CN106451477A - Reactive power voltage coordination control method adaptable to clustered wind-solar-electricity access system - Google Patents
Reactive power voltage coordination control method adaptable to clustered wind-solar-electricity access system Download PDFInfo
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- CN106451477A CN106451477A CN201610967362.7A CN201610967362A CN106451477A CN 106451477 A CN106451477 A CN 106451477A CN 201610967362 A CN201610967362 A CN 201610967362A CN 106451477 A CN106451477 A CN 106451477A
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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 a reactive power voltage coordination control method adaptable to a clustered wind-solar-electricity access system. A power grid serves as the highest level control layer, a power grid level control station selects a reactive power optimization mode or voltage control mode according to weak sending end voltage, a cluster level serves as a second highest level control layer, corresponding model calculation is performed according to a superior control command, a control objective is proposed to an inferior station, a terminal serves as a control layer and also an executive layer, local control is performed and action of an inferior wind generation set or a photovoltaic module is selected according to the control objective proposed by a superior station, the wind generation set/photovoltaic module is an executive layer, and reactive power adjusting action is executed according to the superior control command. The outstanding problem of complicated reactive power voltage of the clustered wind-solar-electricity access system in the prior art is solved, full-network voltage safe and stable operation is realized, and wind-solar-electricity capacity is maximized as much as possible.
Description
Technical field
The present invention relates to the reactive power/voltage control analysis of strategies method and technology field of cluster wind-light-electricity access system, specifically
Ground, is related to adapt to the reactive voltage control method for coordinating of cluster wind-light-electricity access system.
Background technology
The new energy development of China generally has the characteristics that Cluster Exploitation, light current net access, distance is sent outside.New forms of energy ripple
Dynamic property is strong, controllability is weak, concentrates access area often to lack normal power supplies and supports, reactive voltage outstanding problem, easily induction system
System security incident.
Content of the invention
It is an object of the invention to, for the problems referred to above, propose to adapt to the reactive voltage association of cluster wind-light-electricity access system
Control method, is strengthened with the complicated reactive voltage controllability realizing cluster wind-light-electricity access system, and reaches the whole network voltage
Safe and stable operation and as much as possible realize wind-light-electricity and exert oneself maximized advantage.
For achieving the above object, the technical solution used in the present invention is：Adapt to the idle electricity of cluster wind-light-electricity access system
Pressure control method for coordinating, main inclusion：
Step 1：Electrical network level controls master station to select idle work optimization pattern or voltage mode control according to weak sending end voltage, and will be corresponding
Idle work optimization order or voltage control command send to cluster level control station；
Step 2：If cluster level control station receives the idle work optimization order of electrical network level control station transmission, it is optimized calculating,
Voltage is run reference value UrefIt is issued to station level control station, and reference value is carried out with Fuzzy Processing, generate station level control station
Voltage range, then station level control station locally controlled, execution station be laterally adjusted, described voltage range is
[Urefmin, Urefmax]；
If cluster level control station receives the voltage control command of electrical network level control station transmission, cluster level control station is using preferential
Level selection method determines optimum station level control station, execution step 3；
Step 3：Station level control station is locally controlled according to the control command of cluster level control station, and selects subordinate's wind turbine
Group or photovoltaic module action；
Step 4：Wind turbines/photovoltaic module level executes Reactive-power control action according to station level superior command.
Further, in step 1, idle work optimization pattern or voltage mode control are selected specifically, sentencing according to weak sending end voltage
Whether the scope of weak sending end voltage of breaking be：0.9.p.u<Weak sending end voltage<1.1.p.u, if it is, executing idle work optimization mould
Formula, if not then executing voltage mode control.
Further, in described priority selection method, the priority order from high to low that station level controls is followed successively by：Away from
From higher level's control station recently, containing static reactive equipment, containing electric capacity/reactance, containing double-fed direct drive wind power unit and
Photovoltaic module containing voltage source grid-connected inverter..
Further, in step 3, described local control, specially judge busbar voltage too low/too high, according to SVC compensate
Capacitive/inductive reactive power, move back one group of reactance/electric capacity, reactance/electric capacity Periostracum Cicadae throws one group of electric capacity/reactance and electric capacity/reactance is complete throws in
Priority orders are controlled.
