CN108051665A - A kind of anti-isolated island alarm device of grid-connected system - Google Patents
A kind of anti-isolated island alarm device of grid-connected system Download PDFInfo
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- CN108051665A CN108051665A CN201711147799.7A CN201711147799A CN108051665A CN 108051665 A CN108051665 A CN 108051665A CN 201711147799 A CN201711147799 A CN 201711147799A CN 108051665 A CN108051665 A CN 108051665A
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- unit
- grid
- alarm
- isolated island
- processing unit
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
Abstract
The invention discloses a kind of anti-isolated island alarm devices of grid-connected system.Solve the problems, such as that the protection of passive type isolated island can not ensure to prevent island effect completely in the prior art.Device includes voltage detection unit, on off state detection unit, processing unit, Alarm Unit, voltage detection unit input terminal is connected between grid-connected switch and power grid on circuit, voltage detection unit output terminal is connected with processing unit, processing unit is connected with Alarm Unit, and Alarm Unit is connected with user mobile phone end.It is an advantage of the invention that the situation by detecting network voltage, working frequency and grid-connected switch, to determine whether form isolated island, and can staff be sent information to by short message mode, staff is alerted, staff is enable to go handling failure before in time, the present invention can effectively detect island effect, solve the problems, such as that because gird-connected inverter is in blind area or tripping island effect cannot be prevented completely, so as to ensure the safety of equipment and personnel.
Description
Technical field
It generates electricity by way of merging two or more grid systems technical field the present invention relates to one kind, more particularly, to a kind of anti-isolated island alarm device of grid-connected system.
Background technology
When island effect refers to power grid decompression, grid-connected system（Such as photovoltaic, wind-powered electricity generation）It still keeps to certain in decompression power grid
A part of circuit continues the state of power supply.This meeting serious threat is to equipment and life safety, so a protection is needed to prevent
The generation of island phenomenon, although gird-connected inverter has the protection of passive type isolated island（Tripping grid-connected switch when power grid decompression）,
But when passive type protection in blind area or grid-connected breaker tripping when there is no guarantee that preventing island effect completely.
The content of the invention
The present invention, which mainly solves passive type isolated island protection in the prior art, can not ensure to prevent island effect completely
Problem provides a kind of anti-isolated island alarm device of grid-connected system.
The above-mentioned technical problem of the present invention is mainly what is be addressed by following technical proposals：A kind of anti-orphan of grid-connected system
Island alarm device, grid-connected system include gird-connected inverter, be connected on the DC power supply of combining inverter input end, be connected to it is grid-connected inverse
Become the grid-connected switch between device output terminal and power grid, device includes the voltage detection unit for detecting grid voltage change, right
The on off state detection unit that grid-connected switch on and off is detected judges island effect according to grid-connected switch and network voltage information
Processing unit, the Alarm Unit of early warning is carried out to staff by short message, the voltage detection unit input terminal is connected to
Between grid-connected switch and power grid on circuit, voltage detection unit output terminal is connected with processing unit, processing unit and Alarm Unit
It is connected, Alarm Unit is connected with user mobile phone end.Apparatus of the present invention can by detecting the situation of network voltage and grid-connected switch,
To determine whether forming isolated island, and can staff be sent information to by short message mode, staff is alerted, makes work
Make personnel can in time before go handling failure, the present invention can effectively detect island effect, solve because gird-connected inverter is in
The problem of blind area or tripping cannot prevent island effect completely, so as to ensure the safety of equipment and personnel.
As a preferred embodiment, the frequency detecting unit being detected to the variation of network operation frequency, frequency are further included
Rate detection unit input terminal is connected between grid-connected switch and power grid on circuit, and it is single that flat rate detection unit output terminal is connected to processing
In member.This programme cause can also by detect network operation frequency variation and grid-connected switch conditions to determine whether formed isolated island
Effect, and can be formed and combined with voltage detecting, sentence as long as the extremely one of condition of electric voltage exception or working frequency is met
Break to form island effect, further improve accuracy of detection, solve because gird-connected inverter is in blind area or tripping cannot be complete
Full the problem of preventing island effect, so as to ensure the safety of equipment and personnel.
As a preferred embodiment, the Alarm Unit includes warning information generation unit, number setting unit, short message hair
Send unit, processing unit is connected with warning information generation unit, warning information generation unit respectively with number setting unit, short message
Transmitting element is connected.Warning information generation unit is according to the generation pair of the information of the information of voltage detecting or frequency detecting in this programme
The warning information answered.Number setting unit is used to setting and preserving the telephone number alerted, will by short message sending unit
The warning information of warning information generation unit generation is sent respectively on the phone number specified.
As a preferred embodiment, communication unit is further included, processing unit is connected with communication unit, and communication unit passes through net
Network is connected with cloud server end.This programme provides network function for device so that device is by the information detected and alarm
Information is sent to cloud server end and is stored so that staff can be accessed by network, can be understood in time
Solve the situation of power grid island effect.
