CN107589314A - The method and system of detection before a kind of generator parallel is grid-connected - Google Patents
The method and system of detection before a kind of generator parallel is grid-connected Download PDFInfo
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- CN107589314A CN107589314A CN201710887926.0A CN201710887926A CN107589314A CN 107589314 A CN107589314 A CN 107589314A CN 201710887926 A CN201710887926 A CN 201710887926A CN 107589314 A CN107589314 A CN 107589314A
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Abstract
The present invention relates to a kind of generator parallel it is grid-connected before detection method and system, methods described, including：Generator parallel it is grid-connected switch close a floodgate before using detect circuit to generator progress phase sequence calibration；If phase sequence is consistent, a calibration is synchronized using circuit is detected.This programme is only confirmed with the phase sequence that generator can be completed once detection circuit and synchronous point is proofreaded, and simple to operate, cost is low, avoids phase sequence mistake and harm that synchronous point error tape comes.
Description
Technical field
The present invention relates to Generator test technical field, more particularly to a kind of method of generator parallel detection before grid-connected
And system.
Background technology
When more generator parallels or generator connecting in parallel with system work, the preceding tune that closes a floodgate must be carried out before generator is devoted oneself to work
Examination, will confirm that phase sequence is correct, and the synchronous point of generator synchronous control system output is accurate, and this is and machine or generated electricity by way of merging two or more grid systems
Committed step when machine is debugged, if phase sequence mistake, synchronous point inaccuracy will form phase fault, causes device damage, electricity
The failures such as net tripping operation, serious will cause personal injury.Existing debugging system is that commissioning staff is examined using phase-sequence meter
Survey, reuse standby synchronous meter and carry out proofreading control system output, such operation needs different equipment, and operates multiple
It is miscellaneous, high are required to operating personnel.
The content of the invention
Based on this, it is necessary to for generator parallel it is grid-connected before detection need different equipment, and complex operation is asked
A kind of topic, there is provided the method and system of detection before generator parallel is grid-connected.
A kind of method of detection before generator parallel is grid-connected, including：Inspection is utilized before the grid-connected switch of generator parallel closes a floodgate
Slowdown monitoring circuit carries out phase sequence calibration to generator；If phase sequence is consistent, a calibration is synchronized using circuit is detected.
Preferably, the detection circuit includes：Electric capacity, the first indicator lamp and the second indicator lamp；The electric capacity, the first instruction
The both ends of lamp and the second indicator lamp are all connected with lead.
Preferably, wrapped before the grid-connected switch of generator parallel closes a floodgate using the step of the first detection circuit progress phase sequence calibration
Include：One end of one end of electric capacity, the first indicator lamp is connected with one end of the second indicator lamp；The other end of electric capacity, first are referred to
Show the other end of lamp and the other end of the second indicator lamp be respectively connected to the generator three-phase output end A ends, B ends and C
End；Observe the state of the first indicator lamp and the second indicator lamp；If the first indicator lamp is brighter than the second indicator lamp, generator is judged simultaneously
The phase sequence of the grid-connected switch ends of machine is consistent.
Preferably, if phase sequence is consistent, included using the step of circuit synchronizes calibration is detected：Respectively by the first instruction
The both ends of lamp and the both ends of the second indicator lamp are linked into and at the alternating current both ends of the identical phase sequence of the grid-connected switch of machine；Observation first
The state of indicator lamp and the second indicator lamp；If the first indicator lamp and the second indicator lamp extinguish, the simultaneously grid-connected switch ends of machine are judged
Line lock.
Preferably, if the first indicator lamp and the/the second indicator lamp are bright, judge and the power supply of the grid-connected switch ends of machine is different
Step.
The system of detection before a kind of generator parallel is grid-connected, including：Phase sequence calibration module and synchronous point calibration module；It is described
Phase sequence calibration module, for generator parallel it is grid-connected switch close a floodgate before using detect circuit to generator progress phase sequence calibration；
The synchronous point calibration module, if consistent for phase sequence, a calibration is synchronized using circuit is detected.
Preferably, the detection circuit includes：Electric capacity, the first indicator lamp and the second indicator lamp；The electric capacity, the first instruction
The both ends of lamp and the second indicator lamp are all connected with lead.
Preferably, the phase sequence calibration module, it is additionally operable to one end of electric capacity, one end of the first indicator lamp and the second instruction
One end connection of lamp；The other end of the other end of electric capacity, the other end of the first indicator lamp and the second indicator lamp is respectively connected to
A ends, B ends and the C-terminal of the three-phase output end of the generator；Observe the state of the first indicator lamp and the second indicator lamp；If first
Indicator lamp is brighter than the second indicator lamp, then judges that the phase sequence of the grid-connected switch ends of generator parallel is consistent.
Preferably, the synchronous point calibration module, it is additionally operable to the both ends of the first indicator lamp and the second indicator lamp respectively
Both ends are linked into and at the alternating current both ends of the identical phase sequence of the grid-connected switch of machine；Observe the shape of the first indicator lamp and the second indicator lamp
State；If the first indicator lamp and the second indicator lamp extinguish, the line lock of the simultaneously grid-connected switch ends of machine is judged.
Preferably, if the first indicator lamp and the/the second indicator lamp are bright, judge and the power supply of the grid-connected switch ends of machine is different
Step.
Compared with prior art, the beneficial effects of the present invention are：
This programme generator parallel it is grid-connected switch close a floodgate before using detect circuit to generator progress phase sequence calibration；If phase sequence one
Cause, a calibration is synchronized using same detection circuit.This programme is only true with the phase sequence that generator can be completed once detection circuit
Recognize and proofreaded with synchronous point, and it is simple to operate, cost is low, avoids the harm of phase sequence mistake and synchronous point error tape.
Brief description of the drawings
Fig. 1 is the indicative flowchart of the method for the grid-connected preceding detection of the generator parallel of an embodiment.
Fig. 2 is the schematic circuit of the detection circuit of Fig. 1 embodiments.
Fig. 3 is the indicative flowchart that phase sequence calibration is carried out to generator of Fig. 1 embodiments.
Fig. 4 is the schematic connection diagram for carrying out detecting circuit to generator during phase sequence calibration of Fig. 1 embodiments.
Fig. 5 is the signal for carrying out detecting circuit and unit output end to be measured to generator during phase sequence calibration of Fig. 1 embodiments
Property connection figure.
When Fig. 6 is that the phase sequence calibration generator operation of Fig. 1 embodiments is normal, the polar plot of three-phase voltage.
When Fig. 7 is that the phase sequence of Fig. 1 embodiments calibrates generator output end access unbalanced load, the vector of three-phase voltage
Figure.
Fig. 8 detects circuit for the utilization of Fig. 1 embodiments and synchronizes an indicative flowchart for calibration.
Fig. 9 is that the utilization of Fig. 1 embodiments detects circuit and synchronizes the schematic connection diagram that circuit is detected during calibration.
Figure 10 is the schematic diagram of the system of the grid-connected preceding detection of the generator parallel of an embodiment.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Embodiment 1
Referring to Fig. 1-9, a kind of method of detection before generator parallel is grid-connected, including：
S11, generator parallel it is grid-connected switch close a floodgate before using detect circuit to generator progress phase sequence calibration；
In the present embodiment, the detection circuit includes：Electric capacity C, the first indicator lamp H1 and the second indicator lamp H2；The electric capacity C,
One indicator lamp H1 and the second indicator lamp H2 both ends are all connected with lead.The first indicator lamp H1 and the second indicator lamp H2 complete one
Sample.It follows that this component for including of detection circuit is extremely simple, the simple combination for showing lamp is simply meant to, price and its cheap.
Step S11 specifically comprises the following steps：
S111, by electric capacity C one end U12, the first indicator lamp H1 one end V22 and the second indicator lamp H2 one end W32 connections；Will
Electric capacity C, the first indicator lamp H1 and the second indicator lamp H2 composition Y-connections.
S112, by electric capacity C other end U10, the first indicator lamp H1 other end V20 and the second indicator lamp H2 other end
W30 is respectively connected to the A ends, B ends and C-terminal of the three-phase output end of the generator, referring to Fig. 5；
S113, observe the first indicator lamp H1 and the second indicator lamp H2 state；
S114, judge whether the first indicator lamp H1 is brighter than the second indicator lamp H2；If so, then perform step S115；If not, perform
Step S116.
S115, then judge that the phase sequence of the grid-connected switch ends of generator parallel is consistent.
S116, then judge that the phase sequence of the grid-connected switch ends of generator parallel is inconsistent.Generator exports three-phase balanced system
Accessed unbalanced load, caused neutral point drifting, caused the voltage that is added on two indicator lamps different, two indicator lamps it is bright
Degree can be different and different due to voltage, if phase sequence is " just ", the first indicator lamp H1 is brighter, and the first indicator lamp H2 is dark；If phase
Sequence is " negative ", then two LED status are opposite.
Referring to Fig. 6, when generator operation is normal, generator output end A, B, C voltage have 120 ° of phase difference.Three-phase voltage
UAN、UBN、UCN120 ° of vector is differed for angle equal in magnitude.Because electric capacity C has accessed generator output end A, the first instruction
Lamp H1 access generator output end B, the second indicator lamp H2 access generator output end C, cause generator loading to form injustice
Weighing apparatus load, causes voltage vector to be changed, the voltage being added on indicator lamp H1 is UBN2, the voltage on indicator lamp H2 is
UCN2.Referring to Fig. 7, when the phase sequence of the grid-connected switch ends of generator parallel is consistent, this it appears that U from figureBN2＞ UCN2,
Therefore the first indicator lamp H1 is brighter than the second indicator lamp H2.It is on the contrary then anti-.
S12, if phase sequence is consistent, a calibration is synchronized using circuit is detected.
Step S12 specifically comprises the following steps：
S121, the both ends at the first indicator lamp H1 both ends and the second indicator lamp H2 are linked into respectively and the grid-connected switch of machine is identical
At the alternating current both ends of phase sequence；And the grid-connected switch ends of machine are three-phase alternating current power network, according to standard three-phase alternating current respectively with U,
V, W is represented, and three-phase alternating current netlist is shown as U1, V1, W1, and three-phase alternating current on the right side of the grid-connected switch of machine on the left of the grid-connected switch of machine
Netlist is shown as U2, V2, W2.Referring to Fig. 9, if simultaneously V phase, W phases are identical phase sequences in the grid-connected switch of machine, by the first indicator lamp
H1 terminals V20 is connected to and the V1 phases of the grid-connected switch of machine, and indicator lamp H1 another terminals V22 is connected into the V2 of grid-connected switch
Phase.Second indicator lamp H2 terminals W30 is connected to the W1 phases of the simultaneously grid-connected switch of machine, by the second indicator lamp H1 another terminals
W32 is connected to the W2 phases of grid-connected switch.
S122, observe the first indicator lamp H1 and the second indicator lamp H2 state；And judge that the first indicator lamp H1 and second refers to
Show whether lamp H2 extinguishes；If so, then perform step S123；If it is not, then perform step S124.
S123, judge the line lock of the simultaneously grid-connected switch ends of machine.
S124, judges and the power supply of the grid-connected switch ends of machine is asynchronous.And machine grid-connected switch ends in phase sequence the same as connecting
Indicator lamp, with the active development of phase, the electrical potential difference of indicator lamp changes from zero dy namics are up to, the indicator lamp both ends in synchronization
Electrical potential difference be zero, indicator lamp " goes out ", two indicator lamps being connected all go out when, and the line lock of the grid-connected switch ends of machine.
This programme generator parallel it is grid-connected switch close a floodgate before using detect circuit to generator progress phase sequence calibration；If phase
Sequence is consistent, and a calibration is synchronized using same detection circuit.This programme is only with the phase that generator can be completed once detection circuit
Sequence confirms and synchronous point check and correction, and need to only pass through simple wiring map function, and simple to operate, cost is low, avoids phase sequence mistake
The harm come with synchronous point error tape.In addition, the component that this detection circuit includes is extremely simple, show lamp simple group is simply meant to
Close, price and its cheap.
