T.S. Sidhu

University of Moratuwa, Moratuwa, Western Province, Sri Lanka

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Publications (188)159.6 Total impact

  • M. Elsamahy, S.O. Faried, T.S. Sidhu
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    ABSTRACT: This paper explores the impact of a transmission-line midpoint STATCOM on the performance of the generator loss-of-excitation (LOE) protection. In this context, investigations are conducted on a two-hydrogenerator power station for two LOE contingencies, namely, a complete LOE due to a field-winding short circuit and a partial LOE due to a sudden drop in the excitation voltage at different generator loadings. The results of these investigations show that the midpoint STATCOM has adverse impacts on the LOE distance relay in the form of delay time and/or underreach phenomenon. These adverse impacts vary with the generator loading and the LOE mode. The time-domain simulation studies are conducted using PSCAD/EMTDC software.
    IEEE Transactions on Power Delivery 01/2014; 29(2):724-732. · 1.52 Impact Factor
  • M.A. Zamani, T.S. Sidhu, A. Yazdani
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    ABSTRACT: With the increasing attention to the concept of microgrids, it has become important to identify the requirements that enable an electric distribution network to operate as a microgrid. This paper studies a realistic distribution network to accomplish the following: 1) determine the conditions under which the network can operate as a microgrid and 2) present the control scenarios that allow the islanded operation of the network. In particular, the employment of electronically coupled distributed energy resources with the fault-ride-through and synchronization capabilities is investigated. Another objective of this paper is to propose practical protection strategies that are effective in both operational modes of a microgrid (i.e., the grid-connected mode and the islanded mode), considering the system constraints; the protection strategies provide the microgrid with acceptable reliability against different fault scenarios. The effectiveness of the control and protection strategies is demonstrated and discussed through a comprehensive set of simulation studies conducted in the PSCAD/EMTDC software environment.
    IEEE Transactions on Industrial Electronics 01/2014; 61(4):1904-1915. · 6.50 Impact Factor
  • P.P. Parikh, T.S. Sidhu, A. Shami
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    ABSTRACT: Today's power grid is facing many challenges due to increasing load growth, aging of existing power infrastructures, high penetration of renewable, and lack of fast monitoring and control. Utilizing recent developments in Information and Communication Technologies (ICT) at the power-distribution level, various smart-grid applications can be realized to achieve reliable, efficient, and green power. Interoperable exchange of information is already standardized in the globally accepted smart-grid standard, IEC 61850, over the local area networks (LANs). Due to low installation cost, sufficient data rates, and ease of deployment, the industrial wireless LAN technologies are gaining interest among power utilities, especially for less critical smart distribution network applications. Extensive work is carried out to examine the wireless LAN (WLAN) technology within a power distribution substation. The first phase of the work is initiated with the radio noise interference measurements at 27.6- and 13.8-kV distribution substations, including circuit breaker switching operations. For a detailed investigation, the hardware prototypes of WLAN-enabled IEC 61850 devices are developed using industrial embedded systems, and the performance of smart distribution substation monitoring, control, and protection applications is analyzed for various scenarios using a round trip-time of IEC 61850 application messages. Finally, to examine the real-world field performance, the developed prototype devices are installed in the switchyard and control room of 27.6 power distribution substation, and testing results of various applications are discussed.
    IEEE Transactions on Industrial Informatics 01/2013; 9(3):1466-1476. · 8.79 Impact Factor
  • Il-Hyung Lim, T.S. Sidhu
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    ABSTRACT: The IEC 61850-based substation automation system (SAS) provides opportunities for a new level of substation operation, enhancing operating efficiency and protection reliability with a new environment based on an Ethernet-based communication network and high-performance intelligent electronic devices (IEDs). With these changes, importance and dependence on IEDs are increasing rapidly in IEC 61850-based substations. While consideration of protection device faults has so far been infrequent, IED faults will become increasingly important in the future. Thus, this paper proposes a design of a backup IED for protection IED faults in IEC 61850-based substations. The proposed backup IED can be remotely converted into any type of protection IED without IED exchange, firmware update, or field control. The backup IED was designed through SCL engineering and file transfer functions in IEC 61850 and implemented by Windows programming with a commercially available IEC 61850 library.
    IEEE Transactions on Power Delivery 01/2013; 28(4):2048-2055. · 1.52 Impact Factor
  • M.A. Zamani, A. Yazdani, T.S. Sidhu
