CN206370694U - A kind of overvoltage managing and control system suitable for distributed grid-connected photovoltaic - Google Patents
A kind of overvoltage managing and control system suitable for distributed grid-connected photovoltaic Download PDFInfo
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- CN206370694U CN206370694U CN201621442122.7U CN201621442122U CN206370694U CN 206370694 U CN206370694 U CN 206370694U CN 201621442122 U CN201621442122 U CN 201621442122U CN 206370694 U CN206370694 U CN 206370694U
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- overvoltage
- photovoltaic
- distribution network
- power distribution
- control system
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- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000001960 triggered effect Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 3
- 238000007726 management method Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000035945 sensitivity 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
The utility model is related to a kind of overvoltage managing and control system suitable for distributed grid-connected photovoltaic, including the multiple photovoltaic modulies being connected with power distribution network, and its technical characterstic is：Overvoltage managing and control system is connected between power distribution network and multiple photovoltaic modulies, the overvoltage managing and control system includes voltage transformer, overvoltage controller and multiple inverters；The voltage transformer is connected with power distribution network, and the output end of the voltage transformer is connected with overvoltage controller, and the overvoltage controller is also connected with multiple inverters respectively, the connection corresponding with power distribution network and multiple photovoltaic modulies respectively of the multiple inverter.The utility model can effectively solve the problem that user's photovoltaic goes out the overvoltage problem that fluctuation is triggered, and ensure the quality of power supply and power supply reliability of user side, promote the safe and reliable extensive access power distribution network of distributed photovoltaic.
Description
Technical field
The utility model belongs to a kind of overvoltage management and control technical field, especially a kind of suitable for distributed grid-connected photovoltaic
Overvoltage managing and control system.
Background technology
The data announced according to National Energy Board (by the end of first quarter end in 2016)：The accumulative installation of domestic photovoltaic generation
50,310,000 kilowatts of total amount, wherein 7,020,000 kilowatts of distributed photovoltaic.On November 7th, 2016, National Energy Board formally issues《Electric power
Develop " 13 " planning (2016-2020)》, it is contemplated that the solar power generation installation of the year two thousand twenty whole nation reaches more than 1.1 hundred million thousand ten thousand,
Wherein more than 60,000,000 kilowatts of distributed photovoltaic.Distributed photovoltaic is in surge state, and distributed photovoltaic access in a large number of users side is matched somebody with somebody
Power network is the inexorable trend of China's intelligent grid development.
Distributed photovoltaic largely accesses power distribution network, and the fluctuation that distributed photovoltaic is exerted oneself brought electricity to user and power distribution network
Pressure problem.Overvoltage problem restricts the further increase of distributed photovoltaic permeability, and this not only influences the user side quality of power supply, also
The safe and reliable of user side low voltage electric network is affected, is wasted while causing production.
It is therefore desirable to solve the grid-connected overvoltage problem brought of distributed photovoltaic by technological means, it is reduced to distribution
The impact of net, improve power distribution network dissolve distributed photovoltaic access ability.
But, current user distribution formula photovoltaic is run by one or more grid-connected inverters, between each inverter
Control is separate.When illumination is uprushed, output power of photovoltaic module increase, grid-connected inverters voltage rise is easily caused use
The damage of the sensitivity electrical equipment such as family television set or the off-network of combining inverter.
Through retrieval, do not find and the same or analogous prior art of the utility model.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art to can solve the problem that distributed photovoltaic is grid-connected there is provided one kind
When produced overvoltage problem the overvoltage managing and control system suitable for distributed grid-connected photovoltaic
The utility model solves its technical problem and takes following technical scheme to realize：
A kind of overvoltage managing and control system suitable for distributed grid-connected photovoltaic, including the multiple photovoltaics being connected with power distribution network
Component, is connected with overvoltage managing and control system between power distribution network and multiple photovoltaic modulies, and the overvoltage managing and control system includes electricity
Press transformer, overvoltage controller and multiple inverters；The voltage transformer is connected with power distribution network, for gathering user point
The voltage at the grid-connected place of cloth；The output end of the voltage transformer is connected with overvoltage controller, mutual for receiving voltage
The voltage data of sensor；The overvoltage controller is also connected with multiple inverters respectively, in the case of overvoltage, by increasing
Plus the reactive power that each inverter is sent, voltage control in normal level；The multiple inverter respectively with power distribution network and
Multiple photovoltaic module correspondences are connected, for realizing conversion of the user distribution formula photovoltaic DC electricity to alternating current；
Advantage of the present utility model and good effect are：
1st, the utility model in user side by disposing the overvoltage managing and control system, when grid-connected inverters voltage is raised,
The multiple inverters of tunable are played a role jointly, and grid-connected voltage is adjusted to normal level, ensure user side the quality of power supply and
Power supply reliability.
