CN206349764U - The single-phase off-network automatic switching control equipment of photovoltaic three-phase grid - Google Patents
The single-phase off-network automatic switching control equipment of photovoltaic three-phase grid Download PDFInfo
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- CN206349764U CN206349764U CN201621379766.6U CN201621379766U CN206349764U CN 206349764 U CN206349764 U CN 206349764U CN 201621379766 U CN201621379766 U CN 201621379766U CN 206349764 U CN206349764 U CN 206349764U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The single-phase off-network automatic switching control equipment of photovoltaic three-phase grid, relay (2) at least includes three groups of signal control devices, these signal control devices are connected in four input/out line of relay (2) in a balanced way, and, relay (2) has four inputs and four output ends, controller (4) is connected with every group of signal control device respectively, moreover, voltage/frequency determining device (5) is while be connected on four inputs and four output ends of relay (2)；Controller (4) includes sampling module, action module and communication module.Automatically switched by simultaneously off-network; system is set to remain to normal operation when electric network state is undergone mutation; the security of raising system, it is to avoid the not expected negative effect caused by power network is abnormal or powers off to equipment and power network, makes multi-energy system work more safe and efficient.
Description
Technical field
The utility model is related to the three-phase micro-grid system of photovoltaic generating system or the structure of three-phase energy-storage system apparatus
The single-phase off-network automatic switching control equipment of improved technology, especially photovoltaic three-phase grid.
Background technology
Generation of electricity by new energy and power network using photovoltaic, wind-powered electricity generation as representative, which are incorporated into the power networks, has unstability, to whole multiple-energy-source
System safety belt carrys out very big hidden danger.The Basic architecture of multi-energy system is by light storage mixing inverter, photovoltaic panel, battery
Constituted with power network.When operation of power networks is abnormal or interrupts, it is necessary to which one positioned at the switching device between power network and multi-energy system,
Inverter is taken corresponding emergency measure at once, the related emergency load of multi-energy system is cut off into faulty grids, and set up only
Vertical microgrid supplies emergency load electricity consumption, maintains the independent operating of multi-energy system, during preventing that operation of power networks is abnormal or interrupts, to being
System produces unpredictable influence, it is to avoid whole system is under more serious potential safety hazard.
However, because power network and distribution system are three-phase system, when power network is abnormal, multi-energy system is with power network by cutting
Changing device physics disconnects, and system switchs to off-grid operation, the power of now inverter three-phase output can because load it is different without
Together, if load matched imbalance easily causes inverter operation irregularity.So in such systems, the configuration of load is not only total
The limitation of power, each single-phase limitation requires also extremely important.This requires load to have to uniform configuration.And in reality
In situation, the load general power often having is not above system requirements, but has exceeded the single phase configuration requirement of system,
Cause this load also can not normal distribution situation.
Utility model content
The purpose of this utility model is to provide the single-phase off-network automatic switching control equipment of photovoltaic three-phase grid, will under different conditions
Multi-energy system realizes physical connection or the function of disconnection with power network, regulates and controls each energy module and organically combines, to ensure in power network
The safe operation of whole system in abnormality or power-off.
The purpose of this utility model will be realized by following technical measures：Including relay, controller and voltage/frequency
Determining device；Relay at least includes three groups of signal control devices, and these signal control devices are connected to relay in a balanced way
Four input/out line on, moreover, relay have four inputs and four output ends, controller respectively with every group
Signal control device is connected, moreover, voltage/frequency determining device is connected to four inputs and four output ends of relay simultaneously
On；Controller includes sampling module, action module and communication module.
Especially, relay is connected between multi-energy system and power network, wherein, multi-energy system include photovoltaic panel,
DC-AC light storage mixing inverter, battery and threephase load, photovoltaic panel and battery connection DC-AC light storage mixing inverters, DC-
AC light storage mixing inverter, connects the input of relay, and threephase load is connected to the two adjacent groups signal control in relay
Between device.Specifically, four output ends of relay connect L1, L2, L3 and N respectively.
Especially, controller is by RS485 connection multi-energy systems, also, the external remote control center of controller.
Especially, relay includes 3 groups of control signal devices：
It is grid-connected with off-network when relay status be respectively：
Advantage and effect of the present utility model：Automatically switched by simultaneously off-network, make system when electric network state is undergone mutation
Normal operation is remained to, the security of system is improved, it is to avoid be not expectable caused by power network is abnormal or powers off to equipment and power network
Negative effect, make multi-energy system work it is more safe and efficient.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment 1.
Fig. 2 is system application structure schematic diagram in the utility model embodiment 1.
Fig. 3 is three-phase grid working state schematic representation in the utility model embodiment 1.
Fig. 4 is single-phase off-network working state schematic representation in the utility model embodiment 1.
Fig. 5 is sampling module operating diagram in the utility model embodiment 1.
Fig. 6 is action module operating diagram in the utility model embodiment 1.
Fig. 7 is communication module operating diagram in the utility model embodiment 1.
