@article {sakibreview, title = {A Review of DC Fault Blocking Converters for HVDC Transmission Systems}, year = {Submitted}, author = {Sakib, Munif Nazmus and Azad, Sahar Pirooz and Kazerani, Mehrdad} } @article {zhangreview, title = {A Review of the Protection of Microgrids with Converter-Based Resources}, year = {Submitted}, author = {ZHANG, X and AZAD, SP} } @conference {ahmadloo2020comparative, title = {A Comparative Study on Control Loop Interactions in VSC-HVDC Systems}, booktitle = {2020 IEEE Power \& Energy Society General Meeting (PESGM)}, year = {2020}, pages = {1{\textendash}5}, publisher = {IEEE}, organization = {IEEE}, author = {Ahmadloo, Fatemeh and Azad, Sahar Pirooz} } @conference {zare2020new, title = {A New Distance Protection Scheme for SCIG-based Wind Farms}, booktitle = {2020 IEEE Power \& Energy Society General Meeting (PESGM)}, year = {2020}, pages = {1{\textendash}5}, publisher = {IEEE}, organization = {IEEE}, author = {Zare, Javad and Azad, Sahar Pirooz} } @article {filabadi2020robust, title = {Robust optimisation framework for SCED problem in mixed AC-HVDC power systems with wind uncertainty}, journal = {IET Renewable Power Generation}, volume = {14}, number = {14}, year = {2020}, pages = {2563{\textendash}2572}, publisher = {IET Digital Library}, author = {Filabadi, Milad Dehghani and Azad, Sahar Pirooz} } @article {liu2019control, title = {Control strategies to improve stability of LCC-HVDC systems with multiple MMC taps}, journal = {IET Generation, Transmission \& Distribution}, volume = {13}, number = {20}, year = {2019}, pages = {4685{\textendash}4693}, publisher = {IET Digital Library}, author = {Liu, Dalu and Kish, Gregory J and Azad, Sahar Pirooz} } @article {13176, title = {Analytic Framework for HVDC Grid Protection Algorithm Design in Phase and Modal Domains}, journal = {IET Renewable Power Generation, Special Issue: DC and HVDC system technologies}, year = {2018}, author = {W. Leterme and S. P. Azad and D. Van Hertem} } @conference {nassif2018feeder, title = {Feeder voltage management through smart inverter advanced functions and battery energy storage system}, booktitle = {2018 IEEE Power \& Energy Society General Meeting (PESGM)}, year = {2018}, pages = {1{\textendash}5}, publisher = {IEEE}, organization = {IEEE}, author = {Nassif, Alexandre B and Greenwood-Madsen, Tom and Azad, Sahar Pirooz and Teshome, Dawit F} } @article {leterme2018hvdc, title = {HVDC grid protection algorithm design in phase and modal domains}, journal = {IET Renewable Power Generation}, volume = {12}, number = {13}, year = {2018}, pages = {1538{\textendash}1546}, publisher = {IET Digital Library}, author = {Leterme, Willem and Azad, Sahar Pirooz and Van Hertem, Dirk} } @article {7523993, title = {A Fast Local Bus Current-Based Primary Relaying Algorithm for HVDC Grids}, journal = {IEEE Transactions on Power Delivery}, volume = {32}, number = {1}, year = {2017}, month = {February}, pages = {193-202}, keywords = {Circuit faults, computation capacity, converter outages, Current measurement, current sensors, DC buses, erroneous circuit-breaker trips, fault currents, fault detection, fault location, faults locations, high-voltage direct current, HVDC grids, HVDC power transmission, HVDC transmission, HVDC transmission lines, line outages, local bus current-based primary relaying algorithm, measurement noise, power grids, power system protection, power system relaying, power system transients, power transmission lines, power transmission protection, power transmission reliability, Protective relaying, Sensors, system transients, Transmission line measurements, transmission lines, Voltage measurement}, issn = {0885-8977}, author = {S. P. Azad and D. Van Hertem} } @article {mokhberdoran2017protection, title = {Protection of HVDC grids using unidirectional DC circuit breakers and fast local protection algorithm}, year = {2017}, publisher = {IET Digital Library}, author = {Mokhberdoran, Ataollah and Azad, S Pirooz and Van Hertem, Dirk and Silva, Nuno and Carvalho, Adriano} } @conference {7934940, title = {Protection of HVDC Grids Using Unidirectional DC Circuit Breakers and Fast Local Protection Algorithm}, booktitle = {13th IET International Conference on AC and DC Power Transmission (ACDC 2017)}, year = {2017}, month = {February}, pages = {1-6}, keywords = {circuit breakers, current releasing DC circuit breaker, DC circuit breaker, fast local protection algorithm, HVDC grid, HVDC grid protection, HVDC power transmission, multiterminal HVDC grid, nonunit protection algorithm, power grids, power transmission protection, Protection, unidirectional DC circuit breakers, unidirectional protection}, author = {A. Mokhberdoran and S. P. Azad and D. Van Hertem and N. Silvao and A. Carvalho} } @article {7024954, title = {Decentralized Supplementary Control of Multiple LCC-HVDC Links}, journal = {IEEE Transactions on Power Systems}, volume = {31}, number = {1}, year = {2016}, month = {January}, pages = {572-580}, keywords = {closed loop systems, closed-loop stability, communication delays, communication noise, Damping, decentralised control, Decentralized control, decentralized supplementary control, decentralized wide-area coordinated supplementary control, eigen analysis, eigenvalues and eigenfunctions, Generators, high voltage direct current (HVDC), high voltage direct current links, HVDC power transmission, HVDC transmission, inter-area oscillations, interarea oscillatory mode damping, interconnected AC system, Mathematical model, multiple LCC-HVDC links, multiple line-commutated converter, optimal control, power system interconnection, power system stability, power transmission control, power transmission lines, sparsity, time-domain analysis, time-domain simulation, Voltage control}, issn = {0885-8950}, author = {S. P. Azad and J. A. Taylor and R. Iravani} } @article {PIROOZAZAD201699, title = {Fast Breaker Failure Backup Protection for HVDC Grids}, journal = {Electric Power Systems Research}, volume = {138}, year = {2016}, note = {Special Issue: Papers from the 11th International Conference on Power Systems Transients (IPST)}, pages = {99 - 105}, keywords = {Backup protection, breaker failure, HVDC grid, power system protection, VSC HVDC}, issn = {0378-7796}, url = {http://www.sciencedirect.com/science/article/pii/S0378779616300505}, author = {S. P. Azad and W. Leterme and D. Van Hertem} } @article {azad2016fast, title = {Fast breaker failure backup protection for HVDC grids}, journal = {Electric Power Systems Research}, volume = {138}, year = {2016}, pages = {99{\textendash}105}, publisher = {Elsevier}, author = {Azad, Sahar Pirooz and Leterme, Willem and Van Hertem, Dirk} } @article {azad2016fast, title = {A fast local bus current-based primary relaying algorithm for HVDC grids}, journal = {IEEE Transactions on Power Delivery}, volume = {32}, number = {1}, year = {2016}, pages = {193{\textendash}202}, publisher = {IEEE}, author = {Azad, Sahar Pirooz and Van Hertem, Dirk} } @article {leterme2016local, title = {A local backup protection algorithm for HVDC grids}, journal = {IEEE Transactions on Power Delivery}, volume = {31}, number = {4}, year = {2016}, pages = {1767{\textendash}1775}, publisher = {IEEE}, author = {Leterme, Willem and Azad, Sahar Pirooz and Van Hertem, Dirk} } @article {7435320, title = {A Local Backup Protection Algorithm for HVDC Grids}, journal = {IEEE Transactions on Power Delivery}, volume = {31}, number = {4}, year = {2016}, month = {August}, pages = {1767-1775}, keywords = {Backup protection, breaker failure, Circuit faults, current waveform, DC breaker operation, DC fault, Delays, fast backup relaying algorithm, fault current interruption interval, fault currents, HVDC grid, HVDC power transmission, HVDC transmission, Interrupters, local backup protection algorithm, power electronics, power system protection, power transmission faults, power transmission protection, power transmission reliability, power-electronics component, primary protection malfunction detection, protective relaying algorithm, relay failure subsystem, relaying algorithm, Relays, system reliability, Voltage measurement, voltage waveform}, issn = {0885-8977}, author = {W. Leterme and S. P. Azad and D. Van Hertem} } @conference {5772553, title = {A DC Grid Primary Protection Algorithm Based on Current Measurements}, booktitle = {European Conference on Power Electronics and Applications}, year = {2015}, month = {September}, pages = {1-6}, author = {S. P. Azad and W. Leterme and D. Van Hertem} } @conference {azad2015dc, title = {A DC grid primary protection algorithm based on current measurements}, booktitle = {2015 17th European Conference on Power Electronics and Applications (EPE{\textquoteright}15 ECCE-Europe)}, year = {2015}, pages = {1{\textendash}10}, publisher = {IEEE}, organization = {IEEE}, author = {Azad, S Pirooz and Leterme, Willem and Van Hertem, Dirk} } @article {azad2015decentralized, title = {Decentralized supplementary control of multiple LCC-HVDC links}, journal = {IEEE Transactions on Power Systems}, volume = {31}, number = {1}, year = {2015}, pages = {572{\textendash}580}, publisher = {IEEE}, author = {Azad, Sahar Pirooz and Taylor, Joshua Adam and Iravani, Reza} } @article {6913585, title = {Dynamic Stability Enhancement of a DC-Segmented AC Power System Via HVDC Operating-Point Adjustment}, journal = {IEEE Transactions on Power Delivery}, volume = {30}, number = {2}, year = {2015}, month = {April}, pages = {657-665}, keywords = {bifurcation, Damping, damping improvement, DC-segmented AC power system configurations, eigenvalues and eigenfunctions, first-order sensitivity, Hopf bifurcation stability margin, HVDC link controllers, HVDC operating-point adjustment, HVDC power transmission, HVDC transmission, HVDC transmission control, line impedance variations, load impedance variations, optimum direction, oscillatory dynamic stability enhancement, power system control, power system dynamic stability, power system stability, power transmission control, Sensitivity, setpoint value adjustment, Stability analysis}, issn = {0885-8977}, author = {S. P. Azad and R. Iravani and J. E. Tate} } @conference {5772553, title = {Fast Breaker Failure Backup Protection for HVDC Grids}, booktitle = {International Conference on Power Systems Transients}, year = {2015}, month = {June}, pages = {1-6}, author = {W. Leterme and S. P. Azad and D. Van Hertem} } @article {leterme2015fast, title = {Fast breaker failure backup protection for HVDC grids}, journal = {Proc. IPST 2015}, year = {2015}, pages = {1{\textendash}6}, author = {Leterme, Willem and Pirooz Azad, Sahar and Van Hertem, Dirk} } @conference {5772553, title = {Interoperability of Protection Systems in High Voltage Direct Current (HVDC) Networks}, booktitle = {CIGRE Canada Conference - Future Power Systems and Grid Resiliency}, year = {2015}, month = {October}, pages = {1-6}, author = {A. Hejazizo and S. P. Azad and D. Van Hertem} } @article {azad2015stability, title = {Stability enhancement of a DC-segmented AC power system}, journal = {IEEE Transactions on Power Delivery}, volume = {30}, number = {2}, year = {2015}, pages = {737{\textendash}745}, publisher = {IEEE}, author = {Azad, Sahar Pirooz and Iravani, Reza and Tate, Joseph Euzebe} } @article {7064815, title = {Stability Enhancement of a DC-Segmented AC Power System}, journal = {IEEE Transactions on Power Delivery}, volume = {30}, number = {2}, year = {2015}, month = {April}, pages = {737-745}, keywords = {constant current sources, controlled transfer, coordinated supplementary control, Damping, DC-segmented AC power system, global supplementary control, GSC strategy, high voltage DC current, HVDC power convertors, HVDC transmission, Inverters, LCC-HVDC link, line-commutated current-sourced converter, linear quadratic Gaussian method, LQG control, LQG method, Modulation, Oscillators, oscillatory dynamic propagation, power system control, Power system dynamics, power system stability, segmentation, stability enhancement, three-segment AC system}, issn = {0885-8977}, author = {S. P. Azad and R. Iravani and J. E. Tate} } @conference {pirooz2014coordination, title = {Coordination of AC and DC Power System Models for Inter-Area Damping Controller Design}, booktitle = {CIGRE Int. Symp. Innovation for Secure and Efficient Transmission Grids, Date: 2014/03/01-2014/03/01, Location: Brussels, Belgium}, year = {2014}, author = {Pirooz Azad, Sahar and Iravani, Reza and Tate, Joseph} } @conference {5772553, title = {Coordination of AC and DC Power System Models for Inter-Area Damping Controller Design}, booktitle = {CIGRE International Symposium-Innovation for Secure and Efficient Transmission Grids}, year = {2014}, month = {March}, pages = {1-6}, author = {S. P. Azad and J. E. Tate and R. Iravani} } @article {azad2014dynamic, title = {Dynamic stability enhancement of a DC-segmented AC power system via HVDC operating-point adjustment}, journal = {IEEE Transactions on Power Delivery}, volume = {30}, number = {2}, year = {2014}, pages = {657{\textendash}665}, publisher = {IEEE}, author = {Azad, Sahar Pirooz and Iravani, Reza and Tate, Joseph Euzebe} } @mastersthesis {azad2014small, title = {Small-signal dynamic stability enhancement of a DC-segmented AC power system}, year = {2014}, school = {University of Toronto}, type = {phd}, author = {Azad, Sahar Pirooz} } @article {azad2013damping, title = {Damping inter-area oscillations based on a model predictive control (MPC) HVDC supplementary controller}, journal = {IEEE Transactions on Power Systems}, volume = {28}, number = {3}, year = {2013}, pages = {3174{\textendash}3183}, publisher = {IEEE}, author = {Azad, Sahar Pirooz and Iravani, Reza and Tate, Joseph Euzebe} } @article {6480906, title = {Damping Inter-Area Oscillations Based on a Model Predictive Control (MPC) HVDC Supplementary Controller}, journal = {IEEE Transactions on Power Systems}, volume = {28}, number = {3}, year = {2013}, month = {August}, pages = {3174-3183}, keywords = {Control systems, current control, Current measurement, Damping, electric current control, HVDC power convertors, HVDC supplementary controller, HVDC transmission, IEEE 14-bus system, inter-area oscillations, line-commutated HVDC link, linear quadratic Gaussian control, LQG control, model predictive control, model predictive control (MPC), MPC, Noise, Noise measurement, Oscillators, plant constraints, power system control, power system stability, power systems, predictive control, salient feature, signal disturbance, Western System Coordinating Council, WSCC 9-bus system}, issn = {0885-8950}, author = {S. P. Azad and R. Iravani and J. E. Tate} } @conference {6672685, title = {Damping Low-Frequency Oscillations by Tuning the Operating Point of a DC-Segmented AC System}, booktitle = {IEEE Power Energy Society General Meeting}, year = {2013}, month = {July}, pages = {1-5}, keywords = {AC transmission lines, Damping, damping low-frequency oscillation mode, damping ratio, DC-segmented AC system, economic dispatch, generation cost, HVDC power transmission, HVDC transmission, large AC power systems, line-commutated HVDC links, load flow control, optimisation, optimization, optimization problem, optimum set-points, Oscillators, power flow control, power system stability, power transmission control, power transmission lines, Reactive power, small-signal stability enhancement, Stability analysis, system operating point tuning, underdamped oscillatory modes}, issn = {1932-5517}, author = {S. P. Azad and R. Iravani and J. E. Tate} } @conference {azad2013damping, title = {Damping low-frequency oscillations by tuning the operating point of a dc-segmented ac system}, booktitle = {2013 IEEE Power \& Energy Society General Meeting}, year = {2013}, pages = {1{\textendash}5}, publisher = {IEEE}, organization = {IEEE}, author = {Azad, Sahar Pirooz and Iravani, Reza and Tate, Joseph Euzebe} } @conference {pirooz2011parameter, title = {Parameter Estimation of a Doubly Fed Induction Generator Driven by Wind Turbine}, booktitle = {IEEE/PES Power Systems Conference and Exposition (PSCE), Date: 2011/03/01-2011/03/01, Location: Phoenix, AZ}, year = {2011}, author = {Pirooz Azad, Sahar and Tate, Joseph} } @conference {azad2011parameter, title = {Parameter estimation of doubly fed induction generator driven by wind turbine}, booktitle = {2011 IEEE/PES Power Systems Conference and Exposition}, year = {2011}, pages = {1{\textendash}8}, publisher = {IEEE}, organization = {IEEE}, author = {Azad, Sahar Pirooz and Tate, Joseph Euzebe} } @conference {5772553, title = {Parameter Estimation of Doubly Fed Induction Generator Driven by Wind Turbine}, booktitle = {2011 IEEE/PES Power Systems Conference and Exposition}, year = {2011}, month = {March}, pages = {1-8}, keywords = {asynchronous generators, computation time, computational complexity, doubly fed induction generator, electric power generation, electrical energy, estimation accuracy, European power systems, extended Kalman filter, Generators, Kalman filter based estimation techniques, Kalman filters, kinetic energy, Mathematical model, Noise, nonlinear filters, North American power systems, parameter estimation, power filters, renewable energy sources, renewable resources, Rotors, Stators, unscented Kalman filter, wind turbine, wind turbines}, author = {S. P. Azad and J. E. Tate} } @conference {pirooz2011small, title = {Small Signal Stability Improvement of AC Transmission Networks Using HVDC Grid}, booktitle = {CIGRE Int. Symp. Electric Power Syst. Future-Integrating Supergrids and Microgrid, Date: 2011/09/01-2011/09/01, Location: Bologna, Italy}, year = {2011}, author = {Pirooz Azad, Sahar and Iravani, Reza and Tate, Joseph} } @conference {5772553, title = {Small Signal Stability Improvement of AC Transmission Networks Using HVDC Grid}, booktitle = {CIGRE International Symposium Electric Power System Future-Integrating Supergrids and Microgrid}, year = {2011}, month = {September}, pages = {1-6}, author = {S. P. Azad and J. E. Tate and R. Iravani} }