CN109802435A - A kind of energy storage configuration place selection method of wind power integration system - Google Patents
A kind of energy storage configuration place selection method of wind power integration system Download PDFInfo
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- CN109802435A CN109802435A CN201910073481.1A CN201910073481A CN109802435A CN 109802435 A CN109802435 A CN 109802435A CN 201910073481 A CN201910073481 A CN 201910073481A CN 109802435 A CN109802435 A CN 109802435A
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- 230000010354 integration Effects 0.000 title claims abstract description 41
- 238000004146 energy storage Methods 0.000 title claims abstract description 35
- 238000010187 selection method Methods 0.000 title claims abstract description 12
- 230000035945 sensitivity Effects 0.000 claims abstract description 18
- 238000010606 normalization Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 230000005684 electric field Effects 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
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- Y02E10/76—Power conversion electric or electronic aspects
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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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The present invention relates to a kind of energy storage of wind power integration system to configure place selection method, comprising the following steps: step S1: wind-electricity integration node being carried out equivalent；Step S2: it is by multiport Thevenin's equivalence that local system is equivalent at bi-nodal system, and calculate the unstable index of each node voltage of wind power integration system；Step S3: sensitivity index of the node to voltage stability key place of each configurable energy storage is calculated;Step S4: calculating is normalized in obtained sensitivity index；Step S5: predetermined threshold level K, and the node that sensitivity index is less than K is weeded out, obtain the set in the wind power integration system stored energy configuration place that can be effectively improved voltage stability.The present invention is advantageously selected for the energy storage configuration place of wind power integration system voltage stability in the case where considering voltage stability according to network architecture, real-time system information and actual measurement output of wind electric field situation.
Description
Technical field
The invention belongs to technical field of power systems, and in particular to a kind of wind power integration system storage for considering voltage stability
It can place configuration method.
Background technique
In the electric system of current wind power integration, the investment cost and operating cost in energy storage place, Yi Jiping are mainly taken
Pressing down intermittent energy source fluctuation is that foundation carries out the configuration of energy storage place, however energy storage device still may be used other than it can provide power output
Multiple functions are taken into account, reasonable energy storage configuration place can be effectively improved the voltage stability of wind power integration system.Therefore, it is necessary to
A kind of wind power integration system stored energy place configuration method for considering system voltage stability is designed, Lai Tigao electric system energy storage is set
Standby comprehensive utilization, the electric system that intermittent energy source permeability is continuously improved are of great significance.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of energy storage of wind power integration system to configure place selection method,
According to network architecture, real-time system information and actual measurement output of wind electric field situation, select to have in the case where considering voltage stability
Place is configured conducive to the energy storage of wind power integration system voltage stability.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of energy storage configuration place selection method of wind power integration system, comprising the following steps:
Step S1: wind-electricity integration node is carried out equivalent；
Step S2: it is by multiport Thevenin's equivalence that local system is equivalent at bi-nodal system, and calculate wind power integration system
Each unstable index of node voltage；
Step S3: sensitivity index of the node to voltage stability key place of each configurable energy storage is calculated;
Step S4: calculating is normalized in obtained sensitivity index；
Step S5: predetermined threshold level K, and the node that sensitivity index is less than K is weeded out, it obtains that voltage stability can be effectively improved
Wind power integration system stored energy configuration place set.
Further, the step S1 specifically:
Wind-electricity integration node injecting power is equivalent to node ground connection admittance
Wherein、Indicate the active and reactive power of wind-powered electricity generation injection；Indicate wind-electricity integration node voltage.
Further, the step S2 specifically:
Step S21: regard wind power integration node as load bus that load is negative;
Step S22: and then multiport Thevenin's equivalence is utilized, multinode power grid is equivalent at nodeiTwo impedances, two node power grid,
Each node voltage stability of wind power integration system, index are calculated with spread of voltage index are as follows:
Wherein: wherein、For nodeiAnd nodejInjecting power conjugate vector；、For nodeiAnd nodejSection
Point voltage；、For nodeiAnd nodejNode voltage conjugate vector；For nodejWith nodeiMutual impedance；
For nodeiFor system equivalent impedance.
