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114
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Introduction
Gilney Damm is Senior Research Scientist at University Gustave Eiffel, at the Laboratoire COSYS-IMSE Laboratory. Previously he was Associate Professor at the Paris-Saclay University, France, in the Laboratoire des Signaux et Systèmes – L2S at CentraleSupelec.
He received his Habilitation à Diriger des Recherches in 2010 and Ph.D. in 2001 at Paris-Saclay University; His research interests are in nonlinear control for power systems (SmartGrids, SuperGrid, MicroGrids).
Additional affiliations
September 2002 - December 2020
Publications
Publications (114)
The robust transient stabilisation problem (with stability proof) of a synchronous generator in an uncertain power network with transfer conductances is rigorously formulated and solved. The generator angular speed and electrical power are required to be kept close, when mechanical and electrical perturbations occur, to the synchronous speed and m...
In this article, the problem of robust state observer design for a class of unmanned aerial vehicles (UAVs) is addressed. A prototype four-rotors helicopter robot for indoors and outdoors applications is considered: the drone is not equipped with GPS related devices, so we describe a strategy to estimate its translational velocity vector based on a...
This work presents a nonlinear adaptive output feedback excitation control, designed for a synchronous generator modelled by a standard third-order model on the basis of the physically available measurements of relative angular speed, active and reactive electric power and terminal voltage. The power angle, which is a crucial variable for the excit...
This paper presents the design, model, and control of a Dynamic Wireless Power Transfer System (DWPT) for a 30 kW electric vehicle charger application. This system allows electric vehicles to receive electric power while running along a road, preserving or even charging its internal battery. The system features primary coils embedded along the road...
This paper proposes a combined adaptive virtual Inertia and adaptive damping control of a virtual synchronous generator (AID-VSG) to improve the dynamic frequency response of microgrids. In the proposed control scheme, the VSG’s virtual inertia and damping coefficients adapt themselves during the transients to, respectively, reduce frequency deviat...
The development of the modular multilevel converter (MMC) enabled the efficient creation of high-power high-voltage direct current (HVdc) transmission systems. As a result, MMC-HVdc transmission systems became the main alternative to integrate remote renewable energy sources being deployed in accelerating rates to fight climate change. As the numbe...
This article proposes an adaptive virtual inertia control system for stable operation of microgrids: it theoretically improves recent related results in the literature. The overall control system is conceived to provide ancillary services support (namely, enhanced frequency regulation with inertial response and voltage support) to an ac/dc microgri...
With the growing pressure to substitute fossil fuel-based generation, Renewable Energy Sources (RES) have become one of the main solutions from the power sector in the fight against climate change. Offshore wind farms, for example, are an interesting alternative to increase renewable power production, but they represent a challenge when being inter...
DC microgrids have shown to be a good approach for better accommodating stochastic renewable energy sources (RES) and for the charging of electric vehicles (EVs) at the distribution level. For this, fast-acting energy storage units (ESSs) are essential. This requires that both the bi-directional power converter topology and the control scheme prese...
The main objective of this research is to carry out a probabilistic short circuit analysis, using the Monte Carlo Method (MCM), applied to Voltage Source Converter (VSC)- High Voltage Direct Current (HVDC) systems. The definition of stochastic parameters and a method to ensure statistical significance of the phenomenon under analysis are addressed....
This paper presents a solution for real-time charging of electric vehicles along the road while moving. This is called the Dynamic Wireless Inductive Charging System (DWICS) and can mitigate the cost of the charging infrastructure, the size/weight/cost of batteries, and hence improve the cost and range of electric vehicles. This solution has the ad...
The present paper describes an Electric Vehicle (EV) charging station that provides ancillary services to the main AC grid, as for example frequency support and synthetic inertia. Due to the Direct Current (DC) nature of these loads and the easier integration of renewable energies, a DC Microgrid is considered to power the charging station. Targeti...
Due to limitations on energy storage capacity and charging problems, Electric vehicles (EVs) have not received full acceptance by customers. Dynamic Wireless Power Transfer (DWPT) has been widely studied as a promising disruptive technology, that could solve some of these issues. Indeed, it represents an attractive alternative, bringing safety and...
This chapter is dedicated to DC Microgrid’s application to provide ancillary services to weak AC grids. In particular, control algorithms are designed to provide inertial, frequency and voltage support for weak grids, such as AC Microgrids composed mainly by sources interfaced by power converters, with a small portion of diesel generators. A number...
In this work is considered the connection of a photovoltaics (PV) solar plant to the main grid through a Direct Current (DC) MicroGrid and a hybrid storage system, composed of a battery and a supercapacitor, in order to satisfy constraints of grid connection (the so-called Grid-Codes). The objective, and main contribution of this paper, is to stabi...
