CN110011329A - Low-voltage power distribution station area powerless control method containing distributed photovoltaic - Google Patents
Low-voltage power distribution station area powerless control method containing distributed photovoltaic Download PDFInfo
- Publication number
- CN110011329A CN110011329A CN201811431300.XA CN201811431300A CN110011329A CN 110011329 A CN110011329 A CN 110011329A CN 201811431300 A CN201811431300 A CN 201811431300A CN 110011329 A CN110011329 A CN 110011329A
- Authority
- CN
- China
- Prior art keywords
- voltage
- area
- photovoltaic
- power
- idle
- 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.)
- Granted
Links
- 238000009826 distribution Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000003990 capacitor Substances 0.000 claims abstract description 60
- 238000011217 control strategy Methods 0.000 claims abstract description 25
- 238000005192 partition Methods 0.000 claims abstract description 6
- 230000009467 reduction Effects 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 6
- 230000001939 inductive effect Effects 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 238000012797 qualification Methods 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 8
- 238000004590 computer program Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 6
- 238000007726 management method Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
-
- H02J3/383—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/50—Controlling the sharing of the out-of-phase component
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses the low-voltage power distribution station area powerless control methods containing distributed photovoltaic, deployment is distributed formula photo-voltaic power supply, photovoltaic DC-to-AC converter and capacitor in low-voltage power distribution station area, the powerless control method includes following procedure: S1, according to platform area voltage, power factor range, idle control interval is divided；S2, acquire low-pressure side voltage and power factor in low-voltage power distribution station area, according to voltage and the affiliated range of power factor, it determines and works as the idle control interval in foreground partition, the idle output that photovoltaic DC-to-AC converter and capacitor are adjusted according to the corresponding control strategy of idle control interval, realizes low-voltage power distribution station area Reactive-power control.The present invention divides the traffic coverage in platform area according to platform area voltage and power factor situation, and guarantees the rational management of platform area voltage and power factor to equipment real-time controls such as platform area inner capacitor, SVG, photovoltaic DC-to-AC converters according to control strategy.
Description
Technical field
The present invention relates to a kind of intelligent low-pressure power distribution station systems, and in particular to a kind of low-voltage distribution containing distributed photovoltaic
Platform area powerless control method, belongs to distribution technique field.
Background technique
With new countryside construction, high-power electric appliance equipment is widely used within the scope of rural area, the big load in rural area, non-linear negative
Lotus cluster increases, and has aggravated burden again for the original idle insufficient power distribution network of configuration.Therefore, reinforce low-voltage distribution network reactive compensation
It distributes rationally, keeps reactive balance, for guaranteeing that power quality, reduction grid loss plays an important role and meaning.New one
The construction of phase power distribution station, is configured with the equipment such as low-voltage intelligent capacitor and SVG in comprehensive distribution box, realizes the idle of the side Tai Qu
Compensation function.
While realizing that distributed photovoltaic fully dissolves, power distribution network and user side operation voltage level and function can be improved
Rate factor is horizontal, realizes the win-win of the multi-party interests such as power grid, user and photovoltaic operator.Power distribution network scheduling is improved to extensive point
The management and running efficiency of cloth power supply is realized considerable, adjustable." distributed generation resource accesses distribution network technology regulation " NB/T
32015-2013 is suitable for accessing the newly-built of power grid, reconstruction and enlarging distributed generation resource by 35kV and following voltage class.Mark
The 5th chapter 5.2.2 of standard is provided: should be in -0.95~0.95 range by the grid-connected distributed electrical active power factor of 380V voltage class
It is interior adjustable.
Currently, power distribution automation main station does not access low pressure distributed photovoltaic, photovoltaic can not be controlled.On the other hand,
Low pressure distributed photovoltaic point is more, wide, and access main station system can not individually be regulated and controled.The present invention is pair with low-voltage distribution transformer platform district
As realizing the unified center intelligence distribution transformer terminals management by power distribution station of the equipment such as photovoltaic, reactive compensation in platform area distributed
Photovoltaic reduces the configuration of platform area reactive-load compensation equipment to the reactive power support of power distribution station, promotes economic benefit.
Summary of the invention
It is an object of the invention to overcome deficiency in the prior art, the low-voltage power distribution station area containing distributed photovoltaic is provided
Powerless control method, to equipment real-time controls such as platform area inner capacitor, SVG, photovoltaic DC-to-AC converters, guarantee platform area voltage and power because
Several rational managements.
In order to solve the above technical problems, the present invention provides the idle controlling parties of low-voltage power distribution station area containing distributed photovoltaic
Method, the interior deployment of low-voltage power distribution station area are distributed formula photo-voltaic power supply, photovoltaic DC-to-AC converter and capacitor, characterized in that the no power control
Method processed includes following procedure:
S1 divides idle control interval according to platform area voltage, power factor range；
S2 acquires low-pressure side voltage and power factor in low-voltage power distribution station area, according to voltage and the affiliated range of power factor,
It determines and works as the idle control interval in foreground partition, photovoltaic DC-to-AC converter and capacitor are adjusted according to the corresponding control strategy of idle control interval
Idle output, realize low-voltage power distribution station area Reactive-power control.
Further, dividing idle control interval is 7 sections, is respectively as follows:
1 section is out-of-limit area on voltage: voltage is greater than 1.1Un；
2 sections are security area on voltage: voltage is greater than 1.07Un, is less than 1.1Un；
3 sections are that power factor bears out-of-limit area: voltage is greater than 0.93Un, is less than 1.07Un；Power factor is negative, be less than-
PFIt is qualified；
4 sections are the just out-of-limit area of power factor: voltage is greater than 0.93Un, is less than 1.07Un；Power factor is positive, and is less than
PFIt is qualified；
5 sections are security area under voltage: voltage is greater than 0.9Un, is less than 0.93Un；
6 sections are out-of-limit area under voltage: voltage is less than 0.9Un；
7 sections are voltage power factor qualification area: voltage is more than or equal to 0.93Un, is less than or equal to 1.07Un；Power factor
More than or equal to-PFIt is qualified, it is less than or equal to PFIt is qualified；
Wherein, UnFor platform area voltage rating, PFIt is qualifiedFor qualified power factor definite value.
Further, on 1 section voltage out-of-limit area control strategy: adjusting direction is from 1st area -> 2nd area；Specific adjusting side
Case are as follows: exit and put into capacitor, be -0.95 by the way that photovoltaic DC-to-AC converter mode is arranged to adjust distributed photovoltaic output power factor
It absorbs idle.
Further, on 2 section voltages security area control strategy: adjusting direction is from 2nd area -> 7th area；
Specific regulation scheme are as follows:
Based on current voltage and this section lower voltage limit, the electricity of calculating power distribution station current voltage to this interval limit voltage
Deviation delta U is pressed, according to Q-U droop characteristic, current voltage is calculated and is restored to voltage rating (Un) idle exit capacity Δ
Q；
Preferential reduction distributed photovoltaic output is idle: remembering the active and reactive respectively P of current distributed photovoltaic outputpv1、
Qpv1,
Calculating photovoltaic adjustable capacity is
If photovoltaic adjustable capacity is greater than Δ Q, it is Q that control photovoltaic output is idlepv1Δ Q, therefore issue photovoltaic DC-to-AC converter
Power factor definite value is
If photovoltaic adjustable capacity is less than Δ Q, first exits and put into capacitor Qc1, then reduce photovoltaic reactive capability Δ Q-
Qc1。
Further, 3 section power factors bear the control strategy in out-of-limit area: adjusting direction is from 3rd area -> 7th area；
Specific regulation scheme are as follows:
Based on platform area current active power, reactive power and qualified power factor definite value, idle overfill capacity is calculatedWherein P1、Q1For platform Qu total real-time active power, reactive power, PFIt is qualifiedTo close
Lattice power factor definite value；
Preferential reduction distributed photovoltaic output is idle: remembering the active and reactive respectively P of current distributed photovoltaic outputpv1、
Qpv1,
Calculating photovoltaic adjustable capacity is
If photovoltaic adjustable capacity is greater than Δ Q, it is Q that control photovoltaic output is idlepv1Δ Q, therefore issue photovoltaic DC-to-AC converter
Power factor definite value is
If photovoltaic adjustable capacity is less than Δ Q, first exits and put into capacitor Qc1, then reduce photovoltaic reactive capability Δ Q-
Qc1。
Further, the control strategy in the just out-of-limit area of 4 section power factors: adjusting direction is from 4th area -> 7th area；
Specific regulation scheme are as follows:
Based on platform area current active power, reactive power and qualified power factor definite value, no-power vacancy is calculatedWherein P1、Q1For platform Qu total real-time active power, reactive power, PFIt is qualifiedFor
Qualified power factor definite value；
When platform area capacitor, SVG, distributed photovoltaic residue reactive capability meet no-power vacancy, it is idle to issue each equipment
Target value, and finally realize that power factor is restored to PFIt is qualified, detailed process are as follows:
The preferential distributed photovoltaic that increases exports idle, the current active and reactive respectively P of distributed photovoltaic outputpv1、Qpv1,
Calculating photovoltaic adjustable capacity isIf photovoltaic adjustable capacity is greater than Δ Q, photovoltaic is controlled
It exports idle for Qpv1+ Δ Q, therefore issue photovoltaic DC-to-AC converter power factor definite value and be
When distributed photovoltaic adjustable capacity is less than Δ Q, investment capacitor；
When distributed photovoltaic, capacitor residue reactive capability are unsatisfactory for no-power vacancy, the maximum idle output in platform area is carried out
Control puts into whole capacitors, is 0.95 hair by the way that photovoltaic DC-to-AC converter mode is arranged to adjust distributed photovoltaic output power factor
It is idle out.
Further, under 5 section voltages security area control strategy: adjusting direction is from 5th area -> 7th area；
Specific regulation scheme are as follows:
Deviation delta U based on platform area current voltage Yu voltage rating Un, according to Q-U droop characteristic (Δ Q=k* Δ
U), the no-power vacancy Δ Q that current voltage is restored to Un is calculated；
When the remaining reactive capability of platform area capacitor, SVG, distributed photovoltaic meets no-power vacancy, intelligent distribution transformer terminals
Distributed photovoltaic, capacitor Target of Reactive Power value are issued, and finally realizes that voltage restores to Un；
The preferential distributed photovoltaic that increases exports idle, the current active and reactive respectively P of distributed photovoltaic outputpv1、Qpv1,
Calculating photovoltaic adjustable capacity isIf photovoltaic adjustable capacity is greater than Δ Q, photovoltaic is controlled
It exports idle for Qpv1+ Δ Q, therefore issue photovoltaic DC-to-AC converter power factor definite value and be
When distributed photovoltaic adjustable capacity is less than Δ Q, investment capacitor；
When distributed photovoltaic, capacitor residue reactive capability are unsatisfactory for no-power vacancy, the maximum idle output in platform area is carried out
Control puts into whole capacitors, is 0.95 hair by the way that photovoltaic DC-to-AC converter mode is arranged to adjust distributed photovoltaic output power factor
It is idle out；
When reactive capability is unsatisfactory for no-power vacancy, voltage so far section upper voltage limit (0.93Un) is lowered, is recalculated
No-power vacancy Δ Q, and carry out the idle control of distributed photovoltaic, capacitor.
Further, out-of-limit area's control under 6 voltages: adjusting direction is from 6th area -> 5th area；
Specific regulation scheme are as follows: put into whole capacitors, distributed photovoltaic output work is adjusted by setting photovoltaic DC-to-AC converter
Rate factor is that 0.95 sending is idle.
Further, between the area Q-U droop characteristic Ji Tai idle work variable quantity Δ Q and platform area voltage variety Δ U
Relation formula, specific formula are expressed as Δ Q=k* Δ U, wherein k is coefficient.
Further, k value, calculation formula are estimated with the ratio of maximum Reactive-power control capacity and voltage regulation limits
Are as follows:
Wherein, QC is totalAlways can provide capacitive reactive power capacity for platform Qu, including condenser capacity, photovoltaic capacitive reactive power capacity,
The capacitive reactive power capacity of SVG, Ppv1For the real-time active power of distributed photovoltaic, For distributed photovoltaic
The reactive capability of maximum inductive, 0.95 is to require photovoltaic system that should have in grid-connected standard, QSVGLFor SVG maximum inductive
Reactive capability, UnFor platform area voltage rating, 1.1Un-0.9UnIt is preset voltage regulation limits.
Compared with prior art, the beneficial effects obtained by the present invention are as follows being: the present invention is according to platform area voltage and power factor
Situation divides the traffic coverage in platform area, and according to control strategy, to the equipment such as platform area inner capacitor, SVG, photovoltaic DC-to-AC converter reality
When control, guarantee the rational management of platform area voltage and power factor.
Detailed description of the invention
Fig. 1 is low-voltage power distribution station area powerless control system architecture diagram；
Fig. 2 is that the idle control interval in low-voltage platform area divides.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
A kind of low-voltage power distribution station area powerless control method containing distributed photovoltaic of the invention, the interior deployment of low-voltage power distribution station area
It is distributed formula photo-voltaic power supply, photovoltaic DC-to-AC converter and capacitor, the powerless control method includes following procedure:
S1 divides idle control interval according to platform area voltage, power factor range；
S2 acquires low-pressure side voltage and power factor in low-voltage power distribution station area, according to voltage and the affiliated range of power factor,
It determines and works as the idle control interval in foreground partition, photovoltaic DC-to-AC converter and capacitor are adjusted according to the corresponding control strategy of idle control interval
Idle output, realize low-voltage power distribution station area Reactive-power control.
The present invention divides the traffic coverage in platform area according to platform area voltage and power factor situation, and according to control strategy, right
The equipment real-time controls such as platform area inner capacitor, SVG, photovoltaic DC-to-AC converter guarantee the rational management of platform area voltage and power factor.
Embodiment
It include portion in system as shown in Figure 1, being the low-voltage power distribution station area powerless control system schematic diagram containing distributed photovoltaic
Distributed photovoltaic power, photovoltaic DC-to-AC converter, SVG, the capacitor, intelligent distribution transformer terminals equipment being deployed in low-voltage power distribution station area.This
Capacitor described in invention is the intelligent capacitor for having communication function, and SVG is used to carry out reactive compensation, and photovoltaic DC-to-AC converter is used
To carry out power factor controlling.SVG, capacitor access intelligent distribution transformer terminals, light in distributed generation resource using RS485 communication interface
It lies prostrate inverter and intelligent distribution transformer terminals is accessed using broadband power line carrier.Intelligent distribution transformer terminals are the control centre of system, in real time
The information such as picking platform area low-pressure side voltage, electric current, active power, reactive power are drawn according to platform area voltage and power factor situation
The traffic coverage in the area Fen Tai, and according to the control strategy in each section, it is real-time to platform area inner capacitor, SVG, photovoltaic DC-to-AC converter equipment
Control guarantees the rational management of platform area voltage and power factor.
Low-voltage power distribution station area voltage powerless control method containing distributed photovoltaic of the invention, the specific steps are as follows:
Step 1 calculates the Q-U droop characteristic in platform area.
Intelligent distribution transformer terminals calculate the Q-U droop characteristic in platform area according to platform area topological structure.Q-U in platform area
Relation formula between the area droop characteristic Ji Tai idle work variable quantity Δ Q and platform area voltage variety Δ U.Specific formula expression
For Δ Q=k* Δ U, wherein k is coefficient.
K value is estimated with the ratio of maximum Reactive-power control capacity and voltage regulation limits in the present invention, its calculation formula is:
Wherein, QC is totalAlways can provide capacitive reactive power capacity for platform Qu, including condenser capacity, photovoltaic capacitive reactive power capacity,
The capacitive reactive power capacity of SVG, Ppv1For the real-time active power of distributed photovoltaic, For distributed photovoltaic
The reactive capability of maximum inductive, 0.95 is to require photovoltaic system that should have in grid-connected standard, QSVGLFor SVG maximum inductive
Reactive capability, UnFor platform area voltage rating, 1.1Un-0.9UnIt is preset voltage regulation limits.
