CN107395120A - The fault detection method and photovoltaic generating system of a kind of safety device - Google Patents
The fault detection method and photovoltaic generating system of a kind of safety device Download PDFInfo
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- CN107395120A CN107395120A CN201710796624.2A CN201710796624A CN107395120A CN 107395120 A CN107395120 A CN 107395120A CN 201710796624 A CN201710796624 A CN 201710796624A CN 107395120 A CN107395120 A CN 107395120A
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- 238000001514 detection method Methods 0.000 title claims abstract description 30
- 238000012360 testing method Methods 0.000 claims abstract description 14
- 238000004891 communication Methods 0.000 claims description 10
- 230000007257 malfunction Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005713 exacerbation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
-
- 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
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- Inverter Devices (AREA)
Abstract
The invention provides a kind of fault detection method of safety device and photovoltaic generating system, the fault detection method is applied to photovoltaic generating system, the triggering command of safety device self-test is obtained first, control safety device is closed, then, whether the input terminal voltage and output end voltage for judging safety device meet the first preparatory condition, if not, sending warning message.If it is, control safety device is off state, and judge whether the input terminal voltage of safety device and output end voltage meet the second preparatory condition, if it is, determining safety device for the state that do not break down.It can be seen that the safety device in this programme can carry out self-test, when a failure occurs it, alert, to user to warn, the security performance of photovoltaic inverting system is improved.
Description
Technical field
The present invention relates to field of photovoltaic power generation, more particularly to a kind of fault detection method of safety device and photovoltaic generation system
System.
Background technology
Constantly raised in global energy requirements, traditional energy is held at high price and environmental problem attention rate is constantly lifted
Background under, global photovoltaic industry and solar energy market are just rapidly grown up.
Photovoltaic generation has become the part in national energy structure, and proportion can step up, but with
The continuous expansion of photovoltaic industry, the probability that accident occurs also are being continuously increased.
Specifically, the photovoltaic array of series connection has very high voltage, in order to improve photovoltaic system safety, it is necessary to be sent out in photovoltaic
Safety device (SD, Safe device) is set in electric system, equipment, power optimization device are such as rapidly switched off, in voltage or electric current
When transfiniting so that photovoltaic generating system rapidly switches off, and then causes the voltage drop between component and component, between component and bus
Low, voltage is no more than the security value (s) defined between ensureing a range of energized conductor.
But inventor has found that if turn-off function breaks down, component will be unable to turn off, and then can cause personal safety
Harm, therefore it provides a kind of fault detection method of safety device, it is ensured that send police when safety device is in faults itself
Report, is those skilled in the art's big technical barrier urgently to be resolved hurrily.
The content of the invention
In view of this, the invention provides a kind of fault detection method of safety device in photovoltaic generating system, safety is worked as
Device sends alarm in faults itself, improves the security of photovoltaic inverting system.
In view of this, the invention provides
A kind of fault detection method of safety device, applied to photovoltaic generating system, including：
The triggering command of safety device self-test is obtained, controls the safety device in running order；
Whether the input terminal voltage and output end voltage for judging the safety device meet the first preparatory condition, if not,
Send warning message；
If not, control the safety device to be off state, and judge the input terminal voltage of the safety device with
And whether the output end voltage meets the second preparatory condition, if it is, determining the safety device as the state that do not break down.
Optionally, in addition to：
When the input terminal voltage of the safety device and the output end voltage are unsatisfactory for the second preparatory condition, control
The safety device opens power consumption module；
After preset time arrival, judge whether the input terminal voltage of the safety device and the output end voltage are full
The second preparatory condition of foot, if it is, determining that the safety device is the state that do not break down, if not, determining the safety dress
Malfunction is set to, sends warning message.
Optionally, whether the input terminal voltage for judging the safety device meets the first default bar with output end voltage
Part, including：
Obtain the input terminal voltage and output end voltage of the safety device；
Judge whether the input terminal voltage and the absolute value of the difference of the output end voltage are less than the first predeterminated voltage
Value.
Optionally, whether the input terminal voltage for judging the safety device and the output end voltage meet second
Preparatory condition, including：
Obtain the input terminal voltage and output end voltage of the safety device；
Judge whether the input terminal voltage and the absolute value of the difference of the output end voltage are more than the second predeterminated voltage
Value.
Optionally, the control safety device opens power consumption module, including：
The power consumption module is opened according to predeterminated frequency, to reduce the voltage of the input of the safety device.
A kind of photovoltaic generating system, including：
Photovoltaic module；
Safety device, input are connected with the output end of the photovoltaic module, and the safety device includes fault detect mould
Block, the fault detection module detect the input terminal voltage and output end voltage of the safety device, when input electricity
When pressure and the output end voltage are unsatisfactory for the first preparatory condition, warning message is sent；
Inverter, it is connected between output end and the power network of the safety device.
Optionally, in addition to：
Communication module, the communication module are connected between the fault detection module and default client, by the report
Alert information is sent to the client.
Optionally, the safety device is additionally operable to：
When the input terminal voltage of the safety device meets the first preparatory condition with output end voltage, the safety is controlled
Device is off state；
And judge whether the input terminal voltage of the safety device and the output end voltage meet the second preparatory condition,
If it is, the safety device is determined as the state that do not break down.
Optionally, the safety device is additionally operable to：
When the input terminal voltage of the safety device and the output end voltage are unsatisfactory for the second preparatory condition, control
The safety device opens power consumption module；
After preset time arrival, judge whether the input terminal voltage of the safety device and the output end voltage are full
The second preparatory condition of foot, if it is, determining that the safety device is the state that do not break down, if not, determining the safety dress
Malfunction is set to, sends warning message.
From such scheme, the invention provides a kind of fault detection method of safety device, applied to photovoltaic generation
System, the triggering command of safety device self-test is obtained first, controls the safety device in running order, then, judges institute
Whether the input terminal voltage and output end voltage for stating safety device meet the first preparatory condition, if not, sending warning message.Such as
Fruit is that control safety device is off state, and judges whether the input terminal voltage of safety device and output end voltage are full
The second preparatory condition of foot, if it is, determining safety device for the state that do not break down.It can be seen that the safety device in this programme can
Self-test is carried out, when a failure occurs it, alert, to user to warn, improves the security performance of photovoltaic inverting system.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of schematic flow sheet of the fault detection method of safety device provided by the invention；
Fig. 2 is a kind of another schematic flow sheet of the fault detection method of safety device provided by the invention；
Fig. 3 is a kind of another schematic flow sheet of the fault detection method of safety device provided by the invention；
Fig. 4 is a kind of another schematic flow sheet of the fault detection method of safety device provided by the invention；
Fig. 5 is a kind of implementation schematic diagram for carrying out periodicity power consumption operation provided by the invention；
Fig. 6 is a kind of structural representation of photovoltaic generating system provided by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Referring to Fig. 1, the flow that Fig. 1 is a kind of fault detection method of safety device provided in an embodiment of the present invention is illustrated
Figure, the fault detection method are applied to photovoltaic generating system, including step：
S11, the triggering command for obtaining safety device self-test, control the safety device in running order.
Wherein, the triggering command of safety device can have a variety of embodiment modes, and if safety device is in electrifying startup, this is opened
Dynamic instruction can characterize the triggering command of safety device self-test.Except this, triggering command can also be based on the operation of user and touch
Hair, such as, photovoltaic generating system is in operation, and now testing staff triggers the triggering command of a safety device, control manually
Safety device carries out self-test.
Schematically,
Scene one：When safety device obtains electricity every time opens machine, Auto-Sensing Mode can be initially entered, judges whether hardware event
Barrier, does not need external command now, is performed automatically after safety device obtains electricity.
Scene two：Before inverter startup is grid-connected, self-checking command can be issued, starts the self-test work(of safety device successively
Can, this situation is applied to after maintenance, or after the shutdown of other reasonses, inverter is again grid-connected, and now safety device is simultaneously
Non- power-off restarting, but Auto-Sensing Mode can be started, it is ensured that the reliability of each grid-connected preceding safety device.
Generally, safety device includes two states, first, closing RSD functions, i.e., safety device is in normal work work,
Second, enabling RSD functions, i.e. safety device is off state.
