All Outputs (12)

A Less Intrusive Solution To Stablize VSC Transmission Against Highly Variable Grid Strength (2020)
Journal Article
Zhang, Z., Chen, D., Givaki, K., & Xu, L. (2021). A Less Intrusive Solution To Stablize VSC Transmission Against Highly Variable Grid Strength. IEEE Journal of Emerging and Selected Topics in Power Electronics, 9(6), 7199-7211. https://doi.org/10.1109/JESTPE.2020.3030362

A less-intrusive solution to stabilize a Voltage Source Converter (VSC) over an unknown grid strength is presented in this paper. The existence of equilibrium point is investigated as a prerequisite to stabilization. By partially imposing grid formin... Read More about A Less Intrusive Solution To Stablize VSC Transmission Against Highly Variable Grid Strength.

Renewable energy resources and technologies applicable to Sri Lanka towards a 100% RE future (2019)
Conference Proceeding
Fernando, W., Gupta, N., Ozveren, C. S., & Givaki, K. (2019). Renewable energy resources and technologies applicable to Sri Lanka towards a 100% RE future. . https://doi.org/10.1049/cp.2019.0628

The combustion of fossil fuels primarily provides the energy supply in Sri Lanka. The energy generation in Sri Lanka is primarily realized by the combustion of thermal energy such as diesel and coal. The second energy generation source is Hydroelectr... Read More about Renewable energy resources and technologies applicable to Sri Lanka towards a 100% RE future.

Feasibility Study of Small Scale Battery Storage Systems Integrated with Renewable Generation Technologies for Sri Lankan Domestic Applications (2019)
Conference Proceeding
Fernando, W., Gupta, N., Kamyab, G., & Suheyl, C. O. (2019). Feasibility Study of Small Scale Battery Storage Systems Integrated with Renewable Generation Technologies for Sri Lankan Domestic Applications. . https://doi.org/10.1109/upec.2019.8893549

The purpose of energy storage technologies is to ultimately increase the efficiency of renewable energy generation methods and systems and decrease the global CO 2 emissions to tackle the Sri Lanka government's sustainability targets. This research a... Read More about Feasibility Study of Small Scale Battery Storage Systems Integrated with Renewable Generation Technologies for Sri Lankan Domestic Applications.

Different Options for Multi-Rotor Wind Turbine Grid Connection (2019)
Conference Proceeding
Givaki, K. (2019). Different Options for Multi-Rotor Wind Turbine Grid Connection. In Proceedings of 9th International Conference on Power Electronics, Machines and Drives (4065-4068). https://doi.org/10.1049/joe.2018.8009

In this paper, different options for integration of the multi-rotor wind turbine concept is investigated. The intra-turbine collection network of the multi-rotor wind turbine can be designed in either AC or DC. The reliability and costs associated wi... Read More about Different Options for Multi-Rotor Wind Turbine Grid Connection.

Different options for multi‐rotor wind turbine grid connection (2019)
Journal Article
Givaki, K. (2019). Different options for multi‐rotor wind turbine grid connection. Journal of Engineering, 2019(17), 4065-4068. https://doi.org/10.1049/joe.2018.8009

In this paper, different options for integration of the multi-rotor wind turbine concept is investigated. The intra-turbine collection network of the multi-rotor wind turbine can be designed in either AC or DC. The reliability and costs associated wi... Read More about Different options for multi‐rotor wind turbine grid connection.

An Alternative Current-Error Based Control for VSC Integration to Weak Grid (2018)
Conference Proceeding
Givaki, K., Chen, D., Xu, L., & Xu, Y. (2018). An Alternative Current-Error Based Control for VSC Integration to Weak Grid. In IEEE PES General Meeting 2018. https://doi.org/10.1109/PESGM.2018.8586145

An enhanced current control strategy is proposed for voltage source converters for the integration to weak grids. The control derives from the current-error based vector control. By implementing simple close-loop compensations of both angle and magn... Read More about An Alternative Current-Error Based Control for VSC Integration to Weak Grid.