Because SVG is automatic adjustment, terminal control is not needed, so being not involved with SVG tune in Reactive-power control scheme
Section, but due to SVG existing in actual electric network route, in view of the capacity of SVG when terminal control, certainly, if
There is no this equipment in power network line, the reactive capability in relation to SVG can also be deleted.
Step 2 divides idle control interval according to platform area voltage, power factor range.
As shown in Fig. 2, platform area operating condition is divided into 7 idle controls according to platform area voltage, the range of power factor
Section is respectively as follows:
1 section is out-of-limit area on voltage: voltage is greater than 1.1Un；
2 sections are security area on voltage: voltage is greater than 1.07Un, is less than 1.1Un；
3 sections are that power factor bears out-of-limit area: voltage is greater than 0.93Un, is less than 1.07Un；Power factor is negative, be less than-
PFIt is qualified；
4 sections are the just out-of-limit area of power factor: voltage is greater than 0.93Un, is less than 1.07Un；Power factor is positive, and is less than
PFIt is qualified；
5 sections are security area under voltage: voltage is greater than 0.9Un, is less than 0.93Un；
6 sections are out-of-limit area under voltage: voltage is less than 0.9Un；
7 sections are voltage power factor qualification area: voltage is more than or equal to 0.93Un, is less than or equal to 1.07Un；Power factor
More than or equal to-PFIt is qualified, it is less than or equal to PFIt is qualified。
Wherein, UnFor platform area voltage rating, PFIt is qualifiedFor qualified power factor definite value.
Step 3: acquisition distribution transformer low-pressure side voltage and power factor, according to the numerical value of voltage and power factor, really
The settled idle control interval in foreground partition, according to idle in different idle control interval corresponding control strategy regulating platforms area.
Because SVG is automatic adjustment, terminal control is not needed, therefore, in the scheme being described below, without reference to SVG
Reactive-power control.
Each corresponding control strategy of idle control interval are as follows:
The control strategy in out-of-limit area on (1) 1 section voltage: adjusting direction is that will be run from 1st area -> 2nd area when foreground partition
Section is 1 section, and adjusting target is that the area Shi Tai operates in 2 sections.
Specific regulation scheme are as follows: exit and put into capacitor, adjust distributed photovoltaic by the way that photovoltaic DC-to-AC converter mode is arranged
Output power factor is that -0.95 absorption is idle.
The control strategy of security area on (2) 2 section voltages: adjusting direction is from 2nd area -> 7th area.
Specific regulation scheme are as follows:
Based on current voltage and this section lower voltage limit (1.07Un), power distribution station current voltage is calculated to this interval limit
The voltage deviation Δ U of voltage (1.07Un) calculates current voltage and is restored to according to Q-U droop characteristic (Δ Q=k* Δ U)
Voltage rating (Un) idle exit capacity Δ Q.
It obtains in platform area and has put into reactive capability, wherein distributed photovoltaic investment reactive capability is acquired according to real time communication
Idle output obtains, SVG, capacitor the reactive capability of investment by giving intelligent distribution transformer terminals in real time communication.According to platform
Reactive capability is put into area, intelligent distribution transformer terminals exit control using communication control mode progress is idle.Detailed process are as follows:
Preferential reduction distributed photovoltaic output is idle: remembering the active and reactive respectively P of current distributed photovoltaic outputpv1、
Qpv1,
Calculating photovoltaic adjustable capacity is
If photovoltaic adjustable capacity is greater than Δ Q, it is Q that control photovoltaic output is idlepv1Δ Q, therefore issue photovoltaic DC-to-AC converter
Power factor definite value is
If photovoltaic adjustable capacity is less than Δ Q, first exits and put into capacitor Qc1, then reduce photovoltaic reactive capability Δ Q-
Qc1。
(3) 3 section power factors bear the control strategy in out-of-limit area: adjusting direction is from 3rd area -> 7th area.
Specific regulation scheme are as follows:
Based on platform area current active power, reactive power and qualified power factor definite value, idle overfill capacity is calculatedWherein P1、Q1For platform Qu total real-time active power, reactive power, PFIt is qualifiedTo close
Lattice power factor definite value.
According to reactive capability has been put into, progress is idle to exit control, and control method is identical as (2), i.e., described below.
Preferential reduction distributed photovoltaic output is idle: remembering the active and reactive respectively P of current distributed photovoltaic outputpv1、
Qpv1,
Calculating photovoltaic adjustable capacity is
If photovoltaic adjustable capacity is greater than Δ Q, it is Q that control photovoltaic output is idlepv1Δ Q, therefore issue photovoltaic DC-to-AC converter
Power factor definite value is
If photovoltaic adjustable capacity is less than Δ Q, first exits and put into capacitor Qc1, then reduce photovoltaic reactive capability Δ Q-
Qc1。
The control strategy in the just out-of-limit area of (4) 4 section power factors: adjusting direction is from 4th area -> 7th area.
Specific regulation scheme are as follows:
Based on platform area current active power, reactive power and qualified power factor definite value, no-power vacancy is calculatedWherein P1、Q1For platform Qu total real-time active power, reactive power, PFIt is qualifiedTo close
Lattice power factor definite value.
When platform area capacitor, SVG, distributed photovoltaic residue reactive capability meet no-power vacancy, under intelligent distribution transformer terminals
It sends out equipment Target of Reactive Power value each, and finally realizes that power factor is restored to PFIt is qualified, detailed process are as follows:
The preferential distributed photovoltaic that increases exports idle, the current active and reactive respectively P of distributed photovoltaic outputpv1、Qpv1,
Calculating photovoltaic adjustable capacity isIf photovoltaic adjustable capacity is greater than Δ Q, photovoltaic is controlled
It exports idle for Qpv1+ Δ Q, therefore issue photovoltaic DC-to-AC converter power factor definite value and be
When distributed photovoltaic adjustable capacity is less than Δ Q, investment capacitor.
