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Patent Searching and Data


Title:
POWER SYSTEM AND RELAY
Document Type and Number:
WIPO Patent Application WO/2019/097580
Kind Code:
A1
Abstract:
This power system comprises: a power conditioner; and a relay that detects the occurrence of an accident with a transmission line on the basis of whether current limiting control of the power conditioner is being executed. The power conditioner has an inverter circuit that converts direct-current power from a direct-current power supply into alternating-current power and then supplies the alternating-current power to the transmission line, and a control circuit that is configured to be capable of executing current limiting control, which inhibits or stops output current of the inverter circuit when the voltage on the output side of the inverter circuit matches a predetermined condition. The power system may include a rotary generator that supplies power to the transmission line. The relay may be a distance relay that detects an accident with the transmission line on the basis of whether the impedance of the transmission line matches a prescribed impedance condition determined in advance. The distance relay may detect that an accident with the transmission line has occurred when there has been a match of the impedance with the prescribed impedance condition, or when there has been execution of the current limiting control.

Inventors:
NAGASAKI, Hiromi (3-1-1 Kyobashi, Chuo-k, Tokyo 31, 〒1040031, JP)
IIJIMA, Yukihisa (3-1-1 Kyobashi, Chuo-k, Tokyo 31, 〒1040031, JP)
UMENO, Chieko (3-1-1 Kyobashi, Chuo-k, Tokyo 31, 〒1040031, JP)
Application Number:
JP2017/040948
Publication Date:
May 23, 2019
Filing Date:
November 14, 2017
Export Citation:
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Assignee:
TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION (3-1-1, Kyobashi Chuo-k, Tokyo 31, 〒1040031, JP)
International Classes:
H02H3/16; H02H3/40; H02H7/26; H02J3/38
Foreign References:
JP2015165729A2015-09-17
JP2015065719A2015-04-09
Attorney, Agent or Firm:
TAKADA, Mamoru et al. (Takada, Takahashi & Partners Konwa Bldg. 7F, 12-22 Tsukiji 1-chome, Chuo-k, Tokyo 45, 〒1040045, JP)
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