CN208890396U - Photovoltaic for base station is from grid-connected integrated inverter power supply control system - Google Patents
Photovoltaic for base station is from grid-connected integrated inverter power supply control system Download PDFInfo
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- CN208890396U CN208890396U CN201821693758.8U CN201821693758U CN208890396U CN 208890396 U CN208890396 U CN 208890396U CN 201821693758 U CN201821693758 U CN 201821693758U CN 208890396 U CN208890396 U CN 208890396U
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- 238000001514 detection method Methods 0.000 claims abstract description 38
- 238000007689 inspection Methods 0.000 claims 1
- 238000004891 communication Methods 0.000 abstract description 17
- 238000011217 control strategy Methods 0.000 abstract description 16
- 238000012423 maintenance Methods 0.000 abstract description 12
- 230000001603 reducing effect Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 230000001788 irregular Effects 0.000 abstract description 3
- 238000010248 power generation Methods 0.000 abstract description 3
- 230000006641 stabilisation Effects 0.000 abstract description 3
- 238000011105 stabilization Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- 230000005611 electricity Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
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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
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Abstract
From grid-connected integrated inverter power supply control system, which includes photovoltaic input unit, city's electrical connection module, from grid-connected integrated inverter, first detection module, the second detection module, controller, contactor, Switching Power Supply, DC bus, battery and DC load for a kind of photovoltaic for base station；Whether there is or not alternating currents by judging current time for controller to open shutdown contactor, realize from it is grid-connected when inverter can work normally, and be supplied to the stable input of Switching Power Supply.Compared with prior art; the utility model use is from grid-connected integrated inverter; avoid frequent and irregular manual maintenance; it reducings the construction costs and the cost of manual maintenance simultaneously; using the photovoltaic for communication base station from grid-connected integrated inverter power supply control system from grid-connected switching control strategy; can guarantee from it is grid-connected when load end stabilization, the power of photovoltaic power generation can be voluntarily adjusted according to bearing power in off-network, protect load in the case where improve efficiency.
Description
Technical field
The utility model relates to photovoltaic power supply, power electronic technique and automation field, specifically, being related to photovoltaic from simultaneously
Integrated inverter power supply control system is netted, can be used for communication base station.
Background technique
Market Research shows, power supply system used in communication base station is mostly the alternating current that power grid provides, through over commutation and
After DC/DC transformation, power to communication module.But in the long run, such power supply mode be there are problems that.Firstly, for side
For the communication base station in remote area, alternating current is unstable to be meaned continually to power off and can not persistently supply load, and communication is caused to face
Situation off and on can not provide good Communications service；If then needing repairing secondly, the alternating current of long period powers off
Personnel carry battery or generator and repair to outlying district, restore to communicate, this greatly labor intensive cost；Again,
With being gradually increased for energy-saving and emission-reduction dynamics, the energy-saving and emission-reduction of communication base station are also increasingly taken seriously, photovoltaic power supply system energy
Enough play very important effect.Therefore the photovoltaic of communication base station becomes common solution from grid-connected power supply system.
Current communication base station photovoltaic from grid-connected power supply system, off-network and grid-connected be generally arranged respectively using two
It is standby.It when grid-connected, using gird-connected inverter, is electrically connected with city, while the supply that simultaneously Switching Power Supply is loaded；When off-network, use
Off-network inverter disconnects gird-connected inverter and alternating current, only with off-network inverter connection photovoltaic and Switching Power Supply.The confession of this mode
The more demanding equipment cost of electric system, simultaneously because the time phase difference that off-network inverter and gird-connected inverter use is more outstanding
Very, so the service life of two kinds of inverters also differs larger, the replacement cycle is different, causes the inconvenience of maintenance.
Therefore, how it to be directed to the concrete condition that alternating current is unstable in the operational process of base station, in use photovoltaic from grid-connected system
In the case where, high equipment cost caused by off-network inverter and gird-connected inverter and artificial is used in the system simultaneously
The indefinite problem of maintenance cycle reduces maintenance difficulty and save the cost, becomes the prior art and continues the technical issues of solving.
