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• JOURNAL ARTICLE
  Anagnostou G, Pal BC, 2018,

  Derivative-Free Kalman Filtering Based Approaches to Dynamic State Estimation for Power Systems With Unknown Inputs

  , IEEE TRANSACTIONS ON POWER SYSTEMS, Vol: 33, Pages: 116-130, ISSN: 0885-8950
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  • Citations: 3
• JOURNAL ARTICLE
  Bettiol P, Vinter RB, 2018,

  L-infinity estimates on trajectories confined to a closed subset, for control systems with bounded time variation

  , MATHEMATICAL PROGRAMMING, Vol: 168, Pages: 201-228, ISSN: 0025-5610
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• CONFERENCE PAPER
  Chen B, Pin G, Ng WM, Hui SYR, Parisini Tet al., 2018,

  An Adaptive-Observer-Based Robust Estimator of Multi-sinusoidal Signals

  , American Control Conference, Publisher: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, Pages: 1618-1631, ISSN: 0018-9286
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  • Citations: 5
• JOURNAL ARTICLE
  De Paola A, Angeli D, Strbac G, 2018,

  Integration of Price-Responsive Appliances in the Energy Market Through Flexible Demand Saturation

  , IEEE TRANSACTIONS ON CONTROL OF NETWORK SYSTEMS, Vol: 5, Pages: 154-166, ISSN: 2325-5870
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• JOURNAL ARTICLE
  Gu Y, Bottrell N, Green TC, 2018,

  Reduced-Order Models for Representing Converters in Power System Studies

  , IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 33, Pages: 3644-3654, ISSN: 0885-8993
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  • Citations: 1
• JOURNAL ARTICLE
  Judge PD, Chaffey G, Merlin MMC, Clemow PR, Green TCet al., 2018,

  Dimensioning and Modulation Index Selection for the Hybrid Modular Multilevel Converter

  , IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 33, Pages: 3837-3851, ISSN: 0885-8993
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• JOURNAL ARTICLE
  Judge PD, Merlin MMC, Green TC, Trainer DR, Vershinin Ket al., 2018,

  Thyristor-Bypassed Submodule Power-Groups for Achieving High-Efficiency, DC Fault Tolerant Multilevel VSCs

  , IEEE TRANSACTIONS ON POWER DELIVERY, Vol: 33, Pages: 349-359, ISSN: 0885-8977
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• JOURNAL ARTICLE
  Li Y, Junyent-Ferre A, Rodriguez-Bernuz J-M, 2018,

  A Three-Phase Active Rectifier Topology for Bipolar DC Distribution

  , IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 33, Pages: 1063-1074, ISSN: 0885-8993
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• JOURNAL ARTICLE
  Liang L, Hou Y, Hill DJ, Hui SYRet al., 2018,

  Enhancing Resilience of Microgrids With Electric Springs

  , IEEE Transactions on Smart Grid, Vol: 9, Pages: 2235-2247, ISSN: 1949-3053

  © 2016 IEEE. Extreme natural events have caused severe power system blackouts in recent years. It is important for power systems to survive after such events and recover the power supply, especially for critical loads (CLs), as soon as possible. In this paper, a control strategy is proposed for electric springs (ESs) to enhance resilience of microgrids with fluctuating renewable resources. First, the feasible operating region of the ES and the power-voltage curve of the bus connected with the ES are derived analytically. Second, according to the derived feasible operating region, a novel control strategy of ES is proposed to regulate the frequency and voltage of microgrids with and without a communication system. The voltages on CLs are considered as a critical constraint for enhancing resilience during extreme natural events. Finally, the method to enhance resilience of microgrids with ES under both the frequency support mode and the voltage support mode are studied. Case studies demonstrate that ESs can enhance the resilience of microgrids with the proposed strategy with and without a communication system after extreme natural events.

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• JOURNAL ARTICLE
  Ma S, Geng H, Liu L, Yang G, Pal BCet al., 2018,

  Grid-Synchronization Stability Improvement of Large Scale Wind Farm During Severe Grid Fault

  , IEEE TRANSACTIONS ON POWER SYSTEMS, Vol: 33, Pages: 216-226, ISSN: 0885-8950
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• JOURNAL ARTICLE
  Majumdar A, Agalgaonkar YP, Pal BC, Gottschalg Ret al., 2018,

  Centralized Volt-Var Optimization Strategy Considering Malicious Attack on Distributed Energy Resources Control

  , IEEE TRANSACTIONS ON SUSTAINABLE ENERGY, Vol: 9, Pages: 148-156, ISSN: 1949-3029
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• JOURNAL ARTICLE
  Majumdar A, Pal BC, 2018,

  Bad Data Detection in the Context of Leverage Point Attacks in Modern Power Networks

  , IEEE TRANSACTIONS ON SMART GRID, Vol: 9, Pages: 2042-2054, ISSN: 1949-3053
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  • Citations: 1
• JOURNAL ARTICLE
  McKenna R, Djapic P, Weinand J, Fichtner W, Strbac Get al., 2018,

  Assessing the implications of socioeconomic diversity for low carbon technology uptake in electrical distribution networks

  , APPLIED ENERGY, Vol: 210, Pages: 856-869, ISSN: 0306-2619
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  • Citations: 2
• JOURNAL ARTICLE
  Merlin MMC, Soto-Sanchez D, Judge PD, Chaffey G, Clemow P, Green TC, Trainer DR, Dyke KJet al., 2018,

  The Extended Overlap Alternate Arm Converter: A Voltage-Source Converter With DC Fault Ride-Through Capability and a Compact Design

  , IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 33, Pages: 3898-3910, ISSN: 0885-8993
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• JOURNAL ARTICLE
  Moreira A, Strbac G, Moreno R, Street A, Konstantelos Iet al., 2018,

  A Five-Level MILP Model for Flexible Transmission Network Planning Under Uncertainty: A Min-Max Regret Approach

  , IEEE TRANSACTIONS ON POWER SYSTEMS, Vol: 33, Pages: 486-501, ISSN: 0885-8950
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• JOURNAL ARTICLE
  Singh AK, Pal BC, 2018,

  Decentralized Nonlinear Control for Power Systems Using Normal Forms and Detailed Models

  , IEEE TRANSACTIONS ON POWER SYSTEMS, Vol: 33, Pages: 1160-1172, ISSN: 0885-8950
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• JOURNAL ARTICLE
  Thammawichai M, Kerrigan EC, 2018,

  Energy-efficient real-time scheduling for two-type heterogeneous multiprocessors

  , Real-Time Systems, Vol: 54, Pages: 132-165, ISSN: 0922-6443
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• JOURNAL ARTICLE
  Xiang X, Zhang X, Chaffey GP, Green TCet al., 2018,

  An Isolated Resonant Mode Modular Converter With Flexible Modulation and Variety of Configurations for MVDC Application

  , IEEE TRANSACTIONS ON POWER DELIVERY, Vol: 33, Pages: 508-519, ISSN: 0885-8977
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• JOURNAL ARTICLE
  Yan S, Wang MH, Yang TB, Tan SC, Chaudhuri B, Ron Hui SYet al., 2018,

  Achieving Multiple Functions of Three-Phase Electric Springs in Unbalanced Three-Phase Power Systems Using the Instantaneous Power Theory

  , IEEE Transactions on Power Electronics, Vol: 33, Pages: 5784-5795, ISSN: 0885-8993

  © 1986-2012 IEEE. Three-phase electric spring (3-ph ES) has recently been proposed as a fast demand response technology for applications in unbalanced power systems fed with a mixture of conventional and renewable power generation. Using the instantaneous power theory as the theoretical framework, this paper presents the criteria and conditions for minimizing the average and oscillating power of the 3-ph ES for the first time. A detailed analysis of the use of 3-ph ES is included for providing multiple control objectives of voltage regulation and power balancing of the 3-ph power system, and minimization of the average and oscillating ac power of the ES. A corresponding control scheme implementable in a single controller is included and explained. The control scheme has been practically verified with experiments.

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• JOURNAL ARTICLE
  Akhtar Z, Chaudhuri B, Hui SYR, 2017,

  Smart Loads for Voltage Control in Distribution Networks

  , IEEE Transactions on Smart Grid, Vol: 8, Pages: 937-946, ISSN: 1949-3053

  © 2010-2012 IEEE. This paper shows that the smart loads (SLs) could be effective in mitigating voltage problems caused by photovoltaic (PV) generation and electric vehicle (EV) charging in low-voltage (LV) distribution networks. Limitations of the previously reported SL configuration with only series reactive compensator (SLQ) (one converter) is highlighted in this paper. To overcome these limitations, an additional shunt converter is used in back-To-back (B2B) configuration to support the active power exchanged by the series converter, which increases the flexibility of the SL without requiring any energy storage. Simulation results on a typical U.K. LV distribution network are presented to compare the effectiveness of an SL with B2B converters (SLBCs) against an SLQ in tackling under-and over-voltage problems caused by EV or PV. It is shown that SLBCs can regulate the main voltage more effectively than SLQs especially under over-voltage condition. Although two converters are required for each SLBC, it is shown that the apparent power capacity of each converter is required to be significantly less than that of an equivalent SLQ.

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  • Citations: 7
• CONFERENCE PAPER
  Aldhaher S, Mitcheson PD, Arteaga JM, Kkelis G, Yates DCet al., 2017,

  Light-Weight Wireless Power Transfer for Mid-Air Charging of Drones

  , 11th European Conference on Antennas and Propagation (EUCAP), Publisher: IEEE, Pages: 336-340, ISSN: 2164-3342
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  • Citations: 1
• JOURNAL ARTICLE
  Ameli H, Qadrdan M, Strbac G, 2017,

  Value of gas network infrastructure flexibility in supporting cost effective operation of power systems

  , APPLIED ENERGY, Vol: 202, Pages: 571-580, ISSN: 0306-2619
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• CONFERENCE PAPER
  Angeli D, Athanasopoulos N, Jungers RM, Philippe Met al., 2017,

  Path-complete graphs and common Lyapunov functions

  , Pages: 81-90

  © 2017 ACM. A Path-Complete Lyapunov Function is an algebraic criterion composed of a finite number of functions, called pieces, and a directed, labeled graph defining Lyapunov inequalities between these pieces. It provides a stability certificate for discrete-time arbitrary switching systems. In this paper, we prove that the satisfiability of such a criterion implies the existence of a Common Lyapunov Function, expressed as the composition of minima and maxima of the pieces of the Path-Complete Lyapunov function. The converse however is not true even for discrete-time linear systems: we present such a system where a max-of-2 quadratics Lyapunov function exists while no corresponding Path-Complete Lyapunov function with 2 quadratic pieces exists. In light of this, we investigate when it is possible to decide if a Path-Complete Lyapunov function is less conservative than another. By analyzing the combinatorial and algebraic structure of the graph and the pieces respectively, we provide simple tools to decide when the existence of such a Lyapunov function implies that of another.

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• JOURNAL ARTICLE
  Arana C, Evangelou SA, Dini D, 2017,

  Series Active Variable Geometry Suspension application to comfort enhancement

  , CONTROL ENGINEERING PRACTICE, Vol: 59, Pages: 111-126, ISSN: 0967-0661
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  • Citations: 2
• JOURNAL ARTICLE
  Bachtiar V, Manzie C, Kerrigan EC, 2017,

  Nonlinear Model-Predictive Integrated Missile Control and Its Multiobjective Tuning

  , Journal of Guidance, Control, and Dynamics, Vol: 40, Pages: 2961-2970, ISSN: 0731-5090
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• JOURNAL ARTICLE
  Battistelli C, Agalgaonkar YP, Pal BC, 2017,

  Probabilistic Dispatch of Remote Hybrid Microgrids Including Battery Storage and Load Management

  , IEEE TRANSACTIONS ON SMART GRID, Vol: 8, Pages: 1305-1317, ISSN: 1949-3053
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  • Citations: 3
• JOURNAL ARTICLE
  Batzelis EI, 2017,

  Simple PV Performance Equations Theoretically Well Founded on the Single-Diode Model

  , IEEE Journal of Photovoltaics, Vol: 7, Pages: 1400-1409, ISSN: 2156-3381

  © 2017 IEEE. There are several photovoltaic (PV) performance models in the literature, but most of them either employ complex and tedious calculations or require additional measurements apart from datasheet information. In this paper, a new set of performance equations to evaluate the short-circuit current, open-circuit voltage, and maximum power point at any operating conditions is introduced. The proposed expressions are simple functions of the irradiance and temperature, while they are generally applicable to any crystalline PV module and require only datasheet information as input data. This is achieved by introducing new formulas to determine the irradiance and temperature coefficients that are not provided in the datasheet, thus avoiding empirical constants or additional measurements. The novelty of the performance equations is their solid theoretical background, as they are in excellent agreement with the single-diode PV model, combined with simple and easy application. The proposed PV model is validated and compared with other methods found in the literature through simulations in MATLAB and outdoor measurements on commercial PV modules.

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  • Citations: 2
• JOURNAL ARTICLE
  Batzelis EI, Kampitsis GE, Papathanassiou SA, 2017,

  Power Reserves Control for PV Systems With Real-Time MPP Estimation via Curve Fitting

  , IEEE TRANSACTIONS ON SUSTAINABLE ENERGY, Vol: 8, Pages: 1269-1280, ISSN: 1949-3029
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  • Citations: 2
• JOURNAL ARTICLE
  Boem F, Ferrari RMG, Keliris C, Parisini T, Polycarpou MMet al., 2017,

  A Distributed Networked Approach for Fault Detection of Large-Scale Systems

  , IEEE TRANSACTIONS ON AUTOMATIC CONTROL, Vol: 62, Pages: 18-33, ISSN: 0018-9286
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  • Citations: 11
• JOURNAL ARTICLE
  Cai L, Thornhill NF, Kuenzel S, Pal BCet al., 2017,

  Real-time detection of power system disturbances based on k-nearest neighbor analysis

  , IEEE Access, Vol: 5, Pages: 5631-5639, ISSN: 2169-3536

  Efficient disturbance detection is important for power system security and stability. In this paper, a new detection method is proposed based on a time series analysis technique known as k nearest neighbor (kNN) analysis. Advantages of this method are that it can deal with the electrical measurements with oscillatory trends and can be implemented in real time. The method consists of two stages which are the off-line modelling and the on-line detection. The off-line stage calculates a sequence of anomaly index values using kNN on the historical ambient data and then determines the detection threshold. Afterwards, the on-line stage calculates the anomaly index value of presently measured data by readopting kNN and compares it with the established threshold for detecting disturbances. To meet the real-time requirement, strategies for recursively calculating the distance metrics of kNN and for rapidly picking out the kth smallest metric are built. Case studies conducted on simulation data from the reduced equivalent model of Great Britain power system and measurements from an actual power system in Europe demonstrate the effectiveness of the proposed method.

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