Power Disequilibrium Suppression in Bipolar DC Distribution Grids By Using A Series-Parallel Power Flow Controller

The unbalanced power between positive and negative poles in a bipolar DC distribution network (DC-DN) generates an unbalanced current at the neutral line, which enlarges the power losses of the system and the voltage deviation of DC loads. An unbalanced power suppression strategy based on a series-parallel power flow controller (SP-PFC) is...

Coordination Control of Power Flow Controller and Hybrid DC Circuit Breaker in MVDC Distribution Networks

The two main challenges of medium voltage direct current (MVDC) distribution network are the flexible control of power flow (PF) and fault protection. In this paper, the power flow controller (PFC) is introduced to regulate the PF and inhibit the fault current during the DC fault. The coordination strategy of series-parallel PFC (SP-PFC) and...

Real-time Active- and Reactive Power Control in a Combined Wind- Solar PPM

Increase in wind- and solar parks complicate grid stability due to their deterministic behaviour. ENTSO-E established requirements for generators for grid connection in Europe. A requirement is to have active- and reactive power control that implements a power setpoint given by the transmission system operator. This thesis describes the design...

Decoupling Control of Multiactive Bridge Converters Using Linear Active Disturbance Rejection

Multiactive bridge (MAB) converter is a promising solution for integrating multiple renewable sources, storage, and loads for various applications. However, the MAB converter is challenging to control due to the inherent coupling between the port power flows. To that end, this article presents a decoupling control strategy based on linear...

Power Flow Decoupling Controller for Triple Active Bridge Based on Fourier Decomposition of Transformer Currents

This paper proposes a power flows decoupling controller for the triple active bridge converter. The controller is based on a full-order continuous-time model of the TAB converter derived using the generalized average modelling (GAM) technique. GAM uses the Fourier series expansion to decompose the state-space variables into two components,...

Partially Rated Power Flow Control Converter Modeling for Low Voltage DC Grids

Scalable and robust low-voltage direct current (LVdc) distribution networks require solutions, allowing flexible power flow control and reliable short-circuit protection. In this paper, the continuous full-order large-and small-signal models of a partially rated power flow control converter (PFCC) are derived utilizing the generalized...

Development of Power System Control for the DeciZebro

The development of swarm robotics strives for resilience, a key factor in this is energy supply. Without energy a robot swarm cannot operate, so a self sustaining power management system is of great importance. In this thesis, the design of the power management system control hardware and firmware for the new DeciZebro is discussed. The power...

Power Flow Control Converter for Meshed LVDC

Meshed LVDC distribution grid is considered to be more efficient and reliable than AC distribution network.<br/>This applies in particular when there is a significant portion of DC sources, storage, and loads in the grid. Its<br/>optimal operation, however, is not inherent. The power flow in distribution network can suffer from congestion<br/...

Design of a Sustainable Electric Vehicle Charging Station

Electric vehicles only become useful in reducing greenhouse gas emissions, if the electricity used to charge their batteries comes from renewable energy sources. This thesis was conducted within the electric mobility framework of the Green Village, the project put forward to test the Green Campus Concept. The objective was to design a Station...

Monte Carlo simulation techniques for optimisation of phase shifter settings