Full‐selective contribution of sources in DC nanogrids using a technique based on buck/boost converter

Abstract

In addition to conventional methods such as load side management and source side management, recently some new techniques have been presented to manage local sources in power networks. However, realising full-selective contribution of the load side sources has not addressed in the literature, yet. In this study, an efficient full-selective method is proposed, aimed to achieve a different desirable contribution of the sources in DC nanogrids. The proposed technique is based on a novel idea of DC power hub, which includes several buck/boost converters to control the contribution of local sources for supplying each of nanogrid's loads. The effectiveness of the proposed approach is confirmed using some simulations under different operating conditions.

Continuous operation of LVDC source/load under DC faults in MMC-DC distribution systems

“…By turning on Sstorage, the equivalent capacitance changes from Cdc1 to (Cdc1+Cstorage), which helps to reduce the variation of Udc1. In this case, (1), ( 2) and (3) change into (4). By setting ε to be the acceptable limit (±10%), and considering the maximum energy of ∫(Pin_1-Pout_1)•dt, the required Cstorage can be obtained.…”

Review of Control Strategies for DC Nano-Grid

“…In this way, the decentralized controllers will adjust the connected unit according to the state of the decentralized controllers adjacent. Another option is to use a non-zero input offset in one of the local controllers (Samet et al, 2019). In both cases, the latter has wide applicability.…”

Realising full‐selective sources contribution in AC nano‐grids

“…Since the required communication infrastructures are available in NGs, it can be implemented in such grid, straightforwardly. Although, recently the idea of full-selective contribution of sources in DC NGs is proposed by Samet et al [53], the proposed approach and the utilised tools are different here. The difference is due to the inherent difference between AC and DC NGs.…”