is composed in series.
A kind of three phase mains synchronization pulse generative circuit the most according to claim 1, its feature
It is, described single-phase low-power reducing transformer Ta, single-phase low-power reducing transformer Tb, single-phase low-power reducing transformer
TcBe all voltage ratio be 220V/12V, power be the single-phase low-power transformator of 3-5W.
A kind of three phase mains synchronization pulse generative circuit the most according to claim 1, its feature
It is, described current-limiting resistance Ra, current-limiting resistance Rb, current-limiting resistance RcResistance value be 2.2k Ω.
A kind of three phase mains synchronization pulse generative circuit the most according to claim 1, its feature
It is, described stabilivolt VDa, stabilivolt VDb, stabilivolt VDcBurning voltage be 3.3V, power
For 0.5W.
A kind of three phase mains synchronization pulse generative circuit the most according to claim 1, its feature
Being, described CMOS inverter integrated circuit is CMOS hex inverter CD4069.
A kind of three phase mains synchronization pulse generative circuit the most according to claim 1, its feature
Being, the model of described photoelectrical coupler is TLP521-1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620398266.0U CN205596093U (en) | 2016-05-05 | 2016-05-05 | Three phase current synchronization pulse signal generation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620398266.0U CN205596093U (en) | 2016-05-05 | 2016-05-05 | Three phase current synchronization pulse signal generation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205596093U true CN205596093U (en) | 2016-09-21 |
Family
ID=56933969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620398266.0U Active CN205596093U (en) | 2016-05-05 | 2016-05-05 | Three phase current synchronization pulse signal generation circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205596093U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106598896A (en) * | 2016-12-01 | 2017-04-26 | 成都凯天电子股份有限公司 | Pulse amplitude limiting conversion circuit |
| CN108233528A (en) * | 2016-12-14 | 2018-06-29 | 华为技术有限公司 | A kind of power input control device |
| CN112487742A (en) * | 2020-10-27 | 2021-03-12 | 云南电网有限责任公司临沧供电局 | Transformer modeling method suitable for pulse signal injection at low-voltage side of distribution transformer |
-
2016
- 2016-05-05 CN CN201620398266.0U patent/CN205596093U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106598896A (en) * | 2016-12-01 | 2017-04-26 | 成都凯天电子股份有限公司 | Pulse amplitude limiting conversion circuit |
| CN108233528A (en) * | 2016-12-14 | 2018-06-29 | 华为技术有限公司 | A kind of power input control device |
| CN108233528B (en) * | 2016-12-14 | 2021-10-01 | 华为技术有限公司 | Power input control device |
| CN112487742A (en) * | 2020-10-27 | 2021-03-12 | 云南电网有限责任公司临沧供电局 | Transformer modeling method suitable for pulse signal injection at low-voltage side of distribution transformer |
| CN112487742B (en) * | 2020-10-27 | 2022-11-08 | 云南电网有限责任公司临沧供电局 | Transformer modeling method suitable for pulse signal injection of low-voltage side of distribution transformer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103645404B (en) | A kind of micro-grid island detection method and detection system | |
| CN102412591B (en) | Island detection method based on negative sequence power positive feedback | |
| CN105445546B (en) | A kind of intelligent acess formula electric energy meter with harmonic detection function | |
| CN205596093U (en) | Three phase current synchronization pulse signal generation circuit | |
| CN103199526A (en) | Short circuit power frequency electrical quantity calculating method for power system comprising doubly-fed induction generator | |
| CN104698396A (en) | Fault characteristic analyzing method for grid-connected inverter type distributed power supply | |
| CN108429472B (en) | A kind of self-starting of power generation with marine energy and self-powered energy collection circuit | |
| CN102842919B (en) | Flexible control method for photovoltaic grid-connected power generating system | |
| CN103326385A (en) | Pulverized coal feeder frequency converter control system with low voltage ride-through power supply device | |
| Chen et al. | Magnetizing Inrush Current Elimination Strategy Based on a Parallel Type Asynchronous Closing Hybrid Transformer | |
| CN104133099A (en) | Detection device and method for residual current of photovoltaic array | |
| Li et al. | Islanding detection method for PV grid-connected inverter based on dynamic reactive power disturbance | |
| CN108988392B (en) | Power distribution network self-adaptive low-voltage anti-island method based on back-to-back converter | |
| CN103954870B (en) | The island detection method that a kind of series resonance combines with phase hit | |
| CN106100103A (en) | A kind of emergency power system with shunt regulator | |
| CN203859497U (en) | Anti-open phase, anti-over voltage, and anti-interference automatic protector for motor | |
| Tang et al. | A novel directional relay applicable to power system with wind farms | |
| CN202503279U (en) | Direct current limiting device for neutral point of main transformer | |
| CN203368041U (en) | Device in on-line detection self-excitation type MCR for performing excitation control on state of thyristor | |
| CN104155576B (en) | Island detection method based on shunt principle | |
| CN205657585U (en) | Protection circuit to induction heating power direct current major loop | |
| CN103743976A (en) | Side-frequency harmonic current disturbance island detection method | |
| CN104678860A (en) | CPLD-based protection relay in AC and open-phase protection system | |
| Yao et al. | Islanding detection for PV plant using instantaneous power theory | |
| CN204886776U (en) | Asynchronous motor underloading energy -saving control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |