CN207652056U - Energy storage inverter and off-network switching system - Google Patents
Energy storage inverter and off-network switching system Download PDFInfo
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- CN207652056U CN207652056U CN201721569868.9U CN201721569868U CN207652056U CN 207652056 U CN207652056 U CN 207652056U CN 201721569868 U CN201721569868 U CN 201721569868U CN 207652056 U CN207652056 U CN 207652056U
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- energy storage
- storage inverter
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Abstract
A kind of energy storage inverter and off-network switching system, the time-delay relay for being Y seconds including energy storage inverter, control module, first switch unit and delay, the control module is connected by communication bus with the energy storage inverter, the control module, which is used to control the time-delay relay when the energy storage inverter needs to carry out the grid-connected switching of off-network turn, enters Delayed conducting state, while controlling the energy storage inverter and entering grid-connected readiness by off-grid operation state in X seconds；The control module be additionally operable to the energy storage inverter need to carry out it is grid-connected leave net when control the time-delay relay and enter delay cut-off state and control that the energy storage inverter is interior at X second to enter off-network readiness by grid-connected state simultaneously, Y >=X and X, Y are natural number；Above-mentioned energy storage inverter and off-network switching system have a safety feature and reliability is high.
Description
【Technical field】
The utility model is related to electrical equipment technical field more particularly to a kind of energy storage inverter and off-network switching systems.
【Background technology】
Currently, with the fast development of distributed power generation, the application of energy storage inverter is also more and more extensive, energy storage inverter
A variety of distributed generation resources, load, energy storage are effectively organized, can be both incorporated into the power networks with external main power grid, it can also off-network
Operation, is a kind of higher structure form of distributed power generation.It is connected usually between power grid and energy storage inverter in the prior art
One switch, is realized by controlling switch and off-network switches.And energy storage inverter is when grid-connect mode state is run, if even
The switch being connected between power grid and energy storage inverter disconnects suddenly, and energy storage inverter just can't detect voltage and start decompression dress
It sets, entire energy storage inverter immediately enters the state of shutdown, to start off-grid operation pattern.When energy storage inverter from
When net mode state is run, if the switch being connected between power grid and energy storage inverter is closed suddenly, energy storage inverter at this time
It is in the pattern that off-network is externally discharged, can be caused to the huge impact of power grid.
In view of the foregoing, it is really necessary to provide a kind of novel energy storage inverter and off-network switching system is above to overcome
Defect.
【Invention content】
The purpose of this utility model is to provide a kind of energy storage inverter and off-network switching having a safety feature and reliability is high
System.
To achieve the goals above, the utility model provides a kind of energy storage inverter simultaneously off-network switching system, including energy storage
Inverter, control module, first switch unit and delay are Y second time-delay relays, and the first switch unit includes the
One coil and first switch, the energy storage inverter have the first phase line connecting pin, the second phase line connecting pin and third phase
Line connecting pin；First end, second end and the third end of the first switch respectively with first phase line connecting pin, described
Two phase line connecting pins and third phase line connecting pin are connected, the 4th end, the 5th end and the 6th end of the first switch
It is connected respectively with the first firewire of AC network, the second firewire and third firewire；The first end of the time-delay relay and institute
The zero curve for stating AC network is connected, and the second end of the time-delay relay is connected with the first end of the first coil, described to prolong
When relay third end be connected with the control module, the second end of the first coil is connected with first firewire；Institute
It states control module by communication bus to be connected with the energy storage inverter, the control module is used to need in the energy storage inverter
It carries out off-network to turn to control the time-delay relay when grid-connected switching and enter Delayed conducting state, while controlling the energy storage inversion
Device enters grid-connected readiness in X seconds by off-grid operation state；The control module is additionally operable to need in the energy storage inverter
Grid-connected control the time-delay relay when leaving net and enter delay cut-off state and control the energy storage inverter simultaneously
Off-network readiness is entered by grid-connected state in X seconds, Y >=X and X, Y are natural number.
Further, when the energy storage inverter is in grid-connected readiness, the output voltage of the energy storage inverter
Amplitude and phase are consistent with the output voltage amplitude of the AC network and phase.
Further, it is contactor or relay to state first switch unit.
Compared with the prior art, the utility model controls the time-delay relay in first switch by the control module
It controls the energy storage inverter in advance before conducting and enters grid-connected run-up mode, and then prevent the energy storage inverter described the
Continue externally to convey electric energy with off-grid operation state after one switch conduction, and then avoids that the AC network is caused to impact；Institute
It states control module and controls the time-delay relay and control the energy storage inverter in advance before first switch cut-off to enter off-network pre-
Standby pattern, and then prevent the energy storage inverter from starting o-volt protection because can't detect the voltage of the AC network and cause
The case where shutdown, occurs.
【Description of the drawings】
Fig. 1 is the functional block diagram of the energy storage inverter that the embodiments of the present invention provide and off-network switching system.
【Specific implementation mode】
It is clear in order to make the purpose of this utility model, technical solution and advantageous effects be more clear, below in conjunction with
Attached drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, shows
So, the described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments.It is new based on this practicality
Embodiment in type, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
When an element was considered with another element " being connected ", it can be directly to another element or
It may be simultaneously present centering elements.Unless otherwise defined, all of technologies and scientific terms used here by the article and belong to this reality
It is identical with the novel normally understood meaning of those skilled in the art.Made in the specification of the utility model herein
Term, which is only for the purpose of describing specific embodiments, to be not intended to limit the utility model.
Referring to Fig. 1, Fig. 1 is the energy storage inverter that the embodiments of the present invention provide and off-network switching system 100
Functional block diagram.The energy storage inverter and off-network switching system 100 include energy storage inverter 1, control module 2, time-delay relay 3
And first switch unit 4, the first switch unit 4 include first coil L1 and first switch K1, the energy storage inversion
Device 1 has the first phase line connecting pin A, the second phase line connecting pin B and third phase line connecting pin C.The of the first switch K1
One end, second end and third end respectively with first phase line connecting pin A, second phase line connecting pin B and described
Triple line connecting pin C is connected, the 4th end, the 5th end and the 6th end of the first switch K1 respectively with AC network first
Firewire a, the second firewire b and third firewire c are connected.It should be noted that the first switch K1 is three step switch, when described
When first switch K1 conduction and cut-offs, first end and the 4th end of the first switch K1 are electrical connected/disconnect, and described first opens
The second end for closing K1 is electrical connected/disconnects with the 5th end, and third end and the 6th end of the first switch K1 are electrical connected/break
It opens.
The first end of the time-delay relay 3 is connected with the zero curve d of the AC network, and the of the time-delay relay 3
Two ends are connected with the first end of the first coil L1, and the third end of the time-delay relay 3 is connected with the control module 21,
The second end of the first coil L1 is connected with the first firewire a.
The control module 2 is connected by communication bus with the energy storage inverter 1, and the control module 2 is used in institute
It states energy storage inverter 1 and needs control the time-delay relay 3 when the grid-connected switching of off-network turn into Delayed conducting state, simultaneously
It controls the energy storage inverter 1 and grid-connected readiness is entered by off-grid operation state in X seconds.The control module 2 is additionally operable to
The energy storage inverter 1 need to carry out it is grid-connected leave net switching when control the time-delay relay 3 and enter delay cut-off state
And the energy storage inverter 1 is controlled simultaneously, off-network readiness is entered by grid-connected state in X seconds.It should be noted that
The delay of the time-delay relay 3 is set as Y seconds, and Y >=X and X, Y are natural number.It should be noted that when the energy storage inverter 1
When in grid-connected readiness, the output voltage amplitude and phase of the energy storage inverter 1 and the output electricity of the AC network
Pressure amplitude value and phase are consistent.
The first switch unit 4 is contactor or relay.
The operation principle of the utility model energy storage inverter and off-network switching system 100 will be illustrated below.
When the energy storage inverter 1 need carry out off-network turn grid-connected switching when, the control module 2 control it is described delay after
Electric appliance 3 enters Delayed conducting state and controls the energy storage inverter 1 simultaneously entered grid-connected preparation at X seconds by off-grid operation state
State.Since the conducting retardation time of the time-delay relay 3 is Y seconds and Y >=X, and since the time-delay relay 3 is connected
When, the first coil L1 electrifications, and then the first switch K1 is also switched on, therefore, before first switch K1 conductings, institute
It states energy storage inverter 1 and comes into grid-connected readiness, when the first switch K1 is connected, the energy storage inverter 1 enters
Be incorporated into the power networks pattern.It is being connected in first switch K1 it is appreciated that controlling the time-delay relay 3 by the control module 2
The preceding energy storage inverter 1 that controls in advance enters grid-connected run-up mode, and then prevents the energy storage inverter 1 from being opened described first
Continue externally to convey electric energy with off-grid operation state after closing K1 conductings, and then avoids that the AC network is caused to impact.
When the energy storage inverter 1 need to carry out it is grid-connected leave net switching when, the control module 2 control the delay after
Electric appliance 3 enters delay cut-off state and control the energy storage inverter 1 entered off-network preparation at X seconds by grid-connected state simultaneously
State.Since the conducting retardation time of the time-delay relay 3 is Y seconds and Y >=X, and since the time-delay relay 3 ends
When, the first coil L1 is not charged, and then the first switch K1 is also switched off, therefore, before first switch K1 cut-offs,
The energy storage inverter 1 comes into off-network readiness, when the first switch K1 is connected, the energy storage inverter 1 into
Enter off-grid operation pattern.It is appreciated that the control module 2 controls the time-delay relay 3 ends premise in first switch K1
The preceding control energy storage inverter 1 enters off-network run-up mode, and then prevents the energy storage inverter 1 because can't detect the friendship
The voltage of galvanic electricity net and the case where carry out o-volt protection and cause to shut down.
