Title:
METHOD FOR EVALUATING SECURITY OF CLOSED-LOOP OPERATION OF MEDIUM-VOLTAGE DISTRIBUTION NETWORK
Document Type and Number:
WIPO Patent Application WO/2019/233437
Kind Code:
A1
Abstract:
Disclosed is a method for evaluating the security of a closed-loop operation of a medium-voltage distribution network. The method includes: on the basis of acquired topological structures and device parameters of a closed-loop network, and acquired real-time running data before loop closing of the closed-loop network, estimating a state of a high-voltage distribution network to obtain voltage amplitude values and phase angles of 10kV buses at head ends of closed-loop feeders; selecting a ratio of an active load of each load point on each of the closed-loop feeders to the active power at the head end of the feeder and a ratio of a reactive load of each load point on the closed-loop feeder to the reactive power at the head end of the feeder as input variables, and calculating, on the basis of historical load data of each load point, a multi-order semi-invariant of each of the input variables; calculating a certainty power flow and closed-loop currents; calculating multi-order semi-invariants of the closed-loop currents; obtaining the cumulative probability distribution of the closed-loop currents; and calculating the limit violation probability of each of the closed-loop currents, and determining that a closed-loop operation has security insofar as the multiple limit violation probabilities are all less than a pre-set threshold value.
Inventors:
ZHOU ZIQIANG (CN)
ZHANG YAN (CN)
FENG NAN (CN)
GUO QIANG (CN)
LIAN HONGBO (CN)
CHEN YANG (CN)
YU YINGHUI (CN)
ZHANG YAN (CN)
FENG NAN (CN)
GUO QIANG (CN)
LIAN HONGBO (CN)
CHEN YANG (CN)
YU YINGHUI (CN)
Application Number:
PCT/CN2019/090120
Publication Date:
December 12, 2019
Filing Date:
June 05, 2019
Export Citation:
Assignee:
SHANGHAI MUNICIPAL ELECTRIC POWER COMPANY (CN)
UNIV SHANGHAI JIAOTONG (CN)
UNIV SHANGHAI JIAOTONG (CN)
International Classes:
H02J3/00
Foreign References:
| CN108711851A | 2018-10-26 | |||
| CN107038653A | 2017-08-11 | |||
| CN106026085A | 2016-10-12 | |||
| CN104965968A | 2015-10-07 |
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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