2nd, the utility model can effectively solve the problem that user's photovoltaic goes out the overvoltage problem that fluctuation is triggered, and ensure user side
The quality of power supply and power supply reliability, promote the safe and reliable extensive access power distribution network of distributed photovoltaic.
Brief description of the drawings
Fig. 1 is system connection figure of the present utility model.
Embodiment
The utility model embodiment is described in further detail below in conjunction with accompanying drawing：
A kind of overvoltage managing and control system suitable for distributed grid-connected photovoltaic, as shown in figure 1, including being connected with power distribution network
Multiple photovoltaic modulies, overvoltage managing and control system, the overvoltage management and control are connected between power distribution network and multiple photovoltaic modulies
System includes voltage transformer, overvoltage controller and multiple inverters；The voltage transformer is connected with power distribution network, is used for
Gather the voltage at the grid-connected place of user distribution formula；The output end of the voltage transformer is connected with overvoltage controller, is used for
The voltage data of receiving voltage transformer；The overvoltage controller is also connected with multiple inverters respectively, in the feelings of overvoltage
Under condition, by increasing the reactive power that each inverter is sent, voltage control in normal level；The multiple inverter difference
Connection corresponding with power distribution network and multiple photovoltaic modulies, for realizing conversion of the user distribution formula photovoltaic DC electricity to alternating current.
In the present embodiment, solid line represents forceful electric power connection；Dotted line representation signal line is connected.
Operation principle of the present utility model is：
First according to the live photovoltaic installation situation of user and consumer networks situation, make user's photovoltaic module new by this practicality
The overvoltage managing and control system access power distribution network of type, and the voltage transformer in overvoltage managing and control system is accessed power distribution network.Secondly,
Overvoltage controller is connected with voltage transformer, inverter.When photovoltaic exert oneself increase cause overvoltage when, overvoltage control
Device is by increasing the reactive power that each inverter is sent, voltage control in normal level, so as to ensure user distribution formula light
That lies prostrate is safe and reliable grid-connected.
It is emphasized that embodiment described in the utility model is illustrative, rather than it is limited, therefore this reality
It is every new according to this practicality by those skilled in the art with the new embodiment including being not limited to described in embodiment
The other embodiment that the technical scheme of type is drawn, also belongs to the scope of the utility model protection.
Claims (1)
1. a kind of overvoltage managing and control system suitable for distributed grid-connected photovoltaic, including the multiple photovoltaic groups being connected with power distribution network
Part, it is characterised in that：Overvoltage managing and control system, the overvoltage management and control system are connected between power distribution network and multiple photovoltaic modulies
System includes voltage transformer, overvoltage controller and multiple inverters；The voltage transformer is connected with power distribution network, for adopting
Collect the voltage at the grid-connected place of user distribution formula；The output end of the voltage transformer is connected with overvoltage controller, for connecing
Receive the voltage data of voltage transformer；The overvoltage controller is also connected with multiple inverters respectively, in the situation of overvoltage
Under, by increasing the reactive power that each inverter is sent, voltage control in normal level；The multiple inverter respectively with
Power distribution network connection corresponding with multiple photovoltaic modulies, for realizing conversion of the user distribution formula photovoltaic DC electricity to alternating current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621442122.7U CN206370694U (en) | 2016-12-27 | 2016-12-27 | A kind of overvoltage managing and control system suitable for distributed grid-connected photovoltaic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621442122.7U CN206370694U (en) | 2016-12-27 | 2016-12-27 | A kind of overvoltage managing and control system suitable for distributed grid-connected photovoltaic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206370694U true CN206370694U (en) | 2017-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621442122.7U Active CN206370694U (en) | 2016-12-27 | 2016-12-27 | A kind of overvoltage managing and control system suitable for distributed grid-connected photovoltaic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206370694U (en) |
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2016
- 2016-12-27 CN CN201621442122.7U patent/CN206370694U/en active Active
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