CN104300584B - High-security PID effect inhibition method - Google Patents
High-security PID effect inhibition method Download PDFInfo
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- CN104300584B CN104300584B CN201410623593.7A CN201410623593A CN104300584B CN 104300584 B CN104300584 B CN 104300584B CN 201410623593 A CN201410623593 A CN 201410623593A CN 104300584 B CN104300584 B CN 104300584B
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- inverter
- catalyst
- storage capacitor
- pid effect
- photovoltaic module
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- 230000000694 effects Effects 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title abstract description 15
- 230000005764 inhibitory process Effects 0.000 title abstract description 8
- 239000003990 capacitor Substances 0.000 claims abstract description 36
- 238000004146 energy storage Methods 0.000 claims abstract description 7
- 239000003054 catalyst Substances 0.000 claims description 32
- 230000001629 suppression Effects 0.000 claims description 22
- 230000002085 persistent effect Effects 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims description 4
- 210000004027 cell Anatomy 0.000 description 6
- 230000005611 electricity Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 210000003850 cellular structure Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
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- 238000011069 regeneration method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
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- H02J3/383—
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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)
- Protection Of Static Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention relates to a PID effect inhibition system and a PID effect inhibition method of a photovoltaic component. The PID effect inhibition system comprises a soft starting circuit, an inverter, an energy storage capacitance release loop and an earthing end PE, wherein a direct-current side switch, a bus capacitance component, a power module, an output filter, a grid connection contact and an AC circuit breaker are connected in series to form the inverter, wherein the soft starting circuit consisting of a fuse wire, a current limit resistor, a soft starting contactor and a rectifier bridge is connected at the alternative current circuit breaker on an alternative current side of the inverter; one end of an energy storage capacitor is connected with the earthing end PE; another end of the energy storage capacitor is connected with a direct current end of the inverter; a release contactor and a release resistor are serially connected with the earthing PE end of the energy storage capacitor; the release resistor is also connected with the direct current end of the inverter. The inhibition system and the inhibition method provided by the invention have the advantages of convenience, rapidness, easiness to achieve, good inhibition effect and high security and reliability.
Description
Technical field
The present invention relates to current potential induction decay (pid) effect suppression system of photovoltaic module and method, it is particularly useful at night
Between the pid effect of high-power photovoltaic inverter in photovoltaic plant is suppressed.
Background technology
At present, the topmost energy of the mankind is still non-regeneration energy, such as: the Fossil fuel such as coal, oil, natural gas,
These energy reserves are limited and use process serious environment pollution, caused serious energy environment issues.Solar energy is near
The emerging energy year rising, many advantages, such as have inexhaustible, environmentally safe, thus has obtained extensively making
With.However, research in recent years shows, it is present in the height between the circuit in Crystalline Silicon PV Module and its grounded metal frame
Voltage, can cause the continuous decrement of assembly photovoltaic performance, in the industry referred to as current potential induction decay (pid), lasting pid decay meeting
Reducing the output of photovoltaic cell component, reducing the permanent income of photovoltaic plant owner, thus causing most of owners and row
The increasing attention of industry expert.
Currently for the battery producer of photovoltaic module, suppress pid effect mainly from material, using non-na, ca glass
Glass is although safe and reliable, but relatively costly, and the stability of new material is not also verified for a long time.
Additionally, the method being grounded photovoltaic generating system is also used in suppressing pid effect in photovoltaic power station system, this
The transformation of method is generally carried out in inverter side, and basic skills is: inverter bus negative pole is directly grounded or connecting resistance ground connection.As
Chinese patent cn103490402a discloses a kind of photovoltaic module grounding device, and one end of described grounding device connects photovoltaic generation
System dc bus negative pole, the other end is grounded, and described grounding device adopts wire, resistance, the tandem junction of inductance, resistance and inductance
Structure or the parallel-connection structure of resistance and inductance.This kind of grounding device can achieve current potential induction decay (pid) effect to photovoltaic module
Suppression.
This disposal method simplicity, low cost, effect is significant, but minus earth can cause potential safety hazard, threatens power station
Normal operation and O＆M safety.After inverter minus earth, if generating assembly plus earth fault, cell panel short circuit can be caused,
And if operation maintenance personnel touches positive pole and shock hazard then can be occurred even fire to occur.
Cn103956970a discloses a kind of photovoltaic confluence device having anti-pid function concurrently, and it includes conflux circuit, voltage
Sample collection device, pid controller, voltage changer and DC source, each cathode output end of the circuit that confluxes simultaneously forms after connecing total
Cathode output end accesses DC cabinet or inverter, and each cathode output end of the circuit that confluxes simultaneously forms total cathode output end after connecing and accesses
DC cabinet or inverter.
Cn103973217a discloses a kind of device of suppression cell panel pid effect, and this device passes through voltage lifting circuit
Lifting photovoltaic plant rises the voltage-to-ground of AC neutral point, thus improving the voltage-to-ground of inverter prime cell panel, makes electricity
Pond plate is in positive bias over the ground, realizes the suppression to cell panel pid effect.
Cn103475208a discloses a kind of pid suppression circuit of photovoltaic system, comprising: pid suppressor and for for institute
State the power supply that pid suppressor is powered；Described pid suppressor includes: isolation sample circuit, pid controller and isolated variable electricity
Road；Described isolated variable circuit is connected with described power supply；Wherein, described isolation sample circuit is connected to described photovoltaic system
Between positive and negative electrode, for obtaining the sampled voltage signal of described photovoltaic system and sending described sampled voltage signal to described
Pid controller；Described pid controller is used for when determining described photovoltaic system according to described sampled voltage signal and not working,
The output head anode controlling described isolated variable circuit exports corresponding output voltage to the negative pole of described photovoltaic system；Described defeated
Going out voltage is just；The negative pole of output end ground connection of described isolated variable circuit.
Cn103956970a discloses a kind of photovoltaic confluence device having anti-pid function concurrently, and it includes conflux circuit, voltage
Sample collection device, pid controller, voltage changer and DC source, each cathode output end of the circuit that confluxes simultaneously forms after connecing total
Cathode output end accesses DC cabinet or inverter, and each cathode output end of the circuit that confluxes simultaneously forms total cathode output end after connecing and accesses
DC cabinet or inverter；Wherein, voltage sample catcher, its collection terminal respectively with total cathode output end of the circuit that confluxes and always bearing
Pole outfan is connected, and its signal output part is connected with the signal input part of pid controller；Voltage changer, its negative pole is defeated
Go out end ground connection, its cathode output end is connected with total cathode output end of the circuit that confluxes；DC source, its respectively with voltage transformation
The electrode input end of device is connected with negative input；The opening and closing signal of pid controller, its signal output part and voltage changer
Input is connected.
Content of the invention
Present invention is primarily targeted at providing a kind of photovoltaic module pid effect suppression system and method, have convenient fast
It is prompt, it is easy to accomplish, pid inhibition is good, and safety and reliability have be greatly improved excellent compared to " minus earth scheme "
Point.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of photovoltaic module pid effect suppression system, comprising:
Soft starting circuit, including: soft open catalyst, rectifier bridge, fuse insures, current-limiting resistance；
Inverter, including: DC side switch, bus capacitor assembly, power model, output filter, grid-connected contact
Device, AC circuit breaker；
Storage capacitor bleed-off circuit, including: storage capacitor, catalyst of releasing, bleeder resistance；
Earth terminal pe；
DC side switch, bus capacitor assembly, power model, output filter, grid-connected catalyst and AC circuit breaker string
It is unified into inverter, connect by fuse insurance, current-limiting resistance at the AC circuit breaker of inverter ac side, soft open catalyst and rectification
The soft starting circuit that bridge is constituted, the direct current electrical connection storage capacitor after rectified bridge rectification, storage capacitor one end is grounded pe, one end
Be connected with inverter DC terminal, release catalyst and bleeder resistance is connected on storage capacitor ground connection pe end, bleeder resistance also with inverse
Become device DC terminal to connect.
Rectifier bridge adopts three-phase commutation bridge, also can be replaced diode, and power model adopts igbt, and output filter adopts
Lc wave filter and emi wave filter.
It is worked at night for photovoltaic plant.
Using the suppressing method of described photovoltaic module pid effect suppression system, photovoltaic plant light is weaker, at inverter
In holding state, grid-connected catalyst disconnects, if cell voltage is detected to be less than 100vdc, and the persistent period reaches 1 hour, now
Soft open catalyst closure, AC soft starting circuit works, by rectifier bridge to storage capacitor energy storage, when storage capacitor is detected
When both end voltage reaches 500vdc, disconnection is soft to open catalyst.
After certain time, storage capacitor is discharged to voltage and reaches desired Safety value, afterwards by closure catalyst of releasing
Enter holding state, enter second day early morning opens the machine logical judgment stage.
During overnight maintenance, catalyst closure of releasing can be discharged by bleeder resistance, so that storage capacitor voltage is reached
To below desired Safety value.
The described persistent period is 6 hours.
Described voltage desired Safety value is 24v.
The pid effect suppression system of the present invention and method, between negative pole and ground plus a positive field method, can be
While providing the suppression of pid effect, more succinctly, safety and reliability, eliminate the safety of current main flow minus earth scheme
Hidden danger, overcome the defect of prior art.
