Title:
METHOD AND DEVICE FOR ESTIMATING SOURCE IMPEDANCES ACROSS ONE OR MORE TRANSMISSION LINES
Document Type and Number:
Japanese Patent JP2022049007
Kind Code:
A
Abstract:
To provide an improvement method for source impedance estimation across one or more transmission lines connecting at least two substations.SOLUTION: Each substation is associated with an equivalent source having a respective source impedance. Voltage, current measurement values, and status signals are acquired. The voltage and current measurement values provide terminal or bus voltages and line currents at each terminal, and the status signals are related to switching events at one or more transmission lines or at the substations. An event related to disturbance or current injection is detected from one or more of the acquired measurement values and the acquired status signals. The source impedance of each equivalent source is estimated on the basis of the event using line parameters and the voltage and current measurement values related to the event.SELECTED DRAWING: Figure 2
Inventors:
VEDANTA PRADHAN
OD NAIDU
OD NAIDU
Application Number:
JP2021148865A
Publication Date:
March 28, 2022
Filing Date:
September 13, 2021
Export Citation:
Assignee:
HITACHI ENERGY SWITZERLAND AG
International Classes:
G01R31/08; H02J3/00; H02J13/00
Domestic Patent References:
| JP2001016762A | 2001-01-19 | |||
| JP2017017832A | 2017-01-19 | |||
| JPS6111673A | 1986-01-20 | |||
| JPH0670449A | 1994-03-11 | |||
| JP2017208902A | 2017-11-24 | |||
| JPS61207130A | 1986-09-13 |
Foreign References:
| US4559491A | 1985-12-17 | |||
| WO2020144150A1 | 2020-07-16 |
Attorney, Agent or Firm:
Fukami patent office
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