When distributed photovoltaic, capacitor residue reactive capability are unsatisfactory for no-power vacancy, the maximum idle output in platform area is carried out
Control puts into whole capacitors, is 0.95 hair by the way that photovoltaic DC-to-AC converter mode is arranged to adjust distributed photovoltaic output power factor
It is idle out.
The control strategy of security area under (5) 5 section voltages: adjusting direction is from 5th area -> 7th area.
Specific regulation scheme are as follows:
Deviation delta U based on platform area current voltage Yu voltage rating Un, according to Q-U droop characteristic (Δ Q=k* Δ
U), the no-power vacancy Δ Q that current voltage is restored to Un is calculated.
When the remaining reactive capability of platform area capacitor, SVG, distributed photovoltaic meets no-power vacancy, intelligent distribution transformer terminals
Distributed photovoltaic, capacitor Target of Reactive Power value are issued, and finally realizes that voltage restores to Un；
The preferential distributed photovoltaic that increases exports idle, the current active and reactive respectively P of distributed photovoltaic outputpv1、Qpv1,
Calculating photovoltaic adjustable capacity isIf photovoltaic adjustable capacity is greater than Δ Q, photovoltaic is controlled
It exports idle for Qpv1+ Δ Q, therefore issue photovoltaic DC-to-AC converter power factor definite value and be
When distributed photovoltaic adjustable capacity is less than Δ Q, investment capacitor.
When distributed photovoltaic, capacitor residue reactive capability are unsatisfactory for no-power vacancy, the maximum idle output in platform area is carried out
Control puts into whole capacitors, is 0.95 hair by the way that photovoltaic DC-to-AC converter mode is arranged to adjust distributed photovoltaic output power factor
It is idle out.
When reactive capability is unsatisfactory for no-power vacancy, voltage so far section upper voltage limit (0.93Un) is lowered, is recalculated
No-power vacancy Δ Q, and carry out the idle control of distributed photovoltaic, capacitor.
Out-of-limit area's control under (6) 6 voltages: adjusting direction is from 6th area -> 5th area.
Specific regulation scheme are as follows: put into whole capacitors, distributed photovoltaic output work is adjusted by setting photovoltaic DC-to-AC converter
Rate factor is that 0.95 sending is idle.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (9)
1. the low-voltage power distribution station area powerless control method containing distributed photovoltaic, the interior deployment of low-voltage power distribution station area is distributed formula photovoltaic electric
Source, photovoltaic DC-to-AC converter and capacitor, characterized in that the powerless control method includes following procedure:
S1 divides idle control interval according to platform area voltage, power factor range；
S2 acquires low-pressure side voltage and power factor in low-voltage power distribution station area, according to voltage and the affiliated range of power factor, determines
When the idle control interval in foreground partition, the nothing of photovoltaic DC-to-AC converter and capacitor is adjusted according to the corresponding control strategy of idle control interval
Function output, realizes low-voltage power distribution station area Reactive-power control.
2. the low-voltage power distribution station area powerless control method according to claim 1 containing distributed photovoltaic, characterized in that divide
Idle control interval is 7 sections, is respectively as follows:
1 section is out-of-limit area on voltage: voltage is greater than 1.1Un；
2 sections are security area on voltage: voltage is greater than 1.07Un, is less than 1.1Un；
3 sections are that power factor bears out-of-limit area: voltage is greater than 0.93Un, is less than 1.07Un；Power factor is negative, and is less than-PFIt is qualified；
4 sections are the just out-of-limit area of power factor: voltage is greater than 0.93Un, is less than 1.07Un；Power factor is positive, and is less than PFIt is qualified；
5 sections are security area under voltage: voltage is greater than 0.9Un, is less than 0.93Un；
6 sections are out-of-limit area under voltage: voltage is less than 0.9Un；
7 sections are voltage power factor qualification area: voltage is more than or equal to 0.93Un, is less than or equal to 1.07Un；Power factor is greater than
Equal to-PFIt is qualified, it is less than or equal to PFIt is qualified；
Wherein, UnFor platform area voltage rating, PFIt is qualifiedFor qualified power factor definite value.
3. the low-voltage power distribution station area powerless control method according to claim 2 containing distributed photovoltaic, characterized in that 1st area
Between on voltage out-of-limit area control strategy: adjusting direction is from 1st area -> 2nd area；Specific regulation scheme are as follows: exit and put into capacitor
Device, adjusting photovoltaic DC-to-AC converter output power factor is that -0.95 absorption is idle.
