CN110048446A - A kind of method and system of the determining layering best drop point of direct current access system receiving end - Google Patents

A kind of method and system of the determining layering best drop point of direct current access system receiving end Download PDF

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Publication number
CN110048446A
CN110048446A CN201910218156.XA CN201910218156A CN110048446A CN 110048446 A CN110048446 A CN 110048446A CN 201910218156 A CN201910218156 A CN 201910218156A CN 110048446 A CN110048446 A CN 110048446A
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direct current
current
layering
indicate
change
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林伟芳
汤涌
易俊
郭强
余芳芳
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China Electric Power Research Institute Co Ltd CEPRI
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China Electric Power Research Institute Co Ltd CEPRI
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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
    • H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
    • 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]
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

The invention discloses a kind of method and system of determining layering best drop point of direct current access system receiving end, belong to technical field of power systems.The method of the present invention comprises determining that n drop point of the receiving-end system of layering direct current access, establishes AC system equivalence nodal impedance matrix when layering direct current drop point is i and s；The capacity of short circuit of change of current bus is determined according to the equivalent node impedance；The layering direct-current short circuit ratio of ac and dc systems is determined according to the equivalent node impedance of AC system and DC converter busbar short-circuit capacity；The best drop point of layering direct current access is determined according to the index of characterization ac and dc systems power.This invention ensures that the safe and stable operation of the ac and dc systems of extra-high voltage layering direct current access, the best drop point according to direct-current short circuit than selection layering direct current access, provide the judgment basis of planning and operation for work about electric power personnel.

Description

A kind of method and system of the determining layering best drop point of direct current access system receiving end
Technical field
The present invention relates to technical field of power systems, and more particularly, to a kind of determining layering direct current access system The method and system of the best drop point of receiving end.
Background technique
Since china natural resources, distribution of productive force are unbalanced, 80% or more energy resources be distributed in it is western, northern, 70% Above electricity consumption concentrates on east, south, and supply and demand needs remote, large capacity energy electricity at a distance of 800~3000 kilometers Power conveying, therefore the same receiving end AC system (load center) of a plurality of direct current drop point is inevitable.At present in State Grid Corporation of China In region within the jurisdiction, put into operation 21 direct currents, wherein 9 extra-high voltage direct-currents.China has formed DC voltage level highest in the world, The alternating current-direct current power grid that single time direct current transportation capacity is maximum, direct current transportation is largest has been formed simultaneously most with East China, Guangdong two Feed-in ac and dc systems.With the promotion of DC voltage level, transmission line capability, voltage power-less enabling capabilities to receiving end power grid and Trend evacuation brings baptism.Extra-high voltage direct-current layer-specific access does not stop the AC network of voltage class, significantly improves receiving end The receiving ability and voltage support ability of AC system are saved valuable soil and corridor resource, are shown to power transmission efficiency is improved Promotion economic and social benefit is write to play a significant role.For the receiving-end system of direct current layer-specific access, Voltage-stabilizing Problems are more It is complicated, on the one hand, the interaction of direct current system and neighbouring AC system may cause voltage problem；On the other hand, if direct current Drop point is concentrated in receiving-end system, then can also generate interaction between different direct current systems, and voltage problem is further expanded Greatly, the successive commutation failure for then causing direct current, ultimately causes large-scale power failure.And according to planning, China creates extra-high High-capacity direct current power transmission engineering is pressed, will more and more access receiving end AC network in a hierarchical manner.Short-circuit ratio is commonly used in rule Draw early period, measure ac and dc systems in AC system power, the power of AC system be largely fixed exchange and The property and relevant issues of direct current system interaction.
Summary of the invention
In view of the above-mentioned problems, the invention proposes a kind of method of determining layering best drop point of direct current access system receiving end, Include:
N drop point for determining layering direct current access receiving-end system establishes AC system when layering direct current drop point is i and s Equivalent nodal impedance matrix, certainty equivalents node impedance；
The i and s is any layering direct current drop point；
The capacity of short circuit of change of current bus is determined according to the equivalent node impedance；
The layering of ac and dc systems is determined according to the equivalent node impedance of AC system and DC converter busbar short-circuit capacity Direct-current short circuit ratio；
The best drop point of layering direct current access is determined according to the index of characterization ac and dc systems power.
Optionally, impedance matrix such as following formula:
Wherein, ZeqIndicate that the equivalent nodal impedance matrix of AC system, T indicate that transposition, n indicate the change of current in ac and dc systems Bus sum, MnIndicate that the interconnection vector of change of current bus n, Z indicate the nodal impedance matrix of AC system, ZeqnnIndicate Zeq? N row, the n-th column element；M1, M2... MnIt respectively indicates are as follows:
……
Wherein, k indicates the node total number in AC system.
Optionally, the capacity of short circuit of DC converter bus, capacity formula are calculated according to the equivalent node impedance of AC system It is as follows:
Wherein, SaciIndicate the capacity of short circuit of change of current bus i in multi-infeed HVDC system, UiIndicate multi-infeed HVDC system The voltage magnitude of middle change of current bus i, ZeqiiIndicate ZeqThe i-th row, the i-th column element.
Optionally, ac and dc systems are determined according to the equivalent node impedance of AC system and DC converter busbar short-circuit capacity Layering direct-current short circuit ratio, short-circuit ratio formula is as follows:
Wherein, SSCRiIndicate the direct-current short circuit ratio of change of current bus i in layering direct current system, PdiIndicate layering direct current system The dc power of middle change of current bus i, PdsFor the dc power of other end change of current bus s in layering direct current system, PdjIt is alternating current-direct current The dc power of other change of current buses in system in addition to change of current bus i, ZeqijIndicate ZeqThe i-th row, jth column element, ZeqsiIndicate ZeqS row, the i-th column element, ZeqsS indicates ZeqS row, s column element.
Optionally, the best drop point of layering direct current access is determined according to the index of characterization ac and dc systems power specifically:
According to ac and dc systems relative strength index, the short-circuit ratio under layering direct current access system receiving end access way is sentenced It is disconnected, determine the best drop point of layering direct current access.
The invention also provides a kind of systems of determining layering best drop point of direct current access system receiving end, comprising:
First computing module determines n drop point of layering direct current access receiving-end system, and establishing layering direct current drop point is i and s When AC system equivalence nodal impedance matrix, certainty equivalents node impedance；
The i and s is any layering direct current drop point；
Second computing module determines the capacity of short circuit of change of current bus according to the equivalent node impedance；
Third computing module is determined according to the equivalent node impedance of AC system and DC converter busbar short-circuit capacity and is handed over directly The layering direct-current short circuit ratio of streaming system；
Drop point determining module determines the best drop point of layering direct current access according to the index of characterization ac and dc systems power.
Optionally, impedance matrix such as following formula:
Wherein, ZeqIndicate that the equivalent nodal impedance matrix of AC system, T indicate that transposition, n indicate the change of current in ac and dc systems Bus sum, MnIndicate that the interconnection vector of change of current bus n, Z indicate the nodal impedance matrix of AC system, ZeqnnIndicate Zeq? N row, the n-th column element；M1, M2... MnIt respectively indicates are as follows:
……
Wherein, k indicates the node total number in AC system.
Optionally, the capacity of short circuit of DC converter bus, capacity formula are calculated according to the equivalent node impedance of AC system It is as follows:
Wherein, SaciIndicate the capacity of short circuit of change of current bus i in multi-infeed HVDC system, UiIndicate multi-infeed HVDC system The voltage magnitude of middle change of current bus i, ZeqiiIndicate ZeqThe i-th row, the i-th column element.
Optionally, ac and dc systems are determined according to the equivalent node impedance of AC system and DC converter busbar short-circuit capacity Layering direct-current short circuit ratio, short-circuit ratio formula is as follows:
Wherein, SSCRiIndicate the direct-current short circuit ratio of change of current bus i in layering direct current system, PdiIndicate layering direct current system The dc power of middle change of current bus i, PdsFor the dc power of other end change of current bus s in layering direct current system, PdjIt is alternating current-direct current The dc power of other change of current buses in system in addition to change of current bus i, ZeqijIndicate ZeqThe i-th row, jth column element, ZeqsiIndicate ZeqS row, the i-th column element, ZeqsS indicates ZeqS row, s column element.
