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Lewei Zhu - IEEE Xplore Author Profile

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Author details

Lewei Zhu

Also published under: L. W. Zhu, LeWei Zhu

Publications

33

Citations

256

Publications by Year

20152024

Co-Authors:

Zihan CaiWenqing CuiM. G. DanikasB. X. DuJie Du

Show All Co-Authors (58)

Lewei Zhu

Also published under: L. W. Zhu, LeWei Zhu

Affiliation

Electric Power Research Institute

State Grid Tianjin Electrical Power Company

Tianjin, China

Publication Topics

Load Shedding,
Energy System,
Power System,
Distribution Network,
Electrical Load,
Energy Storage Devices,
Lagrange Multiplier,
Linear Problem,
Linear Programming,
Objective Function,
Operational Costs,
Optimal Power Flow

Biography

Lewei Zhu (Member, IEEE) received the Ph.D. degree in electrical engineering from Tianjin University, Tianjin, China, in 2019. She is currently a Lecturer with Maritime College, Tianjin University of Technology, Tianjin, China. Her research interests include dielectric failure mechanisms of cable insulation materials, power equipment insulation aging, and risk assessments of power systems.(Based on document published on 15 December 2020).

Publications

33

Citations

256

Publications by Year

20152024

Co-Authors:

Zihan Cai
Wenqing Cui
M. G. Danikas
B. X. Du
Jie Du

Show All Co-Authors (58)

Author's Published Works

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Showing 1-25 of 31 results

Conferences (22)

Journals (9)

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E. Dirks(23)
P.G. McLaren(22)
G.W. Swift(10)
R.P. Jayasinghe(10)
Z. Zhang(8)
University of Manitoba, Canada(7)
Department of Electrical and Computer Engineering, University of Manitoba, Winnipeg, MAN, Canada(6)
University of Manitoba, Winnipeg, MAN, Canada(5)
Vansco Electronics Limited, Winnipeg, Canada(3)
Center for Advanced Power Systems, Florida State University, Tallahassee, FL, USA(3)
IEEE Transactions on Power Delivery(8)
IEEE CCECE2002. Canadian Conference on Electrical and Computer Engineering. Conference Proceedings (Cat. No.02CH37373)(2)
IEEE WESCANEX 95. Communications, Power, and Computing. Conference Proceedings(2)
Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering(2)
1999 IEEE Transmission and Distribution Conference (Cat. No. 99CH36333)(1)
IEEE(31)
Winnipeg, MB, Canada(5)
Calgary, AB, Canada(3)
Athens, Greece(1)
Chicago, IL, USA(1)
Edmonton, AB, Canada(1)
Power System(10)
Waveform(8)
Digital Signal Processing(7)
Per Cycle(7)
Discrete Fourier Transform(6)

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Results

Electronic differential design for a vehicle with four independently controlled in-wheel motors

Amin Hajihosseinlu;Shaahin Filizadeh;Garry Bistyak;Erwin Dirks

2014 IEEE International Electric Vehicle Conference (IEVC)

Year: 2014 | Conference Paper |

Cited by: Papers (2)

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In this paper a simple topology for electronic differential in an electric vehicle with four independent In-wheel motors is proposed. Based on inputs of the steering wheel angle and the acceleration pedal position, this method uses real-time power management and produces different torque references for the four wheels and, consequently the angular velocity of each wheel will be adjusted. Using sli...Show More

Electronic differential design for a vehicle with four independently controlled in-wheel motors

Amin Hajihosseinlu;Shaahin Filizadeh;Garry Bistyak;Erwin Dirks

2014 IEEE International Electric Vehicle Conference (IEVC)

Year: 2014 | Conference Paper |

Battery-in-the-Loop Simulation of a Planetary-Gear-Based Hybrid Electric Vehicle

Ehsan Tara;Shaahin Filizadeh;Erwin Dirks

IEEE Transactions on Vehicular Technology

Year: 2013 | Volume: 62, Issue: 2 | Journal Article |

Cited by: Papers (12)

