Analysis and control of tundish induction heating power supply using modular multilevel converter. Issue 14 (8th June 2018)

• Record Type: Journal Article
• Authors: Yue, Yufei; Xu, Qianming; Luo, An; Guo, Peng; He, Zhixing; Li, Yan
• Is Part Of: IET generation, transmission & distribution. Volume 12:Issue 14(2018)
• Page Start: 3452
• Page End: 3460
• Publication Date: 2018-06-08
• Subjects: induction heating -- HVDC power convertors -- voltage‐source convertors -- steel -- power control -- feedforward -- electric current control -- control system synthesis; Tundish induction heating power supply control -- Tundish induction heating power supply analysis -- modular multilevel converter -- medium‐voltage operation -- power level -- MMC‐TIHPS -- molten steel heating -- heating control -- constant temperature processes -- direct power feedforward control -- load current feedforward strategy -- transient state -- controller parameter design; Electric power production -- Periodicals; Electric power transmission -- Periodicals; Electric power distribution -- Periodicals; 621.3105
• DOI: 10.1049/iet-gtd.2017.1274
• Languages: English
• ISSNs: 1751-8687

Abstract

Abstract : Modular multilevel converters (MMCs) provide advantages to reach medium‐voltage operation increasing the power level in industrial applications. In this study, a tundish induction heating power supply based MMC (MMC‐TIHPS) is investigated for heating molten steel. The equivalent model of MMC‐TIHPS is established and the energy in horizontal and vertical directions are analysed. The heating control for molten steel consists of temperature increasing and constant temperature processes (alternatively called transient‐state and steady‐state operation). The main contribution of this study is to propose a direct power feedforward control based load current feedforward strategy for TIHPS. With this strategy, TIHPS can be controlled operating with full power to heat molten steel in transient state and guarantee the insulation effectiveness in steady state. Proper parameters of controllers are designed. Experimental results are conducted to validate the feasibility of MMC‐TIHPS and the effectiveness of the proposed control method.