Whether S12, the input terminal voltage for judging the safety device and output end voltage meet the first preparatory condition, if
It is no, send warning message.
Specifically, whether present embodiments provide a kind of input terminal voltage for judging the safety device and output end voltage
Meet the specific implementation step of the first preparatory condition, as shown in Fig. 2 including step：
S21, the input terminal voltage and output end voltage for obtaining the safety device；
S22, judge whether the input terminal voltage and the absolute value of the difference of the output end voltage are default less than first
Magnitude of voltage.
Schematically, after safety device enters Auto-Sensing Mode, RSD functions are first shut off, and detect current output voltage
Vo1 and input voltage vin 1, judge whether its pressure difference is less than predeterminated voltage Vth1.Safety device after closing RSD functions in theory
In running order or fixed chopping mode, both sides voltage difference is given value, if being unsatisfactory for condition, illustrates that device is deposited
In failure, warning is provided.
S13, if not, controlling the safety device to be off state.
Whether S14, the input terminal voltage for judging the safety device and the output end voltage meet the second default bar
Part, if it is, determining the safety device as the state that do not break down.
Wherein, a kind of input terminal voltage for judging the safety device and the output end voltage are present embodiments provided
Whether the specific implementation step of second preparatory condition is met, as shown in figure 3, including step：
S31, the input terminal voltage and output end voltage for obtaining the safety device；
S32, judge whether the input terminal voltage and the absolute value of the difference of the output end voltage are default more than second
Magnitude of voltage.
Schematically, if meeting step S12, further, control the safety device to enter off state, pass through
After one section of delay, output voltage Vo2 is detected, input voltage vin 2 judges whether two voltage differences are more than Vth2；If satisfied,
The hardware for then thinking the safety device is normal, if being unsatisfactory for condition, can't think that the device has failure completely, former
Because be if external circuit in system by the output voltage clamper of the device in some value, the value is just close with input,
Therefore condition will be allowed invalid, but this can not illustrate that equipment certainly exists failure.
Therefore, in the case where above-mentioned condition is invalid, further, increase the power consumption of safety device, such as open ring arteries and veins
Punching, MCU is enabled and operates peripheral hardware, enabled communication module etc., drags down the voltage of input side PV components by the exacerbation of load, then sentence
Whether disconnected input and output voltage meets condition, if satisfied, then judging that safety device is normal, if not satisfied, then safety device is present
Failure.
I.e. on the basis of step S14, as shown in figure 4, also including step：
S15, when the input terminal voltage of the safety device and the output end voltage are unsatisfactory for the second preparatory condition,
The safety device is controlled to open power consumption module；
S16, preset time arrival after, the input terminal voltage and the output end voltage that judge the safety device are
The second preparatory condition of no satisfaction, if it is, determining that the safety device is the state that do not break down, if not, determining the peace
Full device is malfunction, sends warning message.
Wherein, the control safety device, which opens power consumption module, to be specially：Described in opening according to predeterminated frequency
Power consumption module, to reduce the voltage of the input of the safety device.
Schematically, as shown in figure 5, present embodiments providing a kind of implementation for carrying out periodicity power consumption operation, its
In, solid line represents the input voltage of safety device, and dotted line represents output voltage.Input voltage periodically changes, if output
Voltage is also periodically to change, then it is normal to illustrate device, if voltage is substantially stationary motionless, illustrates that device is present
Failure.
It should be noted that the above-mentioned plant failure judged, it may be possible to major loop device failure, or sampling electricity
Road failure, also either failure of device such as peripheral hardware, communication etc., any hardware fault can reflect that the device has in a word
Failure, potential safety hazard be present.
To sum up, the safety device in this programme can carry out self-test, when a failure occurs it, alert, to user
To warn, the security performance of photovoltaic inverting system is improved.
On the basis of above-described embodiment, the present embodiment additionally provides a kind of photovoltaic generating system, as shown in fig. 6, including：
Photovoltaic module 601, safety device 602 and inverter 603.