Utility model content
The utility model in view of the defects existing in the prior art, proposes a kind of photovoltaic for communication base station from grid-connected one
Body inverter power supply control system is transported from communication base station save the cost and the angle of reduction maintenance difficulty for base station
The unstable concrete condition of alternating current during row uses in system simultaneously using photovoltaic from grid-connected system
The indefinite problem of high equipment cost and manual maintenance's period caused by off-network inverter and gird-connected inverter, utilizes one kind
Photovoltaic from grid-connected integrated inverter power supply control system, ensured while reducing communication base station maintenance cost to reach from it is grid-connected when
Load the purpose of even running.
The utility model discloses the photovoltaics for base station from grid-connected integrated inverter power supply control system, and feature exists
In:
Including photovoltaic input unit, city's electrical connection module, from grid-connected integrated inverter, first detection module, the second detection
Module, controller, contactor, Switching Power Supply and DC bus；
The photovoltaic input unit is electrically connected with described one end from grid-connected integrated inverter, described from grid-connected integrated inversion
The device other end is electrically connected with the contactor and the Switching Power Supply, and the detection of the second detection module is described from grid-connected integrated inverter
Output voltage electric current；The contactor other end is electrically connected with city's electrical connection module, and the first detection module detects alternating current
The voltage and current at end；Switching Power Supply is output to DC bus, and the DC bus provides DC power supply, and the controller obtains the
One detection module and the information of the second detection simultaneously control described from grid-connected integrated inverter and the contactor.
Optionally, the electric power supply control system further includes battery and DC load, and the DC bus is the electric power storage
Pond and the DC load provide electric energy.
The utility model has following advantages and effect compared with prior art:
(1) use avoids frequent and irregular manual maintenance, reducings the construction costs simultaneously from grid-connected integrated inverter
And the cost of manual maintenance.
(2) it is able to use different using the photovoltaic for communication base station from grid-connected integrated inverter power supply control system
From grid-connected switching control strategy, it is ensured that from it is grid-connected when load end stabilization.
(3) it is able to use different using the photovoltaic for communication base station from grid-connected integrated inverter power supply control system
From grid-connected switching control strategy, the power of photovoltaic power generation can be voluntarily adjusted according to bearing power in off-network, is loaded in protection
In the case where improve efficiency.
Detailed description of the invention
Fig. 1 is to be controlled according to the photovoltaic for base station of the utility model specific embodiment from grid-connected integrated inverter power supply
System structure diagram.
The technical characteristic in appended drawing reference the respectively referred to generation in figure are as follows:
1, photovoltaic input unit；2, city's electrical connection module；3, from grid-connected integrated inverter；4, first detection module；5,
Two detection modules；6, controller；7, contactor；8, Switching Power Supply；9, DC bus；10, battery；11, DC load.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It further needs exist for
It is bright, part relevant to the utility model is illustrated only for ease of description, in attached drawing rather than entire infrastructure.
The utility model lies in that: using controller, whether there is or not alternating currents by judging current time opens shutdown contactor, and
Change the working method from grid-connected integrated inverter by detection module, realize from it is grid-connected when inverter can work normally,
And it is supplied to the stable input of Switching Power Supply.
Specifically, showing the photovoltaic for base station according to the utility model specific embodiment from grid-connected one referring to Fig. 1
Body inverter power supply control system architecture schematic diagram.
The photovoltaic for being used for base station is electrically connected from grid-connected integrated inverter power supply control system, including photovoltaic input unit 1, city
Connection module 2, from grid-connected integrated inverter 3, first detection module 4, the second detection module 5, controller 6, contactor 7, switch electricity
Source 8, DC bus 9, battery 10, DC load 11；
The photovoltaic input unit is electrically connected with described one end from grid-connected integrated inverter, described from grid-connected integrated inversion
The device other end is electrically connected with the contactor and the Switching Power Supply, and the detection of the second detection module is described from grid-connected integrated inverter
Output voltage electric current；The contactor other end is electrically connected with city's electrical connection module, and the first detection module detects alternating current
The voltage and current at end；Switching Power Supply is output to DC bus, and the DC bus provides DC power supply, especially for the electric power storage
Pond and the DC load provide electric energy, and the controller obtains described in the information of first detection module and the second detection and control
From grid-connected integrated inverter and the contactor, whether there is or not alternating currents by judging current time to open shutdown contactor, realize from
Inverter can work normally when grid-connected, and be supplied to the stable input of Switching Power Supply.
