CN106451477B - Adapt to the reactive voltage control method for coordinating of cluster wind-light-electricity access system - Google Patents
Adapt to the reactive voltage control method for coordinating of cluster wind-light-electricity access system Download PDFInfo
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- CN106451477B CN106451477B CN201610967362.7A CN201610967362A CN106451477B CN 106451477 B CN106451477 B CN 106451477B CN 201610967362 A CN201610967362 A CN 201610967362A CN 106451477 B CN106451477 B CN 106451477B
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- 238000011217 control strategy Methods 0.000 description 17
- 230000006978 adaptation Effects 0.000 description 4
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Classifications
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- 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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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- H02J3/382—
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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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- 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
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Abstract
The invention discloses the reactive voltage control method for coordinating for adapting to cluster wind-light-electricity access system, comprising: power grid grade is highest level control layer, and power grid grade control station selects idle work optimization mode or voltage mode control according to weak sending end voltage；Cluster grade is time high-level control layer, according to higher level's control command, carries out corresponding model calculating to subordinate station and proposes control target；Station grade is both control layer and execution level, according to the control target that higher level proposes, carries out local control and junior's Wind turbines or photovoltaic module is selected to act；Wind turbine/photovoltaic module grade is execution level, executes Reactive-power control movement according to superior command；Overcome the complicated reactive voltage outstanding problem of cluster wind-light-electricity access system in the prior art, realize whole network voltage safe and stable operation and as much as possible realizes that wind-light-electricity power output maximizes.
Description
Technical field
The present invention relates to the reactive power/voltage control analysis of strategies method and technology fields of cluster wind-light-electricity access system, specifically
Ground is related to adapting to the reactive voltage control method for coordinating of cluster wind-light-electricity access system.
Background technique
The new energy development in China generally has the characteristics that Cluster Exploitation, weak grid access, sends outside over long distances.New energy wave
Dynamic property is strong, controllability is weak, and access area is concentrated often to lack normal power supplies support, and reactive voltage outstanding problem is easy to induce system
System safety accident.
Summary of the invention
It is an object of the present invention in view of the above-mentioned problems, propose that the reactive voltage for adapting to cluster wind-light-electricity access system is assisted
Control method to realize the complicated reactive voltage controllability enhancing of cluster wind-light-electricity access system, and reaches whole network voltage
Safe and stable operation and the as much as possible maximized advantage of realization wind-light-electricity power output.
To achieve the above object, the technical solution adopted by the present invention is that: adapt to cluster wind-light-electricity access system idle electricity
Control method for coordinating is pressed, is specifically included that
Step 1: power grid grade controls master station and selects idle work optimization mode or voltage mode control according to weak sending end voltage, and will
Corresponding idle work optimization order or voltage control command are sent to cluster grade control station；
Step 2: if cluster grade control station receives the idle work optimization order of power grid grade control station transmission, optimizing meter
It calculates, voltage is run into reference value UrefIt is issued to station grade control station, and Fuzzy Processing is carried out to reference value, generates station grade control
System station voltage range, then grade control station in station carries out local control, executes station and is laterally adjusted, the voltage range is
[Urefmin, Urefmax]；
If cluster grade control station receives the voltage control command of power grid grade control station transmission, cluster grade control station is used
Priority back-and-forth method determines optimal station grade control station, executes step 3；
Step 3: station grade control station carries out local control according to the control command of cluster grade control station, and selects junior's wind
Motor group or photovoltaic module movement；
Step 4: Wind turbines/photovoltaic module grade executes Reactive-power control according to station grade superior command and acts.
Further, select idle work optimization mode or voltage mode control specifically, sentencing according to weak sending end voltage in step 1
Break weak sending end voltage range whether are as follows: 0.9.p.u < weak sending end voltage < 1.1.p.u, if it is, execute idle work optimization mould
Formula, if not then executing voltage mode control.
Further, in the priority back-and-forth method, the sequence of the priority of station grade control from high to low is successively are as follows: away from
From higher level's control station recently, containing static reactive equipment, containing capacitor/reactance, containing double-fed direct drive wind power unit and
Photovoltaic module containing voltage source grid-connected inverter.
Further, in step 3, the local control specially judges that busbar voltage is too low/excessively high, compensates according to SVC
Capacitive/inductive reactive power, move back one group of reactance/capacitor, reactance/capacitor moves back entirely and throws one group of capacitor/reactance and capacitor/reactance and launch entirely
Priority orders are controlled.
