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Semiconductor Factory located in Cheonan Tangjeong
87% voltage drop based on 3-phase R,S,T 154000V, 48mSec. Instantaneous voltage drop accident
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Chemical Factory in Yeosu Chemical Complex
98% instantaneous voltage drop accident based on 3-phase R,S,T 154000V
- Electronic Smartphone Factory in Gumi
70% instantaneous voltage drop accident based on 3-phase R,S,T 154000V
- Display Factory in Giheung, Gyeonggido
Instantaneous Voltage Drop Accident in 2000
| Date | Voltage-Dip | Reasons | ||||
|---|---|---|---|---|---|---|
| Voltage | Level(%) | Time(msec) | R | |||
| 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 |
| 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 |
| 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: in early 2004 - 70% voltage drop occurred for 0.7 seconds | ||||||
- Semiconductor factory in Singal, Gyeonggi-do
2015 instantaneous voltage drop accident
| 2005 occurrence order | date and time of occurrence | voltage-sag accident details | cause of occurrence | ||||||
|---|---|---|---|---|---|---|---|---|---|
| degree of voltage drop | voltage drop duration | ||||||||
| (V) | (%) | mSec | Cycle(s) | classification | details | ||||
| 1 | 01/16 | 08:30 | 6,000 | 4 | 150 | 9 | ground fault accident in Uljin nuclear power plant | ||
| 2 | 02/16 | 1:19 | 78,000 | 51 | 66 | 4 | galloping | Galloping phenomenon caused by heavy snowstorm (KEPCO) : KEPCO transmission line re-closer operation ‣345kV T/L: Dong Seoul NO 1,2 New Suwon NO 1,2 ‣345kV T/L: New Yongin No. 1,2 Shinyeon (New Sungnam~Yeongok) 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 | ||||
- US Semiconductor Factory Group Survey
Instantaneous voltage drop accident and SEMI F47 Standard
You can see the occurrence frequency of Sag is the highest when the size of Sag is less than 50% and the duration of Sag is less than 3Cycles (50msec).
• 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