Specifically: when the first detection module has detected that line voltage, the electric power supply control system are grid-connected work
Operation mode, the controller control is described to work from grid-connected integrated inverter in current source mode, it is preferred that work is in MPPT mould
Formula exports as the alternating current with alternating current same-phase with amplitude；The controller control is attracted contactor, and Switching Power Supply input is friendship
Galvanic electricity exports as DC bus, while giving battery and load supplying；When the first detection module detects no alternating current electricity
When stream, the electric power supply control system is off-network operating mode, and the controller control disconnects contactor, and is controlled described from grid-connected
Integrated inverter work is constant voltage constant frequency, photovoltaic input unit is only powered to Switching Power Supply at this time in voltage source mode.
No matter off-network or grid-connected, Switching Power Supply input is the alternating current from grid-connected integrated inverter output, exports and is
Direct current, while powering to battery and DC load.
According to the above-mentioned photovoltaic for base station from grid-connected integrated inverter power supply control system, according to first detection module
City's electricity condition, that is, city's electricity condition in this period is detected, and according to city's electricity condition of upper cycle detection, to judge the control to be carried out
System strategy, from grid-connected method for handover control include off-network switching Grid-connected Control Strategy, it is grid-connected after control strategy, it is grid-connected switch from
Control strategy after net control strategy and off-network.
The off-network switches Grid-connected Control Strategy, specifically includes the following steps:
When the cycle detection of this secondary control is to have an alternating current, when upper secondary control cycle detection is no alternating current, then switched using off-network
Grid-connected Control Strategy, it is grid-connect mode that controller, which is controlled from grid-connected integrated inverter work, at this time, first will be from grid-connected integrated inversion
Device output control is arrived with alternating current same-phase with amplitude same frequency, further according to maximum power point-tracing control method (i.e. MPPT mode)
The output current reference value from grid-connected integrated inverter is set, and closed-loop control is carried out according to setting reference value, from grid-connected one
After inverter and alternating current same-phase are with amplitude same frequency, it is attracted contactor and alternating current is grid-connected.
The grid-connected rear control strategy, specifically includes the following steps:
When the cycle detection of this secondary control is to have alternating current, upper secondary control cycle detection is when having alternating current, then using grid-connected rear control
System strategy, it is grid-connected after control without operating contactor, need to only be set according to maximum power point-tracing control method from grid-connected one
The output current reference value of body inverter, and closed-loop control is carried out according to setting reference value.
The grid-connected switching off-network control strategy, specifically includes the following steps:
When the cycle detection of this secondary control is no alternating current, upper secondary control cycle detection is when having alternating current, then to use grid-connected switching
Off-network control strategy, controller control contactor disconnect, and control from grid-connected integrated inverter work in off-network mode.Judgement is negative
Power and photovoltaic maximum power are carried, if bearing power is greater than photovoltaic maximum power, according to maximum power point-tracing control method
The output voltage reference value of off-network inverter is set, and closed-loop control is carried out according to setting reference value；If bearing power is less than light
Maximum power is lied prostrate, then according to the output voltage reference value of bearing power setting off-network inverter, and is carried out according to setting reference value
Closed-loop control.
