CN202282729U - Emergency stop circuit of photovoltaic inverter - Google Patents
Emergency stop circuit of photovoltaic inverter Download PDFInfo
- Publication number
- CN202282729U CN202282729U CN 201120400875 CN201120400875U CN202282729U CN 202282729 U CN202282729 U CN 202282729U CN 201120400875 CN201120400875 CN 201120400875 CN 201120400875 U CN201120400875 U CN 201120400875U CN 202282729 U CN202282729 U CN 202282729U
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- China
- Prior art keywords
- isolator
- inverter
- emergency stop
- stop circuit
- controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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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- Inverter Devices (AREA)
Abstract
The present utility model discloses an emergency stop circuit of a photovoltaic inverter, and the circuit belongs to the low voltage electrical technology field. The emergency stop circuit comprises a scram button, an isolator, an isolator working power supply, a controller and a shunt release, the scream button is provided with two groups of contacts with same or opposite contacting states, wherein one group of contacts is connected with a loop formed by the isolator and the isolator working power supply, the other group of contacts is connected with a power supply loop of the shunt release, and a signal input end of the controller is connected with an output end of the isolator of the emergency stop circuit. Compared with the prior art, the phenomenon that when software of the inverter is in disorder, the inverter can not be stopped timely can be prevented, and an electrical network will not be impacted and the inverter will not be damaged when the inverter is closed again, and correct state indication of the inverter can be provided.
Description
Technical field
The utility model relates to a kind of emergency stop circuit, relates in particular to a kind of emergency stop circuit of photovoltaic DC-to-AC converter, belongs to the low-voltage electrical technical field.
Background technology
Along with the continuous minimizing of resources such as oil, coal, and the severe situation of global warming, renewable natural energy resources such as the solar energy that environmental protection and reserves are extremely abundant, wind energy more and more receive people's favor.In the recent period along with development of technology; Utilize solar energy to carry out photovoltaic generation also more and more widely; Like this fail safe of photovoltaic inversion device is also had higher requirement; On powerful photovoltaic inversion device, will consider the installation emergency stop push button mostly, so that when destructive fault occurring, inverter is quit work.In existing inverter, the method that realizes this emergency stop function is mainly utilizes emergency stop push button control AC side major loop contactor or circuit breaker to force to break off, and inverter output is stopped.
But there is following shortcoming in prior art: when inverter breaks off AC side major loop contactor or circuit breaker through pressure; Inverter inside is also in work; Major loop contactor or circuit breaker prime still have voltage output, can have electrical network when closing a floodgate again and impact or the damage inverter, simultaneously when inverter promptly quits work; Internal control software possibly can't judge what state inverter is in and causes reporting by mistake fault type; As possibly report by mistake and be can mislead the repairman like this by isolated island, influenced the solution of problem.
The utility model content
The utility model technical problem to be solved is to overcome existing existing in prior technology safety issue, and a kind of more emergency stop circuit of the photovoltaic DC-to-AC converter of high safety reliability that has is provided.
The following technical scheme of the concrete employing of the utility model:
A kind of emergency stop circuit of photovoltaic DC-to-AC converter comprises scram button, isolator, isolator working power, controller and shunt release; Said scram button has the identical or opposite contact of two groups of contact states, and wherein one group of contact inserts in isolator and the formed loop of isolator working power, and other one group of contact inserts in the current supply circuit of said shunt release; The signal input part of said controller is connected with the output of isolator in the emergency stop circuit.
Preferably, said isolator is an optical coupling isolator.
When using the emergency stop circuit of the utility model, shunt release is inserted in the AC side loop of photovoltaic DC-to-AC converter, the output of controller is connected with the control end of photovoltaic DC-to-AC converter.When pressing emergency stop push button, on the one hand, the current supply circuit of shunt release is connected, and the shunt release action is broken off the AC side loop; On the other hand, the power turn-on of isolator or disconnection, thus make the isolator output produce a washout (variation of high-low level), controller is received washout, promptly control inverter stops output.
Further, the emergency stop circuit of the utility model also comprise be electrically connected with said controller promptly stop warning device.Thereby can detect washout at controller, when control inverter stops to export, send alarm signals such as sound, light.
Compare prior art, the utility model is realized the disconnection of photovoltaic DC-to-AC converter AC side simultaneously through the scram button with two groups of contacts, and to controller washout is provided, and control inverter stops output.Prevented that not only the phenomenon that can not in time stop inverter when entanglement appears in inverter software from occurring; When having prevented that also inverter from closing a floodgate again, electrical network is impacted or damages inverter; Also can provide inverter correct state indication.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the utility model;
Fig. 2 is the structural representation of another embodiment of the utility model.