Wherein, the input of safety device 602 is connected with the output end of the photovoltaic module 601, the safety device bag
Include fault detection module (not shown), the fault detection module detects the input terminal voltage of the safety device and defeated
Go out terminal voltage, when the input terminal voltage and the output end voltage are unsatisfactory for the first preparatory condition, send warning message；
Inverter 603 is connected between output end and the power network 604 of the safety device 602.
Schematically, the input of photovoltaic module connecting safety device, photovoltaic group is formed after the series connection of safety device output end
String, multiple groups of connection in series-parallel, which are confluxed, accesses the input of inverter.The device uses PLC communication modes, before grid-connected inverters, is
System issues self-checking command, and after safety device receives self-checking command, safety device is first shut off RSD functions, now safety device
It is in running order, the input and output voltage of safety device, and comparison voltage size are detected, if voltage difference is in threshold range
Outside, then judge safety device failure, provide warning.
If voltage difference in threshold range, now there may be certain coincidence, it is necessary to determine whether.Enabled RSD work(
Can, safety device is entered off state, after one section of delay, then the difference of input and output voltage size is detected, if voltage
Difference is more than predetermined threshold value, then judges that safety device is normal；If voltage difference is less than predetermined threshold value, control safety device increase
Power consumption, such as open ring pulse, MCU is enabled and operates peripheral hardware, enabled communication module.Due to the increase of power consumption, input voltage meeting
Reduce, now input and output voltage detected again, if voltage difference is more than predetermined threshold value, judge that safety device is normal,
If voltage difference is less than predetermined threshold value, judges safety device failure, provide warning.
Except this, the photovoltaic generating system that the present embodiment provides, in addition to：Communication module, the communication module are connected to institute
State between fault detection module and default client, the warning message is sent to the client.
Optionally, the safety device is additionally operable to：
When the input terminal voltage of the safety device meets the first preparatory condition with output end voltage, the safety is controlled
Device is in opening；
And judge whether the input terminal voltage of the safety device and the output end voltage meet the second preparatory condition,
If it is, the safety device is determined as the state that do not break down.
In addition to the implementation, the safety device that the present embodiment provides is additionally operable to：
When the input terminal voltage of the safety device and the output end voltage are unsatisfactory for the second preparatory condition, control
The safety device opens power consumption module；
After preset time arrival, judge whether the input terminal voltage of the safety device and the output end voltage are full
The second preparatory condition of foot, if it is, determining that the safety device is the state that do not break down, if not, determining the safety dress
Malfunction is set to, sends warning message.
In summary：The invention provides a kind of fault detection method of safety device and photovoltaic generating system, the event
Barrier detection method is applied to photovoltaic generating system, obtains the triggering command of safety device self-test first, controls the safety device
It is closed, then, judges whether the input terminal voltage of the safety device and output end voltage meet the first default bar
Part, if not, sending warning message.If it is, control safety device is off state, and judge the input of safety device
Whether voltage and output end voltage meet the second preparatory condition, if it is, determining safety device for the state that do not break down.Can
The safety device seen in this programme can carry out self-test, when a failure occurs it, alert, to user to warn, improve
The security performance of photovoltaic inverting system.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be with it is other
The difference of embodiment, between each embodiment same or similar part mutually referring to.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (9)
- A kind of 1. fault detection method of safety device, applied to photovoltaic generating system, it is characterised in that including：The triggering command of safety device self-test is obtained, controls the safety device in running order；Whether the input terminal voltage and output end voltage for judging the safety device meet the first preparatory condition, if not, sending Warning message；If it is, controlling the safety device to be off state, and judge input terminal voltage and the institute of the safety device State whether output end voltage meets the second preparatory condition, if it is, determining the safety device as the state that do not break down.
- 2. fault detection method according to claim 1, it is characterised in that also include：When the input terminal voltage of the safety device and the output end voltage are unsatisfactory for the second preparatory condition, described in control Safety device opens power consumption module；After preset time arrival, judge the input terminal voltage of the safety device and whether the output end voltage meets the Two preparatory conditions, if it is, determining that the safety device is the state that do not break down, if not, determining that the safety device is Malfunction, send warning message.
- 3. fault detection method according to claim 1, it is characterised in that the input for judging the safety device Whether voltage meets the first preparatory condition with output end voltage, including：Obtain the input terminal voltage and output end voltage of the safety device；Judge whether the input terminal voltage and the absolute value of the difference of the output end voltage are less than the first preset voltage value.