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This paper deals with the development of a hardware-in-the-loop (HIL) real-time simulation setup for vehicular systems. In modeling a vehicular drivetrain, the battery model poses the greatest challenge. Mathematical battery models suitable for real-time and transient simulation are often inaccurate due to internal electrochemical reactions in the battery and external factors such as loading condi...Show More

Battery-in-the-Loop Simulation of a Planetary-Gear-Based Hybrid Electric Vehicle

Ehsan Tara;Shaahin Filizadeh;Erwin Dirks

IEEE Transactions on Vehicular Technology

Year: 2013 | Volume: 62, Issue: 2 | Journal Article |

Dynamic average-value modeling of hybrid-electric

Ehsan Tara;Shaahin Filizadeh;Juri Jatskevich;Erwin Dirks;Ali Davoudi;Maryam Saeedifard;Kai Strunz;Vijay Sood

2012 IEEE Power and Energy Society General Meeting

Year: 2012 | Conference Paper |

Cited by: Papers (1)

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Summary form only given. This paper extends the concept of dynamic average-value modeling to power-electronic-intensive hybrid-electric vehicular power trains. Hybrid vehicles with plug-in capability are becoming increasingly important in the study of emerging smart power grids, and their simulation using digital programs has gained widespread attention. This paper demonstrates the usefulness of a...Show More

Dynamic average-value modeling of hybrid-electric

Ehsan Tara;Shaahin Filizadeh;Juri Jatskevich;Erwin Dirks;Ali Davoudi;Maryam Saeedifard;Kai Strunz;Vijay Sood

2012 IEEE Power and Energy Society General Meeting

Year: 2012 | Conference Paper |

Dynamic Average-Value Modeling of Hybrid-Electric Vehicular Power Systems

E. Tara;S. Filizadeh;J. Jatskevich;E. Dirks;A. Davoudi;M. Saeedifard;K. Strunz;V. K. Sood

IEEE Transactions on Power Delivery

Year: 2012 | Volume: 27, Issue: 1 | Journal Article |

Cited by: Papers (19)

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This paper extends the concept of dynamic average-value modeling to power-electronic-intensive hybrid-electric vehicular power trains. Hybrid vehicles with plug-in capability are becoming increasingly important in the study of emerging smart power grids, and their simulation using digital programs has gained widespread attention. This paper demonstrates the usefulness of averaging in preserving th...Show More

Dynamic Average-Value Modeling of Hybrid-Electric Vehicular Power Systems

E. Tara;S. Filizadeh;J. Jatskevich;E. Dirks;A. Davoudi;M. Saeedifard;K. Strunz;V. K. Sood

IEEE Transactions on Power Delivery

Year: 2012 | Volume: 27, Issue: 1 | Journal Article |

Rapid prototyping of control systems from electromagnetic transient simulator program

Dexter M. T. J. Williams;Esa Nummijoki;Aniruddha M. Gole;Erwin Dirks

2011 IEEE Electrical Power and Energy Conference

Year: 2011 | Conference Paper |

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The traditional approach to designing FACTS and HVDC system controls, are to run electromagnetic transients (EMT) simulations of the power network and the proposed controller strategy. After the design is completed, the controls can be re-implemented in hardware. However, prototyping the controls from EMT programs into a microcontroller platform is a long and arduous task. This paper reports on an...Show More

Rapid prototyping of control systems from electromagnetic transient simulator program

Dexter M. T. J. Williams;Esa Nummijoki;Aniruddha M. Gole;Erwin Dirks

2011 IEEE Electrical Power and Energy Conference

Year: 2011 | Conference Paper |

Performance evaluation of a building integrated photovoltaic array using an Internet based monitoring system

E. Dirks;A.M. Gole;T.S. Molinski

2006 IEEE Power Engineering Society General Meeting

Year: 2006 | Conference Paper |

Cited by: Papers (11)

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The performance of a solar photovoltaic array statically placed on a large urban building is analyzed. The design of a custom monitoring system is described which measures electrical quantities as well as internal panel temperatures and solar intensity. The system is capable of remote interrogation over the Internet. Data collected over a period of two years at twenty minute intervals is used to e...Show More

Performance evaluation of a building integrated photovoltaic array using an Internet based monitoring system