Further, in step 4, when to further include process be voltage mode control, Wind turbines/photovoltaic module grade execute nothing
After function adjusting movement, whether weak sending end voltage is judged are as follows: 0.9.p.u < weak sending end voltage < 1.1.p.u, if it is, delay one
The section time executes the idle work optimization mode in step 2, if it is not, then Wind turbines/photovoltaic module grade executes lateral adjustments, and
Repeat step 3.
Further, described delay a period of time is specially delay 5 minutes.
The reactive voltage control method for coordinating of the adaptation cluster wind-light-electricity access system of various embodiments of the present invention, due to main
It include: power grid grade is highest level control layer, power grid grade control station selects idle work optimization mode or electricity according to weak sending end voltage
Press control model；Cluster grade is time high-level control layer, and foundation higher level's control command carries out corresponding model calculating to subordinate station
It is proposed control target；Station grade is both control layer and execution level, and according to the control target that higher level proposes, the local control of progress is simultaneously
Select junior's Wind turbines or photovoltaic module movement；Wind turbine/photovoltaic module grade is execution level, is executed according to superior command idle
Adjusting movement；So as to overcome the complicated reactive voltage outstanding problem of cluster wind-light-electricity access system in the prior art, realize
Whole network voltage safe and stable operation and as much as possible realization wind-light-electricity power output maximization advantage.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings:
Fig. 1 is that the reactive voltage control method for coordinating of adaptation cluster wind-light-electricity access system described in the embodiment of the present invention is total
Body frame diagram；
Fig. 2 is the reactive voltage control method for coordinating stream that cluster wind-light-electricity access system is adapted to described in the embodiment of the present invention
Cheng Tu；
Fig. 3 is that the reactive voltage control method for coordinating of adaptation cluster wind-light-electricity access system described in the embodiment of the present invention is retouched
The priority back-and-forth method schematic diagram stated.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Wind-light-electricity cluster is grid-connected to propose new challenge to reactive power/voltage control.The present invention is opened by analyzing China's new energy
The Cluster Exploitation generally having is sent out, weak grid access the characteristics of sending outside over long distances, proposes machine-field-group-net reactive voltage
Coordination control strategy.This control strategy is that strategy is divided into machine, field, group, net based on the thinking of " multilevel coordination refines step by step "
Level Four control strategy, power grid grade are highest level control layers, and every grade of control station receives higher level and controls signal and as control mesh
Mark executes the same level movement, while issuing control signal to subordinate station, makes every effort to reach whole network voltage safe and stable operation and most maximum
Wind-light-electricity power output can be able to achieve to maximize.
Specifically, the reactive voltage control method for coordinating of adaptation cluster wind-light-electricity access system includes:
Step 1: power grid grade controls master station and selects idle work optimization mode or voltage mode control according to weak sending end voltage, and will
Corresponding idle work optimization order or voltage control command are sent to cluster grade control station；
Step 2: if cluster grade control station receives the idle work optimization order of power grid grade control station transmission, optimizing meter
It calculates, voltage is run into reference value UrefIt is issued to station grade control station, and Fuzzy Processing is carried out to reference value, generates station grade control
System station voltage range, then grade control station in station carries out local control, executes station and is laterally adjusted, the voltage range is
[Urefmin, Urefmax], execute step 3；
If cluster grade control station receives the voltage control command of power grid grade control station transmission, cluster grade control station is used
Priority back-and-forth method determines optimal station grade control station, executes step 3；
Step 3: station grade control station carries out local control according to the control command of cluster grade control station, and selects junior's wind
Motor group or photovoltaic module movement；
Step 4: Wind turbines/photovoltaic module grade executes Reactive-power control according to station grade superior command and acts.
Select idle work optimization mode or voltage mode control specifically, judging weak sending end according to weak sending end voltage in step 1
Whether the range of voltage are as follows: 0.9.p.u < weak sending end voltage < 1.1.p.u, if it is, idle work optimization mode is executed, if not
It is to execute voltage mode control.
In the priority back-and-forth method, the sequence of the priority of station grade control from high to low is successively are as follows: controls apart from higher level
System station recently, containing static reactive equipment, containing capacitor/reactance, containing double-fed direct drive wind power unit and contain voltage
The photovoltaic module of source grid-connected inverter.