As a preferred embodiment, audible alarm unit is further included, the audible alarm unit is connected on Alarm Unit.
This programme can be alarmed by sound, and staff can be reminded in time.
As a preferred embodiment, including installing housing, installation housing includes main body, before the front and rear opening of main body is installed respectively
Panel and rear panel are separately installed in installation housing both sides for fixed ear, and input button is provided on the front panel, is shown
Display screen and warning light, input button, display screen, warning light are connected respectively with processing unit.
As a preferred embodiment, a pair of of indent is respectively arranged in main body both sides, is additionally provided between two indents
Card slot, be respectively arranged in the both sides of fixed ear with the corresponding plate of indent, on the inside of the fixed ear on be provided with and card slot phase
Corresponding cutting, plate is inserted in indent during installation, cutting insertion and holding is in card slot.Fixed ear is using slotting in this programme
The mode connect is connected in main body, quick and easy for installation, fixation.
Therefore, it is an advantage of the invention that：By detecting the situation of network voltage, working frequency and grid-connected switch, to judge
Isolated island whether is formed, and can staff be sent information to by short message mode, staff is alerted, makes staff
Can in time before go handling failure, the present invention can effectively detect island effect, solve because gird-connected inverter be in blind area or
Tripping cannot prevent the problem of island effect completely, so as to ensure the safety of equipment and personnel.
Description of the drawings
Attached drawing 1 is a kind of circuit block diagram of the present invention；
Attached drawing 2 is a kind of structure diagram of present invention installation housing.
The grid-connected switch 4- on off state detection unit 5- voltage detection units of 1- DC power supply 2- gird-connected inverters 3-
6- frequency detecting unit 7- processing unit 8- communication unit 9- Alarm Unit 10- warning information generation unit 11- numbers are set
Put unit 12- short message sending unit 13- audible alarm unit 14- main body 15- front panel 16- rear panel 17- fixed ears
18- indent 19- card slot 20- plate 21- cutting 22- display screen 23- warning lights 24- inputs button.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.
Embodiment：
The anti-isolated island alarm device of a kind of grid-connected system of the present embodiment, as shown in Figure 1, grid-connected system includes gird-connected inverter 2, is connected on
The DC power supply 1 of combining inverter input end, the grid-connected switch 3 being connected between gird-connected inverter output terminal and power grid.Device
Voltage detection unit 5 including being used to detect grid voltage change detects the on off state that grid-connected switch on and off is detected
Unit 4 judges the processing unit 7 of island effect according to grid-connected switch and network voltage information, by short message to staff into
The Alarm Unit 9 of row early warning.Voltage detection unit input terminal is connected between grid-connected switch and power grid on circuit, voltage detecting list
First output terminal is connected with processing unit, and processing unit is connected with Alarm Unit, and Alarm Unit is connected with user mobile phone end.
In order to further improve accuracy of detection, device further includes the frequency being detected to the variation of network operation frequency and examines
Unit 6 is surveyed, frequency detecting unit input terminal is connected between grid-connected switch and power grid on circuit, and frequency detecting unit output terminal connects
It connects on a processing unit.
Alarm Unit includes warning information generation unit 10, number setting unit 11, short message sending unit 12, processing unit
It is connected with warning information generation unit, warning information generation unit is connected respectively with number setting unit, short message sending unit.It is short
Believe transmitting element and the short connection of user mobile phone.
In order to increase network function, device further includes communication unit 8, and communication unit is connected with processing unit.In order into
Row audible alarm, in time reminds staff, and device further includes audible alarm unit, and audible alarm unit is single with alarm
Member is connected.
As shown in Fig. 2, device includes installation housing, installation housing includes main body 14, before the front and rear opening of main body is installed respectively
Panel 15 and rear panel 16 are separately installed in installation housing both sides for fixed ear 17.Input button is provided on front panel
24th, display screen 22 and warning light 23, input button, display screen, warning light are connected respectively with processing unit.Distinguish in main body both sides
A pair of of indent 18 is provided with, card slot 19 is additionally provided between two indents, is respectively arranged in the both sides of fixed ear and indent
Corresponding plate 20, on the inside of the fixed ear on be provided with cutting 21 corresponding with card slot, plate is inserted in indent during installation
Interior, cutting is inserted into and holding is in card slot.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology belonging to the present invention is led
The technical staff in domain can do various modifications or additions to described specific embodiment or replace in a similar way
Generation, but without departing from spirit of the invention or beyond the scope of the appended claims.
Although DC power supply, gird-connected inverter, grid-connected switch, on off state detection unit, electricity is used more herein
The terms such as detection unit are pressed, but it does not preclude the possibility of using other terms.The use of these items is only for more convenient
Ground describes and explains the essence of the present invention；Being construed as any one of the additional limitations is disagreed with spirit of the present invention
's.
