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The proposition for this study is to assess how much simulation results can differ from real measurements on the implementation of a control strategy for a grid-connected PV inverter. The system is simulated in Matlab/Simulink and experimentally evaluated on a real low-voltage distribution grid. The PV inverter is implemented using a power-hardware-in-the-loop platform running the control algorithm...
The transition of power grids towards distributed and renewable energy generation leads to challenges with respect to stability and operation of distribution grids that have to be tackled with adequate systems, technologies, and control methods. Therefore, we propose a hierarchical control architecture for distribution grids based on the principles of Organic Computing. This paper evaluates the results...
In this paper, a PV energy source has been connected to a flywheel (FW) for short term energy storage in addition to a battery (BAT) for long term energy storage. The purpose of this system is to serve as a part of a shipboard power system as means to deal with large transient loads. In order to make a robust power system for such loads, we propose a flywheel connected to a dc motor and connect this...
It is expected to install a large amount of generation from renewable energy sources such as wind power generation and photovoltaic generation into power systems. However, a large penetration of such renewable energy sources causes some problems in power systems, e.g. frequency fluctuation. In this paper, a number of Heat Pump Water Heaters (HPWHs), one of the energy efficient-use customers' appliances...
In the paper the application of energy storage for enhancing distributed energy sources penetration and contributing to better quality of energy delivery to customers was investigated. A simulation method was used to study the effectiveness of complex control algorithms of energy storage system enabling load leveling and simultaneous voltage stabilization effect in grid-connected microsystem. The...
The growth of distributed generation or renewable generation resources and advanced information systems add uncertainties and complexity to the energy system and call for a “smart grid” solution. The mathematical models that are conventionally utilized in the energy management system usually take a long time to develop and execute and are not flexible enough to accommodate operational rules for generations...
This paper presents an overview of the key issues in the use of frequency rate change (df/dt) in power system emergency control schemes. The role of df/dt in designing effective under frequency load shedding (UFLS) plan is discussed. The impact of new variable renewable sources (such as wind and solar units) on system frequency gradient is analyzed, and the need for the revising of frequency performance...
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