British Columbia Transmission Corporation

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The British Columbia Transmission Corporation was a Crown corporation in the province of British Columbia, Canada.Its mandate is to plan, build, operate and maintain B.C.'s electricity transmission system. Wikipedia.


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Wang Y.,University of Alberta | Pordanjani I.R.,University of Alberta | Li W.,Harbin Institute of Technology | Xu W.,University of Alberta | And 3 more authors.
IEEE Transactions on Power Systems | Year: 2011

This paper reveals that the impedance match (or the Thevenin circuit) based voltage stability monitoring techniques have problems to predict voltage stability limits when applied to multi-load power systems. Power system loads are nonlinear and dynamic. They cannot be simply represented as Thevenin circuit parameters for impedance match analysis. To overcome these difficulties, a new concept called "coupled single-port circuit" is proposed in this paper. The concept decouples a meshed network into individual single generator versus single bus network and, as a result, a modified version of the impedance match theorem can be used. This leads to a real-time voltage stability monitoring scheme without the need to estimate Thevenin parameters. The scheme can estimate voltage stability margin and identify weak areas in a system based on the SCADA and PMU data. Case studies conducted on several test systems have verified the validity of the proposed method. © 2006 IEEE.


Yan W.,Chongqing University of Technology | Wen L.,Chongqing Electric Power Research Institute | Li W.,British Columbia Transmission Corporation | Chung C.Y.,Chongqing University of Technology | And 2 more authors.
International Journal of Electrical Power and Energy Systems | Year: 2011

A decomposition-coordination interior point method (DIPM) is presented and applied to the multi-area optimal reactive power flow (ORPF) problem in this paper. In the method, the area distributed ORPF problem is first formed by introducing duplicated border variables. Then the nonlinear primal dual interior point method (IPM) is directly applied to the distributed ORPF problem in which a Newton system with border-matrix-blocks is formulated. Finally the overall ORPF problem is solved in decomposition iterations with the Newton system being decoupled. The proposed DIPM inherits the good performance of the traditional IPM with a feature appropriate for distributed calculations among multiple areas. It can be easily extended to other distributed optimization problems of power systems. Numeric results of five IEEE Test Systems are demonstrated and comparisons are made with those obtained using the traditional auxiliary problem principle (APP) method. The results show that the DIPM for the multi-area OPRF problem requires less iterations and CPU time, has better stability in convergence, and reaches better optimality compared to the traditional auxiliary problem principle method. © 2010 Elsevier Ltd. All rights reserved.


Huang M.,Chongqing University of Technology | Li W.,British Columbia Transmission Corporation | Yan W.,Chongqing University of Technology
Electric Power Systems Research | Year: 2010

A new method to estimate the parameters of a synchronous generator using the square-root unscented Kalman filter (SRUKF) is presented in the paper. A third-order model for the parameter estimation of both round rotor and salient generators is developed first and then the SRUKF method is applied to the thirdorder model to perform the joint estimation of state variables and unknown generator parameters. The simulation results on a test system demonstrated the effectiveness of the proposed method in parameter recognition of a synchronous generator. The estimation processes of generator parameters steadily converge to the estimated values whereas the estimation processes of state variables are consistent with the dynamic responses in the numerical simulations. © 2010 Published by Elsevier B.V. All rights reserved.


Montambault S.,Hydro - Quebec | Pouliot N.,Hydro - Quebec | Toth J.,British Columbia Transmission Corporation | Spalteholz B.,BC Hydro
Proceedings - IEEE International Conference on Robotics and Automation | Year: 2010

This video summarizes a breakthrough in the emerging field of transmission line inspection and maintenance robots. Collaboration between electric utilities recently led to a robotic inspection of a large ocean inlet crossing transmission line, performed by LineScout Technology. Key challenges associated with the live line inspection and crossing of the suspension clamp are presented. Some of the findings revealed along the spans are shown. The accompanying paper also discusses some of the features of the robotic system that were found essentials for the success of the task. ©2010 IEEE.


