TransGrid Solutions Inc.

Winnipeg, Canada

TransGrid Solutions Inc.

Winnipeg, Canada

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Suriyaarachchi D.H.R.,University of Manitoba | Annakkage U.D.,University of Manitoba | Karawita C.,TransGrid Solutions Inc. | Kell D.,TransGrid Solutions Inc. | And 2 more authors.
IEEE Power and Energy Society General Meeting | Year: 2012

This paper demonstrates that wind farms connected to a grid through a series compensated transmission line may exhibit sub-synchronous oscillations. It is shown that the flux in the stator winding and the currents in the transmission line are the major participants of this mode. Dynamic Phasors are used to model the small signal model of the transmission network so that the network is accurately represented at sub-synchronous frequencies. An SVC is used to introduce damping to this oscillation mode, with line current as the feedback signal. The application is demonstrated for a large practical power system. © 2012 IEEE.


Brandt R.,TransGrid Solutions Inc. | Kuffel P.,Hatch Ltd. | Thomas P.,Newfoundland and Labrador Hydro
IEEE PES General Meeting, PES 2010 | Year: 2010

A system integration study was undertaken to evaluate the feasibility of a three-terminal HVdc system linking Labrador, Newfoundland and New Brunswick, a component of the Lower Churchill Project. The main focus was the impact of the HVdc system on the Newfoundland Island Interconnected system, a system that is currently electrically isolated from the North American grid. The 800 MW HVdc terminal on the Island system would normally serve as an infeed of power, at times supplying nearly half of the Island load. The main technical challenge was the ac system frequency decay and transient undervoltages that resulted during the temporary loss of the HVdc infeed (due to commutation failure) coupled with a disruption of generation on the Island due to an ac system fault. Mitigation measures studied included reducing the likelihood of commutation failure of the Island HVdc converter and increasing the inertia of the Island system. Preliminary investigations of the performance of a Voltage Source Converter (VSC) HVdc terminal were also undertaken. ©2010 IEEE.


News Article | December 22, 2016
Site: www.prnewswire.co.uk

According to Future Market Insights' report titled "High Voltage Direct Current (HVDC) Transmission System Market: Global Industry Analysis and Opportunity Assessment 2016-2026," the global market for high voltage direct current transmission systems, which is now valued at US$ 6,191.8 Mn, is likely to reach US$ 14.36 Bn in market value by the end of 2026 - attaining expansion at a CAGR of 8.8%. According to the report, North America, Western Europe and Asia Pacific excluding Japan (APEJ) are the leading markets for HVDC transmission systems globally. Key market players include ABB Ltd., TransGrid Solutions Inc., Siemens AG, Prysmian SpA, Toshiba Corporation, General Electric Co., Hitachi Ltd., Abengoa SA, and ATCO Electric Ltd. Key Research Findings from Future Market Insights' Report on the Global HVDC Transmission System Market HVDC transmission is expected to become more efficient due to rampant popularity of advanced valve components such as insulated gate bipolar transistors (IGBT). Several such components that avert transmission failures can be categorised under the solution-based components. By 2026, global revenue share of such components is forecast to be about 60%, while revenues from sales of service-based HVDC transmission components will incur rapid growth at a 10.5% CAGR. According to a comprehensive cost analysis in the research report, high installation costs are a major drawback for adoption of high-voltage direct current over other electric transmission systems. HVDC transmission components are expensive and need to be replaced if damaged. With respect to deployment of HVDC transmission systems, subsea deployment is expected to gain adoption due to its comparatively lower installation cost and a rise in demand for offshore power distribution. By 2026, the 33% market value share attributed by overhead deployment model is likely to marginally surpass subsea deployment's share by 5 percent or less. Preview Analysis on Global High Voltage Direct Current (HVDC) Transmission System Market Segmentation By System Component - Solutions (AC & DC Harmonic Filters, Converters, DC Lines, Circuit Breakers and Others), Services; By Technology - LCC, VSC and Others; By Deployment - Overhead, Underground, Subsea and Combination; By Power Rating - Below 1000 Mws, 1001 To 2000 Mws and 2001 Mws & Above: http://www.futuremarketinsights.com/reports/high-voltage-direct-current-hvdc-transmission-systems-market Manufacturers of HVDC systems incur a competitive edge in the power supply industry as these systems provide efficient transmission with optimal electricity consumption. To extend the environmental impact of HVDC transmission systems, manufacturers are adopting renewable or "clean" energy for transmission and reducing pollution arising from unwanted electromagnetic energy emanating from electrical lines. In the power distribution industrial sector, managing the impact of energy transmission on the environment is now being considered with an utmost regard. A recent update on companies and governments undertaking steadfast measures on clean energy includes the approval of the US Department of Justice for the installation of a 3GW HVDC transmission system for the country's TransWest Express Transmission Project. A power ratings analysis included in the report indicates that power distribution above 2,000 MWs will witness a rise in market value share, accounting for nearly 40% of the global HVDC transmission system market value by the end of 2026. Owing to such power consumption trends, companies such as General Electric Co. and ABB Ltd. among others, have included Ultra high-voltage direct current (HVDC) transmission systems as part of their original offerings. Speak with Analyst for any Report Related Quires: http://www.futuremarketinsights.com/askus/rep-gb-1209 Lack of proficient engineers to effectively operate as well as maintain HVDC transmission systems remains a longstanding challenge. Prominence of line-commutated converter (LCC) and voltage-source converter (VSC) technologies further necessitates the need for highly-qualified engineers. Comparatively, by the end of 2026, VSCs will be the dominant technology in the global market, accounting for nearly US$ 9 Bn in revenues. Future Market Insights (FMI) is a leading market intelligence and consulting firm. We deliver syndicated research reports, custom research reports and consulting services which are personalized in nature. FMI delivers a complete packaged solution, which combines current market intelligence, statistical anecdotes, technology inputs, valuable growth insights and an aerial view of the competitive framework and future market trends.