Optionally, the best drop point of layering direct current access is determined according to the index of characterization ac and dc systems power specifically:
According to ac and dc systems relative strength index, the short-circuit ratio under layering direct current access system receiving end access way is sentenced It is disconnected, and then determine the best drop point of layering direct current access.
This invention ensures that the safe and stable operation of the ac and dc systems of extra-high voltage layering direct current access, according to direct-current short circuit Than the best drop point of selection layering direct current access, the judgment basis of planning and operation is provided for work about electric power personnel.
Detailed description of the invention
Fig. 1 is a kind of method flow diagram of the determining layering best drop point of direct current access system receiving end of the present invention；
Fig. 2 is a kind of system construction drawing of the determining layering best drop point of direct current access system receiving end of the present invention.
Specific embodiment
Exemplary embodiments of the present invention are introduced referring now to the drawings, however, the present invention can use many different shapes Formula is implemented, and is not limited to the embodiment described herein, and to provide these embodiments be at large and fully disclose The present invention, and the scope of the present invention is sufficiently conveyed to person of ordinary skill in the field.Show for what is be illustrated in the accompanying drawings Term in example property embodiment is not limitation of the invention.In the accompanying drawings, identical cells/elements use identical attached Icon note.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has person of ordinary skill in the field It is common to understand meaning.Further it will be understood that with the term that usually used dictionary limits, should be understood as and its The context of related fields has consistent meaning, and is not construed as Utopian or too formal meaning.
The present invention provides a kind of methods of determining layering best drop point of direct current access system receiving end, as shown in Figure 1, packet It includes:
N drop point for determining layering direct current access receiving-end system establishes AC system when layering direct current drop point is i and s Equivalent nodal impedance matrix, certainty equivalents node impedance；
The i and s is any layering direct current drop point；
Impedance matrix such as following formula:
Wherein, ZeqIndicate that the equivalent nodal impedance matrix of AC system, T indicate that transposition, n indicate the change of current in ac and dc systems Bus sum, MnIndicate that the interconnection vector of change of current bus n, Z indicate the nodal impedance matrix of AC system, ZeqnnIndicate Zeq? N row, the n-th column element；M1, M2... MnIt respectively indicates are as follows:
……
Wherein, k indicates the node total number in AC system.
The capacity of short circuit of change of current bus is determined according to the equivalent node impedance；
Capacity formula is as follows:
Wherein, SaciIndicate the capacity of short circuit of change of current bus i in multi-infeed HVDC system, UiIndicate multi-infeed HVDC system The voltage magnitude of middle change of current bus i, ZeqiiIndicate ZeqThe i-th row, the i-th column element.
The layering of ac and dc systems is determined according to the equivalent node impedance of AC system and DC converter busbar short-circuit capacity Direct-current short circuit ratio；
Short-circuit ratio formula is as follows:
Wherein, SSCRiIndicate the direct-current short circuit ratio of change of current bus i in layering direct current system, PdiIndicate layering direct current system The dc power of middle change of current bus i, PdsFor the dc power of other end change of current bus s in layering direct current system, PdjIt is alternating current-direct current The dc power of other change of current buses in system in addition to change of current bus i, ZeqijIndicate ZeqThe i-th row, jth column element, ZeqsiIndicate ZeqS row, the i-th column element, ZeqsS indicates ZeqS row, s column element.
According to ac and dc systems relative strength index, the short-circuit ratio under layering direct current access system receiving end access way is sentenced It is disconnected, determine the best drop point of layering direct current access.
The present invention is illustrated by embodiment 1 and embodiment 2.