Wang Y.,University of Alberta | Pordanjani I.R.,University of Alberta | Li W.,University of Alberta | Xu W.,University of Alberta | Vaahedi E.,British Columbia Transmission Corporation
IET Generation, Transmission and Distribution | Year: 2011

This study presents a practical approach for determining the best location and the minimum amount of the load to be shed for the event-driven-based load shedding schemes. In order to find the above key parameters, a non-linear optimisation problem needs to be solved. A multistage method is proposed to solve this non-linear problem. The main idea of this method is to solve the optimisation problem stage by stage and to limit the load shedding to a small amount at each stage. Using this approach, the non-linear optimisation problem will be converted into a series of linear optimisation problems. By solving these linear optimisation problems stage by stage, the optimal solution to the original non-linear problem is obtained. Furthermore, in order to quickly identify the candidate load shedding locations in the multistage method, a novel multiport network model is proposed. Based on the multiport network model, fast ranking of the load locations and of the generators' participation factors can be done with little calculation efforts. Details of the problem formulation and the solution strategy are presented here. The proposed strategy is illustrated and verified by using the IEEE 14-bus system, IEEE 118-bus system and a real 2038-bus power system. © 2011 The Institution of Engineering and Technology.


Xu W.,University of Alberta | Pordanjani I.R.,University of Alberta | Wang Y.,University of Alberta | Vaahedi E.,British Columbia Transmission Corporation
IEEE Transactions on Smart Grid | Year: 2012

It is well known that a power network can be represented as a multinode, multibranch Thevenin circuit connecting loads to generators. This paper shows that eigen-decomposition can be performed on the Thevenin impedance matrix, creating a set of decoupled single-node, single-branch equivalent circuits. The decoupled circuits can reveal important characteristics of a power system. By applying the transform to calculated or measured voltage phasor data, a technique for tracking the modes of voltage collapse and for identifying areas vulnerable to voltage collapse has been developed. Case studies conducted on multiple power systems have confirmed the effectiveness of the proposed method. In addition to voltage stability applications, the proposed transform presents a new approach for processing and interpreting multilocation phasor data. © 2011 IEEE.


Wang Y.,Chongqing University | Li W.,British Columbia Transmission Corporation | Lu J.,Chongqing University
IEEE Transactions on Power Delivery | Year: 2010

As a key technology in smart grid, the wide-area measurement system (WAMS) will gradually become an important guarantee for security and stability of future power systems. This paper presents a quantified reliability evaluation method for the backbone communication network in WAMS and the overall WAMS from a hardware reliability viewpoint. The whole WAMS is modeled using a hierarchical structure. Markov modeling and state enumeration techniques are combined to perform the reliability evaluation. The WAMS in the IEEE 14bus system is used as an example to demonstrate the application of the presented method in reliability assessment of overall WAMS. © 2010 IEEE.


Zhang P.,British Columbia Transmission Corporation | Li W.,British Columbia Transmission Corporation
IEEE Transactions on Power Systems | Year: 2010

This paper proposes a boundary analysis method for reliability and economic assessment in distribution systems. The main purpose is to deal with uncertainties of input data, especially when statistical information is unavailable or insufficient. The presented method uses interval numbers to enclose variability and incertitude in reliability and economic parameters, and provides the estimates on upper and lower bounds of reliability and economic indices. The proposed method has been applied to real-life distribution reinforcement projects. Case studies demonstrated effectiveness and efficiency of the method. © 2010 IEEE.


Xie K.,Chongqing University | Jiang Z.,Chongqing University | Li W.,British Columbia Transmission Corporation
IEEE Transactions on Energy Conversion | Year: 2012

Wind turbine power converter system (WTPCS) is a crucial device in a wind energy conversion system. This paper presents the new failure rate models and a reliability evaluation technique for the (WTPCS) considering effects of wind speeds, which can be named by the multistate probability analysis method. The case studies on the WTPCS of a 2 MW wind turbine with a permanent magnet synchronous generator are conducted using wind speed data at Lauwersoog and Valkenburg wind sites in Holland. The results indicate that reliability of the WTPCS is affected significantly by variations of wind speed and the rated wind speed of wind turbine. The effectiveness of the proposed method is demonstrated by examples. © 2011 IEEE.


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British Columbia Transmission Corporation | Date: 2017-01-10

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