Determination of Maximum Wind Power Penetration Considering Wind Turbine Fast Frequency Response

This paper presents a study based on sensitivity analysis to investigate the impact of fast frequency response (FFR) capability of type 4 wind turbine units on the overall frequency performance of interconnected power systems with low inertia. FFR capability is implemented by means of a control loop for inertia emulation (IE), which is...

A dynamic emulator for physically based flow simulators under varying rainfall and parametric conditions

This work presents a method to emulate the flow dynamics of physically based hydrodynamic simulators under variations of time-dependent rainfall and parametric scenarios. Although surrogate modelling is often employed to deal with the computational burden of this type of simulators, common techniques used for model emulation as polynomial...

A data-driven surrogate modelling approach for acceleration of short-term simulations of a dynamic urban drainage simulator

In this study, applicability of a data-driven Gaussian Process Emulator (GPE) technique to develop a dynamic surrogate model for a computationally expensive urban drainage simulator is investigated. Considering rainfall time series as the main driving force is a challenge in this regard due to the high dimensionality problem. However, this...

A Hybrid Surrogate Modelling Strategy for Simplification of Detailed Urban Drainage Simulators

Urban drainage modelling typically requires development of highly detailed simulators due to the nature of various underlying surface and drainage processes, which makes them computationally too expensive. Application of such simulators is still challenging in activities such as real-time control (RTC), uncertainty quantification analysis or...

Virtual Inertia Emulation in islanded microgrids with energy storage system

The inertial response plays a vital role in electrical networks to reduce the rate of change of frequency (RoCoF) following a contingency event. If the inertia has a low or zero value due to a lack of synchronous generators, then the electrical network might experience large undesirable frequency deviations. To overcome this problem, in previous...

Small-signal modelling and stability analysis of a traditional generation unit and a virtual synchronous machine in grid-connected operation

The virtual synchronous machine (VSM) concept has emerged as an approach to provide flexible distributed control of power electronic converters interfacing distributed energy resources with the grid. It supports power system operation by providing ancillary services, and facilitates a seamless transition between grid-connected and islanded...

The Spike app: A programable neuron to stimulate brain slices in electrophysiology

Methods to stimulate living neurons in electrophysiological experiments involve the use of nerve stimulators that output deterministic patterns fixed at a certain frequency. Thus, they are unable to generate realistic sequences of action potentials to stimulate living neurons. By emulating firing patterns of excitable cells we are able to give...

The use of process simulation models in virtual commissioning of process automation software in drinking water treatment plants

This research deals with the contribution of process simulation models to the factory acceptance test (FAT) of process automation (PA) software of drinking water treatment plants. Two test teams tested the same piece of modified PA-software. One team used an advanced virtual commissioning (AVC) system existing of PA-emulation and integrated...

Integration of drinking water treatment plant process models and emulated process automation software

The objective of this research is to limit the risks of fully automated operation of drinking water treatment plants and to improve their operation by using an integrated system of process models and emulated process automation software. This thesis contains the design of such an integrated system. The use of the system is investigated in the...

Innovative wave energy conversion: Optimization of the energy harvesting cycle and converter design for a wave energy converter with Electro Active Polymers

Studies performed in the last decade have shown that wave energy could contribute as much as 10% in the current world electricity demand, making the ocean one of the most underrated and unexploited renewable sources so far. Wave energy offers distinctive advantages compared to other renewable technologies, providing a constant and predictable...

An approach for designing robotized marine container terminals

International transportation is rapidly growing. Even during the recent recession, trade growth percentages world-wide exceeded 5-10%. As a consequence, container handling capacity is rapidly growing as well. Larger vessels, bigger container terminals: it appears to be an on-going process of which the limits have not yet been reached. At the...