1. further, the step S3 specifically: spread of voltage indexSystem voltage stability is embodied, with
The maximum node of spread of voltage index is system voltage stability key node:
Assuming that nodeiSpread of voltage index be up to wind power integration system voltage stability key node, then can extract can
Reflect the node of configurable energy storagejWith voltage stability key nodeiBetween sensitivity index:
The node of configurable energy storage can effectively be embodiedjTo voltage stability key nodeiSpread of voltage index's
Improvement.
Further, it normalizes and calculates described in step S4 specifically:
Wherein:For nodejNormalization after sensitivity index；For the maximum value of all node sensitivity indexs.
Compared with the prior art, the invention has the following beneficial effects:
Present invention only requires the node amplitudes and output of wind electric field situation of knowing partial electric grid information, energy storage node, can obtain
To the selection method in the energy storage configuration place for considering system voltage stability.It is compared to existing method, i.e., simple and quick, and can fill
Energy storage device effect is waved in distribution, improves system voltage stability.
Detailed description of the invention
Fig. 1 is the method for the present invention flow chart；
Fig. 2 is two impedance of node i, two node power grid of the present invention；
Fig. 3 is IEEE14 node diagram in the embodiment of the present invention.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and embodiments.
Fig. 1 is please referred to, the present invention provides a kind of energy storage configuration place selection method of wind power integration system, including following step
Rapid: the present embodiment calculated examples select IEEE14 node system, as shown in Figure 3.Node 2 is wind power integration node, wherein can match
The place for setting energy storage is 4,11,13,14 nodes.
Step S1: wind-electricity integration node is carried out to equivalent, calculating wind power integration node equivalent admittance are as follows:
Each load bus voltage stability of wind power integration system is calculated, as a result such as table 1
Each load bus spread of voltage index of table 1
| Node ID | |
| 14 | 0.658181 |
| 9 | 0.345479 |
| 10 | 0.31502 |
| 7 | 0.175554 |
| 11 | 0.159696 |
| 4 | 0.118989 |
| 5 | 0.079097 |
| 13 | 0.054656 |
Step S2: the spread of voltage index of node 14Being up to is 0.658181, is system voltage stability key section
Point, to achieve the purpose that improve system voltage stability, is considered as when configuration place is contributed to node when configuring energy storage place
The improvement result of 14 voltage stabilities.It is by Thevenin's equivalence, complex electric network is equivalent at nodeiTwo impedances, two node power grid,
Its result is as shown in Figure 2.
Step S3: the index of reflecting voltage risk symptoms node and reactive compensation place substantial connection is calculatedS i , result such as table 2
It is shown.Spread of voltage indexSystem voltage stability is embodied, using the maximum node of spread of voltage index as system electricity
Press stability key node:
Assuming that nodeiSpread of voltage index be up to wind power integration system voltage stability key node, then can extract can
Reflect the node of configurable energy storagejWith voltage stability key nodeiBetween sensitivity index:
The node of configurable energy storage can effectively be embodiedjTo voltage stability key nodeiSpread of voltage index's
Improvement.
Each alternative energy storage configuration node of table 2 is to node 14SIndex
| Node ID | SIndex |
| 14 | 1.267787 |
| 9 | 0.373303 |
| 13 | 0.262324 |
| 11 | 0.147517 |
| 4 | 0.061516 |
Step S4: obtained index is normalized, the results are shown in Table 3
Normalized:
Wherein:For nodejNormalization after sensitivity index；For the maximum value of all node sensitivity indexs.
Normalization index of each alternative energy storage configuration node of table 3 to node 14
| Node ID | Index |
| 14 | 1 |
| 9 | 0.294453 |
| 13 | 0.206915 |
| 11 | 0.116357 |
| 4 | 0.048522 |
Step S5: one threshold value of settingK=0.2, it weeds out index and is less thanKNode, obtain significant energy storage configuration node,
Node 14, node 9, node 13.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification, is all covered by the present invention.