Reference includes：
Multi-energy system 1, photovoltaic panel 101, DC-AC light storage mixing inverter 102, battery 103, threephase load 104, after
Electrical equipment 2, power network 3, controller 4, voltage/frequency determining device 5.
Embodiment
The utility model principle is that multiple-energy-source powering mode is different from traditional single power network power supply mode, switching device
The complexity of reduction system distribution itself is needed, to coordinate the operation of multi-energy system, when abnormal or interruption occurs for power network, energy
The requirement of enough various loads of adaptation for trying one's best many, to ensure that system is safely and steadily run while using green energy resource.Cause
This, automatic switching control equipment is needed with following functions：
1. with the ability for judging current electric grid running statu；
2. with power-off protection function：Be able to ensure that system operation occur it is unstable in the case of disconnect power network connection with
Protect the safety of system components；
3. the ability automatically switched with three-phase distribution with single phase distribution system；
4. with the function of being communicated with inverter：It according to operation of power networks state, can will notify inverter should be with which kind of operation
Mode operation.
The utility model includes：Relay 2, controller 4 and voltage/frequency determining device 5.
The utility model is described in further detail with reference to the accompanying drawings and examples.
Embodiment 1：As shown in Figure 1, relay 2 at least includes three groups of signal control devices, these signal control devices
It is connected in a balanced way in four input/out line of relay 2, moreover, relay 2 has four inputs and four
Output end, controller 4 is connected with every group of signal control device respectively, moreover, voltage/frequency determining device 5 is connected to relay simultaneously
On four inputs and four output ends of device 2；Controller 4 includes sampling module, action module and communication module.
In foregoing, as shown in Figure 2, relay 2 is connected between multi-energy system 1 and power network 3, wherein, multiple-energy-source system
System 1 includes photovoltaic panel 101, DC-AC light storage mixing inverter 102, battery 103 and threephase load 104, the He of photovoltaic panel 101
The connection DC-AC light storage mixing inverters 102 of battery 103, DC-AC light storage mixing inverter 102 connects the input of relay 2,
Threephase load 104 is connected between the two adjacent groups signal control device in relay 2.Specifically, four outputs of relay 2
End connects L1, L2, L3 and N respectively.
In foregoing, controller 4 is by RS485 connections multi-energy system 1, also, the external remote control center of controller 4.
In the present embodiment, relay 2 includes 3 groups of control signal devices：
It is grid-connected with off-network when the state of relay 2 be respectively：
As shown in Figure 5, controller 4 obtains the basic status of current system operation power by A/D sample, judges
Whether system operation is normal.
As shown in Figure 6, when abnormal or normal recovery occurs in power network, it is necessary to be realized by Relay switch motions
Break-make between power network and other modules, controls Relay Driver to reach the mesh of control Relay switches by controller 4
's.At least two Relay are all devised between multi-energy system inverter 1 and power network 3, threephase load 104 and power network 3 to protect
Card can disconnect the connection between multi-energy system inverter 1, threephase load 104 really in the exception of power network 3 or disconnection, carry
The reliability of high system.
As shown in Figure 7, due to the communication such as needs and inverter, the communication module of controller 4 uses 485 communications protocol,
Controller 4 is set to obtain communication with the grade of multi-energy system inverter 1, so that should according to current electric grid state notifying inverter
With which kind of mode operation.
Physics of the utility model device between multi-energy system inverter 1 and power network 3, threephase load 104 and power network 3
Connection has Redundancy Design, remains the protection of double relay.
The utility model operationally, the running status of power network 3 and multi-energy system is detected by sampling module, works as electricity
When the operation exception of net 3 or disconnection, as shown in Figure 4, the DC-AC light storage mixing that controller 4 can be closed first in multi-energy system 1
Inverter 102, and disconnect RYL11、RYL21、RYL31、RYN1、RYL13、RYL23、RYL33And RYN3, RYL12Holding is incorporated into, RYL22、
RYL32、RYN2The company of holding " under ", it is inverse after it is determined that being disconnected with power network 3, then by the DC-AC light storage mixing in multi-energy system 1
Become device 102 and switch to single-phase off-network mode operation, i.e., the output of three phase mains need to keep phase, frequency one in multi-energy system
Cause, switch RYL22、RYL32、RYN2To " on ", disconnect RYL22, while being incorporated into RYL11、RYL21、RYL31、RYN1；Now, threephase load
104, which will link together, becomes single-phase load, and their power supply will be provided by multi-energy system.When power system restoration is normal, such as
Shown in accompanying drawing 3, controller 4 can first close inverter, simultaneously switch off RYL11、RYL21、RYL31、RYN1；Switch RYL22、RYL32、RYN2
Arrive down, be incorporated into RYL13、RYL23、RYL33、RYN3、RYL22, it is determined that switching to three-phase grid to transport inverter again after being connected with power network
Row mode, then it is incorporated into RYL11、RYL21、RYL31、RYN1。
Claims (5)
1. the single-phase off-network automatic switching control equipment of photovoltaic three-phase grid, including relay (2), controller (4) and voltage/frequency judge
Device (5)；Characterized in that, relay (2) at least includes three groups of signal control devices, these signal control devices are distinguished in a balanced way
It is connected in four input/out line of relay (2), moreover, relay (2) has four inputs and four outputs
End, controller (4) is connected with every group of signal control device respectively, moreover, voltage/frequency determining device (5) is while be connected to relay
On four inputs and four output ends of device (2)；Controller (4) includes sampling module, action module and communication module.
