CN108199381A - A kind of cutting load place selection method for wind power integration system voltage stability - Google Patents
A kind of cutting load place selection method for wind power integration system voltage stability Download PDFInfo
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- CN108199381A CN108199381A CN201810048121.1A CN201810048121A CN108199381A CN 108199381 A CN108199381 A CN 108199381A CN 201810048121 A CN201810048121 A CN 201810048121A CN 108199381 A CN108199381 A CN 108199381A
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- 230000010354 integration Effects 0.000 title claims abstract description 9
- 238000010187 selection method Methods 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 7
- 230000021615 conjugation Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
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- H02J3/386—
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
-
- 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
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention relates to a kind of cutting load place selection methods for wind power integration system voltage stability.According to real-time electric power system network architecture, suitable cutting load place is selected by calculating, is included the following steps：Step S1, the partial electric grid of a multinode is given；Step S2, the equivalent bi-nodal system into single supply list load of partial electric grid is calculated by index of each node to voltage hazard place by Thevenin's equivalence；Step S3, one threshold value m is set, weed out the node that index is less than m, and index is carried out according to sequence from big to small, obtain effective cutting load place.The method of the present invention can survey network impedance information, the online effective cutting load place of real-time selection according to wide area dynamic information system.
Description
Technical field
The invention belongs to technical field of power systems, and in particular to a kind of cutting for wind power integration system voltage stability
Load place selection method.
Background technology
Wind-powered electricity generation is environmental-friendly clean energy resource, but since output power is unstable, and extensive utilize will be to system voltage
Stability adversely affects.Therefore, in wind-powered electricity generation output pulsation, it is critically important to find suitable cutting load place.
The selection in cutting load place is determined in electric system, there is highly important influence for the effect of regulation and control, not
Same control place needs different controlled quentity controlled variables to can be only achieved expected effect.
The current Voltage Drop mainly having for the selection in electric system cutting load place through each load bus of the whole network
The calculating of amplitude chooses cutting load place as with reference to foundation using the voltage deviation of cutting load node for waiting to select,
Or more complicated algorithm is generally required, to all kinds of so as to obtain relevant Transient Voltage Stability index by system equivalent
Technology requires all relatively strictly, therefore, to design a kind of convenient and simple cutting load place selection method for improving electric system
The feasibility of stability and scheme is all of great significance.
The present invention determines K indexs from multiport Dai Weinan equivalents according to network impedance and load impedance, then according to
Index size is ranked up each node, removes the smaller node of K indexs, finally obtains suitable cutting load place.
Invention content
The purpose of the present invention is to provide a kind of cutting load place selecting partys for wind power integration system voltage stability
Method, this method method can survey network impedance information according to wide area dynamic information system, and online real-time selection is effectively cut negative
Lotus place.
To achieve the above object, the technical scheme is that：A kind of cutting for wind power integration system voltage stability
Load place selection method according to real-time electric power system network architecture, selects suitable cutting load place, including such as by calculating
Lower step：
Step S1, the partial electric grid of a multinode is given；
Step S2, it by Thevenin's equivalence by the equivalent bi-nodal system into single supply list load of partial electric grid, calculates each
Node is to the index in voltage hazard place；
Step S3, one threshold value m is set, weed out the node that index is less than m, and index is suitable according to from big to small
Sequence carries out, and obtains effective cutting load place.
In an embodiment of the present invention, the step S2 specific implementations process is：
It is by Thevenin's equivalence, complicated partial electric grid is equivalent into two impedance of node i, two node power grid；Calculate reflecting voltage
Location at risk contacts the index Ki of tightness degree with potential cutting load place；
Wherein：Conjugation for node i network impedance inverse；Conjugation for node i load impedance.
Compared to the prior art, the invention has the advantages that：Present invention only requires the impedances for knowing partial electric grid
Information can select suitable cutting load place.Compared to the cutting load place according to determined by voltage swing, more can accurately have
Effect improves the voltage stability of voltage hazard node.
Description of the drawings
Fig. 1 is sample calculation IEEE14 node diagrams.
Fig. 2 is two impedance of node i, two node power grid.
Fig. 3 is the flow chart of cutting load place selection.
Specific embodiment
Technical scheme of the present invention is specifically described in 1-3 below in conjunction with the accompanying drawings.
As shown in figure 3, a kind of cutting load place selection method for wind power integration system voltage stability of the present invention,
According to real-time electric power system network architecture, suitable cutting load place is selected by calculating, is included the following steps：
Step S1, the partial electric grid of a multinode is given；
Step S2, it by Thevenin's equivalence by the equivalent bi-nodal system into single supply list load of partial electric grid, calculates each
Node to the index in voltage hazard place, it is specific i.e.：
In an embodiment of the present invention, the step S2 specific implementations process is：
It is by Thevenin's equivalence, complicated partial electric grid is equivalent into two impedance of node i, two node power grid；Calculate reflecting voltage
Location at risk contacts the index Ki of tightness degree with potential cutting load place；
Wherein：Conjugation for node i network impedance inverse；Conjugation for node i load impedance；
Step S3, one threshold value m is set, weed out the node that index is less than m, and index is suitable according to from big to small
Sequence carries out, and obtains effective cutting load place.