Establish the equivalent node impedance square that layering direct current drop point is respectively the AC system of change of current bus i and change of current bus s Battle array:
Embodiment 1
For having a certain power grid of A, B two layering direct current accesses, determine that the 500kV change of current bus of layering direct current A is compiled Number for 1, the 1000kV change of current bus number be 2, be layered DC B the 500kV change of current bus number be 3,1000kV change of current bus compile It number is 4, then corresponding equivalent nodal impedance matrix are as follows:
The capacity of short circuit of DC converter bus is calculated according to the equivalent node impedance of AC system:
The layering of ac and dc systems is determined according to the equivalent node impedance of AC system and DC converter busbar short-circuit capacity Direct-current short circuit ratio:
Successively calculate other change of current buses layering direct-current short circuit than be respectively SSCR2=2.53, SSCR3=2.18, SSCR4=2.37.
The direct-current short circuit ratio that layering direct current accesses different drop points is calculated separately according to above step:
Embodiment 2
The drop point for being layered DC B is constant, changes the drop point of layering direct current A, if new grid structure lower leaf direct current A 500kV change of current bus number is that 1,1000kV change of current bus number is 2, and the 500kV change of current bus number for being layered DC B is 3, 1000kV change of current bus number is 4, acquires layering direct-current short circuit than being respectively SSCR1=3.10, SSCR2=according to above-mentioned steps 3.07, SSCR3=2.26, SSCR4=2.46.
According to the index of characterization ac and dc systems power, and then determine the best drop point of layering direct current access:
Layering direct-current short circuit ratio under more above two power grid architecture, it can be seen that the short-circuit ratio under second scheme is big Short-circuit ratio under the first scheme, and then determine that the drop point under second scheme is the best drop point for being layered direct current.
The invention also provides a kind of systems 200 of determining layering best drop point of direct current access system receiving end, such as Fig. 2 institute Show, comprising:
First computing module 201 determines n drop point of layering direct current access receiving-end system, and establishing layering direct current drop point is i With AC system equivalence nodal impedance matrix when s, certainty equivalents node impedance；
The i and s is any layering direct current drop point；
Impedance matrix such as following formula:
Wherein, ZeqIndicate that the equivalent nodal impedance matrix of AC system, T indicate that transposition, n indicate the change of current in ac and dc systems Bus sum, MnIndicate that the interconnection vector of change of current bus n, Z indicate the nodal impedance matrix of AC system, ZeqnnIndicate Zeq? N row, the n-th column element；M1, M2... MnIt respectively indicates are as follows:
……
Wherein, k indicates the node total number in AC system.
Second computing module 202 determines the capacity of short circuit of change of current bus according to the equivalent node impedance；
Capacity formula is as follows:
Wherein, SaciIndicate the capacity of short circuit of change of current bus i in multi-infeed HVDC system, UiIndicate multi-infeed HVDC system The voltage magnitude of middle change of current bus i, ZeqiiIndicate ZeqThe i-th row, the i-th column element.
Third computing module 203 is determined according to the equivalent node impedance of AC system and DC converter busbar short-circuit capacity The layering direct-current short circuit ratio of ac and dc systems；
Short-circuit ratio formula is as follows:
Wherein, SSCRiIndicate the direct-current short circuit ratio of change of current bus i in layering direct current system, PdiIndicate layering direct current system The dc power of middle change of current bus i, PdsFor the dc power of other end change of current bus s in layering direct current system, PdjIt is alternating current-direct current The dc power of other change of current buses in system in addition to change of current bus i, ZeqijIndicate ZeqThe i-th row, jth column element, ZeqsiIndicate ZeqS row, the i-th column element, ZeqsS indicates ZeqS row, s column element.
Drop point determining module 204, according to ac and dc systems relative strength index, to layering direct current access system receiving end access way Under short-circuit ratio judged, and then determine layering direct current access best drop point.
This invention ensures that the safe and stable operation of the ac and dc systems of extra-high voltage layering direct current access, according to direct-current short circuit Than the best drop point of selection layering direct current access, the judgment basis of planning and operation is provided for work about electric power personnel.