E. Dirks;A.M. Gole;T.S. Molinski

2006 IEEE Power Engineering Society General Meeting

Year: 2006 | Conference Paper |

Hardware and software implementation of a travelling wave based protection relay

V. Pathirana;E. Dirks;P.G. McLaren

IEEE Power Engineering Society General Meeting, 2005

Year: 2005 | Conference Paper |

Cited by: Papers (7)

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Fault generated transient signals can undoubtedly be employed to achieve ultra-high-speeds in transmission line protection. Even though such transient based schemes can quickly detect a faulty state on the power system, they face several challenges. Firstly, they have inherent reliability problems and secondly, it is difficult to implement them as a real-time product due to their excessive demand ...Show More

Hardware and software implementation of a travelling wave based protection relay

V. Pathirana;E. Dirks;P.G. McLaren

IEEE Power Engineering Society General Meeting, 2005

Year: 2005 | Conference Paper |

Using impedance measurement to improve the reliability of traveling-wave distance protection

V. Pathirana;E. Dirks;P.G. McLaren

2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491)

Year: 2003 | Conference Paper |

Cited by: Papers (1)

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Two common problems associated with distance protection schemes based on traveling waves are close-up faults and faults with small inception angles. This paper examines how the reliability of such a relay may be improved by considering the measured impedance at the relay location. The composite algorithm describes how the traveling wave information and line impedance measurement can be used in par...Show More

Using impedance measurement to improve the reliability of traveling-wave distance protection

V. Pathirana;E. Dirks;P.G. McLaren

2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491)

Year: 2003 | Volume: 3 | Conference Paper |

A graphical block platform for real-time DSP-based digital relay development

Jingxuan Hu;P.G. McLaren;E. Dirks;Pei Wang;B. Bisewski

Proceedings. International Conference on Power System Technology

Year: 2002 | Conference Paper |

Cited by: Patents (1)

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Computer relaying is playing an ever more important role in power system protection as technology advances. This paper describes an integrated graphical block platform for digital relay development, which was built using commercial software Hypersignal RIDE, Microsoft Visual C++ and digital signal processor (DSP) hardware. The developed platform aims to aid researchers/relay engineers to design cu...Show More

A graphical block platform for real-time DSP-based digital relay development

Jingxuan Hu;P.G. McLaren;E. Dirks;Pei Wang;B. Bisewski

Proceedings. International Conference on Power System Technology

Year: 2002 | Volume: 1 | Conference Paper |

Investigation of a hybrid travelling wave/impedance relay principle

V. Pathirana;P.G. McLaren;E. Dirks

IEEE CCECE2002. Canadian Conference on Electrical and Computer Engineering. Conference Proceedings (Cat. No.02CH37373)

Year: 2002 | Conference Paper |

Cited by: Papers (7)

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The paper describes how the fast fault detection capability of travelling wave protection schemes and proven impedance measurement techniques can be used in parallel in a single protection scheme to develop a high-speed, reliable distance relay. The high frequency transient components of the voltage and current waveforms contain valuable information about the fault location and the fault-inception...Show More

Investigation of a hybrid travelling wave/impedance relay principle

V. Pathirana;P.G. McLaren;E. Dirks

IEEE CCECE2002. Canadian Conference on Electrical and Computer Engineering. Conference Proceedings (Cat. No.02CH37373)

Year: 2002 | Volume: 1 | Conference Paper |

Simulation of eddy current effects in transformers

W. Chandrasena;P.G. McLaren;U.D. Annakkage;R.P. Jayasinghe;E. Dirks

IEEE CCECE2002. Canadian Conference on Electrical and Computer Engineering. Conference Proceedings (Cat. No.02CH37373)

Year: 2002 | Conference Paper |

Cited by: Papers (1)

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This paper describes the development of an electromagnetic transient model to represent the eddy current effects in transformer magnetising current. The magnetising current of a transformer is both nonlinear and frequency dependent. The frequency dependence is due to eddy currents. The most commonly used method to represent losses in a transformer model is to add a shunt resistance across one wind...Show More

