報告書番号

180069

タイトル（和文）

限流しゃ断装置の基礎特性（第４報）－複合直流しゃ断方式の基礎的検討－

タイトル（英文）

BASIC PROPERTIES OF CURRENT LIMITING INTERRUPTERS (4) -BASIC CONSIDERATION ON DC HYBRID INTERRUPTING SYSTEMS-

概要 （図表や脚注は「報告書全文」に掲載しております）

交流および直流系統における事故電流を高速度に限流しゃ断する装置のうち，特に，負荷電流しゃ断部と故障電流しゃ断器，およびそれらを組合せた複合しゃ断機構の検討を行った。具体的な検討項目は：１．負荷電流のしゃ断機能：（１）コンデンサ単独転流方式（２）コンデンサ＋非線形抵抗２段転流方式２．故障電流のしゃ断機能：（１）パイプ形高速限流しゃ断部の直流４０ｋＶ高電圧しゃ断試験（２）中実形高速限流しゃ断部の直流２ｋＶユニットしゃ断試験（３）中実形高速転流しゃ断部の直流２ｋＶユニットしゃ断試験

概要 （英文）

A NEW TYPE OF HYBRID DC HIGH VOLTAGE CIRCUITBREAKER WAS STUDIED AS ONE MEASURE BOTH OF FAULT CURRENT PROTECTION FOR SEMICONDUCTORS IN AC/DC SUBSTATIONS AND LOAD CURRENT INTERRUPTION OF TRANSMISSION LINES. THE DCCB CONSISTS OF TWO INTERRUPTING COMPONENTS FOR LOAD CURRENT AND FAULT CURRENT. THE FORMER USES LIQUID SF6 AS AN ARC QUENCHING MEDIUM WITH A CR CIRCUIT IN PARALLEL FOR CURRENT COMMUTATION AND ENERGY ABSORPTION. THE LATTER HAS A CURRENT LIMITING DEVICE(CLD)OR AN IN-LINE DEVICE WITH A PARALLEL ENERGY ABSORBER.THE CLD CONSISTS OF ACURRENT-THRU ELEMENT WITH WATER-COOLING AND ARC QUENCHING SAND IN ITS SURROUNDING,WHICH COULD INTERRUPT A PROSPECTIVE CURRENT OF 7KA UNDER A VOLTAGE OF 40KV IN 19M SEC AFTER A FAULT OCCURRENCE AND IS ABLE TO INTERRUPT 16KA ALSO. THE IN-LINE DEVICE USES A WATER-COOLED CURRENT-THRU ELEMENT AND A NON-LINEAR RESISTOR OF ZNO IN PARALLEL AND HAS AN INTERRUPTING CAPABILITY OF 16KA IN SEVERAL MILLISCONDS.

報告者

キーワード