In step 3, the local control, the local control specially judges that busbar voltage is too low/excessively high, according to SVC
Compensation capacitive/inductive reactive power, move back one group of reactance/capacitor, reactance/capacitor moves back entirely and throws one group of capacitor/reactance and capacitor/reactance and throw entirely
The priority orders put are controlled.
In step 4, when to further include process be voltage mode control, it is dynamic that Wind turbines/photovoltaic module grade execute Reactive-power control
After work, whether weak sending end voltage is judged are as follows: 0.9.p.u < weak sending end voltage < 1.1.p.u, if it is, delay a period of time, holds
Row step 2 idle work optimization mode if it is not, then Wind turbines/photovoltaic module grade executes lateral adjustments, and repeats step 3.
Described delay a period of time is specially delay 5 minutes.
Machine-field-group-net reactive power/voltage control strategy the basic goal for adapting to cluster wind-light-electricity access system is for collection
The complicated reactive voltage problem of group's wind-light-electricity access system proposes to be directed to machine-field-group-from spatially decoupled multi-level simulation tool problem
The control strategy of net reaches whole network voltage safe and stable operation and as much as possible realizes that wind-light-electricity power output maximizes.
Machine-field-group-net reactive power/voltage control strategy the basic goal for adapting to cluster wind-light-electricity access system is for collection
The complicated reactive voltage problem of group's wind-light-electricity access system proposes to be directed to machine-field-group-from spatially decoupled multi-level simulation tool problem
The control strategy of net reaches whole network voltage safe and stable operation and as much as possible realizes that wind-light-electricity power output maximizes.
The step of adapting to machine-field-group-net reactive voltage control method for coordinating of cluster wind-light-electricity access system is as follows:
Step 1: general thought
To achieve the above object, the overall framework for devising control strategy herein is as shown in Figure 1.Control strategy is mainly by 4
Part forms: power grid grade control strategy, cluster grade control strategy, station grade control strategy and wind turbine/photovoltaic module grade control
Strategy.
Adapting to machine-field-group-of cluster scene electric system, net reactive power/voltage control strategy basic ideas are power grid grades is highest
Rank control layer, power grid grade control station select idle work optimization mode or voltage mode control according to weak sending end voltage；Cluster grade
It is time high-level control layer, according to higher level's control command, carries out corresponding model calculating to subordinate station and propose control target；Station
Grade is both that control layer and execution level carry out local control and select junior's Wind turbines according to the control target that higher level proposes
Or photovoltaic module movement；Wind turbine/photovoltaic module grade is execution level, executes Reactive-power control movement according to superior command.Realize this
The key of strategy is that cluster grade Controlling model calculates and station grade control strategy.
Step 2: control strategy embodiment
As shown in Fig. 2, first determining whether the weak sending end voltage of the whole network operates in acceptability limit, voltage closes this control strategy
Lattice enter idle work optimization mode, and voltage out-of-limit enters voltage mode control.Idle work optimization is entered back into after voltage mode control
Mode, since voltage control time constant is mostly tens seconds to minute grade, and Reactive power control time constant was mostly ten a few minutess
Clock is to hour grade, therefore delay in 15 minutes is arranged in this method after voltage control, makes every effort to enter after determining voltage qualification is stablized
Idle work optimization mode.Priority selecting sequence is as shown in Figure 3.In conjunction with Fig. 1 and Fig. 2:
Step 1: power grid grade, which controls master station, selects idle work optimization mode or voltage mode control according to weak sending end voltage；
Step 2: optimizing calculating if cluster grade control station is connected to Reactive power control instruction, station grade control is issued
System station voltage runs reference value,
If cluster grade control station is connected to voltage control instructions, cluster grade control station is determined optimal using priority back-and-forth method
Station grade control station；
Step 3: the control target that station grade control station is proposed according to cluster grade control station, carries out local control and selects
Junior's Wind turbines or photovoltaic module movement；
Step 4: wind turbine/photovoltaic module grade executes Reactive-power control movement according to superior command.