Claims (7)
1. a kind of anti-isolated island alarm device of grid-connected system, grid-connected system includes gird-connected inverter, is connected on combining inverter input end
DC power supply, the grid-connected switch that is connected between gird-connected inverter output terminal and power grid, it is characterised in that：Device includes being used for
The voltage detection unit of grid voltage change is detected, to the on off state detection unit that grid-connected switch on and off is detected, according to
Grid-connected switch and network voltage information judge the processing unit of island effect, carry out the alarm of early warning to staff by short message
Unit, the voltage detection unit input terminal are connected between grid-connected switch and power grid on circuit, voltage detection unit output terminal
It is connected with processing unit, processing unit is connected with Alarm Unit, and Alarm Unit is connected with user mobile phone end.
2. a kind of anti-isolated island alarm device of grid-connected system according to claim 1, it is characterized in that having further included to power grid work
The frequency detecting unit that working frequency variation is detected, frequency detecting unit input terminal are connected to the top-stitching of grid-connected switch and power grid
On the road, frequency detecting unit output terminal connects on a processing unit.
3. a kind of anti-isolated island alarm device of grid-connected system according to claim 1, it is characterized in that the Alarm Unit includes
Warning information generation unit, number setting unit, short message sending unit, processing unit are connected with warning information generation unit, accuse
Alert information generating unit is connected respectively with number setting unit, short message sending unit.
4. the anti-isolated island alarm device of a kind of grid-connected system according to claim 1 it is characterized in that further including communication unit, is located
Reason unit is connected with communication unit, and communication unit is connected by network with cloud server end.
5. a kind of anti-isolated island alarm device of grid-connected system according to claim 1 or 2 or 3 or 4, it is characterized in that further including sound
Sound alarm unit, the audible alarm unit are connected on Alarm Unit.
6. a kind of anti-isolated island alarm device of grid-connected system according to claim 1 or 2 or 3 or 4, it is characterized in that including installation
Housing, installation housing include main body, and the front and rear opening of main body is installed front panel and rear panel, pacified respectively in installation housing both sides respectively
Equipped with for fixed ear, being provided with input button, display screen and warning light, input button, display screen, prompting on the front panel
Lamp is connected respectively with processing unit.
7. a kind of anti-isolated island alarm device of grid-connected system according to claim 6, it is characterized in that being set respectively in main body both sides
A pair of of indent is equipped with, card slot is additionally provided between two indents, is respectively arranged in the both sides of fixed ear corresponding with indent
Plate, on the inside of the fixed ear on be provided with the corresponding cutting of card slot, plate is inserted in indent during installation, cutting insertion
And holding is in card slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711147799.7A CN108051665A (en) | 2017-11-17 | 2017-11-17 | A kind of anti-isolated island alarm device of grid-connected system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711147799.7A CN108051665A (en) | 2017-11-17 | 2017-11-17 | A kind of anti-isolated island alarm device of grid-connected system |
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| CN108051665A true CN108051665A (en) | 2018-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711147799.7A Pending CN108051665A (en) | 2017-11-17 | 2017-11-17 | A kind of anti-isolated island alarm device of grid-connected system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113936437A (en) * | 2021-09-30 | 2022-01-14 | 国网山东省电力公司淄博供电公司 | Anti-islanding automatic alarm device |
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| CN102255330A (en) * | 2011-04-19 | 2011-11-23 | 河南电力试验研究院 | Device and method for detecting island of micro power grid system |
| CN103887811A (en) * | 2013-11-04 | 2014-06-25 | 汤奕 | Distributed power supply system and control method with low voltage ride through and anti-islanding protective functions |
| CN104678150A (en) * | 2013-12-03 | 2015-06-03 | 青岛博利尔机械设备有限公司 | Power detection alarm system of equipment |
| CN205957081U (en) * | 2016-06-24 | 2017-02-15 | 朱向阳 | A framing component for LED lamps and lanterns lamp decoration |
| CN207588562U (en) * | 2017-11-17 | 2018-07-06 | 国家电网公司 | The anti-isolated island alarm device of grid-connected system |
-
2017
- 2017-11-17 CN CN201711147799.7A patent/CN108051665A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255330A (en) * | 2011-04-19 | 2011-11-23 | 河南电力试验研究院 | Device and method for detecting island of micro power grid system |
| CN103887811A (en) * | 2013-11-04 | 2014-06-25 | 汤奕 | Distributed power supply system and control method with low voltage ride through and anti-islanding protective functions |
| CN104678150A (en) * | 2013-12-03 | 2015-06-03 | 青岛博利尔机械设备有限公司 | Power detection alarm system of equipment |
| CN205957081U (en) * | 2016-06-24 | 2017-02-15 | 朱向阳 | A framing component for LED lamps and lanterns lamp decoration |
| CN207588562U (en) * | 2017-11-17 | 2018-07-06 | 国家电网公司 | The anti-isolated island alarm device of grid-connected system |
Non-Patent Citations (1)
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| 罗先进等: "《新能源利用技术》", 31 December 2014 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113936437A (en) * | 2021-09-30 | 2022-01-14 | 国网山东省电力公司淄博供电公司 | Anti-islanding automatic alarm device |
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Application publication date: 20180518 |