Title:
POWER FLOW MONITORING DEVICE FOR POWER SYSTEM, POWER SYSTEM STABILIZATION DEVICE, AND POWER FLOW MONITORING METHOD FOR POWER SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/070170
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a power flow monitoring device for a power system, a power system stabilization device, and a power flow monitoring method for a power system, which are highly reliable and accurate. The present invention is characterized by being provided with: a power system information database which stores measurement data obtained at a first node of the power system; a phase measurement value database which stores temporally synchronized phase measurement data obtained at a second node of the power system; a fault condition database which stores a power flow state under an assumed fault condition of the power system; a state estimation unit which estimates a state quantity of the power system using information in the power system information database as an input; a stability error detection index calculation unit which calculates a stability error detection index using, as an input, a state quantity estimation value which is an output of the state estimation unit, information of the state quantity from the phase measurement value database, and information in the fault condition database; and an error detection alert generation unit which compares the stability error detection index and a threshold value thereof and generates an alert when the stability error detection index exceeds the threshold value, wherein the magnitude of deviation of the state quantity estimation value with respect to the information of the state quantity from the phase measurement data is evaluated according to the assumed fault condition before the alert is generated.
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Inventors:
TSUJII YUKI (JP)
KAWAKITA KENEDWARD (JP)
KUMAGAI MASATOSHI (JP)
WATANABE MASAHIRO (JP)
KIKUCHI AKIRA (JP)
KAWAKITA KENEDWARD (JP)
KUMAGAI MASATOSHI (JP)
WATANABE MASAHIRO (JP)
KIKUCHI AKIRA (JP)
Application Number:
PCT/JP2017/032974
Publication Date:
April 19, 2018
Filing Date:
September 13, 2017
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H02J3/24
Domestic Patent References:
| WO2016104018A1 | 2016-06-30 | |||
| WO2007053965A1 | 2007-05-18 |
Foreign References:
| US20120046889A1 | 2012-02-23 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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