Brief description
Fig. 1 is photovoltaic module pid effect suppression system schematic diagram of the present invention；
Fig. 2 is the grid-connected synchronous flow chart of photovoltaic module pid effect suppressing method of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the principle and feature of the present invention is clearly and completely retouched
State it is clear that described embodiment is served only for explaining the present invention, be not intended to limit the scope of the present invention.
According to an embodiment of the invention, as shown in figure 1, the photovoltaic module pid effect suppression system of the present invention, bag
Include:
AC soft starting circuit, including: soft open catalyst 3, rectifier bridge 4, fuse insurance 1, current-limiting resistance 2；
Inverter, including: DC side switch 11, bus capacitor assembly 13, power model 10, output filter 9, and
Net catalyst 8, AC circuit breaker 12；
Storage capacitor bleed-off circuit, including: storage capacitor 5, catalyst 6 of releasing, bleeder resistance 7；
Earth terminal pe；
Wherein, rectifier bridge 4 adopts three-phase commutation bridge, also can be replaced diode, and power model 10 adopts igbt, output filter
Ripple device 9 adopts lc wave filter and emi wave filter.
DC side switch 11, bus capacitor assembly 13, power model 10, output filter 9, grid-connected catalyst 8, exchange is disconnected
Road device 12 inverter in series, connects fuse insurance 1, the current-limiting resistance of soft starting circuit at the AC circuit breaker 12 of inverter
2nd, soft open catalyst 3, rectifier bridge 4, after rectification direct current electrical connection storage capacitor 5, storage capacitor 5 one end be grounded pe, one end with inverse
Become device DC terminal to connect, release catalyst 6 and bleeder resistance 7 is connected on storage capacitor 5 ground connection pe end, bleeder resistance 7 also connects
In inverter DC terminal.
As shown in Fig. 2 the photovoltaic module pid effect suppressing method of the present invention includes:
Photovoltaic plant light is weaker, such as, during night, grid-connected catalyst 8 disconnects, and inverter is in holding state, if detection
It is less than 100vdc to cell voltage, and the persistent period reaches 1 hour, the now soft catalyst 3 that opens closes, AC soft starting circuit
Work, gives storage capacitor 5 energy storage by rectifier bridge 4, when storage capacitor 5 both end voltage is detected and reaching 500vdc, disconnects soft
Open catalyst 3.
Now, have a positive electric field between the negative pole of battery component and ground, suppression na ion to battery cathode shifting
Dynamic, thus in the Surface Polarization phenomenon of suppression battery component, the output decay of suppression photovoltaic module, can effectively suppress pid
The impact to battery component for the effect.
After certain time, such as after 6 hours, storage capacitor 5 is discharged to voltage and reaches ideal by closure catalyst 6 of releasing
Safety value, such as below 24v, enter holding state afterwards, and enter second day early morning opens the machine logical judgment stage.
During overnight maintenance, catalyst 6 of releasing can be closed, be discharged by bleeder resistance 7, make storage capacitor 5 electricity
Pressure reaches desired Safety value, such as below 24v.
Described above be merely exemplary for the purpose of the present invention, and nonrestrictive, those of ordinary skill in the art understand,
In the case of the spirit and scope being limited without departing from claims appended below, many modifications, change or equivalent can be made,
But fall within protection scope of the present invention.
Claims (7)
1. a kind of photovoltaic module pid effect suppression system, comprising:
Soft starting circuit, including: soft open catalyst (3), rectifier bridge (4), fuse insures (1), current-limiting resistance (2)；
Inverter, including: DC side switch (11), bus capacitor assembly (13), power model (10), output filter
(9), grid-connected catalyst (8), AC circuit breaker (12)；
Storage capacitor bleed-off circuit, including: storage capacitor (5), catalyst of releasing (6), bleeder resistance (7)；
Earth terminal pe；
DC side switch (11), bus capacitor assembly (13), power model (10), output filter (9), grid-connected catalyst (8)
And AC circuit breaker (12) is connected into inverter, AC circuit breaker (12) place of inverter ac side connect by fuse insurance (1),
Current-limiting resistance (2), soft open catalyst (3) and soft starting circuit that rectifier bridge (4) is constituted, the direct current after the rectification of rectified bridge (4)
Electrical connection storage capacitor (5), storage capacitor (5) one end is grounded pe, and one end is connected with inverter DC terminal, catalyst of releasing (6)
It is connected on storage capacitor (5) ground connection pe end with bleeder resistance (7), bleeder resistance (7) is also connected with inverter DC terminal,
Wherein, when photovoltaic plant light is weaker, inverter is in holding state, and grid-connected catalyst (8) disconnects, if battery is detected
Voltage is less than 100vdc, and the persistent period reaches 1 hour, and the now soft catalyst (3) that opens closes, AC soft starting circuit work
Make, give storage capacitor (5) energy storage by rectifier bridge (4), when storage capacitor (5) both end voltage is detected and reaching 500vdc, break
Open and soft open catalyst (3).