Embodiment
Be elaborated below in conjunction with the technical scheme of accompanying drawing to the utility model:
An embodiment of the utility model is as shown in Figure 1; Comprise shunt release 5, the shunt release power supply 6 of controller 1, isolator 2, scram button 3, isolator working power 4, AC side circuit breaker, and be electrically connected with controller 1 promptly stop the warning device (not shown); Scram button 3 has two groups of mushroom head contacts 31 and 32, and contact 31 and 32 contact condition are opposite, and promptly two contacts always keep a connection, another disconnection; One end of contact 32 1 termination shunt release power supplys 6, the other end is connected with an input of shunt release 5, and another input of shunt release 5 is connected with the other end of shunt release power supply 6; Contact 31 1 ends are connected with the positive pole of power supply 4; The other end is connected with the input anode of isolator 2 through resistance R 2; Isolator 2 the other end be connected with the negative pole of power supply 4, the output of isolator 2 is connected with the I/O mouth of controller 1 after through a pull-up resistor R1.In the present embodiment, it is the digital signal processor of TMS320F2811 that controller 1 adopts model; It is the optical coupling isolator of TLP181 that isolator 2 adopts model, and its working power is DC24V; The shunt release power supply is AC380V.After scram button 3 was pressed, circuit breaker shunt release power supply 6 was connected in the contact 32 of scram button 3, made shunt release 5 actions of AC side circuit breaker; Force inverter and electrical network to break off, another group contact 31 of scram button 3 is broken off simultaneously, the optocoupler input power down in the optical coupling isolator 2; The I/O port level of control chip is changed; Be changed to high level by low level, the signal that controller 1 is promptly stopped, control inverter stop output; Export urgent halted state indication simultaneously, control promptly stops the warning device indication and reports to the police.
Another embodiment of the utility model is as shown in Figure 2, and wherein contact 31 is identical with 32 contact condition, and promptly two contacts always keep connecting simultaneously or break off simultaneously.All the other are all identical with a last embodiment.As shown in Figure 2, after scram button 3 was pressed, circuit breaker shunt release power supply 6 was connected in the contact 32 of scram button 3; Make shunt release 5 actions of AC side circuit breaker, force inverter and electrical network to break off, simultaneously another group contact 31 closures of scram button 3; Optocoupler input in the optical coupling isolator 2 powers on, and the I/O port level of controller 1 is changed, and is changed to low level by high level; The signal that controller 1 is promptly stopped; Control inverter stops output, exports urgent halted state indication simultaneously, and control promptly stops the warning device indication and reports to the police.
Claims (3)
1. the emergency stop circuit of a photovoltaic DC-to-AC converter is characterized in that, comprises scram button, isolator, isolator working power, controller and shunt release; Said scram button has the identical or opposite contact of two groups of contact states, and wherein one group of contact inserts in isolator and the formed loop of isolator working power, and other one group of contact inserts in the current supply circuit of said shunt release; The signal input part of said controller is connected with the output of isolator in the emergency stop circuit.
2. the emergency stop circuit of photovoltaic DC-to-AC converter according to claim 1 is characterized in that said isolator is an optical coupling isolator.
3. the emergency stop circuit of photovoltaic DC-to-AC converter according to claim 1 or claim 2 is characterized in that, its also comprise be electrically connected with said controller promptly stop warning device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120400875 CN202282729U (en) | 2011-10-20 | 2011-10-20 | Emergency stop circuit of photovoltaic inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120400875 CN202282729U (en) | 2011-10-20 | 2011-10-20 | Emergency stop circuit of photovoltaic inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202282729U true CN202282729U (en) | 2012-06-20 |
Family
ID=46228880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120400875 Expired - Lifetime CN202282729U (en) | 2011-10-20 | 2011-10-20 | Emergency stop circuit of photovoltaic inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202282729U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104362843A (en) * | 2014-10-24 | 2015-02-18 | 阳光电源股份有限公司 | Parallel inversion system, and shutdown control method and shutdown control device for parallel inversion system |
| TWI555304B (en) * | 2012-07-19 | 2016-10-21 | 達方電子股份有限公司 | Power trimmer for photovoltaic power system and method of operating a power trimmer |
| CN112614304A (en) * | 2020-12-30 | 2021-04-06 | 航天信息股份有限公司 | Method and system for self-service channel emergency evacuation control |
-
2011
- 2011-10-20 CN CN 201120400875 patent/CN202282729U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI555304B (en) * | 2012-07-19 | 2016-10-21 | 達方電子股份有限公司 | Power trimmer for photovoltaic power system and method of operating a power trimmer |
| CN104362843A (en) * | 2014-10-24 | 2015-02-18 | 阳光电源股份有限公司 | Parallel inversion system, and shutdown control method and shutdown control device for parallel inversion system |
| CN104362843B (en) * | 2014-10-24 | 2017-06-13 | 阳光电源股份有限公司 | Parallel inverter system and its halt control method and stop control apparatus |
| CN112614304A (en) * | 2020-12-30 | 2021-04-06 | 航天信息股份有限公司 | Method and system for self-service channel emergency evacuation control |
| CN112614304B (en) * | 2020-12-30 | 2023-01-17 | 航天信息股份有限公司 | Method and system for self-service channel emergency evacuation control |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120620 |
|
| CX01 | Expiry of patent term |