This chapter is dedicated to DC Microgrid's application to provide ancillary services to weak AC grids. In particular, control algorithms are designed to provide inertial, frequency and voltage support for weak grids, such as AC Microgrids composed mainly by sources interfaced by power converters, with a small portion of diesel generators. A number...
The power system is going through a change in its very foundations. More and more power converters are being integrated into the electric grid to interface renewable energy resources and in high-voltage direct-current (HVDC) transmission systems. This article presents a discussion on the stability of power systems when HVDC transmission systems bas...
DC grid interfaces for supercapacitors (SCs) are expected to operate with a wide range of input voltages with fast dynamics. The class-C DC-DC converter is commonly used in this application because of its simplicity. However, it does not work if the output voltage (V2) becomes smaller than the input voltage (V1). The non-isolated bi-directional Buc...
This paper presents the nonlinear control design with formal stability proof for a Modular Multilevel Converter (MMC), which is critical for the interaction between AC and DC grids. Lyapunov theory is used to develop the proposed controller, which is based on Backstepping and Feedback Linearization techniques and to perform the stability analysis....
The transient stabilization and voltage regulation problem for a synchronous generator connected to an infinite bus is addressed, in this technical note, in the presence of all uncertain physical parameters. First, new interpretations for the Desensitized Four Loops Regulator, here referred to as robust coordinated PSS-AVR (Power System Stabilizer...
This paper presents a distributed supplementary control for embedded Multi-Terminal VSC-HVDC (MTDC) grids to enhance transient stability of the surrounding AC grid. Firstly, the need of supplementary controllers for embedded MTDC grids is demonstrated via the study of the Transient Energy Functions (TEF) of a simple hybrid AC/DC power system. Then,...
The reinforcement of the transmission systems by means of HVDC systems, appears to be one of the most suitable solutions to face the challenges related to the evolution of power systems. In this context, this paper aims to investigate the impact of the overlaid HVDC systems on stability of the surrounding AC grid. More in particular, the rotor-angl...
This paper investigates the impact of embedded Voltage Source Converter-based High Voltage Direct Current (VSCHVDC) links on AC grids transient stability. Firstly, using Transient Energy Functions (TEF), it is demonstrated that VSC-HVDC links controlled to track constant power references, do not inherently improve transient stability of the surroun...
The paper proposes an adaptive variable synthetic inertia strategy to provide frequency and voltage support (ancillary services) in an AC MicroGrid (weak grid) composed of diesel generators and loads. A DC MicroGrid is connected to the AC one by a Voltage Source Converter (VSC). The VSC converter is driven as a Virtual Synchronous Machine (VSM), wh...
The paper introduces a combined modeling that can allow the Optimal Power Flow of a Multi-Energy Vector merging electric and thermal networks. This topic is motivated by the goal of introducing larger shares of renewable energy in the overall energy consumption, which is hindered by the intermittent nature of these renewable energies. To tackle thi...
This paper is a contribution for DC MicroGrid control and introduces a rigorous dynamics’ analysis, taking into account intermittency effects. We propose an hierarchical control scheme, based on nonlinear control theory, in particular Lyapunov, backstepping and input/output feedback linearization. The resulting algorithms are simple, comparable to...
A low-level distributed nonlinear controller for a DC MicroGrid integrated in a Smart Railway Station capable to recover trains' braking energy is introduced in this paper. The DC MicroGrid is composed by a number of elements: two different types of renewable energy sources (regenerative braking energy recovery from the trains and photovoltaic pane...
A power management controller for a DC MicroGrid containing renewable energy sources, storage elements and loads is presented. The controller ensures power balance and grid stability even when some devices are not controllable in terms of their power output, and environmental conditions and load vary in time. Power balance and desired voltage level...
This chapter introduces concepts of DC MicroGrids exposing their elements, features, modeling, control, and applications. Renewable energy sources, energy storage systems, and loads are the basic components of a DC MicroGrid. These components can be better integrated, thanks to their DC feature, resulting in simpler power converter topologies, as w...
This paper introduces a control induced time-scale separation scheme for a multiterminal high-voltage direct current system used for large scale integration of renewable energy sources. The main idea is to provide a detailed theoretical analysis to the long stand practice that consists of the empirical design of two control loops for the terminals....
This paper proposes the integration of a train line for regenerative braking into a DC MicroGrid composed of PV generation, hybrid energy storage system (battery and supercapacitor) and DC local load. The energy generated from regenerative braking is absorbed by the supercapacitor, which is able to deal with bursts of power without affecting the st...
A nonlinear control able to perform voltage and power stability in Direct Current (DC) MicroGrids for an efficient renewable energy integration that is capable of providing frequency support to an Alternate Current (AC) grid is introduced in this work. A generic DC MicroGrid modeling is developed, and the introduced controllers are shown to ensure...
