CN109510188A - The anti-power transmission control method of distributed photovoltaic power generation - Google Patents
The anti-power transmission control method of distributed photovoltaic power generation Download PDFInfo
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- CN109510188A CN109510188A CN201811519717.1A CN201811519717A CN109510188A CN 109510188 A CN109510188 A CN 109510188A CN 201811519717 A CN201811519717 A CN 201811519717A CN 109510188 A CN109510188 A CN 109510188A
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- power generation
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 39
- 238000010248 power generation Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000004146 energy storage Methods 0.000 claims abstract description 19
- 239000004065 semiconductor Substances 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 239000003990 capacitor Substances 0.000 claims description 34
- 230000005611 electricity Effects 0.000 claims description 18
- 230000001939 inductive effect Effects 0.000 claims description 18
- 230000001131 transforming effect Effects 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000011065 in-situ storage Methods 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 238000000819 phase cycle Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
-
- 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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- Supply And Distribution Of Alternating Current (AREA)
- Inverter Devices (AREA)
Abstract
The present invention relates to the anti-power transmission control methods of distributed photovoltaic power generation, it includes control device, energy storage device, photovoltaic phase modulation apparatus, photovoltaic Load adjustment, conventional phase modulation apparatus and general adjustment load, the control device includes preceding filter circuit, inverter circuit, voltage regulator circuit, post filtering circuit, wherein inverter circuit is neutral-point-clamped formula inverter circuit, detect that three-phase is unbalanced counter to send phenomenon by detection device, in the circuitry phase excessively high by energy storage device stored voltage, to achieve the effect that equilibrium；It is wherein additionally provided with voltage regulator circuit, is controlled using metal-oxide-semiconductor, the process constantly charged and discharged is recycled, to form a kind of stable voltage, so that the voltage for exporting or inputting is had stable value, improves the security performance of power grid, stabilized the output voltage；To improve the stability of photovoltaic power generation；The present invention has the advantages that easy to control, good balance effect, stability are high.
Description
Technical field
The present invention relates to technical field of photovoltaic power generation, and in particular to a kind of anti-power transmission control method of distributed photovoltaic power generation.
Background technique
In recent years, with the continuous promotion of photovoltaic module generating efficiency, the advantage of photovoltaic power generation is also gradually highlighted, warp
The development of many years is crossed, photovoltaic power generation has achieved certain achievement.A small amount of distributed generation unit is little to electric network influencing, and works as
When distributed generation unit reaches certain limit, it will grid operation quality, stability, safety is caused to be affected.
The wherein unbalanced anti-power transmission phenomenon of distributed photovoltaic three-phase, it is obvious to electric network influencing, it is unfavorable for the warp of power grid
Ji operation, due to photovoltaic power generation at noon direct sunlight when the electric energy that generates it is more, can occur to send phenomenon, i.e. photovoltaic is sent out
Electricity generate electric energy can transmit electricity to power plant, and at night sunlight deficiency when will not produce electricl energy, it may appear that the phenomenon that supply falls short of demand.
How to allow distributed photovoltaic unit institute generated energy in-situ balancing as far as possible, lacks effective control means at present, predominantly stay in monitoring
Operation phase；Therefore it provides the anti-power transmission control of distributed photovoltaic power generation that a kind of easy to control, good balance effect, stability are high
Method is necessary.
Summary of the invention
The purpose of the invention is to overcome the deficiencies in the prior art, and provide a kind of easy to control, good balance effect, steady
The qualitative anti-power transmission control method of high distributed photovoltaic power generation.
The object of the present invention is achieved like this: the anti-power transmission control method of distributed photovoltaic power generation, it include control device,
Energy storage device, photovoltaic phase modulation apparatus, photovoltaic Load adjustment, conventional phase modulation apparatus and general adjustment load, the control device packet
Preceding filter circuit, inverter circuit, voltage regulator circuit, post filtering circuit are included, the post filtering circuit includes capacitor C9, the capacitor C9
One end connects circuit breaker Q F1, capacitor C8, inductance L4 and inductance L5, the inductance L4 other end and the inductance L5 other end, capacitor C7
It being connected with capacitor C6, capacitor C6, C7, C8, C9 other end ground connection, the circuit breaker Q F1 other end connects contactless contactor KM2,
The contactless contactor KM2 other end connects energy storage device output end.
Voltage regulator circuit includes metal-oxide-semiconductor VT8, the output end of the drain electrode connection post filtering circuit of the metal-oxide-semiconductor VT8, metal-oxide-semiconductor
The base stage of source electrode connection the resistance R2 and triode VT7 of VT8, the collector and diode D7 of the grid connection VT7 of VT8 are described
The emitter connection R2 other end, resistance controller RW and the capacitor C4 of VT7, capacitor C4 other end connection resistance R1 and capacitor C5,
The resistance R1 other end connection RW other end, the capacitor C5 other end and the D7 other end, the both ends the capacitor C4 are also connected with inverse
The input terminal on power transformation road.
Preceding filter circuit includes A, B, C three-phase circuit, and A, B, C three-phase is separately connected fuse RUa, RUb, RUc mono-
End, fuse FUa, FUb, FUc other end connect Inductive component L1, and the Inductive component L1 other end and contactor are normally opened
Contact KM1 is connected with capacitance group C1, and the contactor normally opened contact KM1 other end connects Inductive component L2, the Inductive component
The L2 other end is connect with inverter circuit, and the capacitance group C1 other end connects Inductive component L3, the Inductive component L3 other end
It is connect with the pole N.
Inverter circuit is neutral-point-clamped formula inverter circuit.
The following steps are included:
Step 1), the outlet of monitoring distribution transforming in real time A, B, C three-phase electricity, voltage and terminal voltage operation conditions；
There is the unbalanced anti-power transmission situation of three-phase in step 2, such as discovery distribution transforming, and starting control device starts to adjust；
Step 3), control system first determine whether anti-power transmission phase distributed photovoltaic power generation cell arrangement installation point phase sequence and voltage:
UDetection>UThe upper limit, nearest other phase traditional regulation loads are switched to the phase by conventional phase modulation apparatus；
ULower limit<UDetection<UThe upper limit, photovoltaic phase modulation apparatus unit is switched to other phases；
UDetection<ULower limit, do not adjust；
After step 4), the adjustment of end commutation equipment, again, such as there is anti-power transmission in the anti-power transmission situation of monitoring port, start electricity tune
Regulating device realizes electricity in-situ balancing at distribution transforming port；
After step 5), the starting of electricity regulating device, the anti-power transmission situation in distribution transforming port is monitored again；Such as there is anti-power transmission, starting storage
Energy device, is stored into anti-power transmission amount in energy storage device；
Anti- power transmission is not present in step 6), such as system, is generated electricity by way of merging two or more grid systems definite value according to set energy storage device, starts energy storage device handle
Battery storage electricity supplies power grid according to set target.
The invention has the benefit that
1. the operation of power grid terminal voltage is best；
2. photovoltaic module institute's generated energy balances nearby in access point；
3. distribution transforming exports, the anti-power transmission electricity of photovoltaic preferentially passes through electricity regulating device and adjusts to other phases, is matching extra electricity
Become outlet side and realizes in-situ balancing；
4. distribution transforming exports anti-power transmission amount after adjusting, if any residue, starts energy storage device and energy storage storage is carried out to anti-power transmission amount；
5. such as there are also residues for anti-power transmission amount after energy storage is handled, a certain proportion of reactive power, anti-power transmission after three-phase is balanced are configured
Net；
6. battery storage electricity supplies load in not anti-power transmission；The present invention have a kind of easy to control, good balance effect,
The high advantage of stability.
Detailed description of the invention
Fig. 1 is the anti-each schematic diagram of circuit connection structure of power transmission control method of distributed photovoltaic power generation of the present invention.
Fig. 2 is the anti-power transmission control method control system attachment structure schematic diagram of distributed photovoltaic power generation of the present invention.
Fig. 3 is the anti-power transmission control method connection block diagram of distributed photovoltaic power generation of the present invention.
Specific embodiment
Following further describes the present invention with reference to the drawings.