Embodiment 2
Referring to Figure 10, the system of detection before a kind of generator parallel is grid-connected, including：Phase sequence calibration module 1 and synchronous point calibrating die
Block 2；The phase sequence calibration module 1, for generator parallel it is grid-connected switch close a floodgate before using detect circuit to generator progress
Phase sequence is calibrated；The synchronous point calibration module 2, if consistent for phase sequence, a calibration is synchronized using circuit is detected.
In the present embodiment, the detection circuit includes：Electric capacity C, the first indicator lamp H1 and the second indicator lamp H2；The electric capacity
C, the first indicator lamp H1 and the second indicator lamp H2 both ends are all connected with lead.
In the present embodiment, the phase sequence calibration module 1, be additionally operable to by electric capacity C one end U12, the first indicator lamp H1 one
Hold V22 and the second indicator lamp H2 one end W32 connections；By electric capacity C other end U10, the first indicator lamp H1 other end V20 and
Second indicator lamp H2 other end W30 is respectively connected to the A ends, B ends and C-terminal of the three-phase output end of the generator；Observation the
One indicator lamp H1 and the second indicator lamp H2 state；If the first indicator lamp H1 is brighter than the second indicator lamp H2, judge generator simultaneously
The phase sequence of the grid-connected switch ends of machine is consistent.
In the present embodiment, the synchronous point calibration module 2, it is additionally operable to respectively refer to the first indicator lamp H1 both ends and second
Show that lamp H2 both ends are linked into and at the alternating current both ends of the identical phase sequence of the grid-connected switch of machine；Observe the first indicator lamp H1 and second
Indicator lamp H2 state；If the first indicator lamp H1 and the second indicator lamp H2 extinguish, the power supply of the simultaneously grid-connected switch ends of machine is judged
It is synchronous.
In the present embodiment, if the first indicator lamp H1 and the/the second indicator lamp H2 is bright, judge and the grid-connected switch ends of machine
Power supply is asynchronous.
This programme phase sequence calibration module generator parallel it is grid-connected switch close a floodgate before using detect circuit to generator progress
Phase sequence is calibrated；If phase sequence is consistent, synchronous point calibration module synchronizes a calibration using same detection circuit.This programme is only with one
The phase sequence of generator confirms detection circuit and synchronous point is proofreaded with regard to can complete, and simple to operate, cost is low, avoid phase sequence mistake and
The harm that synchronous point error tape comes.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of method of detection before generator parallel is grid-connected, it is characterised in that including：
Generator parallel it is grid-connected switch close a floodgate before using detect circuit to generator progress phase sequence calibration；
If phase sequence is consistent, a calibration is synchronized using circuit is detected.
The method of detection before 2. generator parallel according to claim 1 is grid-connected, it is characterised in that the detection circuit bag
Include：Electric capacity, the first indicator lamp and the second indicator lamp；
The both ends of the electric capacity, the first indicator lamp and the second indicator lamp are all connected with lead.
The method of detection before 3. generator parallel according to claim 2 is grid-connected, it is characterised in that in generator parallel simultaneously
The step of net switch carries out phase sequence calibration before closing a floodgate using the first detection circuit includes：
One end of one end of electric capacity, the first indicator lamp is connected with one end of the second indicator lamp；
The other end of the other end of electric capacity, the other end of the first indicator lamp and the second indicator lamp is respectively connected to the generator
Three-phase output end A ends, B ends and C-terminal；
Observe the state of the first indicator lamp and the second indicator lamp；
If the first indicator lamp is brighter than the second indicator lamp, judge that the phase sequence of the grid-connected switch ends of generator parallel is consistent.
The method of detection before 4. generator parallel according to claim 3 is grid-connected, it is characterised in that if phase sequence is consistent, profit
The step of synchronizing calibration with detection circuit includes：
The both ends of first indicator lamp and the both ends of the second indicator lamp are linked into the friendship of the identical phase sequence of the grid-connected switch of simultaneously machine respectively
Flow at electric both ends；
Observe the state of the first indicator lamp and the second indicator lamp；
If the first indicator lamp and the second indicator lamp extinguish, the line lock of the simultaneously grid-connected switch ends of machine is judged.