A specific embodiment for the present invention below.
By taking IEEE14 node systems as an example (as shown in Figure 1).Certain moment breaks between node 13 and node 14, section
Point 14 becomes voltage hazard node.
The first step：By Thevenin's equivalence, complex electric network is equivalent into two impedance of node i, two node power grid, and result is such as
Shown in Fig. 2.
Second step：Reflecting voltage risk symptoms node and the index Ki of potential cutting load place substantial connection are calculated, result is such as
Shown in table 1.
Each potential cutting load node of table 1 is to the K indexs of node 14
Third walks：One threshold value m=0.2 is set, weeds out the node that index is less than m, and by the index according to from big
It is ranked up to small sequence, obtains effective cutting load place, be in order node 14, node 9, node 10.
The above are preferred embodiments of the present invention, all any changes made according to the technical solution of the present invention, and generated function is made
During with range without departing from technical solution of the present invention, all belong to the scope of protection of the present invention.
Claims (2)
1. a kind of cutting load place selection method for wind power integration system voltage stability, which is characterized in that according to real-time
Power system network structure selects suitable cutting load place by calculating, includes the following steps：
Step S1, the partial electric grid of a multinode is given；
Step S2, the equivalent bi-nodal system into single supply list load of partial electric grid is calculated by each node by Thevenin's equivalence
To the index in voltage hazard place；
Step S3, set a threshold value m, weed out index be less than m node, and by index according to sequence from big to small into
Row, obtains effective cutting load place.
2. a kind of cutting load place selection method for wind power integration system voltage stability according to claim 1,
It is characterized in that, the step S2 specific implementations process is：
It is by Thevenin's equivalence, complicated partial electric grid is equivalent into two impedance of node i, two node power grid；It is dangerous to calculate reflecting voltage
Place contacts the index Ki of tightness degree with potential cutting load place；
Wherein：Conjugation for node i network impedance inverse；Conjugation for node i load impedance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810048121.1A CN108199381A (en) | 2018-01-18 | 2018-01-18 | A kind of cutting load place selection method for wind power integration system voltage stability |
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| CN201810048121.1A CN108199381A (en) | 2018-01-18 | 2018-01-18 | A kind of cutting load place selection method for wind power integration system voltage stability |
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| CN108199381A true CN108199381A (en) | 2018-06-22 |
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| CN201810048121.1A Pending CN108199381A (en) | 2018-01-18 | 2018-01-18 | A kind of cutting load place selection method for wind power integration system voltage stability |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879707A (en) * | 2018-07-10 | 2018-11-23 | 福州大学 | A kind of online sort method in power system reactive power compensation place |
| CN108899912A (en) * | 2018-07-10 | 2018-11-27 | 福州大学 | A kind of online sort method in cutting load place improving voltage stability |
| CN108923439A (en) * | 2018-07-10 | 2018-11-30 | 福州大学 | A kind of on-line selection method in the effective reactive compensation place of electric system |
| CN108923433A (en) * | 2018-07-10 | 2018-11-30 | 福州大学 | A kind of effective cutting load place on-line selection method improving voltage stability |
| CN109586307A (en) * | 2018-12-11 | 2019-04-05 | 宁波市电力设计院有限公司 | A kind of load shedding control method of offshore wind farm access system |
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| US20140253013A1 (en) * | 2010-12-03 | 2014-09-11 | Sony Corporation | Electricity distribution system and electricity distribution method |
| CN104778367A (en) * | 2015-04-20 | 2015-07-15 | 山东大学 | On-line wide-area Thevenin equivalent parameter calculation method based on single state section |
-
2018
- 2018-01-18 CN CN201810048121.1A patent/CN108199381A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20140253013A1 (en) * | 2010-12-03 | 2014-09-11 | Sony Corporation | Electricity distribution system and electricity distribution method |
| CN104778367A (en) * | 2015-04-20 | 2015-07-15 | 山东大学 | On-line wide-area Thevenin equivalent parameter calculation method based on single state section |
Non-Patent Citations (1)
| Title |
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| 王晶: "基于多端口等值的电压稳定在线监视及切负荷控制研究", 《中国优秀硕士学位论文全文数据库》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879707A (en) * | 2018-07-10 | 2018-11-23 | 福州大学 | A kind of online sort method in power system reactive power compensation place |
| CN108899912A (en) * | 2018-07-10 | 2018-11-27 | 福州大学 | A kind of online sort method in cutting load place improving voltage stability |
| CN108923439A (en) * | 2018-07-10 | 2018-11-30 | 福州大学 | A kind of on-line selection method in the effective reactive compensation place of electric system |
| CN108923433A (en) * | 2018-07-10 | 2018-11-30 | 福州大学 | A kind of effective cutting load place on-line selection method improving voltage stability |
| CN109586307A (en) * | 2018-12-11 | 2019-04-05 | 宁波市电力设计院有限公司 | A kind of load shedding control method of offshore wind farm access system |
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Application publication date: 20180622 |