In recent years different protection strategies for High Voltage Direct Current (HVDC) grids have been developed by the
industry and academia for the reliable and safe operation of
direct current grids. The proposed strategies have different impacts on the AC networks where HVDC grids are connected.
In the case of embedded HVDC grids embedded in a...
International audience
The access to electricity for isolated communities is capital for improving life in those societies. The use of renewable energy sources (renewables) and energy storage systems is the key for clean energy supply in remote areas without the main grid. The standalone operation of renew-ables represents a challenge for operation...
This paper introduces a control induced time-scale separation scheme for a multi-terminal high-voltage direct current system used for large scale integration of renewable energy sources. The main idea is to provide a detailed theoretical analysis to the long stand practice that consists of the empirical design of two control loops for the terminals...
This article provides a solution for the control of multi-terminal DC networks from the point of view of the network's transmission system operator (TSO), which includes local, primary, and secondary controllers. A new power flow technique is validated for this approach, which guarantees the stability and requires fewer calculations than convention...
This paper presents the nonlinear control of a Fully-Fed Synchronous Machine based Variable Speed Pumped Storage Plant (FFSM PSP). First, a model is developed and the control objective is established followed by the control design. The control algorithm is designed using Feedback Linearization robustified by a Second Order Sliding Mode Control (SOS...
DC MicroGrids present an increasing interest as they represent an advantageous solution for interconnecting renewable energy sources, storage systems and loads as electric vehicles. A high-level management system able to calculate the optimal reference values for the local controllers of each of the DC MicroGrid interconnected devices is introduced...
New connection constraints for the power network (Grid Codes) require more flexible and reliable systems, with robust solutions to cope with uncertainties and intermittence from renewable energy sources (renewables), such as photovoltaic arrays. The interconnection of such renewables with storage systems through a Direct Current (DC) MicroGrid can...
New connection constraints for the power network (Grid Codes) require more flexible and reliable systems, with robust solutions to cope with uncertainties and intermittence from renewable energy sources (renewables), such as photovoltaic arrays. A solution for interconnecting such renewables to the main grid is to use storage systems and a Direct C...
New connection constraints for the power network (Grid Codes) require more flexible and reliable systems, with robust solutions to cope with uncertainties and intermittence from renewable energy sources (renewables), such as photovoltaic arrays. The interconnection of such renewables with storage systems through a Direct Current (DC) MicroGrid can...
New connection constraints for the power network (Grid Codes) require more flexible and reliable systems, with robust solutions to cope with uncertainties and intermittence from renewable energy sources (renewables), such as photovoltaic arrays. A solution for interconnecting such renewables to the main grid is to use storage systems and a Direct C...
A new power flow for DC grids is presented in this paper. This new method gives the possibility of using more than one bus for the power balance and consequently share the responsibilities between many actors. The present paper introduces a mathematical proof for this new power flow algorithm, which guarantees the existence of unique solution when...
This paper focuses on the experimental implementation of local and primary controls for MT-HVDC in a real test bench (P nom = 6 kW). A local control with two different time scales, one for the current and the other for the voltage, and primary control (droop control), which is responsible to vary the reference voltage when a disturbance appears in...
A Multiple Input Multiple Output (MIMO) controller based on the conditional integrator technique is designed for the robust stabilization of a new satellite launching strategy called (unmanned) airlaunch. This strategy consists in using a two-stages launching system. The first stage is composed of an airplane (manned or unmanned) that carries a roc...
This work presents a power flow strategy for multi-terminal HVDC grids. Energy is mainly generated via renewable energy sources and there are nodes in the network with the possibility to store energy. This energy is generated taking into account real weather conditions in order to make the best scheduling of the system in a realistic approach. An o...
This paper addresses the problem of analyzing the dynamic limitations of a VSC terminal with DC voltage droop control. Thanks to its fast response, DC voltage droop control is usually used to adjust the DC voltage in case of power imbalance. To ensure the stability of the VSC terminal, the dynamics between the dq currents (il,dq) and the DC voltage...
This paper presents the modeling and control of a DC/DC bidirectional converter suitable for medium voltage and power applications in Multi-Terminals HVDC (MT-HVDC) grids. Moreover its use as DC circuit-breaker is described. This is a new concept, against the contemporary studies of DC breakers,which could help for the implementation of MT-HVDC net...
This paper presents the modeling and control of a multilevel DC/DC bidirectional converter suitable for medium voltage and medium power applications, with a special interest in renewable applications. The multilevel converter is based on Dual Active Bridge (DAB) and its average dynamic model. Two different control strategies are addressed in this p...
This paper proposes a novel control scheme to regulate the DC voltage of a VSC terminal. It significantly simplifies the control design process itself and also results in an uncomplicated and efficient control architecture. First, we present an equivalent state-space model established in a synchronous dq reference frame. Subsequently, we split the...