Arunprasanth S.,University of Manitoba | Annakkage U.D.,University of Manitoba | Karawita C.,TransGrid Solutions Inc. | Kuffel R.,RTDS Technologies Inc.
IEEE Transactions on Power Delivery | Year: 2016

This paper proposes a robust frequency-domain method to tune the d-q decoupled control system used in Modular Multilevel Converter-type Voltage Source Converter (MMC-VSC) systems. A linearized state-space model of the MMC-VSC system is developed and used to calculate the stability-related frequency-domain attributes. The controller design problem is formulated as an optimization problem. In this paper, the simulated annealing optimization technique is applied to find the proportional-integral (PI) controller parameters that give desired damping for the oscillatory modes and desired values for decaying exponential modes. The efficacy of this method is tested on the electromagnetic transient model of a two-terminal MMC-VSC system on the real-time digital simulators, and the results are provided in this paper. Finally, tuned controller parameters for different ac system strengths are discussed and it is shown that this mathematical model is suitable to tune the PI-controller parameters for MMC-VSC systems connected to strong as well as weak ac networks. © 2015 IEEE.


Nayak R.N.,Power Grid Corporation of India | Sasmal R.P.,Power Grid Corporation of India | Sehgal Y.K.,Power Grid Corporation of India | Rashwan M.,Transgrid Solutions Inc. | Flisberg G.,ABB
43rd International Conference on Large High Voltage Electric Systems 2010, CIGRE 2010 | Year: 2010

There is considerable experience on 500/600 kV dc system available world wide and lot of learning's are also available now during development and recent operation of 800kV dc system. During 1970's and 80's, anticipating the next stage of high power HVDC transmission, considerable studies and field tests pertaining to Corona Studies, Insulation System Insulator Pollution Tests etc was taken up by EPRI/ other international institutions up to ±1200kV dc system. However, due to saturation of load growth, further Research and Development in Ultra High Voltage (UHV) area were slowed down or virtually stopped. With high surge of Energy requirement of geographically large countries coupled with large population and steep economic development in countries like China, India, Brazil and Africa etc, the situation has changed and these developing countries have shown high interest for harnessing remote hydro resources. This necessitates large transmission systems with UHV dc and ac to transmit large block of power to a distant load centre. It is a fact that dc phenomena is complex and different than UHV ac in regard to it's pollution performance, reliability of converter transformers, harmonics, ground return mode operation etc. The existing knowledge of electrical withstand in air, oil and other materials for voltages 2000-3000 kV is not enough neither for AC, DC, lightning or switching impulse, particularly not at high altitudes(2000-4000m) where some of the future potential transmissions are going to be built However, thanks to the ongoing development of better insulating materials for pollution, super thermal upgraded papers for transformer insulation, better quality transformer oils, split air core reactors, high energy capability surge arrestors and technology up gradation in civil engineering for cheaper in door switch yard etc which may facilitate 1000kV development. This paper elaborates in a feasibility study for a transmission at 1000 kV dc or above and identification areas of R&D: • Increased use of renewable hydro power resources of about 20,000-40,0000 MW in an area located 2000-4000 km from load centers calls for power transmissions capable of carrying 6000 -10000 MW of power. Such need clearly makes the use of 1000-1200 kV interesting to consider. • HVDC terminal configuration or large modern networks need to be suitably designed to sustain a loss of power carried by such high capacity transmission. • The stresses on the environment from the overhead line like external insulation, audible noise, electric and magnetic field need to be properly considered though effect of electric & magnetic field. • The major challenge in converter station design is insulation co-ordination, clearances and reliability of converter transformer. • The requirements on increased insulation clearance on equipment results in increased dimensions which in turn makes the mechanical design of the equipment more difficult and transportation of converter transformers becomes a huge challenge though it can be partly handled through configuration and also indoor switch yard etc.


Dissanayaka A.,University of Manitoba | Annakkage U.D.,University of Manitoba | Jayasekara B.,TransGrid Solutions Inc. | Bagen B.,Manitoba Hydro
IEEE Transactions on Power Systems | Year: 2011

This paper presents a linearized technique to determine a risk-based index for dynamic security. The method is an extension to an existing technique in which the risk of steady state security is calculated using the mean and variance of load uncertainty. The proposed method is applied to calculate the risk indices for the IEEE New England 39-bus test system. The results obtained from the proposed method are validated against those estimated by Monte Carlo simulation. Both approaches produce virtually the same results for small load deviations. © 2011 IEEE.


Pham J.-P.,University of Manitoba | Denboer N.,TransGrid Solutions Inc. | Lidula N.W.A.,University of Manitoba | Perera N.,University of Manitoba | Rajapakse A.D.,University of Manitoba
2011 IEEE Electrical Power and Energy Conference, EPEC 2011 | Year: 2011

A pattern classification technique for fast detection of power islands in a distribution network is implemented and tested. It utilizes voltage and current transient signals generated during an islanding event to detect the formation of the island. A Decision Tree classifier is trained to categorize the transient generating events as 'islanding' or 'non-islanding'. It involves two basic stages of signal processing to extract the required feature vectors for the classification. The first stage involves signal filtering and in the second stage signals are processed by rectifying, summing, and low-pass filtering to get the energy content in the three phases during a selected time-frame. Analog filters, rectifiers, adders and micro-controllers complete the implementation. The performance of the design was tested with signals generated using a real-time waveform playback instrument. A simple radial medium voltage distribution system with single distributed generator was simulated in PSCAD/EMTDC to obtain the transient waveforms. The experimental and simulation results give comparable results showing high accuracy in detecting islanding events very fast. © 2011 IEEE.


Karawita C.,Transgrid Solutions Inc. | Annakkage U.D.,University of Manitoba
IET Conference Publications | Year: 2010

A linearized model of an HVDC system is presented in a control block diagram form. The converter models (rectifier and inverter), DC transmission system, phase lock oscillators (PLOs) and the HVDC controllers are included. The control block diagram model of HVDC system simplifies, in understanding and modelling, the complex operation of the HVDC system. The model can be used in small signal stability assessment to analyze subsynchronous frequency HVDC interactions such as generator-turbine torsional interactions. Furthermore, the model can be easily implemented in a software environment such as Simulink for response analysis, control tuning and other educational purposes.


Suriyaarachchi D.H.R.,University of Manitoba | Annakkage U.D.,University of Manitoba | Karawita C.,Trans Grid Solutions Inc. | Jacobson D.A.,Manitoba Hydro
IEEE Transactions on Power Systems | Year: 2013

This paper presents a comprehensive analysis of sub-synchronous interactions in a wind integrated power system to understand and mitigate them. The proposed procedure has two steps. In the first step, a frequency scan is performed to determine the presence of resonant frequencies in the sub-synchronous range. In the second step, a detailed small signal analysis is performed. Participation factors are used to identify the state variables that are involved in the interaction, and the controllability indices are used to determine the mitigation method. It is shown that the sub-synchronous interaction present in Type 3 wind turbine-generators connected to the grid through series compensated lines is an electrical resonance between the generator and the series compensated line which is highly sensitive to the rotor side converter current controller gains. © 1969-2012 IEEE.


Jacobson D.A.N.,Manitoba Hydro | Wang P.,Manitoba Hydro | Mohaddes M.,TransGrid Solutions Inc. | Rashwan M.,TransGrid Solutions Inc. | Ostash R.,TransGrid Solutions Inc.
2011 IEEE Electrical Power and Energy Conference, EPEC 2011 | Year: 2011

Due to the fast-growing presence of VSC technology on the market and advancements including reduced losses, ability to operate at higher currents and using overhead lines, preliminary studies were undertaken to evaluate the feasibility of using VSC technology for the third HVdc Bipole III planned for Manitoba. Manitoba currently has two conventional LCC HVdc Bipoles I and II. Studies showed a VSC link to be technically feasible for Bipole III and would likely eliminate the need for 1000 MVA of new synchronous condensers. In comparison to a conventional LCC link, a VSC link showed improvement in system performance, particularly for frequency dips, during remote faults in the southern system (at the inverter end). Worse performance was noted for VSC DC overhead line faults, but results were still within the system acceptance criteria. A brief look at replacing Bipoles I and II with VSC technology also showed promising results, with the likelihood of being able to retire some of the existing synchronous condensers currently needed at the inverters. The nature of the results warrants future study and consideration of VSC technology for HVdc transmission in Manitoba. © 2011 IEEE.

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