Further, in step 4, when also including process for voltage mode control, Wind turbines/photovoltaic module level executes nothing
After work(regulation action, judge that whether weak sending end voltage be：0.9.p.u<Weak sending end voltage<1.1.p.u, if it is, postponing one
The section time, the idle work optimization pattern in execution step 2, if it is not, then Wind turbines/photovoltaic module level execution lateral adjustments, and
Repeat step 3.
Further, described delay a period of time is specially and postpones 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
Including：Electrical network level is highest level key-course, and electrical network level control station selects idle work optimization pattern or electricity according to weak sending end voltage
Pressure control model；Cluster level is second highest rank key-course, according to higher level's control command, carries out corresponding model calculating to subordinate station
Control targe is proposed；Station level is key-course is also execution level, the control targe proposing according to higher level, is locally controlled simultaneously
Select subordinate's Wind turbines or photovoltaic module action；Wind turbine/photovoltaic module level is carried out layer, idle according to superior command execution
Regulation action；Such that it is able to overcome the complicated reactive voltage outstanding problem of cluster wind-light-electricity access system in prior art, realize
The whole network voltage security stable operation and as much as possible realize wind-light-electricity and exert oneself maximization advantage.
Other features and advantages of the present invention will illustrate in the following description, and, partly become from description
Obtain it is clear that or being understood by implementing the present invention.
Below by drawings and Examples, technical scheme is described in further detail.
Brief description
Accompanying drawing is used for providing a further understanding of the present invention, and constitutes a part for description, the reality with the present invention
Apply example and be used for explaining the present invention together, be not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the overall frame of reactive voltage control method for coordinating of the adaptation cluster wind-light-electricity access system described in the embodiment of the present invention
Frame figure；
Fig. 2 is the reactive voltage control method for coordinating flow process of the adaptation cluster wind-light-electricity access system described in the embodiment of the present invention
Figure；
Fig. 3 is the reactive voltage control method for coordinating description of the adaptation cluster wind-light-electricity access system described in the embodiment of the present invention
Priority selection method schematic diagram.
Specific embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are illustrated it will be appreciated that preferred reality described herein
Apply example to be merely to illustrate and explain the present invention, be 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 forms of energy
Send out the Cluster Exploitation that generally has, light current net accesses, the feature that distance is sent outside is it is proposed that the reactive voltage of machine-field-group-net
Coordination control strategy.This control strategy is the thinking based on " multilevel coordination refines step by step ", and strategy is divided into machine, field, group, net
Level Four control strategy, electrical network level is highest level key-course, and every grade of control station accepts higher level's control signal and as control mesh
Mark this grade of action of execution, sends control signal to subordinate station simultaneously, makes every effort to reach the whole network voltage security stable operation and most maximum
Wind-light-electricity can be enabled exert oneself maximization.
Specifically, the reactive voltage control method for coordinating adapting to cluster wind-light-electricity access system includes：
Step 1：Electrical network level controls master station to select idle work optimization pattern or voltage mode control according to weak sending end voltage, and will be corresponding
Idle work optimization order or voltage control command send to cluster level control station；
Step 2：If cluster level control station receives the idle work optimization order of electrical network level control station transmission, it is optimized calculating,
Voltage is run reference value UrefIt is issued to station level control station, and reference value is carried out with Fuzzy Processing, generate station level control station
Voltage range, then station level control station locally controlled, execution station be laterally adjusted, described voltage range is
[Urefmin, Urefmax], execution step 3；
If cluster level control station receives the voltage control command of electrical network level control station transmission, cluster level control station is using preferential
Level selection method determines optimum station level control station, execution step 3；
Step 3：Station level control station is locally controlled according to the control command of cluster level control station, and selects subordinate's wind turbine
Group or photovoltaic module action；
Step 4：Wind turbines/photovoltaic module level executes Reactive-power control action according to station level superior command.
In step 1, idle work optimization pattern or voltage mode control are selected specifically, judging weak sending end according to weak sending end voltage
Whether the scope of voltage be：0.9.p.u<Weak sending end voltage<1.1.p.u, if it is, executing idle work optimization pattern, if not
It is then to execute voltage mode control.
In described priority selection method, the priority order from high to low that station level controls is followed successively by：Apart from higher level's control
System station recently, containing static reactive equipment, containing electric capacity/reactance, containing double-fed direct drive wind power unit with contain voltage
The photovoltaic module of source grid-connected inverter..
In step 3, described local control, described local control, specially judge busbar voltage too low/too high, according to SVC
Compensate capacitive/inductive reactive power, move back one group of reactance/electric capacity, one group of electric capacity/reactance is thrown in reactance/electric capacity Periostracum Cicadae and electric capacity/reactance is thrown entirely
The priority orders put are controlled.
In step 4, when also including process for voltage mode control, Wind turbines/photovoltaic module level execution Reactive-power control moves
After work, judge that whether weak sending end voltage be：0.9.p.u<Weak sending end voltage<1.1.p.u, if it is, postponing a period of time, hold
Row step 2 idle work optimization pattern, if it is not, then Wind turbines/photovoltaic module level execution lateral adjustments, and repeat step 3.
Described delay a period of time is specially and postpones 5 minutes.
The basic goal adapting to the machine-field-group-net reactive power/voltage control strategy of cluster wind-light-electricity access system is for collection
Group wind-light-electricity access system complicated reactive voltage problem, from spatially decoupled multi-level simulation tool problem, be proposed for machine-field-group-
The control strategy of net, reaches the whole network voltage security stable operation and as much as possible realizes wind-light-electricity and exert oneself maximization.
The basic goal adapting to the machine-field-group-net reactive power/voltage control strategy of cluster wind-light-electricity access system is for collection
Group wind-light-electricity access system complicated reactive voltage problem, from spatially decoupled multi-level simulation tool problem, be proposed for machine-field-group-
The control strategy of net, reaches the whole network voltage security stable operation and as much as possible realizes wind-light-electricity and exert oneself maximization.
The step adapting to the machine-field-group-net reactive voltage control method for coordinating of cluster wind-light-electricity access system is as follows：
The first step：General thought
For achieving the above object, the overall framework devising control strategy herein is as shown in Figure 1.Control strategy is mainly by 4 parts
Composition：Electrical network level control strategy, cluster level control strategy, station level control strategy and wind turbine/photovoltaic module level control strategy.
Adapt to cluster scene electric system machine-field-group-net reactive power/voltage control strategy basic ideas are electrical network levels is highest
Rank key-course, electrical network level control station selects idle work optimization pattern or voltage mode control according to weak sending end voltage；Cluster level
It is second highest rank key-course, according to higher level's control command, carry out corresponding model calculating and propose control targe to subordinate station；Station
Level is key-course is also execution level, the control targe proposing according to higher level, is locally controlled and select subordinate's Wind turbines
Or photovoltaic module action；Wind turbine/photovoltaic module level is carried out layer, executes Reactive-power control action according to superior command.Realize this
The key of strategy is that cluster level Controlling model calculates and station level control strategy.
Second step：Control strategy embodiment
This control strategy as shown in Fig. 2 first determining whether whether the whole network weak sending end voltage operates in acceptability limit, voltage qualified enter
Enter idle work optimization pattern, voltage out-of-limit enters voltage mode control.Voltage mode control enters back into idle work optimization pattern after terminating,
Arrive minute level because voltage control time constant mostly is tens seconds, and Reactive power control time constant mostly is more than ten minutes to little
When level, therefore this method arranges the delay of 15 minutes after voltage control, make every effort to determine voltage qualified stable after enter idle excellent
Change pattern.Priority selecting sequence is as shown in Figure 3.In conjunction with Fig. 1 and Fig. 2：
The first step：Electrical network level controls master station to select idle work optimization pattern or voltage mode control according to weak sending end voltage；
Second step：If cluster level control station is connected to Reactive power control instruction, it is optimized calculating, issues station level control station
Voltage runs reference value,
If cluster level control station is connected to voltage control instructions, cluster level control station adopts priority selection method to determine optimum station
Level control station；
3rd step：The control targe that station level control station proposes according to cluster level control station, is locally controlled and is selected subordinate
Wind turbines or photovoltaic module action；
4th step：Wind turbine/photovoltaic module level executes Reactive-power control action according to superior command.
Following beneficial effect at least can be reached：Overcome that prior art new forms of energy undulatory property is strong, controllability is weak, concentrate and access
Area often lacks normal power supplies and supports, reactive voltage outstanding problem, and easily the defect of induction system security incident is it is achieved that complete
The wind-light-electricity that achieves of net voltage security stable operation and maximum possible is exerted oneself maximization.
Finally it should be noted that：The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention,
Although being described in detail to the present invention with reference to the foregoing embodiments, for a person skilled in the art, it still may be used
To modify to the technical scheme described in foregoing embodiments, or equivalent is carried out to wherein some technical characteristics.
All any modification, equivalent substitution and improvement within the spirit and principles in the present invention, made etc., should be included in the present invention's
Within protection domain.
