報告書番号

682003

タイトル（和文）

酸化亜鉛形避雷器の開閉サージ動作責務試験法の提案

タイトル（英文）

PROPOSAL ON SWITCHING SURGE OPERATING DUTY TEST METHOD OF METAL OXIDE SURGE ARRESTERS

概要 （図表や脚注は「報告書全文」に掲載しております）

ＪＥＣ－２０３および新規格案の開閉サージ動作責務試験ならびにＩＥＣ方形波試験について，２７５ｋＶ系統用の避雷器を対象に比較試験を行い，その結果，（１）ＪＥＣ－２０３送電端避雷器の処理エネルギーはＩＥＣとほぼ同等となるが，放電電流はＩＥＣより２．２倍も大きい。（２）新規格案の受電端避雷器の処理エネルギーはＪＥＣ送電端避雷器或はＩＥＣ試験に比べ，１．３倍の苛酷さとなる。（３）ＪＥＣ試験では５分間隔連続３回，ＩＥＣ試験では５０秒から６０秒間隔連続５回の動作試験が行われる。このような連続動作の累計処理エネルギーは両者ほぼ等しい。しかし，両者試験の各グループにおいて周囲温度まで，供試器を冷却しなければ，ＩＥＣ試験（合計２０回動作）は，ＪＥＣ試験より４倍の苛酷さとなる。以上より新規格案の試験法は実系統条件を合理的に模擬できるので，ＩＥＣの方形波電流試験に代り新らしい開閉サージ動作責務試験として提案し

概要 （英文）

A COMPARATIVE ON THE JEC-203 AND A REVISED DRAFT OF THE JEC-203 FOR THE SWITCHING SURGE OPERATING DUTY TEST AND THELONG DURATION CURRENT IMPULSE WITHSTAND TEST OF THE IEC WERE MADE FOR THE PRORATED ARRESTER SECTION OF 266KV RATED VOLTAGE IN 275KV SYSTEM. FROM ABOVE EXPERIMENTAL RESULTS, (1) AN ENERGY ABSORPTION OF THE SENDINGSIDE ARRESTER IN THE JEC TEST IS ALMOST THE SAME AS FOR IN THE IEC TEST. HOWEVER, THE DISCHARGE CURRENT IN THE JEC TEST IS NEARLY 2.2 TIMES AS MUCH AS IN THE IEC TEST. THEREFORE, THE JEC TEST CAN CONFIRM THE PROTECTION LEVEL OF THE ARRESTER FOR THE SWITCHING SURGES, BUT THE IEC TESTCAN NOT. (2) AN ENERGY ABSORPTION OF THE RECEIVING SIDE ( OPIN SIDE ) ARRESTER IN THE REVISED DRAFT TEST ARE 1.3 TIMES AS SEVERE AS THE SENDING SIDE ARRESTER IN THE JEC TEST OR THE IEC TEST. (3) THE JEC TEST SHALL CONSIST OF 3 OPERATIONS, WHILE THE IEC TEST 5 DISCHARGE OPERATIONS. INTERVALS BETWEEN OPERATIONS SHALL BE 5 MINUTES IN THE JEC TEST AND 50 SECONDS TO 60 SECONDS IN THE IEC TEST. THE JEC TEST IS ALMOST THE SAME AS FOR IN THE IEC TEST FROM THE POINT OF VIEW OF THE SUM TOTAL ENERGY ABSORPTION FOR ABOVE CONTINUOUS OPERATIONS. SINCE THE ABOVE MENTIONED RESULTS, THE REVISED DRAFT TEST REASONABLY SIMULATES THE FIELD CONDITIONS.CONSEQUENTLY, SWITCHING SURGE OPERATING DUTY TEST SHOULD BE RECOGNIZEDAS AN ALTERNATIVE TO THE LONG DURATION CURRENT IMPULSE WITHSTAND TEST OF THE IEC.

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