As shown in Figure 1-3, the anti-power transmission control method of distributed photovoltaic power generation, it includes preceding control device, energy storage device, light
Lie prostrate phase modulation apparatus, photovoltaic Load adjustment, conventional phase modulation apparatus and general adjustment load, the control device include filter circuit,
Inverter circuit, voltage regulator circuit, post filtering circuit, the post filtering circuit include capacitor C9, the connection open circuit of the one end the capacitor C9
Device QF1, capacitor C8, inductance L4 and inductance L5, the inductance L4 other end and the inductance L5 other end, capacitor C7 and capacitor C6 connect
It connects, capacitor C6, C7, C8, C9 other end ground connection, the circuit breaker Q F1 other end connects contactless contactor KM2, contactless contactor
The KM2 other end connects energy storage device output end；Wherein this filter circuit is used to receive the DC current of energy storage device output, works as control
System detection processed is to when needing to start energy storage device, control system is that contactor coil obtains electric, closure KM2 switch, to make to store up
For the DC current of energy device to filter circuit, the current amplitude and peak value generated due to photovoltaic power generation is larger, passes through setting
Two inductance and four capacitance groups π type filter circuit in pairs, effect are more preferable.
Voltage regulator circuit includes metal-oxide-semiconductor VT8, the output end of the drain electrode connection post filtering circuit of the metal-oxide-semiconductor VT8, metal-oxide-semiconductor
The base stage of source electrode connection the resistance R2 and triode VT7 of VT8, the collector and diode D7 of the grid connection VT7 of VT8 are described
The emitter connection R2 other end, resistance controller RW and the capacitor C4 of VT7, capacitor C4 other end connection resistance R1 and capacitor C5,
The resistance R1 other end connection RW other end, the capacitor C5 other end and the D7 other end, the both ends the capacitor C4 are also connected with inverse
The input terminal on power transformation road；By the current direction stable-pressure device of post filtering circuit, and since next step will carry out inversion,
The unstable alternating current amplitude that may make inversion of voltage generates biggish variation.DC current is through metal-oxide-semiconductor, external electrical first
It is charged to inductance and reaches required voltage rating in source.When the voltage for loading both ends increases, made by the switch of metal-oxide-semiconductor
With, external power supply for electrically disconnected, inductance releases the energy being filled with just now, and inductance at this moment has reformed into " power supply ", continues pair
Load supplying.With the continuous consumption of storage energy on inductance, the voltage for loading both ends starts to gradually decrease again, and external power supply is logical
The on-off action for crossing metal-oxide-semiconductor charges again.The process constantly charged and discharged is recycled in this way, to form a kind of stabilization
Voltage, make forever load both ends voltage will not increase and will not reduce.
Preceding filter circuit includes A, B, C three-phase circuit, and A, B, C three-phase is separately connected fuse RUa, RUb, RUc mono-
End, fuse FUa, FUb, FUc other end connect Inductive component L1, and the Inductive component L1 other end and contactor are normally opened
Contact KM1 is connected with capacitance group C1, and the contactor normally opened contact KM1 other end connects Inductive component L2, the Inductive component
The L2 other end is connect with inverter circuit, and the capacitance group C1 other end connects Inductive component L3, the Inductive component L3 other end
It is connect with the pole N, every phase is all correspondingly arranged on LC filter circuit.
Inverter circuit uses existing neutral-point-clamped formula inverter circuit, and DC filter capacitor is connected in series by C2 and C3, and
And each cliff is made of two double power switch of stopping, on A phase bridge arm, VT1a and VD1a are master power switch, VT1 and VD1
Supplemented by power switch, VT1a and VT1 are wholly-controled device；The present invention has a kind of performance easy to use, safe high, easy to operate
The advantages of.
Claims (5)
1. the anti-power transmission control method of distributed photovoltaic power generation, it includes control device, energy storage device, photovoltaic phase modulation apparatus, photovoltaic
Load adjustment, conventional phase modulation apparatus and general adjustment load, it is characterised in that: the control device includes preceding filter circuit, inverse
Power transformation road, voltage regulator circuit, post filtering circuit, the post filtering circuit include capacitor C9, and the one end the capacitor C9 connects breaker
QF1, capacitor C8, inductance L4 and inductance L5, the inductance L4 other end are connect with the inductance L5 other end, capacitor C7 and capacitor C6,
Capacitor C6, C7, C8, C9 other end ground connection, the circuit breaker Q F1 other end connect contactless contactor KM2, contactless contactor KM2
The other end connects energy storage device output end.