Analysis of integration of multi‐terminal HVDC network to weak grids (2018)
Journal Article
Givaki, K., Rahman, M. H., Vozikis, D., & Giveki, A. (2019). Analysis of integration of multi‐terminal HVDC network to weak grids. Journal of Engineering, 2019(16), 3219-3224. https://doi.org/10.1049/joe.2018.8447

In this paper, the integration of multi-terminal HVDC systems to weak power grids is analysed under different grid strengths and control methods. In this paper, a modular multi-level converter based MTDC network is considered. The analysis showed the... Read More about Analysis of integration of multi‐terminal HVDC network to weak grids.

Analysis of integration of multi-terminal HVDC network to weak grids. (2018)
Presentation / Conference
Givaki, K., Rahman, M. H., Vozikis, D., & Giveki, A. (2018, June). Analysis of integration of multi-terminal HVDC network to weak grids. Paper presented at The 14th IET International Conference on AC and DC Power Transmission (ACDC 2018)

In this paper, the integration of multi-terminal HVDC systems to weak power grids is analysed under different grid strengths and control methods. In this paper, a modular multi-level converter based MTDC network is considered. The analysis showed the... Read More about Analysis of integration of multi-terminal HVDC network to weak grids..

Current Error Based Compensations for VSC Current Control in Weak Grid for Wind Farm Applications (2018)
Journal Article
Givaki, K., Chen, D., & Xu, L. (2019). Current Error Based Compensations for VSC Current Control in Weak Grid for Wind Farm Applications. IEEE Transactions on Sustainable Energy, 10(1), 26-35. https://doi.org/10.1109/tste.2018.2820386

A novel current control strategy is proposed for voltage source converter connecting to weak grid using conventional current vector control with additional current error based voltage angle and magnitude compensations. For connecting to very weak AC... Read More about Current Error Based Compensations for VSC Current Control in Weak Grid for Wind Farm Applications.

Stability studies of different AC collection network topologies in wind farms (2017)
Conference Proceeding
Givaki, K., Chen, D., & Anaya-Lara, O. (2017). Stability studies of different AC collection network topologies in wind farms. In 5th IET International Conference on Renewable Power Generation (RPG) 201

In this paper, the stability of different wind farm collection network topologies have been studied. As the wind farm becomes larger, the inter-array network becomes larger so that the impedance of overall system is increased. This means that the int... Read More about Stability studies of different AC collection network topologies in wind farms.

Stability Analysis of Large Wind Farms Connected to Weak AC Networks Incorporating PLL Dynamics (2016)
Conference Proceeding
Givaki, K., & Xu, L. (2016). Stability Analysis of Large Wind Farms Connected to Weak AC Networks Incorporating PLL Dynamics. In International Conference on Renewable Power Generation (RPG 2015). https://doi.org/10.1049/cp.2015.0440

Voltage source converter interfaced wind turbines connected to weak grids can induce system instability. A state space model is used in this paper to study the stability of large wind farms. Dynamics of the phase locked loop is integrated to the stat... Read More about Stability Analysis of Large Wind Farms Connected to Weak AC Networks Incorporating PLL Dynamics.

Estimation of the power electronic converter lifetime in fully rated converter wind turbine for onshore and offshore wind farms (2014)
Conference Proceeding
Givaki, K., Jamieson, P., & Parker, M. (2014). Estimation of the power electronic converter lifetime in fully rated converter wind turbine for onshore and offshore wind farms. In 7th IET International Conference on Power Electronics, Machines and Drives (PEMD 2014). https://doi.org/10.1049/cp.2014.0301

A comparison has been made of the converter lifetime for a 3MW fully rated converter horizontal axis wind turbine located onshore and offshore. Simulated torque and speed of the turbine shaft were used to calculate voltage and current time series, th... Read More about Estimation of the power electronic converter lifetime in fully rated converter wind turbine for onshore and offshore wind farms.