{"title":"Real-Time Measurement Approach for Tracking the \u0394V10 Estimate Value of DC EAF ","authors":"Jin-Lung Guan, Jyh-Cherng Gu, Chun-Wei Huang, Hsin-Hung Chang","volume":91,"journal":"International Journal of Electrical and Computer Engineering","pagesStart":1162,"pagesEnd":1167,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/9998995","abstract":"
This investigation develops a revisable method for estimating the estimate value of equivalent 10 Hz voltage flicker (DV10<\/sub>) of a DC Electric Arc Furnace (EAF). This study also discusses three 161kV DC EAFs by field measurement, with those results indicating that the estimated DV10<\/sub> value is significantly smaller than the survey value. The key point is that the conventional means of estimating DV10<\/sub> is inappropriate. There is a main cause as the assumed Qmax<\/sub> is too small.<\/p>\r\n\r\n Although DC EAF is regularly operated in a constant MVA mode, the reactive power variation in the Main Transformer (MT) is more significant than that in the Furnace Transformer (FT). A substantial difference exists between estimated maximum reactive power fluctuation (DQmax<\/sub>) and the survey value from actual DC EAF operations. However, this study proposes a revisable method that can obtain a more accurate DV10<\/sub> estimate than the conventional method.<\/p>\r\n","references":"[1]\tGu, J.C., Wu, C.J., and Chiang, J.C.: \u2018Effects of High Voltage Side Voltage Flicker Sources on Low Voltage Side Customers\u2019. Research Report, Power Research Institute, Taiwan Power Company, 1994\r\n[2]\tWu, C.J., and Lee, L.H.: \u2018Electric Power Quality Evaluation of 161kV Large Size Steel Plants\u2019. Research Report, Power Research Institute, Taiwan Power Company, 1995\r\n[3]\tManchur, G., and Erven, C.C.: \u2018Development of A Model for Estimating Flicker from Electric Arc Furnaces\u2019, IEEE Trans. on Power Delivery, 1992, 7 (1), pp. 416-426\r\n[4]\t\u2018New trend in supply problems of arc furnace for steel plants\u2019. Technology Report, Electrical Engineering Society, Japanese, 1978, 2 (72)\r\n[5]\tMendis, S.R., Do, A.V., and Boyd, D.M.: \u2018Investigation of Transmission System Voltage Flicker due to Multiple AC and DC Furnace Operations\u2019. IEEE Trans. on Power Delivery, 1995, 10 (1), pp.483-496\r\n[6]\tChiang, J.C.: \u2018Electric Power Quality Actual Illustration\u2019 (Chwa Book Co., Taiwan, 2000 1st edn.)\r\n[7]\t\u2018The Survey of DC Arc Furnace\u2019. Technology Report, Nihon Kou-Kan Co., Japanese, 1989\r\n[8]\tWu, C.J.: \u2018Measurement and Analysis of Voltage Flicker\u2019. Research Report, Power Research Institute, Energy Commission, Ministry of Economic Affairs, Taiwan, 2000.\r\n[9]\tJ. L. Guan, J. C. Gu, and C. J. Wu, \"A Novel Method for Estimating Voltage Flicker,\" IEEE Trans. on Power Delivery, vol. 20, no. 1, pp. 242-247, Jan. 2005.\r\n[10]\tJ. L. Guan, J. C. Gu, and C. J. Wu, \" Real-time Measurement Approach for Tracking the Actual Coefficient of \/ of Electric Arc Furnaces,\" IEEE Trans. on Power Delivery, vol. 19, no. 1, pp. 309-315, Jan. 2004.\r\n","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 91, 2014"}