The method of detection before 5. generator parallel according to claim 4 is grid-connected, it is characterised in that if the first indicator lamp
It is bright with the/the second indicator lamp, then judges and the power supply of the grid-connected switch ends of machine is asynchronous.
A kind of 6. system of detection before generator parallel is grid-connected, it is characterised in that including：Phase sequence calibration module and synchronous point calibration
Module；
The phase sequence calibration module, for generator parallel it is grid-connected switch close a floodgate before using detect circuit to generator progress phase
Sequence is calibrated；
The synchronous point calibration module, if consistent for phase sequence, a calibration is synchronized using circuit is detected.
The system of detection before 7. generator parallel according to claim 6 is grid-connected, it is characterised in that the detection circuit bag
Include：Electric capacity, the first indicator lamp and the second indicator lamp；
The both ends of the electric capacity, the first indicator lamp and the second indicator lamp are all connected with lead.
The system of detection before 8. generator parallel according to claim 7 is grid-connected, it is characterised in that the phase sequence calibrating die
Block, it is additionally operable to connect one end of one end of electric capacity, the first indicator lamp with one end of the second indicator lamp；By the other end of electric capacity,
The other end of the other end of first indicator lamp and the second indicator lamp is respectively connected to the A ends of the three-phase output end of the generator, B
End and C-terminal；Observe the state of the first indicator lamp and the second indicator lamp；If the first indicator lamp is brighter than the second indicator lamp, hair is judged
The phase sequence of motor and the grid-connected switch ends of machine is consistent.
The system of detection before 9. generator parallel according to claim 8 is grid-connected, it is characterised in that the synchronous point calibration
Module, it is additionally operable to that the both ends of the first indicator lamp and the both ends of the second indicator lamp are linked into the identical phase of the grid-connected switch of simultaneously machine respectively
At the alternating current both ends of sequence；Observe the state of the first indicator lamp and the second indicator lamp；If the first indicator lamp and the second indicator lamp are equal
Extinguish, judge the line lock of the simultaneously grid-connected switch ends of machine.
The system of detection before 10. generator parallel according to claim 9 is grid-connected, it is characterised in that if the first indicator lamp
It is bright with the/the second indicator lamp, then judges and the power supply of the grid-connected switch ends of machine is asynchronous.
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| CN201710887926.0A CN107589314A (en) | 2017-09-27 | 2017-09-27 | The method and system of detection before a kind of generator parallel is grid-connected |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2328017Y (en) * | 1998-05-06 | 1999-07-07 | 谢为驹 | Phase sequence meter |
| CN102937672A (en) * | 2012-11-02 | 2013-02-20 | 北京天诚同创电气有限公司 | Three-phase alternating current phase sequence detection method and detection device for grid-connected equipment |
| CN104410096A (en) * | 2014-06-20 | 2015-03-11 | 上海吉亿电机有限公司 | Line sequence active detection and self-adaptation system and line sequence active detection and self-adaptation realization method |
| CN205049675U (en) * | 2015-10-31 | 2016-02-24 | 山东奥卓电气科技发展有限公司 | Converter aging testing system |
-
2017
- 2017-09-27 CN CN201710887926.0A patent/CN107589314A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2328017Y (en) * | 1998-05-06 | 1999-07-07 | 谢为驹 | Phase sequence meter |
| CN102937672A (en) * | 2012-11-02 | 2013-02-20 | 北京天诚同创电气有限公司 | Three-phase alternating current phase sequence detection method and detection device for grid-connected equipment |
| CN104410096A (en) * | 2014-06-20 | 2015-03-11 | 上海吉亿电机有限公司 | Line sequence active detection and self-adaptation system and line sequence active detection and self-adaptation realization method |
| CN205049675U (en) * | 2015-10-31 | 2016-02-24 | 山东奥卓电气科技发展有限公司 | Converter aging testing system |
Non-Patent Citations (2)
| Title |
|---|
| 邹仉平 编: "《小型发电机》", 30 April 1998, 中国电力出版社 * |
| 高栌 主编: "《电工电子实验技术》", 31 August 1991, 机械工业出版社 * |
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Application publication date: 20180116 |