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This paper presents the concept of a multi-cellular power converter, structure targeted towards use in future electricity networks. Control of such a converter is challenging because of the distributed energy storage intrinsic to concept If the energy flow through the converter is not carefully controlled poor performance and even shutdown of the converter may result. This paper details the operation of such a converter and presents on example of a control scheme which can achieve the desired performance. Validations of the converter concept mid the control principles are provided by experimental results at low voltage using a two port prototype.