Price-Based DC Bus Signaling for Nanogrids Power Management

Abstract

Nanogrids are small electrical installations used to manage loads and distributed energy resources (DERs), locally. Commonly, hierarchical control strategies and conventional state machines are used for power-sharing and nanogrid management. However, these strategies are complex and no very flexible. In this paper, a dc bus signaling (DBS) strategy is used to relate an internal price concept to power management. This allows managing the nanogrid according to an economic market idea. This simplifies the state machine's design because is defined for the power elements, operation modes to sell or buy energy - in response to the price. This control strategy is called Price-Based Power Management (PBPM) and uses the DBS to define when energy lacks, or surplus occurs in the nanogrid. To corroborate this proposal, the PBPM algorithm is implemented in a Texas Instruments DPS F28379S, and Typhoon-HIL 602+ is used to carry out the real-time domain emulation results.