Control for Bipolar DC Microgrid and DC/DC Bidirectional Converter in Energy Access Context

Rural electrification remains a significant challenge for engineers, given its intricate relationship with multiple issues, including geographical constraints and underdeveloped infrastructural provisions. As a result, with the development of Solar Home Systems (SHS) and direct current (DC) microgrids, DC systems for energy access have emerged...

Modelling and Control of MPPT Converters for DC Microgrids

To tackle the effect of climate change while meeting the ever-growing demand of energy, a high scale of integration of renewable energy resources has been performed in the past decade. Solar Photovoltaics have played a monumental role in this process, thus contributing in the fulfillment of the energy demand. The scalability and the flexibility...

Decentralized Optimal Power Flow for Bipolar DC Grids: An algorithm for online optimization using grid measurements and droop control

The optimal power flow (OPF) problem is a classic and widely-studied topic in the field of power systems.Its purpose is to minimize the running costs of a power system by determining the optimal operating points,while respecting a set of physical constraints. While most power systems are currently controlled by a centralcoordinator, there is...

Fully Distributed Optimal Power Flow for Low Voltage DC Grids: An optimisation solution using physical measurements

Multiple solutions for solving optimal power flow (OPF) have been employed, most of them using a centralised approach. However, there is another approach where every node is responsible for the local problem in order to reach a solution: the decentralised optimal power flow (D-OPF). In this thesis, the aim was to improve the speed and...

Control of a DC Microgrid

The growth of distributed Renewable Energy share in the total electricity production as wells as technological advancements in power electronics and increase of DC loads, point towards the development of the DC microgrid (DCMG) concept as a valid model for future energy systems especially for operations and locations where the existing grid...

Experimental verification for seamless mode transitions of multiple microgrids using fuzzy-based droop controller

Continuous growth in electricity demand, increasing awareness for global warming and other en- vironmental issues have triggered attention to a new type of electricity generation-the so-called distributed generation consisting of various renewable energy sources. Despite the technological, economic and environmental benefits that the new...

A Distributive Approach of Microgrid Control based on System Frequency

The world at large is passing through a phase of energy transformation – from a traditional centralized unidirectional to a decentralized and distributed bidirectional power system, with consumers becoming prosumers. Facilitated by the technological advancements in power electronics and growing concerns over climatic changes, this transformation...

Frequency Based Cellular Microgrid Control: Demand Side Management and Supply Side Management using Grid Frequency in a Cellular Microgrid

The thesis proposes a controller that enables microgrids to have a modular structure, to be flexible in terms of linked energy consumers and resources, and to offer the possibility of prioritized demand side management, while avoiding the need of employing a dedicated communication network. For this, the control strategy applies droop control,...