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This paper has developed a methodology for testing of substation functional circuits from the utility company. This methodology allows making all possible combinations of the functional circuits, aiming to find whether there is any fault, bad operation or project mistake in these circuits. The fundamental idea is that this set of tests, automatically made by a computer package, provide the elimination...
The increase of dispersed generation (DG) has a strong impact on power system operation. A distribution network, where most of dispersed generators are connected, cannot be considered as passive anymore. Active character of the distribution networks brings problems and uncertainties, but at the same time offers more possibilities for control. Control of distribution networks with DG can be performed...
The inertia of fixed-speed wind turbine generators (WTGs) helps to mitigate under-frequency transients, promotes fault ride-through and damps inter-area oscillations. It is therefore important to quantify this inertia. The authors use measured wind farm responses during under-frequency transients to provide this information. They discuss the extent of the data and the criteria used to select certain...
The performance of photovoltaic power system interconnected with utility grid can be improved through an application of advanced control method. This paper introduces an application of an artificial neural network on the operation control of the photovoltaic/utility grid to improve system efficiency and reliability. The generated power from photovoltaic solar cells array have been calculated by a...
This paper proposes a new continuation power flow calculation method in power systems. The continuation power flow calculation focuses on tracing power flow solutions in changing a specified value of the power flow calculation. It plays an important role in power system operation and planning. In particular, it is very useful for understanding load characteristics at each node. From a standpoint of...
Protection and control systems play important roles in power system operation and for the reliability and security of supply. This paper presents main results from a study of incorrect operations of protection and control systems on the voltage levels 1 - 420 kV in Norway, comprising mainly false and missing operations. The statistics for the period 1999 - 2003 show that false or unwanted operation...
The rapidly increased installation of dispersed - especially wind - generation requires closer consideration of the impact on power system operation. Therefore, simulation models covering the temporal and informational ranges of system operation (SCADA) were developed and integrated into an existing training simulator, thus allowing power system operators to be trained under realistic circumstances...
This paper proposes a new method for voltage stability assessment in power systems. The proposed method is based on a hybrid method of optimal data mining and an artificial neural network (ANN). Voltage stability is of main concern in power system operation and planning. In recent years, the deregulated power market brings about the uncertain events and increases the degree of uncertainty. As a result,...
Reliability is one of the most important criteria which must be taken into consideration during planning and operation phases of a power system even (or may be, particularly) in the time of disintegration, deregulation and competition. This paper considers the assessment of generating capacity reliability, in terms of adequacy; computationally efficient algorithms and theirs computer realization (GRA...
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