It at least can achieve following the utility model has the advantages that overcoming that prior art new energy fluctuation is strong, controllability is weak, concentrate access
Area often lacks normal power supplies support, and reactive voltage outstanding problem is easy the defect of induction system safety accident, realizes complete
The wind-light-electricity power output that realizes of the stable operation of net voltage security and maximum possible maximizes.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (5)
1. adapting to the reactive voltage control method for coordinating of cluster wind-light-electricity access system characterized by comprising
Step 1: power grid grade controls master station and selects idle work optimization mode or voltage mode control according to weak sending end voltage, and will be corresponding
Idle work optimization order or voltage control command be sent to cluster grade control station；
Step 2: if cluster grade control station receives the idle work optimization order of power grid grade control station transmission, calculating is optimized,
Voltage operation reference value Uref is issued to station grade control station, and Fuzzy Processing is carried out to reference value, generates station grade control
It stands voltage range, then grade control station in station carries out local control, executes station and is laterally adjusted, the voltage range is
[Urefmin, Urefmax]；
If cluster grade control station receives the voltage control command of power grid grade control station transmission, cluster grade control station is using preferential
Grade back-and-forth method determines optimal station grade control station, executes step 3；
Step 3: station grade control station carries out local control according to the control command of cluster grade control station, and selects junior's wind turbine
Group or photovoltaic module movement；
Step 4: Wind turbines/photovoltaic module grade executes Reactive-power control according to station grade superior command and acts；
Select idle work optimization mode or voltage mode control specifically, judging weak sending end voltage according to weak sending end voltage in step 1
Range whether are as follows: 0.9.p.u < weak sending end voltage < 1.1.p.u, if it is, execute idle work optimization mode, if not then
Execute voltage mode control.
2. the reactive voltage control method for coordinating according to claim 1 for adapting to cluster wind-light-electricity access system, feature
It is, in step 2, in the priority back-and-forth method, the sequence of the priority of station grade control from high to low is successively are as follows: apart from upper
Grade control station recently, containing static reactive equipment, containing capacitor/reactance, containing double-fed direct drive wind power unit and contain
The photovoltaic module of voltage source grid-connected inverter.
3. the reactive voltage control method for coordinating according to claim 2 for adapting to cluster wind-light-electricity access system, feature
It is, in step 3, the local control specially judges that busbar voltage is too low/excessively high, compensates capacitive/perception nothing according to SVC
Function, move back one group of reactance/capacitor, reactance/capacitor moves back entirely and throws the priority orders that one group of capacitor/reactance and capacitor/reactance are launched entirely
It is controlled.
4. the reactive voltage control method for coordinating according to claim 3 for adapting to cluster wind-light-electricity access system, feature
It is, in step 4, when to further include process be voltage mode control, Wind turbines/photovoltaic module grade execute Reactive-power control movement
Afterwards, whether judge weak sending end voltage are as follows: 0.9.p.u < weak sending end voltage < 1.1.p.u, if it is, delay a period of time, executes
Idle work optimization mode in step 2 if it is not, then Wind turbines/photovoltaic module grade executes lateral adjustments, and repeats step 3.
5. the reactive voltage control method for coordinating according to claim 4 for adapting to cluster wind-light-electricity access system, feature
It is, described delay a period of time is specially delay 5 minutes.
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| US10554044B2 (en) * | 2018-01-10 | 2020-02-04 | General Electric Company | System and method for optimizing reactive power generation of a wind farm |
| CN110580659B (en) * | 2018-06-08 | 2022-06-21 | 国家能源投资集团有限责任公司 | Intelligent structure of energy system of nano network based on multi-dimensional heterogeneous data flow driving and control method thereof |
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| CN103208803A (en) * | 2013-04-18 | 2013-07-17 | 国家电网公司 | Reactive voltage optimal control method for wind electricity and photo-electricity integrated grid connection |
| CN103280812A (en) * | 2013-04-27 | 2013-09-04 | 国家电网公司 | Reactive voltage optimal control method for wind power plant cluster |
| CN104319775A (en) * | 2014-09-27 | 2015-01-28 | 国家电网公司 | Reactive power voltage control method applicable to large-scale wind power integration |
| CN105656055A (en) * | 2016-01-25 | 2016-06-08 | 东北大学 | Wind power plant clustered reactive power and voltage optimized control system and control method thereof |
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| CN103208803A (en) * | 2013-04-18 | 2013-07-17 | 国家电网公司 | Reactive voltage optimal control method for wind electricity and photo-electricity integrated grid connection |
| CN103280812A (en) * | 2013-04-27 | 2013-09-04 | 国家电网公司 | Reactive voltage optimal control method for wind power plant cluster |
| CN104319775A (en) * | 2014-09-27 | 2015-01-28 | 国家电网公司 | Reactive power voltage control method applicable to large-scale wind power integration |
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