# Jonathan Mayo-MaldonadoThe University of Sheffield | Sheffield · Department of Electronic and Electrical Engineering

Jonathan Mayo-Maldonado

Ph.D. in Electrical and Electronic Engineering

## About

120

Publications

43,662

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1,037

Citations

Introduction

Additional affiliations

August 2021 - present

July 2016 - present

Education

October 2011 - July 2015

August 2008 - October 2010

August 2003 - May 2008

## Publications

Publications (120)

The authors develop a dissipativity theory for switched systems whose dynamical modes are described by systems of higher order linear differential equations. They give necessary and sufficient conditions for dissipativity based on systems of linear matrix inequalities (LMIs), constructed from the coefficient matrices of the differential equations d...

In this paper, we review relevant problems in the modeling of dc-dc converters with switched capacitors. We study several approaches that overcome the exposed modeling difficulties, addressing ideal and nonideal cases and using dynamic equations that are valid in a large-signal domain.

This letter proposes a boost dc-dc converter topology with the novel capability of canceling the input current ripple at an arbitrarily preselected duty cycle. This is accomplished without increasing the count of the number of components in contrast to other solutions available in the literature. In addition, the converter features a high voltage g...

We study the stability of switched systems where the dynamic modes are
described by systems of higher-order linear differential equations not
necessarily sharing the same state space. Concatenability of trajectories at
the switching instants is specified by gluing conditions, i.e. algebraic
conditions on the trajectories and their derivatives at th...

This study proposes several dynamic models for a DC-DC multilevel boost converter. A full-order non-linear dynamic model, a reduced-order non-linear model and a small-signal model are derived. These models are based on the equivalent circuits that depend on the switching states of the converter. In addition, an input-output feedback linearisation c...

The increasing interest in renewable energy sources has brought attention to large voltage-gain dc–dc converters; among the different available solutions to perform a large voltage-gain conversion, this article presents an overview of non-isolated dc–dc converter topologies that utilize switched-capacitor circuits, i.e., diode-capacitors voltage mu...

This article describes (and demonstrates through experiments) the feasible implementation of a power conversion system designed for a Fuel Cell (FC) application in renewable energy generation. The system is designed to be powered by an FC stack, which output is a low (in amplitude) non-regulated dc voltage, with a relatively wide range of variation...

This paper addresses a fundamental issue in power converter control. Namely, the direct output-voltage control of power converters with higher-order dynamics. We argue that despite of the burst in the development of new topologies, legacy control design principles-inherited from second-order converter analysis-have been unduly adopted as de facto r...

This chapter addresses the technical aspects of electricity in the whole overview of energy sustainability treated in this book. Whereas in other chapters the reader can find general aspects regarding market dynamics, energy harvesting, alternative sources of energy and policy aspects; here the Authors concentrate on discussing the new technologica...

We introduce a fully informative distribution network phasor measurement unit (FI-DPMU), that is capable of performing a simultaneous estimation of phasor dynamics and harmonic components. This is in contrast with current state-of-the-art devices, that only provide information about the fundamental component of voltages/currents—by discriminating o...

In this paper, a solution to mitigate the leakage-ground currents in a grid-tied H-bridge neutral-point clamped inverter is presented. This solution consists in splitting the LC filter capacitor and connecting each capacitor to a DC-link terminal. The proposal is referred to as the DC-link-tied LC output filter. Out of this hardware modification, i...

This paper presents a control method to balance, in average, the DC-link capacitor voltages while injecting power to the grid using an h-bridge neutral-point clamped five-level inverter grid-tied through an LCL filter. The method exploits the structure of a particular model representation of the system comprising a differential-mode part and a comm...

This paper introduces a new single switch DC-DC fourth-order boost converter. The proposed converter is the improved version of an existing converter known as the super-boost converter. The improved super-boost ISP converter achieves a smaller input current ripple than the super-boost converter when the same parameters in passive components are use...

This work proposes a data-driven approach to controlling the alternating current (AC) voltage via a static synchronous compensator (STATCOM). This device offers a fast dynamic response injecting reactive power to compensate the voltage profile, not only during load variations but also depending on the operating point established by the grid. The pr...

The low energy storage quadratic boost converter (LES-QBC) was recently proposed as an advantageous topology in terms of reduced output voltage ripple and fast dynamic response, besides high power density and reduced energy storage. The topological configuration can be exploited mainly through a 180 phase shift between the controlled switch gate si...

Distribution networks are currently the main focus of modernization in electric power systems. For instance, to deal with emerging and increasingly challenging scenarios (e.g., high penetration of renewables, distributed generation, electric vehicle proliferation, etc.), new smart grid technologies are being deployed over distribution networks. Thi...

This work introduces the development of a power-electronics customizable energy system for their application on renewable energy generation based on proton-exchange membrane fuel cells. The customizable energy system aims to regulate the output voltage from a fuel cell, which has a relatively low amplitude and wide range of variation, to a fixed vo...

This paper studies the double-dual DC-DC buck converter composed by two buck power stages in a double dual connection. This connection has been previously studied with the boost power stage in the well-known double dual boost converter. In contrast to the double dual boost, which can only be used as a dc-dc converter, the double dual buck can be us...

Phase-locked loop (PLL) systems play a crucial role in grid synchronization. Since variations on the grid voltage parameters are in general uncertain, the dynamics of PLLs are by nature nonlinear. This fact imposes a relevant challenge to guarantee their stability. Unfortunately, as argued in this paper, there is a remarkable lack of global stabili...

This paper contains a new passivity-based control design approach for DC microgrids. The design is purely based on experimental data-bypassing the requirement of the network modeling. This approach permits the control of DC microgrids and preserve stability, despite of further interconnection of new passive loads and new passivity-based-controlled...

This paper presents a novel frequency-locked-loop (FLL) scheme that provides estimates of the in-phase and square-phase fundamental components of a distorted single-phase reference signal and an estimate of its fundamental angular frequency. The main feature of the proposed scheme is that its design is fully based on the dynamical model of a single...

In this article, an active vibration control technique for direct-current electric motors subjected to harmonic mechanical load torque is introduced. Formulae to compute uncertain parameters of amplitude, frequency and phase angle of harmonic torque disturbances for angular velocity reference trajectory tracking are proposed. Vibrating torque distu...

We study stability of linear systems whose dynamics are described by systems of conformable fractional differential equations. We provide a framework in terms of behavioral system theory to develop a general modeling specification as well as stability conditions for conformable linear systems with a fractional differential order. We also provide su...

This paper presents the analysis and control design for an HB-NPC power converter which is used in a transformerless photovoltaic systems, and is aimed to guarantee active power injection to the grid. The system includes a Virtual-Ground connection to mitigate the leakage-ground currents, which are produced by the effect of common-mode voltage vari...

This paper contains a novel approach to DC-DC converter nonlinear control design, working on continuous conduction mode (CCM). In particular, the problem of instability induced by constant power loads (CPLs) is addressed. The proposed setting is based on the use of lifted models in terms of power and energy, obtained from voltage/current observable...

This chapter focuses on technological innovations in electric power infrastructure and their enabling potential for the integration of variable generation resources, electric vehicles (EVs), and microgrids. Many of the innovations described in this chapter were driven by evolving technical and economic constraints that long predated renewable grids...

This paper deals with the stabilization of DC–DC converters feeding constant power loads (CPLs). It is shown that power/energy dynamics are easily computed via the image of the input/output voltages/currents of the converter. Such image is represented by a high-order differential operator, obtained from first principles, acting on the variables of...

This paper presents a current-based control for a proton-exchange membrane fuel cell using the so-called double dual boost topology. In particular, we introduce a discrete time controller that, in coordination with a particular selection of inductors and capacitors, minimizes the switching ripple at the input port (current ripple) and the output po...

Electric vehicles EV are attracting attention due to their environmentally friendly operation; they market penetration may require the installation of a large number of charging stages, which is expensive and challenging from the logistic point of view. Hybrid electric vehicles HEV, may get charged from different sources which makes a flexible oper...

This paper presents a novel output voltage control of a high-gain interleaved DC-DC converter that is able to track a minimum input-current ripple. The controller encompasses three stages: a current stabilization loop, an output-voltage controller and a minimum ripple point tracking control law. The latter is a novel stage that enables a full opera...

This paper presents an analysis along with a design method and PWM operation for the series-capacitor boost converter, which reduces the input current ripple without increasing the stored energy in inductors, that is, without increasing their physical size. The method can also be applied to the buck version of the converter. Experimental results ar...

This paper proposes a new fourth-order dc-dc boost converter, developed as an improved version of the traditional Zeta converter, the main advantages of the proposed quasi-zeta converter are: (i) it can be constructed with a commercial half-bridge transistors package, in contrast with the traditional Zeta converter in which the diode and transistor...

In this paper is studied and presented the solution for the instability problem caused by the interconnection of DC converters with constant power loads (CPLs). A linear and a nonlinear energy-based approaches are proposed. Without the presence of CPLs, the stability of the DC-DC power converter is intrinsic, while with CPLs the stability must be i...

This paper focuses on the control design of DC-DC converters delivering power into energy distribution networks. The scenario where the destabilizers of the system called constant power loads (CPLs) are presented. The idea of the proposed scheme is to take advantage of the so-called persistency of excitation conditions, which is used to elaborate a...

This work presents a power-electronics based system for renewable energy applications, the system is driven with an only one switch quadratic type boost converter, the discussed converter is based on a stack of switching stages which provide a large voltage gain, a desirable feature for fuel cell generation systems, the converters gain function is...

This paper introduces a control design framework for modern DC-DC topologies with high-order dynamics. In particular, model-based and model-free approaches using high-order controllers are introduced. The model-based approach permits the use of a minimum number of sensors, even for converters with a high-number of components (e.g. multilevel, quadr...

This paper introduces discrete-time controllers for double dual boost converters, suitable for renewable energy applications. The proposed schemes are based on a current ripple mitigation technique, which enables an unconstrained input-to-output voltage converter gain. This is in contrast with classical interleaved topology implementations, where d...

This paper proposes a non-isolated quadratic boost converter that features a low output voltage ripple with respect to traditional quadratic boost converters. This advantage is in contrast with other topologies that require a higher amount of stored energy by capacitors to achieve the same output voltage ripple specification. This benefit permits t...

Fault detection and location is a challenging issue in microgrid protection, which is increasingly more complex in the
presence of distributed generators based on renewable energy, due to their inherent intermittency. In this context, a novel datadriven
approach for fault detection and location in microgrids is proposed, by using graph theory repre...

We introduce a model-free scheme that is capable of identifying topology changes in distribution networks using data from distribution-level phasor-measurement units (D-PMUs). To do so, we use algebraic tools of behavioral system theory to develop easy-to-implement algorithms. The intrinsic difficulties associated with D-PMU measurements and their...

A secondary distribution network (SDN), corresponding to the final user low voltage distribution circuit, is continuously growing due to a persistent increase in load demand. Consequently, the performance of any optimized design will inevitably degrade over time. To avoid the associated repercussions such as faults, congestion, voltage drops, and o...

Hybrid electric power systems based on fuel cell stack and energy storage sources like batteries and ultracapacitors are a plausible solution to vehicle electrification due to their balance between acceleration performance and range. Having a high degree of hybridization can be advantageous, considering the different characteristics of the power so...

This paper presents a novel output curren-t/voltage control for interleaved DC-DC converters with dual switched input-inductors, i.e., interleaved input induc-tors controlled by independent switches. The proposed approach is able to guarantee a minimum input-current-ripple point tracking (MCRPT) despite of variations on the operating point. The con...

This paper addresses the problem of stabilization of DC-DC converters feeding constant power loads (CPLs). An explicit model predictive control is developed based on an average model of a boost converter. The optimal control law is obtained off-line by solving a multiparametric nonlinear programming problem over a simplex partition of the state spa...

This work presents a novel method to identify the source of current unbalance during the interaction between industrial consumers and the utility. Since such unbalance yields detrimental effects over the network operation and efficiency; it must be mitigated to avoid their propagation towards the whole grid. To prevent this situation, regulations a...