2. photovoltaic module pid effect suppression system according to claim 1, wherein, rectifier bridge (4) adopts three-phase commutation bridge
Or replacing with diode, power model (10) adopts igbt, and output filter (9) adopts lc wave filter and emi wave filter.
3. photovoltaic module pid effect suppression system according to claim 1, it is worked at night for photovoltaic plant.
4. photovoltaic module pid effect suppression system according to claim 1, wherein, after certain time, closure is released
Storage capacitor (5) is discharged to voltage and reaches desired Safety value by catalyst (6), enters holding state afterwards, enters second day clearly
Morning open the machine logical judgment stage.
5. photovoltaic module pid effect suppression system according to claim 4, wherein, during overnight maintenance, catalyst of releasing
(6) close, discharged by bleeder resistance (7), make storage capacitor (5) voltage reach below desired Safety value.
6. photovoltaic module pid effect suppression system according to claim 4, wherein, the persistent period is 6 hours.
7. photovoltaic module pid effect suppression system according to claim 4, wherein, voltage desired Safety value is 24v.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410623593.7A CN104300584B (en) | 2014-11-07 | 2014-11-07 | High-security PID effect inhibition method |
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| CN201410623593.7A CN104300584B (en) | 2014-11-07 | 2014-11-07 | High-security PID effect inhibition method |
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| CN104300584B true CN104300584B (en) | 2017-02-01 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105915172B (en) | 2016-05-11 | 2017-12-22 | 阳光电源股份有限公司 | A kind of apparatus and system for suppressing potential induction attenuation |
| CN106505626B (en) | 2016-12-21 | 2019-04-09 | 阳光电源股份有限公司 | A kind of photovoltaic inverting system and its PID effect compensation method and device |
| CN107659134B (en) * | 2017-07-03 | 2019-06-11 | 哈尔滨工大特种机器人有限公司 | A kind of electric power controller and its control method of light-duty mechanical arm |
| CN113687128B (en) * | 2021-09-08 | 2024-05-14 | 阳光电源股份有限公司 | Current detection method, device and equipment of photovoltaic PID (proportion integration differentiation) suppression circuit |
| CN115453195B (en) * | 2022-08-11 | 2024-09-03 | 云尖信息技术有限公司 | Insulation impedance detection method and detection circuit of photovoltaic inverter system |
| CN116131240B (en) * | 2023-04-20 | 2023-06-23 | 深圳市德兰明海新能源股份有限公司 | Photovoltaic weak current eliminating circuit and energy storage power supply |
| CN116207789B (en) * | 2023-05-06 | 2023-07-21 | 锦浪科技股份有限公司 | PID effect suppression method based on zero sequence |
| CN116722815B (en) * | 2023-08-08 | 2023-12-05 | 锦浪科技股份有限公司 | PID effect suppression system, control method thereof and photovoltaic system |
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| CN203218893U (en) * | 2013-04-24 | 2013-09-25 | 阳光电源（上海）有限公司 | Device for solving potential induction attenuation |
| CN103475208A (en) * | 2013-09-18 | 2013-12-25 | 江苏兆伏新能源有限公司 | PID suppression circuit of photovoltaic system |
| CN103944502A (en) * | 2014-05-09 | 2014-07-23 | 阳光电源股份有限公司 | Anti-potential potential induction decay photovoltaic power generation system, photovoltaic module and inverter |
| CN204179679U (en) * | 2014-11-07 | 2015-02-25 | 深圳市永联科技有限公司 | A kind of photovoltaic module PID effect suppresses system |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203218893U (en) * | 2013-04-24 | 2013-09-25 | 阳光电源（上海）有限公司 | Device for solving potential induction attenuation |
| CN103475208A (en) * | 2013-09-18 | 2013-12-25 | 江苏兆伏新能源有限公司 | PID suppression circuit of photovoltaic system |
| CN103944502A (en) * | 2014-05-09 | 2014-07-23 | 阳光电源股份有限公司 | Anti-potential potential induction decay photovoltaic power generation system, photovoltaic module and inverter |
| CN204179679U (en) * | 2014-11-07 | 2015-02-25 | 深圳市永联科技有限公司 | A kind of photovoltaic module PID effect suppresses system |
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