4. the low-voltage power distribution station area powerless control method according to claim 2 containing distributed photovoltaic, characterized in that 2nd area
Between on voltage security area control strategy: adjusting direction is from 2nd area -> 7th area；
Specific regulation scheme are as follows:
Based on current voltage and this section lower voltage limit, the voltage for calculating power distribution station current voltage to this interval limit voltage is inclined
Poor Δ U, according to Q-U droop characteristic, calculating current voltage is restored to the idle of voltage rating and exits capacity Δ Q；
Preferential reduction distributed photovoltaic output is idle, remembers the active and reactive respectively P of current distributed photovoltaic outputpv1、Qpv1, meter
Calculating photovoltaic adjustable capacity is
If photovoltaic adjustable capacity is greater than Δ Q, it is Q that control photovoltaic output is idlepv1Δ Q, therefore issue photovoltaic DC-to-AC converter power
Factor definite value is
If photovoltaic adjustable capacity is less than Δ Q, first exits and put into capacitor Qc1, then reduce photovoltaic reactive capability Δ Q-Qc1。
5. the low-voltage power distribution station area powerless control method according to claim 2 containing distributed photovoltaic, characterized in that 3rd area
Between power factor bear the control strategy in out-of-limit area: adjusting direction is from 3rd area -> 7th area；
Specific regulation scheme are as follows:
Based on platform area current active power, reactive power and qualified power factor definite value, idle overfill capacity is calculatedWherein P1、Q1For platform Qu total real-time active power, reactive power, PFIt is qualifiedTo close
Lattice power factor definite value；
Preferential reduction distributed photovoltaic output is idle, remembers the active and reactive respectively P of current distributed photovoltaic outputpv1、Qpv1, meter
Calculating photovoltaic adjustable capacity is
If photovoltaic adjustable capacity is greater than Δ Q, it is Q that control photovoltaic output is idlepv1Δ Q, therefore issue photovoltaic DC-to-AC converter power
Factor definite value is
If photovoltaic adjustable capacity is less than Δ Q, first exits and put into capacitor Qc1, then reduce photovoltaic reactive capability Δ Q-Qc1。
6. the low-voltage power distribution station area powerless control method according to claim 2 containing distributed photovoltaic, characterized in that 4th area
Between the just out-of-limit area of power factor control strategy: adjusting direction is from 4th area -> 7th area；
Specific regulation scheme are as follows:
Based on platform area current active power, reactive power and qualified power factor definite value, no-power vacancy is calculatedWherein P1、Q1For platform Qu total real-time active power, reactive power, PFIt is qualifiedTo close
Lattice power factor definite value；
When platform area capacitor, SVG, distributed photovoltaic residue reactive capability meet no-power vacancy, each equipment Target of Reactive Power is issued
Value, and finally realize that power factor is restored to PFIt is qualified, detailed process are as follows:
The preferential distributed photovoltaic that increases exports idle, the current active and reactive respectively P of distributed photovoltaic outputpv1、Qpv1, calculate
Photovoltaic adjustable capacity isIf photovoltaic adjustable capacity is greater than Δ Q, control photovoltaic output
Idle is Qpv1+ Δ Q, therefore issue photovoltaic DC-to-AC converter power factor definite value and beWhen
Distributed photovoltaic adjustable capacity is less than Δ Q, puts into capacitor；
When distributed photovoltaic, capacitor residue reactive capability are unsatisfactory for no-power vacancy, the maximum idle output control in platform area is carried out,
Whole capacitors are put into, adjusting photovoltaic DC-to-AC converter output power factor is that 0.95 sending is idle.
7. the low-voltage power distribution station area powerless control method according to claim 1 containing distributed photovoltaic, characterized in that 5th area
Between under voltage security area control strategy: adjusting direction is from 5th area -> 7th area；
Specific regulation scheme are as follows:
Based on platform area current voltage and voltage rating UnDeviation delta U calculate current voltage and restore according to Q-U droop characteristic
To UnNo-power vacancy Δ Q；
When the remaining reactive capability of platform area capacitor, SVG, distributed photovoltaic meets no-power vacancy, distributed photovoltaic, electricity are issued
Container Target of Reactive Power value, and finally realize that voltage restores to Un；
The preferential distributed photovoltaic that increases exports idle, the current active and reactive respectively P of distributed photovoltaic outputpv1、Qpv1, calculate
Photovoltaic adjustable capacity isIf photovoltaic adjustable capacity is greater than Δ Q, control photovoltaic output
Idle is Qpv1+ Δ Q, therefore issue photovoltaic DC-to-AC converter power factor definite value and beWhen
Distributed photovoltaic adjustable capacity is less than Δ Q, puts into capacitor；
When distributed photovoltaic, capacitor residue reactive capability are unsatisfactory for no-power vacancy, the maximum idle output control in platform area is carried out,
Whole capacitors are put into, adjusting photovoltaic DC-to-AC converter output power factor is that 0.95 sending is idle；
When reactive capability is unsatisfactory for no-power vacancy, voltage so far section upper voltage limit is lowered, no-power vacancy Δ Q is recalculated,
And carry out the idle control of distributed photovoltaic, capacitor.
8. the low-voltage power distribution station area powerless control method according to claim 1 containing distributed photovoltaic, characterized in that 6 electricity
Depress out-of-limit area's control: adjusting direction is from 6th area -> 5th area；
Specific regulation scheme are as follows: put into whole capacitors, setting photovoltaic DC-to-AC converter output power factor is that 0.95 sending is idle.
