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Bulk Abstract-As a consequence of the fast development of renewable energy sources in the UK, higher transmission capacity will be required to integrate potentially large volumes of wind generation in the future. Also, over the next decade, maintaining the transmission system security and stability will become more difficult. A major increase in the application of HVDC transmission technology and the deployment of series compensation within the existing AC transmission system is expected to provide the required transfer capability in the future. However, there is also a need to employ smarter ways of operating these power flow control devices. Firstly, this paper investigates the capability of the HVDC link in improving the inter-area power oscillation damping. Two approaches in the design of power oscillation damping controller are demonstrated. Secondly, the paper presents the application of the HVDC links set-point adoption for the stability enhancement through a novel non-parametric control system design approach using the sample regulator control design method. This method is mainly attractive for applications in large integrated power systems since the controller design only requires knowledge of the nonparametric model of the power system i.e. the open-loop step response, which is easily obtainable compared to development of parametric model of the power system.

Abstract-Energy and environmental issues are two of the greatest challenges facing the world today. In response to energy needs and environmental concerns, renewable energy technologies are now considered the future technologies of choice. Renewable energy is produced from natural sources that are clean and free; however, it is widely accepted that renewable energy is not a solution that is without challenges. An example of this can be seen in the UK where there is much interest amongst generation developers in the construction of new large-scale onshore and offshore wind farms, especially in Scotland.As a part of an analysis of HVDC operating in parallel with AC transmission lines, this paper investigates PSS and SVC oscillation damping control schemes. The simple models presented in this paper represent the HVDC link and SVC as elements within the power system which provide an acceptable interaction with other system elements.In this study, in order to verify the performance of embedded HVDC links in parallel with the AC system and in combination with SVC, and the effect of the IEEE standard excitation model systems, an appropriate simulation for the system is performed using the PSCAD/EMTDC program.Index Terms--SVC POD Controller, PSS1A Type PSS, IEEE standard excitation model, PSCAD/EMTDC

Energy and environmental issues are among the greatest challenges facing the world. In response to energy needs and environmental concerns, renewable energy technologies are now considered the future technologies of choice. Renewable energy is produced from freely available and non-polluting natural sources; however, its utilization is not without challenge. There is much interest in Great Britain (GB) among generation developers in the construction of new large-scale onshore and offshore wind farms, especially in Scotland.Here, a range of dynamic stability analysis techniques is evaluated with regard to disturbances in the transmission system using reduced models of the GB transmission system. The impact of embedded high voltage DC links in parallel with the existing AC system and in combination with a number of installations of series compensation, with regard to active power flow, voltage and reactive power flow is investigated. Both an initial steady state analysis and subsequently the dynamic and transient analysis of the proposed solutions were applied as a first step towards integration of wind farms into the power grid. The most important point is to ensure the stability of the GB system when a credible contingency occurs.

Abstract-Energy and environmental issues are two of the greatest challenges facing the world today. In response to energy needs and environmental concerns, renewable energy technologies are now considered the future technologies of choice. Renewable energy is produced from natural sources that are clean and free; however, it is widely accepted that renewable energy is not a solution without challenges. An example of this can be seen in the UK, where there is much interest amongst generation developers in the construction of new large-scale onshore and offshore wind farms, especially in Scotland. The stability of electric power systems is also an important issue. It is important to have full knowledge of the system and to be able to predict the behaviour under different situations is an important objective. As a result, several industrial-grade power system simulator tools have been developed in order to estimate the behaviour of the electric power system under certain conditions. This paper presents a reduced Great Britain (GB) system model for stability analysis using PSCAD/EMTDC. The reduced model is based upon a future GB transmission system model and, hence, contains different types and mix of generation, HVDC transmission lines and additional interconnection. The model is based on the reduced DIgSILENT PowerFactory model developed by National Grid.Index Terms-System Modeling, Software Comparison, PSCAD/EMTDC, DIgSILENT.