The performance of the Back-to-Back converter to control the bidirectional power flow

This paper analyses the capability of the Back-to-Back (BTB) power converter to control the bidirectional power flow between two interconnected AC systems; to control the power flow a nonlinear control strategy is used. The system model is analyzed in the dq synchronous reference frame. The proposed system is studied in three different operating modes. The first case (mode 1), analyses the active power sharing; in the second case (mode 2), the capability of the BTB converter to control the bidirectional power flow is presented; and in the third case (mode 3), the bidirectional flow of active and reactive are controlled simultaneously. The system stability is explored considering several power transients using a BTB converter up to 30kVA and experimental tests are developed on micro scale prototype (10:1). © 2011 Praise Worthy Prize S.r.l. -All rights reserved.

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