Claims (10)

1. a kind of method of the determining layering best drop point of direct current access system receiving end, the method include:
N drop point for determining layering direct current access receiving-end system, the AC system established when layering direct current drop point is i and s are equivalent Nodal impedance matrix, certainty equivalents node impedance；
The i and s is any layering direct current drop point；
The capacity of short circuit of change of current bus is determined according to the equivalent node impedance；
The layering direct current of ac and dc systems is determined according to the equivalent node impedance of AC system and DC converter busbar short-circuit capacity Short-circuit ratio；
The best drop point of layering direct current access is determined according to the index of characterization ac and dc systems power.
2. according to the method described in claim 1, the impedance matrix such as following formula:
Wherein, ZeqIndicate that the equivalent nodal impedance matrix of AC system, T indicate that transposition, n indicate change of current bus in ac and dc systems Sum, MnIndicate that the interconnection vector of change of current bus n, Z indicate the nodal impedance matrix of AC system, ZeqnnIndicate ZeqLine n, N-th column element；M1, M2... MnIt respectively indicates are as follows:
……
Wherein, k indicates the node total number in AC system.
3. according to the method described in claim 1, described calculate DC converter mother according to the equivalent node impedance of AC system The capacity of short circuit of line, capacity formula are as follows:
Wherein, SaciIndicate the capacity of short circuit of change of current bus i in multi-infeed HVDC system, UiIndicate the change of current in multi-infeed HVDC system The voltage magnitude of bus i, ZeqiiIndicate ZeqThe i-th row, the i-th column element.
4. according to the method described in claim 1, the equivalent node impedance and DC converter bus according to AC system Capacity of short circuit determines that the layering direct-current short circuit ratio of ac and dc systems, short-circuit ratio formula are as follows:
Wherein, SSCRiIndicate the direct-current short circuit ratio of change of current bus i in layering direct current system, PdiIt indicates to change in layering direct current system Flow the dc power of bus i, PdsFor the dc power of other end change of current bus s in layering direct current system, PdjIt is ac and dc systems In other change of current buses in addition to change of current bus i dc power, ZeqijIndicate ZeqThe i-th row, jth column element, ZeqsiTable Show ZeqS row, the i-th column element, ZeqsS indicates ZeqS row, s column element.
5. according to the method described in claim 1, the index according to characterization ac and dc systems power determines layering direct current The best drop point of access specifically:
According to ac and dc systems relative strength index, the short-circuit ratio under layering direct current access system receiving end access way is judged, Determine the best drop point of layering direct current access.
6. a kind of system of the determining layering best drop point of direct current access system receiving end, the system include:
First computing module determines n drop point of layering direct current access system, establishes exchanging when layering direct current drop point is i with s System equivalent nodal impedance matrix, certainty equivalents node impedance；
The i and s is any layering direct current drop point；
Second computing module determines the capacity of short circuit of change of current bus according to the equivalent node impedance；
Third computing module determines alternating current-direct current system according to the equivalent node impedance of AC system and DC converter busbar short-circuit capacity The layering direct-current short circuit ratio of system；
Drop point determining module determines the best drop point of layering direct current access according to the index of characterization ac and dc systems power.
7. system according to claim 6, the impedance matrix such as following formula:
Wherein, ZeqIndicate that the equivalent nodal impedance matrix of AC system, T indicate that transposition, n indicate change of current bus in ac and dc systems Sum, MnIndicate that the interconnection vector of change of current bus n, Z indicate the nodal impedance matrix of AC system, ZeqnnIndicate ZeqLine n, N-th column element；M1, M2... MnIt respectively indicates are as follows:
……
Wherein, k indicates the node total number in AC system.
8. system according to claim 6, described to calculate DC converter mother according to the equivalent node impedance of AC system The capacity of short circuit of line, capacity formula are as follows:
Wherein, SaciIndicate the capacity of short circuit of change of current bus i in multi-infeed HVDC system, UiIndicate the change of current in multi-infeed HVDC system The voltage magnitude of bus i, ZeqiiIndicate ZeqThe i-th row, the i-th column element.
9. system according to claim 6, the equivalent node impedance and DC converter bus according to AC system Capacity of short circuit determines that the layering direct-current short circuit ratio of ac and dc systems, short-circuit ratio formula are as follows:
Wherein, SSCRiIndicate the direct-current short circuit ratio of change of current bus i in layering direct current system, PdiIt indicates to change in layering direct current system Flow the dc power of bus i, PdsFor the dc power of other end change of current bus s in layering direct current system, PdjIt is ac and dc systems In other change of current buses in addition to change of current bus i dc power, ZeqijIndicate ZeqThe i-th row, jth column element, ZeqsiTable Show ZeqS row, the i-th column element, ZeqsS indicates ZeqS row, s column element.
10. system according to claim 6, the index according to characterization ac and dc systems power determines layering direct current The best drop point of access specifically:
According to ac and dc systems relative strength index, the short-circuit ratio under layering direct current access system receiving end access way is judged, And then determine the best drop point of layering direct current access.
CN201910218156.XA 2019-03-21 2019-03-21 A kind of method and system of the determining layering best drop point of direct current access system receiving end Pending CN110048446A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110729757A (en) * 2019-09-18 2020-01-24 国网江苏省电力有限公司 System and method for determining grid-connected capacity of near-direct-current drop point wind power plant
CN112054515A (en) * 2020-08-28 2020-12-08 武汉大学 Receiving-end power grid DC receiving capacity detection method based on multi-objective optimization
CN112068027A (en) * 2020-08-26 2020-12-11 华北电力大学 Method for identifying short-circuit ratio of flexible direct-current transmission alternating-current system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102623987A (en) * 2012-03-26 2012-08-01 中国电力科学研究院 Multiple-DC (direct current)-droppoint selection method based on multiple feed-in short circuit ratios
CN102723726A (en) * 2012-06-01 2012-10-10 中国电力科学研究院 Method for determining maximal direct current receiving quantity in alternating current receiving system
CN105914739A (en) * 2016-06-22 2016-08-31 华南理工大学 Network equivalence-based fall point selection method in DC pole access mode
CN105932724A (en) * 2015-11-30 2016-09-07 东南大学 Evaluation method of stability of hybrid system under a manner of extra-high voltage direct-current layered connection
CN109004690A (en) * 2017-06-07 2018-12-14 中国电力科学研究院 A kind of determination method and apparatus of the direct-current short circuit ratio of layering direct current system access

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102623987A (en) * 2012-03-26 2012-08-01 中国电力科学研究院 Multiple-DC (direct current)-droppoint selection method based on multiple feed-in short circuit ratios
CN102723726A (en) * 2012-06-01 2012-10-10 中国电力科学研究院 Method for determining maximal direct current receiving quantity in alternating current receiving system
CN105932724A (en) * 2015-11-30 2016-09-07 东南大学 Evaluation method of stability of hybrid system under a manner of extra-high voltage direct-current layered connection
CN105914739A (en) * 2016-06-22 2016-08-31 华南理工大学 Network equivalence-based fall point selection method in DC pole access mode
CN109004690A (en) * 2017-06-07 2018-12-14 中国电力科学研究院 A kind of determination method and apparatus of the direct-current short circuit ratio of layering direct current system access

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
李传栋等: "特高压直流分层接入方式的落点选择研究", 《福建工程学院学报》 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110729757A (en) * 2019-09-18 2020-01-24 国网江苏省电力有限公司 System and method for determining grid-connected capacity of near-direct-current drop point wind power plant
CN110729757B (en) * 2019-09-18 2021-11-02 国网江苏省电力有限公司 System and method for determining grid-connected capacity of near-direct-current drop point wind power plant
CN112068027A (en) * 2020-08-26 2020-12-11 华北电力大学 Method for identifying short-circuit ratio of flexible direct-current transmission alternating-current system
CN112068027B (en) * 2020-08-26 2023-01-17 华北电力大学 Method for identifying short-circuit ratio of flexible direct-current transmission alternating-current system
CN112054515A (en) * 2020-08-28 2020-12-08 武汉大学 Receiving-end power grid DC receiving capacity detection method based on multi-objective optimization

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