- 4. fault detection method according to claim 1, it is characterised in that the input for judging the safety device Whether voltage and the output end voltage meet the second preparatory condition, including：Obtain the input terminal voltage and output end voltage of the safety device；Judge whether the input terminal voltage and the absolute value of the difference of the output end voltage are more than the second preset voltage value.
- 5. fault detection method according to claim 2, it is characterised in that the control safety device opens power consumption Module, including：The power consumption module is opened according to predeterminated frequency, to reduce the voltage of the input of the safety device.
- A kind of 6. photovoltaic generating system, it is characterised in that including：Photovoltaic module；Safety device, input are connected with the output end of the photovoltaic module, and the safety device includes fault detection module, institute State input terminal voltage and output end voltage that fault detection module detects the safety device, when the input terminal voltage and When the output end voltage is unsatisfactory for the first preparatory condition, warning message is sent；Inverter, it is connected between output end and the power network of the safety device.
- 7. photovoltaic generating system according to claim 6, it is characterised in that also include：Communication module, the communication module are connected between the fault detection module and default client, by the alarm signal Breath is sent to the client.
- 8. photovoltaic generating system according to claim 7, it is characterised in that the safety device is additionally operable to：When the input terminal voltage of the safety device meets the first preparatory condition with output end voltage, the safety device is controlled It is off state；And judge whether the input terminal voltage of the safety device and the output end voltage meet the second preparatory condition, if It is to determine that the safety device is the state that do not break down.
- 9. photovoltaic generating system according to claim 8, it is characterised in that the safety device is additionally operable to：When the input terminal voltage of the safety device and the output end voltage are unsatisfactory for the second preparatory condition, described in control Safety device opens power consumption module；After preset time arrival, judge the input terminal voltage of the safety device and whether the output end voltage meets the Two preparatory conditions, if it is, determining that the safety device is the state that do not break down, if not, determining that the safety device is Malfunction, send warning message.
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| CN201710796624.2A CN107395120B (en) | 2017-09-06 | 2017-09-06 | Fault detection method of safety device and photovoltaic power generation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710796624.2A CN107395120B (en) | 2017-09-06 | 2017-09-06 | Fault detection method of safety device and photovoltaic power generation system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110824301A (en) * | 2018-08-11 | 2020-02-21 | 代傲阿扣基金两合公司 | Method for detecting insulation fault and motor phase interruption and driving circuit |
| CN112782497A (en) * | 2019-11-11 | 2021-05-11 | 阳光电源股份有限公司 | Arc detection device and self-detection method thereof |
| CN115174639A (en) * | 2022-09-07 | 2022-10-11 | 吉林信息安全测评中心 | Industrial equipment management method and system based on Internet of things |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630832A (en) * | 2012-08-27 | 2014-03-12 | 特变电工新疆新能源股份有限公司 | Power-on self-detection method and device of switch piece in electric power electronic device |
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2017
- 2017-09-06 CN CN201710796624.2A patent/CN107395120B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630832A (en) * | 2012-08-27 | 2014-03-12 | 特变电工新疆新能源股份有限公司 | Power-on self-detection method and device of switch piece in electric power electronic device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110824301A (en) * | 2018-08-11 | 2020-02-21 | 代傲阿扣基金两合公司 | Method for detecting insulation fault and motor phase interruption and driving circuit |
| CN110824301B (en) * | 2018-08-11 | 2024-04-09 | 代傲阿扣基金两合公司 | Method for detecting insulation faults, motor phase interruption and drive circuit |
| CN112782497A (en) * | 2019-11-11 | 2021-05-11 | 阳光电源股份有限公司 | Arc detection device and self-detection method thereof |
| CN115174639A (en) * | 2022-09-07 | 2022-10-11 | 吉林信息安全测评中心 | Industrial equipment management method and system based on Internet of things |
| CN115174639B (en) * | 2022-09-07 | 2022-12-06 | 吉林信息安全测评中心 | Industrial equipment management method and system based on Internet of things |
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| CN107395120B (en) | 2020-01-21 |
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