The utility model controls the time-delay relay 3 in first switch K1 in conducting premise by the control module 2
The preceding control energy storage inverter 1 enters grid-connected run-up mode, and then prevents the energy storage inverter 1 in the first switch K1
Continue externally to convey electric energy with off-grid operation state after conducting, and then avoids that the AC network is caused to impact.The control
Module 2 controls the time-delay relay 3 and controls the energy storage inverter 1 in advance into off-network preparation before first switch K1 cut-offs
Pattern, and then prevent the energy storage inverter 1 from starting o-volt protection because can't detect the voltage of the AC network and cause
The case where shutdown, occurs.
The utility model is not restricted to described in description and embodiments, thus for the personnel of familiar field and
Other advantage and modification is easily implemented in speech, therefore without departing substantially from universal defined by claim and equivalency range
In the case of spirit and scope, the utility model is not limited to specific details, representative equipment and shown here as with description
Diagram example.
Claims (3)
1. a kind of energy storage inverter and off-network switching system, it is characterised in that：The energy storage inverter and off-network switching system packet
Energy storage inverter, control module, first switch unit and delay are included as Y seconds time-delay relays, the first switch unit
Including first coil and first switch, the energy storage inverter have the first phase line connecting pin, the second phase line connecting pin and
Third phase line connecting pin；First end, second end and the third end of the first switch respectively with first phase line connecting pin,
Second phase line connecting pin and third phase line connecting pin are connected, the 4th end of the first switch, the 5th end and
6th end is connected with the first firewire of AC network, the second firewire and third firewire respectively；The first of the time-delay relay
End is connected with the zero curve of the AC network, and the second end of the time-delay relay is connected with the first end of the first coil,
The third end of the time-delay relay is connected with the control module, the second end of the first coil and the first firewire phase
Even；The control module is connected by communication bus with the energy storage inverter, and the control module is used for inverse in the energy storage
Become device to need to carry out off-network to turn to control the time-delay relay when grid-connected switching and enter Delayed conducting state, while controlling the storage
Energy inverter enters grid-connected readiness in X seconds by off-grid operation state；The control module is additionally operable to inverse in the energy storage
Become device to need to carry out grid-connected to control the time-delay relay when leaving net and enter delay cut-off state and control the energy storage simultaneously
Inverter enters off-network readiness in X seconds by grid-connected state, and Y >=X and X, Y are natural number.
2. energy storage inverter according to claim 1 and off-network switching system, it is characterised in that：When the energy storage inverter
When in grid-connected readiness, the output voltage of the output voltage amplitude and phase and the AC network of the energy storage inverter
Amplitude and phase are consistent.
3. energy storage inverter according to claim 2 and off-network switching system, it is characterised in that：The first switch unit
For contactor or relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721569868.9U CN207652056U (en) | 2017-11-21 | 2017-11-21 | Energy storage inverter and off-network switching system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721569868.9U CN207652056U (en) | 2017-11-21 | 2017-11-21 | Energy storage inverter and off-network switching system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207652056U true CN207652056U (en) | 2018-07-24 |
Family
ID=62890370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721569868.9U Expired - Fee Related CN207652056U (en) | 2017-11-21 | 2017-11-21 | Energy storage inverter and off-network switching system |
Country Status (1)
| Country | Link |
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| CN (1) | CN207652056U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109256850A (en) * | 2018-09-14 | 2019-01-22 | 浙江艾罗网络能源技术有限公司 | Energy accumulation current converter and off-network switching device |
| CN112952819A (en) * | 2021-03-19 | 2021-06-11 | 江苏固德威电源科技股份有限公司 | Split-phase output fast switching circuit and control method for restraining surge current adopted by same |
-
2017
- 2017-11-21 CN CN201721569868.9U patent/CN207652056U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109256850A (en) * | 2018-09-14 | 2019-01-22 | 浙江艾罗网络能源技术有限公司 | Energy accumulation current converter and off-network switching device |
| CN112952819A (en) * | 2021-03-19 | 2021-06-11 | 江苏固德威电源科技股份有限公司 | Split-phase output fast switching circuit and control method for restraining surge current adopted by same |
| CN112952819B (en) * | 2021-03-19 | 2024-06-11 | 固德威技术股份有限公司 | Split-phase output fast switching circuit and surge current suppression control method adopted by same |
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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: 20180724 Termination date: 20181121 |