Claims (5)
1. a kind of energy storage of wind power integration system configures place selection method, which comprises the following steps:
Step S1: wind-electricity integration node is carried out equivalent；
Step S2: it is by multiport Thevenin's equivalence that local system is equivalent at bi-nodal system, and calculate wind power integration system
Each unstable index of node voltage；
Step S3: sensitivity index of the node to voltage stability key place of each configurable energy storage is calculated;
Step S4: calculating is normalized in obtained sensitivity index；
Step S5: predetermined threshold level K, and the node that sensitivity index is less than K is weeded out, it obtains that voltage stability can be effectively improved
Wind power integration system stored energy configuration place set.
2. a kind of energy storage of wind power integration system according to claim 1 configures place selection method, it is characterised in that:
The step S1 specifically:
Wind-electricity integration node injecting power is equivalent to node ground connection admittance
Wherein、Indicate the active and reactive power of wind-powered electricity generation injection；Indicate wind-electricity integration node voltage.
3. a kind of energy storage of wind power integration system according to claim 1 configures place selection method, it is characterised in that:
The step S2 specifically:
Step S21: regard wind power integration node as load bus that load is negative;
Step S22: and then multiport Thevenin's equivalence is utilized, multinode power grid is equivalent at nodeiTwo impedances, two node power grid,
Each node voltage stability of wind power integration system, index are calculated with spread of voltage index are as follows:
Wherein: wherein、For nodeiAnd nodejInjecting power conjugate vector；、For nodeiAnd nodejNode
Voltage；、For nodeiAnd nodejNode voltage conjugate vector；For nodejWith nodeiMutual impedance；
For nodeiFor system equivalent impedance.
4. a kind of energy storage of wind power integration system according to claim 3 configures place selection method, it is characterised in that:
The step S3 specifically: spread of voltage indexSystem voltage stability is embodied, it is maximum with spread of voltage index
Node is system voltage stability key node:
Assuming that nodeiSpread of voltage index be up to wind power integration system voltage stability key node, then can extract can
Reflect the node of configurable energy storagejWith voltage stability key nodeiBetween sensitivity index:
The node of configurable energy storage can effectively be embodiedjTo voltage stability key nodeiSpread of voltage indexChange
Kind effect.
5. a kind of energy storage of wind power integration system according to claim 1 configures place selection method, it is characterised in that:
The normalization of the step S4 calculates specifically:
Wherein:For nodejNormalization after sensitivity index；For the maximum value of all node sensitivity indexs.
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| CN110071505A (en) * | 2019-06-04 | 2019-07-30 | 清华大学 | The power transmission network enlarging of the access containing large-scale wind power configures joint planing method with energy storage |
| CN110556868A (en) * | 2019-09-25 | 2019-12-10 | 国网福建省电力有限公司 | wind power access system energy storage charging and discharging control method considering voltage stability |
| CN110912164A (en) * | 2019-12-13 | 2020-03-24 | 国网福建省电力有限公司 | Green energy island energy storage capacity configuration method considering voltage stability |
| CN111460753A (en) * | 2020-05-09 | 2020-07-28 | 国网湖南省电力有限公司 | Method for calculating influence of new energy machine group access on Thevenin equivalent parameters of power grid |
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Cited By (6)
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| CN110912164A (en) * | 2019-12-13 | 2020-03-24 | 国网福建省电力有限公司 | Green energy island energy storage capacity configuration method considering voltage stability |
| CN111460753A (en) * | 2020-05-09 | 2020-07-28 | 国网湖南省电力有限公司 | Method for calculating influence of new energy machine group access on Thevenin equivalent parameters of power grid |
| CN111460753B (en) * | 2020-05-09 | 2022-04-08 | 国网湖南省电力有限公司 | Method for calculating influence of new energy machine group access on Thevenin equivalent parameters of power grid |
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