Control strategy after the off-network, specifically includes the following steps:
When the cycle detection of this secondary control is no alternating current, when upper secondary control cycle detection is no alternating current, then using being controlled after off-network
System strategy, controller is controlled to work from grid-connected integrated inverter, bearing power and photovoltaic maximum power is judged, if bearing power is big
In photovoltaic maximum power, then the output voltage reference value of off-network inverter is set according to maximum power point-tracing control method, and
Closed-loop control is carried out according to setting reference value；If bearing power is less than photovoltaic maximum power, off-network is set according to bearing power
The output voltage reference value of inverter, and closed-loop control is carried out according to setting reference value.
After completing from Grid-connected Control Strategy, control switch power good DC bus-bar voltage, and record this alternating current
State, into next control period.
The utility model has following advantages and effect compared with prior art:
(1) use avoids frequent and irregular manual maintenance, reducings the construction costs simultaneously from grid-connected integrated inverter
And the cost of manual maintenance.
(2) it is able to use different using the photovoltaic for communication base station from grid-connected integrated inverter power supply control system
From grid-connected switching control strategy, it is ensured that from it is grid-connected when load end stabilization.
(3) it is able to use different using the photovoltaic for communication base station from grid-connected integrated inverter power supply control system
From grid-connected switching control strategy, the power of photovoltaic power generation can be voluntarily adjusted according to bearing power in off-network, is loaded in protection
In the case where improve efficiency.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that specific embodiment of the present utility model is only limitted to this, for the utility model person of an ordinary skill in the technical field
For, without departing from the concept of the premise utility, several simple deduction or replace can also be made, all should be considered as
Belong to the utility model and determines protection scope by the claims submitted.
Claims (2)
1. a kind of photovoltaic for base station is from grid-connected integrated inverter power supply control system, it is characterised in that:
Including photovoltaic input unit, city's electrical connection module, from grid-connected integrated inverter, first detection module, the second detection module,
Controller, contactor, Switching Power Supply and DC bus；
The photovoltaic input unit is electrically connected with described one end from grid-connected integrated inverter, described another from grid-connected integrated inverter
One end is electrically connected with the contactor and the Switching Power Supply, and the detection of the second detection module is described defeated from grid-connected integrated inverter
Voltage and current out；The contactor other end is electrically connected with city's electrical connection module, the first detection module detection mains terminal
Voltage and current；Switching Power Supply is output to DC bus, and the DC bus provides DC power supply, and the controller obtains the first inspection
It surveys the information of module and the second detection and controls described from grid-connected integrated inverter and the contactor.
2. electric power supply control system according to claim 1, it is characterised in that:
The electric power supply control system further includes battery and DC load, and the DC bus is the battery and the direct current
Load provides electric energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821693758.8U CN208890396U (en) | 2018-10-18 | 2018-10-18 | Photovoltaic for base station is from grid-connected integrated inverter power supply control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821693758.8U CN208890396U (en) | 2018-10-18 | 2018-10-18 | Photovoltaic for base station is from grid-connected integrated inverter power supply control system |
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| Publication Number | Publication Date |
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| CN208890396U true CN208890396U (en) | 2019-05-21 |
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| CN201821693758.8U Active CN208890396U (en) | 2018-10-18 | 2018-10-18 | Photovoltaic for base station is from grid-connected integrated inverter power supply control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113708405A (en) * | 2021-08-24 | 2021-11-26 | 深圳硕日新能源科技有限公司 | Energy storage off-grid inverter, control method thereof and energy storage off-grid inverter system |
-
2018
- 2018-10-18 CN CN201821693758.8U patent/CN208890396U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113708405A (en) * | 2021-08-24 | 2021-11-26 | 深圳硕日新能源科技有限公司 | Energy storage off-grid inverter, control method thereof and energy storage off-grid inverter system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240115 Address after: Building 2, Fuhai Center, Daliushu Road, Haidian District, Beijing, 100080, 1301 Patentee after: BEIJING KINGDOM NETWORK TECHNOLOGIES Co.,Ltd. Address before: Room 1311, Building 2, Fuhai Center, Daliushu Road, Haidian District, Beijing, 100081 Patentee before: BEIJING KINGDOMNET NEW ENERGY TECHNOLOGY CO.,LTD. |
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| TR01 | Transfer of patent right |