Abstract
Using generalized building blocks for the design of power electronics converters is advantageous in terms of scalability, modularity, power density, and reliability. For the control of those power electronic converters composed of Power Electronics Building Blocks (PEBBs), an easily scalable and modular control system should also be integrated. In this paper, a hierarchical control system architecture is proposed for the first time for a modular Hybrid Active Power Filter (HAPF) system in order to suppress interharmonics, which their magnitudes and frequencies change dynamically in time, produced by Induction Melting Furnace (IMF). The proposed control system architecture is successfully implemented in the field on a 2.7-MVA modular HAPF system for a steel melting facility equipped with three IMFs. The performance of the HAPF system and the proposed control architecture is verified by the intensive field tests. The overall system has been working successfully in a steel melting facility since March, 2013.
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