Claims (6)
1. adapt to the reactive voltage control method for coordinating of cluster wind-light-electricity access system it is characterised in that including：
Step 1：Electrical network level controls master station to select idle work optimization pattern or voltage mode control according to weak sending end voltage, and will be corresponding
Idle work optimization order or voltage control command send to cluster level control station；
Step 2：If cluster level control station receives the idle work optimization order of electrical network level control station transmission, it is optimized calculating,
Voltage is run reference value UrefIt is issued to station level control station, and reference value is carried out with Fuzzy Processing, generate station level control station
Voltage range, then station level control station locally controlled, execution station be laterally adjusted, described voltage range is
[Urefmin, Urefmax]；
If cluster level control station receives the voltage control command of electrical network level control station transmission, cluster level control station is using preferential
Level selection method determines optimum station level control station, execution step 3；
Step 3：Station level control station is locally controlled according to the control command of cluster level control station, and selects subordinate's wind turbine
Group or photovoltaic module action；
Step 4：Wind turbines/photovoltaic module level executes Reactive-power control action according to station level superior command.
2. the reactive voltage control method for coordinating adapting to cluster wind-light-electricity access system according to claim 1, its feature
Being, in step 1, idle work optimization pattern or voltage mode control being selected specifically, judging weak sending end voltage according to weak sending end voltage
Scope be whether：0.9.p.u<Weak sending end voltage<1.1.p.u, if it is, executing idle work optimization pattern, if not then
Execution voltage mode control.
3. the reactive voltage control method for coordinating adapting to cluster wind-light-electricity access system according to claim 2, its feature
It is, in step 2, in described priority selection method, the priority order from high to low that station level controls is followed successively by：Apart from upper
Level control station recently, containing static reactive equipment, containing electric capacity/reactance, containing double-fed direct drive wind power unit with contain
The photovoltaic module of voltage source grid-connected inverter.
4. the reactive voltage control method for coordinating adapting to cluster wind-light-electricity access system according to claim 3, its feature
Be, in step 3, described local control, specially judge busbar voltage too low/too high, compensate capacitive/perception nothing according to SVC
Work(, move back one group of reactance/electric capacity, one group of electric capacity/reactance is thrown in reactance/electric capacity Periostracum Cicadae and the full priority orders thrown in of electric capacity/reactance
It is controlled.
5. the reactive voltage control method for coordinating adapting to cluster wind-light-electricity access system according to claim 4, its feature
It is, in step 4, when also including process for voltage mode control, Wind turbines/photovoltaic module level execution Reactive-power control action
Afterwards, judge that whether weak sending end voltage be：0.9.p.u<Weak sending end voltage<1.1.p.u, if it is, postponing a period of time, execution
Idle work optimization pattern in step 2, if it is not, then Wind turbines/photovoltaic module level execution lateral adjustments, and repeat step 3.
6. the reactive voltage control method for coordinating adapting to cluster wind-light-electricity access system according to claim 5, its feature
It is, described delay a period of time is specially and postpones 5 minutes.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107196316A (en) * | 2017-06-21 | 2017-09-22 | 上海电力学院 | Multistage reactive voltage control method for coordinating in active distribution network |
| CN110580659A (en) * | 2018-06-08 | 2019-12-17 | 神华集团有限责任公司 | Intelligent structure of energy system of nano network based on multi-dimensional heterogeneous data flow driving and control method thereof |
| CN111602307A (en) * | 2018-01-10 | 2020-08-28 | 通用电气公司 | System and method for optimizing reactive power generation of wind farm |
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| 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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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196316A (en) * | 2017-06-21 | 2017-09-22 | 上海电力学院 | Multistage reactive voltage control method for coordinating in active distribution network |
| CN107196316B (en) * | 2017-06-21 | 2019-12-27 | 上海电力学院 | Multi-stage reactive voltage coordination control method in active power distribution network |
| CN111602307A (en) * | 2018-01-10 | 2020-08-28 | 通用电气公司 | System and method for optimizing reactive power generation of wind farm |
| CN111602307B (en) * | 2018-01-10 | 2023-08-18 | 通用电气公司 | System and method for optimizing reactive power generation of wind farm |
| CN110580659A (en) * | 2018-06-08 | 2019-12-17 | 神华集团有限责任公司 | Intelligent structure of energy system of nano network based on multi-dimensional heterogeneous data flow driving and control method thereof |
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