Simulation of eddy current effects in transformers

W. Chandrasena;P.G. McLaren;U.D. Annakkage;R.P. Jayasinghe;E. Dirks

IEEE CCECE2002. Canadian Conference on Electrical and Computer Engineering. Conference Proceedings (Cat. No.02CH37373)

Year: 2002 | Volume: 1 | Conference Paper |

A synchronous machine model to analyze internal faults

D. Muthumuni;P.G. McLaren;E. Dirks;V. Pathirana

Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248)

Year: 2001 | Conference Paper |

Cited by: Papers (7)

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This paper presents a model of a synchronous machine which is capable of representing internal faults in the windings. Since the topology of the circuit representing the machine is altered in the presence of such faults, the two-reaction theory and the resulting Park Transformation cannot be readily applied in these situations. The model presented is derived in the phase domain. The model takes in...Show More

A synchronous machine model to analyze internal faults

D. Muthumuni;P.G. McLaren;E. Dirks;V. Pathirana

Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248)

Year: 2001 | Volume: 3 | Conference Paper |

Simulation of differential current protection schemes involving multiple current transformers and a varistor

W. Chandrasena;P.G. McLaren;R.P. Jayasinghe;D. Muthumuni;E. Dirks;A. Parker

2001 Power Engineering Society Summer Meeting. Conference Proceedings (Cat. No.01CH37262)

Year: 2001 | Conference Paper |

Cited by: Papers (4)

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This paper presents the simulation of multiple current transformers (CTs) operating in parallel into a common spill circuit. The voltage across the spill branch in the high impedance case can be quite high and a varistor (MOV) may be placed across the spill branch to keep this voltage within safe limits.Show More

Simulation of differential current protection schemes involving multiple current transformers and a varistor

W. Chandrasena;P.G. McLaren;R.P. Jayasinghe;D. Muthumuni;E. Dirks;A. Parker

2001 Power Engineering Society Summer Meeting. Conference Proceedings (Cat. No.01CH37262)

Year: 2001 | Volume: 2 | Conference Paper |

Discussion of "A current transformer model based on the Jiles-Atherton theory of ferromagnetic hysteresis" [Closure to discussion]

W.C. Kotheimer;U.D. Annakkage;P.G. McLaren;E. Dirks;R.P. Jayasinghe;A.D. Parker

IEEE Transactions on Power Delivery

Year: 2000 | Volume: 15, Issue: 4 | Journal Article |

Cited by: Papers (5)

W.C. Kotheimer comments on the paper by U.D. Annakkage et al. (see ibid., vol.15, no.1, p.57-61, 2000). The author points out that the original authors have identified an apparent limitation of the Jiles-Atherton algorithm using the Langevin function when used to model the core of a current transformer subjected to high fault currents in the presence of a significant amount of remanence. The origi...Show More

Discussion of "A current transformer model based on the Jiles-Atherton theory of ferromagnetic hysteresis" [Closure to discussion]

W.C. Kotheimer;U.D. Annakkage;P.G. McLaren;E. Dirks;R.P. Jayasinghe;A.D. Parker

IEEE Transactions on Power Delivery

Year: 2000 | Volume: 15, Issue: 4 | Journal Article |

A current transformer model based on the Jiles-Atherton theory of ferromagnetic hysteresis

U.D. Annakkage;P.G. McLaren;E. Dirks;R.P. Jayasinghe;A.D. Parker

IEEE Transactions on Power Delivery

Year: 2000 | Volume: 15, Issue: 1 | Journal Article |

Cited by: Papers (180)

The hysteresis loop of the core material in a test current transformer is simulated using the Jiles-Atherton theory. Comparisons are made between recorded and simulated waveforms and it is found necessary to replace the modified Langevin function used by Jiles and Atherton. Using an alternative function described in the paper, good agreement is achieved between test and simulated waveforms.Show More

A current transformer model based on the Jiles-Atherton theory of ferromagnetic hysteresis

U.D. Annakkage;P.G. McLaren;E. Dirks;R.P. Jayasinghe;A.D. Parker

IEEE Transactions on Power Delivery

Year: 2000 | Volume: 15, Issue: 1 | Journal Article |

Internal fault simulation in synchronous machines

D.De S. Muthumuni;E. Dirks

2000 Canadian Conference on Electrical and Computer Engineering. Conference Proceedings. Navigating to a New Era (Cat. No.00TH8492)

