A Control Method for Converter-interfaced Sources to Improve Operation of Directional Protection Elements

The traditional fault control strategy of converter-interfaced renewable energy sources (CIRESs) may bring about a lower sensitivity level or misoperation of fault component-based directional elements. To overcome this problem, a new control scheme is proposed to adjust sequence impedance angles of CIRESs by computing suitable current...

Fundamental study on the influence of dynamic load and distributed energy resources on power system short-term voltage stability

The number of Distributed Energy Resources (DER) and dynamic loads is increasing rapidly in modern power systems. Their aggregated effects on power grid dynamics are, however, still insufficiently explored. It is expected that distribution-transmission interactions will be more pronounced in the future, resulting in a stronger need to analyse...

Increasing the Share of Wind Power by Sensitivity Analysis based Transient Stability Assessment

The massive integration of wind power plants into the transmission system calls for a careful scrutinization of their dynamic behaviour and the interactions with the power system in the transient stability time-frame of interest. This paper presents a sensitivity analysis based approach to investigate the impact of full converter wind turbine...

Protection of Multiterminal HVDC Grids based on Modular Multilevel Converters: DC Fault Ride-Through and AC Grid Support

High Voltage DC (HVDC) grids provide an efficient solution for the transmission of bulk power over long distances between the energy production and consumption centers. Up to now, most of the implemented dc connections are point-to-point, creating dc links to strengthen the existing, predominantly ac, electricity grid. However, to optimize the...

Modelling, control and stability analysis of the COBRAcable project integrated in the Dutch transmission system: Evaluation of the performance of the controllers

The COBRAcable project is one of the major interconnectors being constructed in the North Sea, connecting the Netherlands with Denmark. It is a 325 km submarine cable which will have the ability to transfer 700 MW. The importance of the interconnector is manifold: to facilitate the exchange of renewable energy coming from the onshore Danish...

Investigation on Fault-ride Through Methods for VSC-HVDC Connected Offshore Wind Farms

Recently, there has been a fast development and deployment of wind energy to meet the increasing electrical power demand and to limit the use of fossil fuels. More and more wind farms are planned far from shore because of good wind condition and less visual impact. This is so called offshore wind farm (OWF). In such a situation, high voltage...

Response of Low Voltage Networks with High Photovoltaic Systems Penetration to Transmission Network Faults

The need for fault ride-through (FRT) capability is not yet documented for the low voltage connected DG. The realization that an increase in the capacity of installed DG power in the specific voltage level can trigger disconnection, in case of transmission faults, of massive amounts of power from DG and jeopardize system stability is forming. In...