2. the single-phase off-network automatic switching control equipment of photovoltaic three-phase grid as claimed in claim 1, it is characterised in that relay (2)
It is connected between multi-energy system (1) and power network (3), wherein, multi-energy system (1) includes photovoltaic panel (101), DC-AC light
Storage mixing inverter (102), battery (103) and threephase load (104), photovoltaic panel (101) and battery (103) connection DC-AC
Light storage mixing inverter (102), the input of DC-AC light storage mixing inverter (102) connection relay (2), threephase load
(104) it is connected between the two adjacent groups signal control device in relay (2).
3. the single-phase off-network automatic switching control equipment of photovoltaic three-phase grid as claimed in claim 2, it is characterised in that relay (2)
Four output ends connect L1, L2, L3 and N respectively.
4. the single-phase off-network automatic switching control equipment of photovoltaic three-phase grid as claimed in claim 1, it is characterised in that controller (4)
By RS485 connection multi-energy systems (1), also, controller (4) external remote control center.
5. the single-phase off-network automatic switching control equipment of photovoltaic three-phase grid as claimed in claim 1, it is characterised in that relay (2)
Including 3 groups of control signal devices：
It is grid-connected with off-network when relay (2) state be respectively：
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621379766.6U CN206349764U (en) | 2016-12-15 | 2016-12-15 | The single-phase off-network automatic switching control equipment of photovoltaic three-phase grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621379766.6U CN206349764U (en) | 2016-12-15 | 2016-12-15 | The single-phase off-network automatic switching control equipment of photovoltaic three-phase grid |
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| Publication Number | Publication Date |
|---|---|
| CN206349764U true CN206349764U (en) | 2017-07-21 |
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| CN201621379766.6U Active CN206349764U (en) | 2016-12-15 | 2016-12-15 | The single-phase off-network automatic switching control equipment of photovoltaic three-phase grid |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108008186A (en) * | 2017-12-08 | 2018-05-08 | 江苏智臻能源科技有限公司 | The separate configuration device of the non-intelligent terminal of registering one's residence of one kind and method |
| CN110635472A (en) * | 2019-08-22 | 2019-12-31 | 江苏固德威电源科技股份有限公司 | Method for increasing carrying capacity of three-phase energy storage inversion system and three-phase energy storage inversion system applying same |
| CN111614076A (en) * | 2019-02-22 | 2020-09-01 | 株洲中车时代电气股份有限公司 | Power supply system for three-phase four-wire system |
| CN111711225A (en) * | 2020-05-28 | 2020-09-25 | 江苏莱提电气股份有限公司 | Method and system for smoothly switching single-phase power supply of three-phase inverter power supply |
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2016
- 2016-12-15 CN CN201621379766.6U patent/CN206349764U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108008186A (en) * | 2017-12-08 | 2018-05-08 | 江苏智臻能源科技有限公司 | The separate configuration device of the non-intelligent terminal of registering one's residence of one kind and method |
| CN108008186B (en) * | 2017-12-08 | 2024-04-05 | 江苏智臻能源科技有限公司 | Non-home intelligent terminal phase configuration device and method |
| CN111614076A (en) * | 2019-02-22 | 2020-09-01 | 株洲中车时代电气股份有限公司 | Power supply system for three-phase four-wire system |
| CN111614076B (en) * | 2019-02-22 | 2023-05-12 | 株洲中车时代电气股份有限公司 | Power supply system for three-phase four-wire system |
| CN110635472A (en) * | 2019-08-22 | 2019-12-31 | 江苏固德威电源科技股份有限公司 | Method for increasing carrying capacity of three-phase energy storage inversion system and three-phase energy storage inversion system applying same |
| CN111711225A (en) * | 2020-05-28 | 2020-09-25 | 江苏莱提电气股份有限公司 | Method and system for smoothly switching single-phase power supply of three-phase inverter power supply |
| CN111711225B (en) * | 2020-05-28 | 2022-02-15 | 江苏莱提电气股份有限公司 | Method and system for smoothly switching single-phase power supply of three-phase inverter power supply |
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| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220608 Address after: 310000 room 2001, 20 / F, building 4, Zhongheng building, No. 69, Dongxin Avenue, high tech Zhijiang science and Technology Industrial Park, Binjiang District, Hangzhou, Zhejiang Province Patentee after: Hangzhou Xuda New Energy Technology Co.,Ltd. Address before: 200333 room 604-605, 6 / F, No. 1220 Tongpu Road, Putuo District, Shanghai Patentee before: GLOBAL MAINSTREAM DYNAMIC ENERGY TECHNOLOGY Ltd. |