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    ABSTRACT: This paper proposes an enhanced control strategy for electronically coupled distributed energy resources that improves the performance of the host microgrid under network faults and transient disturbances. The proposed control strategy does not require controller mode switchings and enables the electronically coupled distributed energy resources to ride through network faults, irrespective of whether they take place within the host microgrid or impact the upstream grid. Moreover, the proposed control ensures acceptable power quality for the duration of the faults, which is an important feature for protection against certain classes of faults, as well as for sensitive loads. Further, the paper proposes a supplementary control loop that improves the microgrid post-fault recovery. The effectiveness of the proposed control strategy is demonstrated through a comprehensive set of simulation studies, conducted in the PSCAD/EMTDC software environment.
    IEEE Transactions on Power Delivery 01/2012; 27(4):1737-1747. · 1.52 Impact Factor
  • M.A. Zamani, A. Yazdani, T.S. Sidhu
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    ABSTRACT: This paper proposes a communication-assisted protection strategy implementable by commercially available microprocessor-based relays for the protection of medium-voltage microgrids. Even though the developed protection strategy benefits from communications, it offers a backup protection strategy to manage communication network failures. The paper also introduces the structure of a relay that enables the proposed protection strategy. Comprehensive simulation studies are carried out to verify the effectiveness of the proposed protection strategy under different fault scenarios, in the PSCAD/EMTDC software environment.
    IEEE Transactions on Smart Grid 01/2012; 3(4):2088-2099.
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    ABSTRACT: Cyber security in interconnected smart grid is vital for reliability of power system operations. Power communication applications are different from cooperate information technology applications. Utilities that follow defense in depth strategy have to confront many network security technologies. This paper presents an application of IPSec tunnel in substation gateways. IPSec Encapsulating Security Payload (ESP) tunnels are selected for our experiments. Since security overhead of cyber security measures introduce additional delays, several performance tests are conducted on IPSec ESP tunnels. The results are used to determine the balance between security and performance of IPSec ESP tunnel on substation gateways.
    Information and Automation for Sustainability (ICIAfS), 2012 IEEE 6th International Conference on; 01/2012
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    ABSTRACT: This presentation will update a 2005 Power System Relaying Committee paper on protection issues during power system restoration [1]. The abstract of the original paper as follows is still applicable, but updates due to technological advances will be presented.
    Power and Energy Society General Meeting, 2012 IEEE; 01/2012
  • M. Elsamahy, S.O. Faried, T.S. Sidhu
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    ABSTRACT: In this paper, investigations are carried out to explore the impact of generator distance phase backup protection (Relay (21)) on the generator overexcitation thermal capability. These investigations have included the performance of Relay (21) when it is set to provide thermal backup for the generator during two common system disturbances, namely a system fault and a sudden application of a large system load while the overexcitation limiter (OEL) is in service. The results of these investigations have shown that the current setting of Relay (21) for generator thermal backup protection restricts the overexcitation thermal capability of the generator. Such a restriction does not allow the generator to supply its maximum reactive power during such events. The paper highlights the need for conducting in-depth dynamic stability studies to evaluate the existing setting of the generator distance phase backup protection relay in order to allow the generator to fulfill the system requirements during major disturbances to ensure adequate level of voltage stability.
    Electrical Power and Energy Conference (EPEC), 2012 IEEE; 01/2012
  • M. Sheikholeslamzadeh, T.S. Sidhu
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    ABSTRACT: This paper presents modeling and analysis of four passive relays used in distributed generation passive anti-islanding protection schemes. The passive Overcurrent (OC), OV/UV, OF/UF, and ROCOF (Rate of Change of Frequency) relays are commonly used for DG anti-islanding protection because of their low cost and relative simplicity. The relays modeling are based on the commercial digital relays hardware and considering Discrete Fourier Transform (DFT) as the phasor and frequency estimation algorithms in MATLAB environment. Then, the relay models are simulated on a practical radial distribution system embedding six-1.67 MW Doubly-Fed Induction Generators (DFIG) using PSCAD/EMTDC. The obtained results and analysis are reported and discussed. Finally, an intelligent scheme is suggested which takes advantage of an islanding-dedicated complementary system and improves the security of conventional ORed system of four relays.
    Electrical & Computer Engineering (CCECE), 2012 25th IEEE Canadian Conference on; 01/2012
  • M.A. Zamani, T.S. Sidhu, A. Yazdani
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    ABSTRACT: One of the major challenges associated with microgrid protection is to devise an appropriate protection strategy that is effective in the grid-connected as well as islanded mode of operation. This paper proposes a protection strategy based on microprocessor-based relays for low-voltage microgrids. Further, the structure of a new relay enabling the proposed protection strategy is presented. One of the salient feature of the developed protection scheme is that it does not require communications or adaptive protective devices. Moreover, it is to a large extent independent of the fault current magnitude and the mode of operation. Transient time-domain simulation studies are conducted to demonstrate the effectiveness of the proposed protection strategy and its enabling relay, using the PSCAD/EMTDC software package.
    IEEE Transactions on Power Delivery 08/2011; · 1.52 Impact Factor
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    ABSTRACT: In this paper, investigations are carried out to explore the impact of a midpoint static synchronous compensator (STATCOM) on the coordination between the generator distance phase backup protection (function 21) and the generator capability curves. The results of these investigations have shown that the midpoint STATCOM has an adverse effect on such coordination. Such an impact varies according to the fault type, the fault location, and the generator loading. This paper proposes the use of the support vector machines' classification technique for generator phase backup protection to enhance the coordination between such protection and generator capability curves in the presence of a midpoint STATCOM. The dynamic simulations of a test benchmark have been conducted by using the PSCAD/EMTDC software.
    IEEE Transactions on Power Delivery 08/2011; · 1.52 Impact Factor
  • M. Elsamahy, S.O. Faried, T.S. Sidhu
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    ABSTRACT: In this paper, investigations are carried out to explore the impact of superconducting fault current limiters installed in the transmission system on the coordination between the generator distance phase backup protection (function 21) and the generator capability curve. The results of these investigations have shown that both the resistive and inductive type superconducting fault current limiters have an adverse effect on this coordination. Such an impact varies according to the fault type, the fault location, and the generator loading. The dynamic simulations of a test benchmark have been conducted by using the PSCAD/EMTDC software.
    IEEE Transactions on Power Delivery 08/2011; · 1.52 Impact Factor
  • M.G. Kanabar, T.S. Sidhu
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    ABSTRACT: International Electrotechnical Commission (IEC) standard 61850 proposes the Ethernet-based communication networks for protection and automation within the power substation. Major manufacturers are currently developing products for the process bus in compliance with IEC 61850 part 9-2. For the successful implementation of the IEC 61850-9-2 process bus, it is important to analyze the performance of time-critical messages for the substation protection and control functions. This paper presents the performance evaluation of the IEC 61850-9-2 process bus for a typical 345 kV/230 kV substation by studying the time-critical sampled value messages delay and loss by using the OPNET simulation tool in the first part of this paper. In the second part, this paper presents a corrective measure to address the issues with the several sampled value messages lost and/or delayed by proposing the sampled value estimation algorithm for any digital substation relaying. Finally, the proposed sampled value estimation algorithm has been examined for various power system scenarios with the help of PSCAD/EMTDC and MATLAB simulation tools.
    IEEE Transactions on Power Delivery 05/2011; · 1.52 Impact Factor
  • M.R.D. Zadeh, T.S. Sidhu, A. Klimek
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    ABSTRACT: A directional comparison bus protection can provide a high-speed bus fault clearing in an IEC61850 process-bus environment. This technique is based on fault direction for each circuit connected to the protected bus. Compared to biased current differential protection, the loss of accurate time synchronisation of the individual merging units does not cause the bus protection based on directional comparison to lose security. The suitability of various practical directional techniques is investigated from the viewpoint of directional comparison bus protection for an IEC61850 process bus. A modification in the superimposed directional algorithm for bus protection is proposed to overcome the major problems resulted from breaker operations. As a part of this modification, a new technique is proposed to determine the bus voltage from feeder voltages to avoid the need for an additional three-phase CVT on the bus. PSCAD/EMTDC and MATLAB are utilised to simulate the power system and various directional algorithms, respectively. Results are reported and compared.
    IET Generation Transmission & Distribution 03/2011; · 1.41 Impact Factor
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    ABSTRACT: This paper evaluates the effectiveness of different commercial relay functions in a local passive anti-islanding process for a permanent-magnet synchronous generator (PMSG)-based wind farm which is interfaced with a radial distribution network. The results are obtained through a comprehensive set of real-time simulation studies, conducted on a detailed topological model of a single-machine equivalent of the PMSG-based wind farm and the network, using three different commercial relays. The paper introduces the study set-up and methodology and, additionally, details of the mathematical and simulation models of the PMSG-based wind farm. The models and the methodology presented in this paper can be used, directly or with minor modifications, for many other impact-assessment studies.
    IEEE Transactions on Power Delivery 02/2011; · 1.52 Impact Factor
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    ABSTRACT: This paper is about the development of a framework for the formal certification of software for masquerade detection based upon natural mimicry. A masquerade is when an intruder mimics a genuine user in order to compromise the security of a computer system. The framework consists of looking at mimicry in the natural world. Based on this, a model for mimicry is developed based on the principle of indiscernibility. This is followed by a look into the requirements for masquerade detection software. A formal model for an agent for masquerade detection is then derived which discerns the static attributes of the user as well as detects anomalies in the dynamic user behavior via a statistical classifier. This agent is then used for masquerade detection in the Human Machine Interface (HMI) of an industrial automation network.
    Information and Automation for Sustainability (ICIAFs), 2010 5th International Conference on; 01/2011
  • M.Amin Zamani, Amirnaser Yazdani, Tarlochan S. Sidhu
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    ABSTRACT: This paper studies a realistic utility distribution network that embeds distributed energy resources. The objectives are (1) to propose the apparatus and controls that enable the network to operate in isolation from the host power system, and (2) to propose a practical and simple protection strategy that is effective in both the grid-connected mode and the islanded mode. The effectiveness of the proposed control and protection strategies is demonstrated through simulation studies, conducted in the PSCAD/EMTDC software environment.
    Renewable Power Generation (RPG 2011), IET Conference on; 01/2011
  • Source
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    ABSTRACT: An iterative technique based on orthogonal filters and frequency tracking is proposed to estimate harmonic components in power systems. The technique uses frequency interpolation to estimate fundamental frequency and harmonics when the nominal frequency of the signal is a non-integer value. Due to the number of computations involved during the generation of filter coefficients, an offline computation is suggested. Beneficial features of the proposed technique include fixed sampling rate and fixed data window size. The performance of the proposed technique is examined by simulating different power system operating conditions and evaluating the data from these simulations. A technique based on Fast Fourier Transform is also used to estimate the harmonic components for all the simulated signals. These estimates are compared with those obtained from the proposed technique. Results show that the proposed technique can converge to the accurate fundamental frequency and therefore, provide accurate harmonic components even when the fundamental frequency is not equal to the nominal frequency.
    Journal of Electrical Engineering and Technology 01/2011; 6(3). · 0.73 Impact Factor
  • Zhihan Xu, Tarlochan S. Sidhu
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    ABSTRACT: The fault location in underground cables is charac- terized as the technical difficulties due to complexities in cables. Based on the direct circuit analysis, a fault location algorithm for underground cables with no laterals is presented in this paper. The single-end phasor measurements, including the voltages and cur- rents sampled in the substation side, are utilized to locate the single phase faults in the typical single-conductor cross-linked polyeth- ylene (XLPE) cables rated at the medium voltage (MV) levels. The distinctive cable characteristics are considered, such as relatively large capacitance, effects of sheaths and sheath bonding methods. The different fault scenarios are taken into account as well. The effect of changes of cable parameters and application of static re- sponse load model are also investigated. The simulation studies demonstratetheproposed algorithmcanachievethehighaccuracy under various system and fault conditions.
    IEEE Transactions on Power Delivery 01/2011; 26(4):2845-2854. · 1.52 Impact Factor

Publication Stats

1k Citations
159.60 Total Impact Points

Institutions

  • 2010–2011
    • University of Moratuwa
      • Department of Electronic and Telecommunication Engineering
      Moratuwa, Western Province, Sri Lanka
  • 2002–2011
    • The University of Western Ontario
      • Department of Electrical and Computer Engineering
      London, Ontario, Canada
  • 2006
    • Sharif University of Technology
      • Department of Electrical Engineering
      Tehrān, Ostan-e Tehran, Iran
  • 1989–2005
    • University of Saskatchewan
      • Department of Electrical and Computer Engineering
      Saskatoon, Saskatchewan, Canada
  • 1996
    • University of Manitoba
      Winnipeg, Manitoba, Canada