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University of Manitoba

1. Vaid, Rajesh. Design and stability analysis of a robust wide-area measurement based damping controller for multiple HVDC systems.

Degree: Electrical and Computer Engineering, 2018, University of Manitoba

The presence of low-frequency oscillations in the power system network is a cause of concern. If such oscillations are not suitably damped then they can lead to catastrophic events in the power system. The issue of providing adequate damping for such oscillations has been approached in ways ranging from the use of local signals e.g rotor angle, machine speed to tune power system stabiliser, to development of power oscillation damping controllers that utilise line current, line voltage signals from special equipment (e.g. Flexible AC Transmission). The power network has embedded High Voltage DC (HVDC) transmission system and some power oscillation damping controllers make use of this resource to address the issue. The advent of Wide-Area Measurement Systems (WAMS) has enabled the use of remote system-wide information to enhance controllability of critical parameters and improve the stability of the overall system. This thesis investigates the use of such system-wide information to synthesise a feedback signal to impart damping to critical swing-modes. This research demonstrates that the use of selected system-wide information along with local signals result in a robust controller, whose performance does not deteriorate when the communication channel fails. The proposed controller utilises the concept of increasing the separation between the closed-loop poles and open-loop zeros, which leads to an increased range of controller gains to improve damping. This controller can be an add-on control module in the existing control system of the High Voltage DC transmission (HVDC) links. The research also demonstrates that varying damping controller gains beyond a given value adversely impact system stability, which is due to an adverse interaction between the damping controller and the Voltage Source Converter (VSC) HVDC system. This instability can be accurately captured through electromagnetic transient simulation, rather than the linearised model of the system largely due to the simplification of HVDC system in transient stability simulation. The justification for the proposed controller design is provided using eigenvalue sensitivity analysis. The frequency scanning based Nyquist analysis corroborates the occurrence of damping controller gain related system instability. Advisors/Committee Members: Gole, Aniruddha (Electrical and Computer Engineering) (supervisor), Pathirana, Vajira (Electrical and Computer Engineering), Woodford, Dennis (Electrical and Computer Engineering) (guestmembers).

Subjects/Keywords: Damping controller; System stability; VSC-HVDC; EMT simulation; Frequency scanning technique; Nyquist Analysis

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Vaid, R. (2018). Design and stability analysis of a robust wide-area measurement based damping controller for multiple HVDC systems. (Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/32937

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Vaid, Rajesh. “Design and stability analysis of a robust wide-area measurement based damping controller for multiple HVDC systems.” 2018. Thesis, University of Manitoba. Accessed November 17, 2019. http://hdl.handle.net/1993/32937.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Vaid, Rajesh. “Design and stability analysis of a robust wide-area measurement based damping controller for multiple HVDC systems.” 2018. Web. 17 Nov 2019.

Vancouver:

Vaid R. Design and stability analysis of a robust wide-area measurement based damping controller for multiple HVDC systems. [Internet] [Thesis]. University of Manitoba; 2018. [cited 2019 Nov 17]. Available from: http://hdl.handle.net/1993/32937.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Vaid R. Design and stability analysis of a robust wide-area measurement based damping controller for multiple HVDC systems. [Thesis]. University of Manitoba; 2018. Available from: http://hdl.handle.net/1993/32937

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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