2. the anti-power transmission control method of distributed photovoltaic power generation as described in claim 1, it is characterised in that: the voltage regulator circuit packet
Metal-oxide-semiconductor VT8, the output end of the drain electrode connection post filtering circuit of the metal-oxide-semiconductor VT8 are included, the source electrode of metal-oxide-semiconductor VT8 connects resistance R2
With the base stage of triode VT7, the collector of the grid connection VT7 of VT8 and the emitter connection R2 of diode D7, the VT7 are another
One end, resistance controller RW and capacitor C4, the capacitor C4 other end connect resistance R1 and capacitor C5, the resistance R1 other end connection
The RW other end, the capacitor C5 other end and the D7 other end, the both ends the capacitor C4 are also connected with the input terminal of inverter circuit.
3. the anti-power transmission control method of distributed photovoltaic power generation as described in claim 1, it is characterised in that: the preceding filter circuit
Including A, B, C three-phase circuit, A, B, C three-phase is separately connected the one end fuse RUa, RUb, RUc, the fuse FUa,
FUb, FUc other end connect Inductive component L1, the Inductive component L1 other end and contactor normally opened contact KM1 and capacitance group C1
Connection, the contactor normally opened contact KM1 other end connect Inductive component L2, the Inductive component L2 other end and inverter circuit
Connection, the capacitance group C1 other end connect Inductive component L3, and the Inductive component L3 other end is connect with the pole N.
4. the anti-power transmission control method of distributed photovoltaic power generation as described in claim 1, it is characterised in that: the inverter circuit is
Neutral-point-clamped formula inverter circuit.
5. the anti-power transmission control method of distributed photovoltaic power generation as described in claim 1, it is characterised in that: it includes following step
It is rapid:
Step 1), the outlet of monitoring distribution transforming in real time A, B, C three-phase electricity, voltage and terminal voltage operation conditions；
There is the unbalanced anti-power transmission situation of three-phase in step 2, such as discovery distribution transforming, and starting control device starts to adjust；
Step 3), control system first determine whether anti-power transmission phase distributed photovoltaic power generation cell arrangement installation point phase sequence and voltage:
UDetection>UThe upper limit, nearest other phase traditional regulation loads are switched to the phase by conventional phase modulation apparatus；
ULower limit<UDetection<UThe upper limit, photovoltaic phase modulation apparatus unit is switched to other phases；
UDetection<ULower limit, do not adjust；
After step 4), the adjustment of end commutation equipment, again, such as there is anti-power transmission in the anti-power transmission situation of monitoring port, start electricity tune
Regulating device realizes electricity in-situ balancing at distribution transforming port；
After step 5), the starting of electricity regulating device, the anti-power transmission situation in distribution transforming port is monitored again；Such as there is anti-power transmission, starting storage
Energy device, is stored into anti-power transmission amount in energy storage device；
Anti- power transmission is not present in step 6), such as system, is generated electricity by way of merging two or more grid systems definite value according to set energy storage device, starts energy storage device handle
Battery storage electricity supplies power grid according to set target.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811519717.1A CN109510188B (en) | 2018-12-12 | 2018-12-12 | Control method of distributed photovoltaic power generation reverse power transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811519717.1A CN109510188B (en) | 2018-12-12 | 2018-12-12 | Control method of distributed photovoltaic power generation reverse power transmission device |
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| CN109510188A true CN109510188A (en) | 2019-03-22 |
| CN109510188B CN109510188B (en) | 2022-10-21 |
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| CN201811519717.1A Active CN109510188B (en) | 2018-12-12 | 2018-12-12 | Control method of distributed photovoltaic power generation reverse power transmission device |
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Cited By (1)
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| CN109510188B (en) | 2022-10-21 |
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