POWER CONTROL SYSTEM - MITSUBISHI ELECTRIC CORP

Title:

POWER CONTROL SYSTEM

Document Type and Number:

WIPO Patent Application WO/2020/110236

Kind Code:

A1

Abstract:

In this power control system, a self-excited power converter (2) includes first and second arms each having one or more switching elements and performs power conversion between a DC system (14) and an AC system (80). An AC breaker (12) and a current control circuit (30) are connected in series on the path between the AC system (80) and the power converter (2). The current control circuit (30) includes a current-limiting resistor (31) and a disconnector (32) which are connected with each other in parallel. A control device (50) instructs the disconnector (32) to be on after the initial charging of the power converter (2) and opens the AC breaker (12) when the line impedance between a first node positioned on one side of the current control circuit (30) and a second node positioned on the other side of the current control circuit (30) is greater than or equal to a first threshold value and the accumulated value of the current flowing through the current control circuit (30) within a certain time is greater than or equal to a second threshold value.

Inventors:

IMADA NORIYUKI (JP)
HARIO MASAHIRO (JP)

Application Number:

PCT/JP2018/043822

Publication Date:

June 04, 2020

Filing Date:

November 28, 2018

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)

International Classes:

H02H7/12; H02H3/08; H02H3/40; H02J3/36; H02M7/25; H02M7/49

Foreign References:

JP2018007295A	2018-01-11
JPS6359205B2	1988-11-18
JP2014030289A	2014-02-13
JP2011509068A	2011-03-17
JP2008538892A	2008-11-06
JPH0549108A	1993-02-26
JP2018007295A	2018-01-11

Other References: