ウェスコ | 瞬間停電補償装置 TSP

Sag事故の事例

天安湯井所在の半導体工場
3相R、S、T 154000Vを基準にして87％の電圧降下、48mSec、瞬間電圧降下事故

麗水（ヨス）化学団地の化学工場
3相R、S、T 154000Vを基準にして98％の瞬間電圧降下事故

亀尾（クミ）地域の電子スマートフォン工場
3相R、S、T 154000Vを基準にして70％の瞬間電圧降下事故

京畿器興（ギフン）地域のディスプレイ工場
2000年瞬間電圧降下事故

Date		Voltage-Dip				Reasons
Date		Voltage	Level(%)	Time(msec)	R	Reasons
APR,2000	04.05 15:16	18,387	12%	183	3.36	Yongin↔Bundang Cogeneration Transmission Line TRIP
	04.21 19:47	12,800	8%	288	3.69	Yongin#1, 2 (re-closing circuit operation due to lightning strike on power transmission line)
	04.28 02:45	34,000	22%	84	2.86	KEPCO Singal~New Yongin Singal #1T/L re-closing circuit operation
May,2000	05.04 05:23	13,820	9%	100	1.38	Yangju~Uijeongbu 345KV Yangju#2 T/LA re-closing circuit operation (5Cycle) due to ground fault
	05.19 21:11	19,700	13%	100	1.97	Uijeongbu 345KV#1T/L Lightning Strike
	05.21 15:15	14,000	9%	500	7.00	Accident Impact on Suwon Home Appliances Business
	05.23 09:02	18,500	12%	116	2.15	East Seoul Substation DS FLASH OVER
	05.31 12:30	24,000	16%	100	2.40	Western Incheon Thermal Power Plant MAIN Transformer Failure
	05.31 13:12	24,000	16%	120	2.88	Western Incheon Thermal Power Plant MAIN Transformer Reinstallation Failure
Jun,2000	06.04 17:05	53,000	34%	217	11.50	GIS accident in Western Incheon Thermal Power Plant
	06.11 14:03	32,000	21%	250	8.00	New Siheung Substation 345KV system failure due to lightning strike
	06.29 18:51	27,800	18%	83	2.31	Uman T/L re-closing circuit operation due to lightning strike
Jul,2000	07.19 18:49	14,200	9%	136	1.93	Cheongpyeong~Yangsu 154KVT/L re-closing circuit operation due to lightning strike
Jul,2000	07.22 12:23	8,100	5%	80	0.65	Icheon T/L re-closing circuit operation due to lightning strike
Aug,2000	08.07 13:51	17,700	11%	150	2.66	Seoul T/L lightning
	08.27 04:01	24,000	16%	116	2.78	Seongnam ↔ Bundang 154KVT/L re-closing circuit operation due to lightning strike
	08.28 00:05	18,000	12%	180	3.24	Yangji 154KVT/L re-closing circuit operation due to lightning strike
	08.28 01:12	8,656	6%	133	1.15	New Young-seo 345KVT/L re-closing circuit operation due to lightning strike
	08.28 03:41	22,000	14%	132	2.90	Uljin 154KVT/L re-closing circuit operation due to lightning strike
Sep,2000	09.11 17:57	20,000	13%	250	5.00	Incheon Thermal Power~Incheon Steel Transmission Line Failure
Oct,2000	10.29 05:15	17,700	11%	150	2.66	Yangji ~ Sadang #1T/L line accident
Nov,2000	11.05 12:25	15,600	10%	67	1.05	Internal line (GIS) BUS failure in Wangsimni Substation
Nov,2000	11.17 01:30	18,000	12%	116	2.09	Eastern Seoul MAIN T/L TRIP
Dec,2000	12.14 17:39	13,600	9%	67	0.91	Dangjin Power Plant Generator #1.2.3 TRIP
	12.27 07:52	10,000	6%	68	0.68	KEPCO system failure (Anseong~Songtan)
	12.30 06:18	13,300	9%	184	2.45	Western Seoul S/S#61BUS TRIP- -(Reference) Bucheon Fairchild:87,000V

Note: 2004年初 -70%の電圧降下0.7秒発生

京畿新葛（シンガル）地域の半導体工場
2015年瞬間電圧降下事故

2005年度の発生次数	発生日時		Voltage-Sag事故の詳細				発生原因
			電圧降下の幅		電圧降下持続時間		発生原因
			(V)	(%)	mSec	Cycle(s)	分類	詳細内容
1	01/16	08:30	6,000	4	150	9		蔚珍原子力発電所の敷地内での地絡事故
2	02/16	1:19	78,000	51	66	4	galloping	大雪、吹雪によるギャロピング現象（韓国電力）：韓国電力送電線路の再閉路（Re-Closer）動作 ►345kVT / L：東ソウルNO 1,2 新水源NO 1,2 ►345kVT / L：新龍仁NO 1,2 新城南（新城南〜連谷）NO 1,2
3		01:30	108,000	70	66	4
4		01:39	38,000	25	83	5
5		01:43	114,000	74	100	6
6		01:57	79,000	51	66	4
7		02:34	76,000	49	83	5
8		02:51	16,000	10	66	4
9		03:01	20,000	13	66	4
10		03:34	22,000	14	66	4
11		05:26	97,000	63	66	4

米国半導体工場グループ調査
瞬間電圧降下事故とSEMI F47 Standard
Sagの大きさが50％以下、Sagの持続時間が3Cycles（50msec）以下で発生頻度が最も高いことがわかる。
• Task Force that created SEMI F47 Studied 16 Plants, 14 in US
• 30.5 Monitor years
• Total events = 1064
• Average number of Events below SEMI F47 per site per year is 3.1