Year: 2000 | Conference Paper |

Cited by: Papers (7)

This paper describes a synchronous machine model that can be used to simulate internal fault waveforms for power system protection studies. The need to develop the machine model in the direct phase domain is explained and a method to calculate the inductances involving the faulty windings is outlined using a four pole lap wound machine. The machine equations are then solved using a suitable numeri...Show More

Internal fault simulation in synchronous machines

D.De S. Muthumuni;E. Dirks

2000 Canadian Conference on Electrical and Computer Engineering. Conference Proceedings. Navigating to a New Era (Cat. No.00TH8492)

Year: 2000 | Volume: 2 | Conference Paper |

Simulation of a differential current protection scheme involving multiple current transformers

U.D. Anndkkage;Ming Yu;P.G. Mclaren;E. Dirks;A.D. Parker

IEEE Transactions on Power Delivery

Year: 2000 | Volume: 15, Issue: 2 | Journal Article |

Cited by: Papers (5)

Differential protection schemes for busbars, generators or transformers connect multiple current transformers in parallel across a common burden. This paper describes the techniques used to simulate such an arrangement and concentrates particularly on the three current transformer case.Show More

Simulation of a differential current protection scheme involving multiple current transformers

U.D. Anndkkage;Ming Yu;P.G. Mclaren;E. Dirks;A.D. Parker

IEEE Transactions on Power Delivery

Year: 2000 | Volume: 15, Issue: 2 | Journal Article |

Self adaptive impedance relays

P.G. McLaren;H. Li;E. Dirks

Engineering Solutions for the Next Millennium. 1999 IEEE Canadian Conference on Electrical and Computer Engineering (Cat. No.99TH8411)

Year: 1999 | Conference Paper |

The performance of power system protection systems can be enhanced by adapting their operating boundaries and criteria to suit the prevailing conditions in the system at the time of the fault. This paper considers the way in which a numerical impedance relay might adapt its operating characteristics based on features detected in its voltage and current input signals.Show More

Self adaptive impedance relays

P.G. McLaren;H. Li;E. Dirks

Engineering Solutions for the Next Millennium. 1999 IEEE Canadian Conference on Electrical and Computer Engineering (Cat. No.99TH8411)

Year: 1999 | Volume: 3 | Conference Paper |

Real time simulation of CT's in a current differential protection scheme

P.G. McLaren;E. Dirks;U.D. Annakkage;R.P. Jayasinghe;A. Parker

1999 IEEE Transmission and Distribution Conference (Cat. No. 99CH36333)

Year: 1999 | Conference Paper |

Cited by: Papers (2)

The Jiles/Atherton phenomenological model of a ferromagnetic material is used in the simulation of current transformers (CTs) in a differential current protection scheme. The results of simulation studies for a two CT scheme are compared to waveforms recorded during practical tests.Show More

Real time simulation of CT's in a current differential protection scheme

P.G. McLaren;E. Dirks;U.D. Annakkage;R.P. Jayasinghe;A. Parker

1999 IEEE Transmission and Distribution Conference (Cat. No. 99CH36333)

Year: 1999 | Volume: 2 | Conference Paper |

Enhanced double circuit line protection

P.G. McLaren;I. Fernando;H. Liu;E. Dirks;G.W. Swift;C. Steele

IEEE Transactions on Power Delivery

Year: 1997 | Volume: 12, Issue: 3 | Journal Article |

Cited by: Papers (41)

This paper describes a double circuit line protection relay which has all 6 line currents and voltages available for processing. This allows several alterations to the standard 3-phase distance package which enhance the performance of the protection system. Results are presented for the relay fed with simulated waveforms from a Playback Simulator. The system used in the simulations is modelled on ...Show More

Enhanced double circuit line protection

P.G. McLaren;I. Fernando;H. Liu;E. Dirks;G.W. Swift;C. Steele

IEEE Transactions on Power Delivery

Year: 1997 | Volume: 12, Issue: 3 | Journal Article |

An accurate software model for off-line assessment of a digital relay

P.G. McLaren;E.N. Dirks;R.P. Jayasinghe;I. Fernando;G.W. Swift;Z. Zhang

Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering

Year: 1996 | Conference Paper |

A software model of a digital power system protection relay is added to an offline emtp (EMTDC) and is then subjected to the same waveforms as the actual relay. Its performance is measured against the performance of the actual relay and the accuracy of the model is assessed.Show More

An accurate software model for off-line assessment of a digital relay

P.G. McLaren;E.N. Dirks;R.P. Jayasinghe;I. Fernando;G.W. Swift;Z. Zhang

Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering

Year: 1996 | Volume: 2 | Conference Paper |

Enhanced double circuit line protection

P.G. McLaren;I. Fernando;H. Liu;E. Dirks;G.W. Swift

Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering

Year: 1996 | Conference Paper |

Cited by: Papers (1)

This paper describes a double circuit line protection relay which has all 6 line currents and voltages available for processing. Results are presented for the relay fed with simulated waveforms from a Playback Simulator. The system used in the simulations is modelled on a 69 kV parallel line in the Winnipeg Hydro network.Show More

Enhanced double circuit line protection

P.G. McLaren;I. Fernando;H. Liu;E. Dirks;G.W. Swift

Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering

Year: 1996 | Volume: 1 | Conference Paper |

An accurate software model for off-line assessment of a digital relay

P.G. McLaren;E.N. Dirks;R.P. Jayasinghe;I. Fernando;G.W. Swift;Z. Zhang

IEEE WESCANEX 95. Communications, Power, and Computing. Conference Proceedings

Year: 1995 | Conference Paper |

Cited by: Papers (2)

A software model of a digital power system relay is added to an offline EMTP (EMTDC) and is then subjected to the same waveforms as an actual relay. Its performance is measured against the performance of the actual relay and the accuracy of the model is assessed.Show More

An accurate software model for off-line assessment of a digital relay

P.G. McLaren;E.N. Dirks;R.P. Jayasinghe;I. Fernando;G.W. Swift;Z. Zhang

IEEE WESCANEX 95. Communications, Power, and Computing. Conference Proceedings

Year: 1995 | Volume: 1 | Conference Paper |

A new positive sequence directional element for numerical distance relays

P.G. McLaren;G.W. Swift;Z. Zhang;E. Dirks;R.P. Jayasinghe;I. Fernando

IEEE WESCANEX 95. Communications, Power, and Computing. Conference Proceedings

Year: 1995 | Conference Paper |

Cited by: Papers (2)

This paper describes a new positive sequence directional element for use in numerical distance relays. Results are shown for the performance of the element in relays on the Manitoba Hydro network during disturbances and from tests on the Real Time Digital Simulator (RTDS) in the Power Systems Laboratory at the University of Manitoba.Show More

A new positive sequence directional element for numerical distance relays

P.G. McLaren;G.W. Swift;Z. Zhang;E. Dirks;R.P. Jayasinghe;I. Fernando

IEEE WESCANEX 95. Communications, Power, and Computing. Conference Proceedings

Year: 1995 | Volume: 2 | Conference Paper |

A new directional element for numerical distance relays

P.G. McLaren;G.W. Swift;Z. Zhang;E. Dirks;R.P. Jayasinghe;I. Fernando

IEEE Transactions on Power Delivery

Year: 1995 | Volume: 10, Issue: 2 | Journal Article |

Cited by: Papers (64) | Patents (4)

This paper describes a new positive sequence directional element for use in numerical distance relays. The element is incorporated in a numerical relay and the relay is tested on a RTDS (real time digital simulator). Results are also shown from on-line tests in two different locations in the Manitoba Hydro network. Finally an accurate software model of the relay, proved against recorded performanc...Show More

A new directional element for numerical distance relays

P.G. McLaren;G.W. Swift;Z. Zhang;E. Dirks;R.P. Jayasinghe;I. Fernando

IEEE Transactions on Power Delivery

Year: 1995 | Volume: 10, Issue: 2 | Journal Article |

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