9. the low-voltage power distribution station area powerless control method according to claim 1 containing distributed photovoltaic, characterized in that Q-U
Relation formula between the area droop characteristic Ji Tai idle work variable quantity Δ Q and platform area voltage variety Δ U, specific formula expression
For Δ Q=k* Δ U, wherein k is coefficient；
K value is estimated with the ratio of maximum Reactive-power control capacity and voltage regulation limits, its calculation formula is:
Wherein, QC is totalIt always can provide capacitive reactive power capacity for platform Qu, the appearance including condenser capacity, photovoltaic capacitive reactive power capacity, SVG
Property reactive capability, Ppv1For the real-time active power of distributed photovoltaic, For distributed photovoltaic maximum sense
The reactive capability of property, 0.95 is to require photovoltaic system that should have in grid-connected standard, QSVGLFor the idle of SVG maximum inductive
Capacity, UnFor platform area voltage rating, 1.1Un-0.9UnIt is preset voltage regulation limits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811431300.XA CN110011329B (en) | 2018-11-26 | 2018-11-26 | Reactive power control method for low-voltage distribution area containing distributed photovoltaic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811431300.XA CN110011329B (en) | 2018-11-26 | 2018-11-26 | Reactive power control method for low-voltage distribution area containing distributed photovoltaic |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110011329A true CN110011329A (en) | 2019-07-12 |
| CN110011329B CN110011329B (en) | 2022-08-16 |
Family
ID=67165046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811431300.XA Active CN110011329B (en) | 2018-11-26 | 2018-11-26 | Reactive power control method for low-voltage distribution area containing distributed photovoltaic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110011329B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110890758A (en) * | 2019-12-19 | 2020-03-17 | 无锡科能达自动化科技有限公司 | Distributed photovoltaic power station power factor control module, method and control system |
| CN112003336A (en) * | 2020-09-02 | 2020-11-27 | 上海振华重工电气有限公司 | Distributed photovoltaic power factor optimization system and method |
| CN112366720A (en) * | 2020-10-30 | 2021-02-12 | 南京因泰莱电器股份有限公司 | Reactive power regulation method for new energy system |
| CN112653178A (en) * | 2019-10-12 | 2021-04-13 | 株洲变流技术国家工程研究中心有限公司 | Distributed photovoltaic power station system and reactive self-balancing control method |
| CN113452027A (en) * | 2021-07-27 | 2021-09-28 | 山东鲁软数字科技有限公司智慧能源分公司 | Energy scheduling system and method for low-voltage flexible direct power distribution transformer area |
| CN113725897A (en) * | 2021-08-12 | 2021-11-30 | 国网山东省电力公司电力科学研究院 | Autonomous voltage control method and operation mode control method for distributed photovoltaic inverter |
| CN114256876A (en) * | 2021-12-21 | 2022-03-29 | 青岛鼎信通讯股份有限公司 | Distributed photovoltaic inverter control strategy applied to low-voltage transformer area |
| CN114336658A (en) * | 2021-12-13 | 2022-04-12 | 国网辽宁省电力有限公司葫芦岛供电公司 | Distribution network reactive power control method containing distributed photovoltaic and reactive power regulation equipment |
| CN115347577A (en) * | 2022-10-13 | 2022-11-15 | 石家庄科林物联网科技有限公司 | Multi-region limit voltage regulation and control method and device based on distributed photovoltaic |
| CN116094177A (en) * | 2023-04-07 | 2023-05-09 | 江苏多端科技有限公司 | Regulation and control system and regulation and control method for power factor of private transformer user side |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105098787A (en) * | 2015-08-17 | 2015-11-25 | 国家电网公司 | Reactive power coordinated control algorithm for distributed photovoltaics of distribution network based on eleven-lattice graph |
| CN105811424A (en) * | 2014-12-29 | 2016-07-27 | 国家电网公司 | Reactive power coordinated control method for distributed photovoltaic inverters and capacitor bank |
| CN106992526A (en) * | 2017-05-18 | 2017-07-28 | 国网山东省电力公司电力科学研究院 | The photovoltaic access distribution network voltage control system and method for a kind of layered distribution type |
| CN107086578A (en) * | 2017-05-22 | 2017-08-22 | 国网浙江省电力公司宁波供电公司 | A kind of region voltage layered distribution type cooperative control system of photovoltaic power distribution network |
| CN107666152A (en) * | 2016-07-28 | 2018-02-06 | 苏州复睿电力科技股份有限公司 | Photovoltaic power station grid entry point voltage and the out-of-limit control method of power factor |
| CN108695892A (en) * | 2018-06-13 | 2018-10-23 | 国网上海市电力公司 | A kind of distribution network voltage control method adjusted based on photovoltaic DC-to-AC converter |
-
2018
- 2018-11-26 CN CN201811431300.XA patent/CN110011329B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811424A (en) * | 2014-12-29 | 2016-07-27 | 国家电网公司 | Reactive power coordinated control method for distributed photovoltaic inverters and capacitor bank |
| CN105098787A (en) * | 2015-08-17 | 2015-11-25 | 国家电网公司 | Reactive power coordinated control algorithm for distributed photovoltaics of distribution network based on eleven-lattice graph |
| CN107666152A (en) * | 2016-07-28 | 2018-02-06 | 苏州复睿电力科技股份有限公司 | Photovoltaic power station grid entry point voltage and the out-of-limit control method of power factor |
| CN106992526A (en) * | 2017-05-18 | 2017-07-28 | 国网山东省电力公司电力科学研究院 | The photovoltaic access distribution network voltage control system and method for a kind of layered distribution type |
| CN107086578A (en) * | 2017-05-22 | 2017-08-22 | 国网浙江省电力公司宁波供电公司 | A kind of region voltage layered distribution type cooperative control system of photovoltaic power distribution network |
| CN108695892A (en) * | 2018-06-13 | 2018-10-23 | 国网上海市电力公司 | A kind of distribution network voltage control method adjusted based on photovoltaic DC-to-AC converter |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112653178A (en) * | 2019-10-12 | 2021-04-13 | 株洲变流技术国家工程研究中心有限公司 | Distributed photovoltaic power station system and reactive self-balancing control method |
| CN110890758B (en) * | 2019-12-19 | 2021-08-20 | 无锡科能达自动化科技有限公司 | Distributed photovoltaic power station power factor control module, method and control system |
| CN110890758A (en) * | 2019-12-19 | 2020-03-17 | 无锡科能达自动化科技有限公司 | Distributed photovoltaic power station power factor control module, method and control system |
| CN112003336B (en) * | 2020-09-02 | 2022-01-04 | 上海振华重工电气有限公司 | Distributed photovoltaic power factor optimization system and method |
| CN112003336A (en) * | 2020-09-02 | 2020-11-27 | 上海振华重工电气有限公司 | Distributed photovoltaic power factor optimization system and method |
| CN112366720A (en) * | 2020-10-30 | 2021-02-12 | 南京因泰莱电器股份有限公司 | Reactive power regulation method for new energy system |
| CN113452027B (en) * | 2021-07-27 | 2023-04-28 | 山东鲁软数字科技有限公司智慧能源分公司 | Energy scheduling system and method for low-voltage flexible direct power distribution station |
| CN113452027A (en) * | 2021-07-27 | 2021-09-28 | 山东鲁软数字科技有限公司智慧能源分公司 | Energy scheduling system and method for low-voltage flexible direct power distribution transformer area |
| CN113725897A (en) * | 2021-08-12 | 2021-11-30 | 国网山东省电力公司电力科学研究院 | Autonomous voltage control method and operation mode control method for distributed photovoltaic inverter |
| CN113725897B (en) * | 2021-08-12 | 2023-07-07 | 国网山东省电力公司电力科学研究院 | Autonomous voltage and operation mode control method for distributed photovoltaic inverter |
| CN114336658A (en) * | 2021-12-13 | 2022-04-12 | 国网辽宁省电力有限公司葫芦岛供电公司 | Distribution network reactive power control method containing distributed photovoltaic and reactive power regulation equipment |
| CN114336658B (en) * | 2021-12-13 | 2023-12-22 | 国网辽宁省电力有限公司葫芦岛供电公司 | Distribution network reactive power control method containing distributed photovoltaic and reactive power regulation equipment |
| CN114256876A (en) * | 2021-12-21 | 2022-03-29 | 青岛鼎信通讯股份有限公司 | Distributed photovoltaic inverter control strategy applied to low-voltage transformer area |
| CN115347577A (en) * | 2022-10-13 | 2022-11-15 | 石家庄科林物联网科技有限公司 | Multi-region limit voltage regulation and control method and device based on distributed photovoltaic |
| CN115347577B (en) * | 2022-10-13 | 2023-01-03 | 石家庄科林物联网科技有限公司 | Multi-region limit voltage regulation and control method and device based on distributed photovoltaic |
| CN116094177A (en) * | 2023-04-07 | 2023-05-09 | 江苏多端科技有限公司 | Regulation and control system and regulation and control method for power factor of private transformer user side |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110011329B (en) | 2022-08-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110011329A (en) | Low-voltage power distribution station area powerless control method containing distributed photovoltaic | |
| CN105514966B (en) | A kind of direct-current grid group energy storage optimization and control method for coordinating | |
| CN108493950B (en) | Ultra-high voltage direct current near-region multi-stage power grid coordinated automatic voltage control method and system | |
| CN106487042B (en) | A kind of Multiple Time Scales micro-capacitance sensor voltage power-less optimized controlling method | |
| CN108683193B (en) | Voltage control method and device for power distribution network with distributed power supply | |
| CN109698507A (en) | A kind of phase modifier and Static Var Compensator control method for coordinating and system | |
| Bedawy et al. | An effective coordination strategy for voltage regulation in distribution system containing high intermittent photovoltaic penetrations | |
| CN106887858A (en) | A kind of energy-storage system tracking plan for accessing generation of electricity by new energy is exerted oneself method and device | |
| CN113131490B (en) | Reactive power control method, device and system for new energy station | |
| CN110034584A (en) | A kind of meter and the idle adaptive reactive voltage control method of abundance photovoltaic plant | |
| CN107230979B (en) | A kind of power grid automatic voltage optimal control method | |
| CN109659941A (en) | A kind of alternating current-direct current mixing micro-capacitance sensor autonomous control method and system | |
| CN106169760B (en) | Main website AVC system and substation SVG system coordination control method | |
| CN110808616A (en) | Micro-grid frequency control method based on power shortage distribution | |
| CN112087003B (en) | New energy centralized frequency correction control system and control method | |
| CN109558628A (en) | A kind of coordination optimizing method and system of real-time generation schedule | |
| CN106469913B (en) | A method of stabilizing flexible direct current power distribution network power swing | |
| CN113241777A (en) | Mobile energy storage system-based transformer area power stabilizing method and device | |
| Elizondo et al. | Literature survey on operational voltage control and reactive power management on transmission and sub-transmission networks | |
| CN108429280A (en) | A kind of passive power grid wide area virtual frequency control method and system | |
| CN111799810A (en) | Reactive power control method and system for alternating current-direct current system | |
| CN112186794A (en) | Reactive power control method and device for photovoltaic power station | |
| CN108365611A (en) | A kind of control method of the reactive-load compensation of photovoltaic power station | |
| CN107634523B (en) | New energy centralized grid-connected point reactive voltage control method based on multi-source grading coordination | |
| CN109659950A (en) | Become the powerless control system and method for the voltage source converter of lower voltage limit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |