SYSTEM INTERCONNECTION POWER UNIT
PROBLEM TO BE SOLVED: To prevent a short circuit current from flowing in an electric power system from a system interconnection power unit when short circuit is generated in the system. SOLUTION: A DC power source 2, an electric converter 3 converting DC power from the DC power source 2 to AC power,...
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creator | KIKUOKA YASUHEI SAKASHITA SHIYUUJI TOKUDA NOBUYUKI OKUDA KOJI |
description | PROBLEM TO BE SOLVED: To prevent a short circuit current from flowing in an electric power system from a system interconnection power unit when short circuit is generated in the system. SOLUTION: A DC power source 2, an electric converter 3 converting DC power from the DC power source 2 to AC power, and a system interconnection protective device 4 which detects abnormality of an electric power system 6 connected with the electric converter and generates a signal for cutting off the output of the converter, are installed. The protective device 4 consists of a system abnormality detecting relay 4a which has a previously set specific operation time limit and operates, and a high speed short circuit detecting relay 4b which detects at a high speed a short circuit accident of the connected electric power system and operates. A high speed cutting off means is installed which breaks the output of the converter 3 at a high speed when the relay 4b operates. |
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SOLUTION: A DC power source 2, an electric converter 3 converting DC power from the DC power source 2 to AC power, and a system interconnection protective device 4 which detects abnormality of an electric power system 6 connected with the electric converter and generates a signal for cutting off the output of the converter, are installed. The protective device 4 consists of a system abnormality detecting relay 4a which has a previously set specific operation time limit and operates, and a high speed short circuit detecting relay 4b which detects at a high speed a short circuit accident of the connected electric power system and operates. 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SOLUTION: A DC power source 2, an electric converter 3 converting DC power from the DC power source 2 to AC power, and a system interconnection protective device 4 which detects abnormality of an electric power system 6 connected with the electric converter and generates a signal for cutting off the output of the converter, are installed. The protective device 4 consists of a system abnormality detecting relay 4a which has a previously set specific operation time limit and operates, and a high speed short circuit detecting relay 4b which detects at a high speed a short circuit accident of the connected electric power system and operates. A high speed cutting off means is installed which breaks the output of the converter 3 at a high speed when the relay 4b operates.</description><subject>CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER</subject><subject>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER</subject><subject>ELECTRICITY</subject><subject>GENERATION</subject><subject>SYSTEMS FOR STORING ELECTRIC ENERGY</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2000</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZFAMjgwOcfVV8PQLcQ1y9vfzc3UO8fT3UwjwD3cNUgj18wzhYWBNS8wpTuWF0twMSm6uIc4euqkF-fGpxQWJyal5qSXxXgFGBgYGhhYmZgaGjsZEKQIAgwci7A</recordid><startdate>20000630</startdate><enddate>20000630</enddate><creator>KIKUOKA YASUHEI</creator><creator>SAKASHITA SHIYUUJI</creator><creator>TOKUDA NOBUYUKI</creator><creator>OKUDA KOJI</creator><scope>EVB</scope></search><sort><creationdate>20000630</creationdate><title>SYSTEM INTERCONNECTION POWER UNIT</title><author>KIKUOKA YASUHEI ; SAKASHITA SHIYUUJI ; TOKUDA NOBUYUKI ; OKUDA KOJI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JP2000184601A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2000</creationdate><topic>CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER</topic><topic>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER</topic><topic>ELECTRICITY</topic><topic>GENERATION</topic><topic>SYSTEMS FOR STORING ELECTRIC ENERGY</topic><toplevel>online_resources</toplevel><creatorcontrib>KIKUOKA YASUHEI</creatorcontrib><creatorcontrib>SAKASHITA SHIYUUJI</creatorcontrib><creatorcontrib>TOKUDA NOBUYUKI</creatorcontrib><creatorcontrib>OKUDA KOJI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>KIKUOKA YASUHEI</au><au>SAKASHITA SHIYUUJI</au><au>TOKUDA NOBUYUKI</au><au>OKUDA KOJI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>SYSTEM INTERCONNECTION POWER UNIT</title><date>2000-06-30</date><risdate>2000</risdate><abstract>PROBLEM TO BE SOLVED: To prevent a short circuit current from flowing in an electric power system from a system interconnection power unit when short circuit is generated in the system. SOLUTION: A DC power source 2, an electric converter 3 converting DC power from the DC power source 2 to AC power, and a system interconnection protective device 4 which detects abnormality of an electric power system 6 connected with the electric converter and generates a signal for cutting off the output of the converter, are installed. The protective device 4 consists of a system abnormality detecting relay 4a which has a previously set specific operation time limit and operates, and a high speed short circuit detecting relay 4b which detects at a high speed a short circuit accident of the connected electric power system and operates. A high speed cutting off means is installed which breaks the output of the converter 3 at a high speed when the relay 4b operates.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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subjects | CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION SYSTEMS FOR STORING ELECTRIC ENERGY |
title | SYSTEM INTERCONNECTION POWER UNIT |
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