METHOD AND DEVICE FOR ESTABLISHING TRANSMISSION LINE ON/OFF SWITCHING COMBINATION SCHEME FOR LIMITING SHORT CIRCUIT CURRENT - ECONOMIC AND TECH RESEARCH INSTITUTE OF STATE GRID HEBEI ELECTRIC POWER CO LTD

Title:

METHOD AND DEVICE FOR ESTABLISHING TRANSMISSION LINE ON/OFF SWITCHING COMBINATION SCHEME FOR LIMITING SHORT CIRCUIT CURRENT

Document Type and Number:

WIPO Patent Application WO/2020/135894

Kind Code:

A2

Abstract:

The invention provides a method and device for establishing a transmission line on/off switching combination scheme for limiting short circuit current. The method applies to the technical field of power systems, and comprises: setting an initial number k of lines to be switched off and a maximum number kmax of lines to be switched off; determining, for each node to be tested among a plurality of nodes to be tested, a k-self impedance upon switching off k lines; determining, on the basis of the k-self impedance of each of said nodes, k lines that meet scheme requirements and k lines that do not meet scheme requirements; on the basis of a preset step length d, increasing the initial number k of lines to be switched off to k+d; when k+d≤kmax, considering those nodes among the k lines that do not meet scheme requirements as nodes to be tested, and returning to the step of determining, for each node to be tested among a plurality of nodes to be tested, a k-self impedance upon switching off k lines, and then proceeding to the subsequent step; when k+d>kmax or when the current set of nodes to be tested is null, determining that the establishment of the transmission line on/off switching combination scheme is complete. The method and device for establishing a transmission line on/off switching combination scheme for limiting short circuit current allows for an on/off switching combination scheme to be established quickly.

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Inventors:

ZHANG ZHANG (CN)
YUAN BO (CN)
WANG YING (CN)
WANG TAO (CN)
SHAO HUA (CN)
KANG WEI (CN)
CHEN LIANG (CN)
ZHANG LIJIE (CN)
YANG YANG (CN)
SHEN YONGPENG (CN)
LI GUANGYI (CN)

Application Number:

PCT/CN2020/076792

Publication Date:

July 02, 2020

Filing Date:

February 26, 2020

Export Citation:

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Assignee:

ECONOMIC AND TECH RESEARCH INSTITUTE OF STATE GRID HEBEI ELECTRIC POWER CO LTD (CN)

International Classes:

H02J3/14

Attorney, Agent or Firm:

BEYOND ATTORNEYS AT LAW (CN)

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