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Power generation characteristics of a horizontal tidal current power generation system have been investigated. At first, a model test had been carried out at laboratory level for finding more optimal shapes of the turbine of the generation system. Secondly, two tests had been carried out for two model sizes (medium size: 1.2m × 0.65m, large size: 6.0m × 3.0m). In the laboratory test, the constructed...
This paper presents initial results of a grid restoration study carried out in the cities of Berlin and Hamburg. The objective of the study was to identify the optimal restoration strategy for the local distribution network by using only units available within the service areas. By putting the strategy into practice, partial restoration can be achieved faster and the cities are not totally dependent...
Wide-area monitoring and control system complements the classical protection systems and overcomes their drawbacks. In such systems a dynamic view of power system, using synchronized measurements in short time intervals, smaller than 20 ms, is available. This new kind of system's information provides a novel preventive control action to prevent system's large disturbances. This paper proposes a new...
Load flow and short circuit studies are the two important power system analysis components to ensure the system upgrades, future upgrades and present distribution equipment meeting the present and future requirements. A number of power system analysis softwares are used to perform the analysis. This paper presents the analysis of load flow and short circuit studies of an offshore platform using ERACS...
This paper provides an analysis of the separation philosophy for a large steel mill with internal generation, which is transitioning from net power import to net power export after the addition of two new steam turbine generators. Separation from the utility in the case of a fault is determined by the operation of the protective relay system at the point of separation. The plant has a PLC controlled...
Electric power network stability analysis requires that all system components are represented by their models. Usually, detailed data about system components such as generators, transformers and transmission lines are available. In this case accurate models can be derived from the network devices. However, corresponding data for individual loads are not always available, which makes the modelling...
This paper concerns the effects of generator controller limits on long-term power system stability. It is shown through an example that when the system operates near its limits, saturation in the turbine/governor controllers can lead to frequency instability that would not be evident from load-flow analysis. A linearized model with controller saturation nonlinearity is obtained that preserves the...
A new approach based on particle swarm optimization technique is proposed for the design of load following controller for microturbines in a competitive distributed generation power system. The objective is to avoid any power change from upper system when there is small load change in the local distribution system. A case study for IEEE-37 Node Feeder is presented to illustrate the proposed approach...
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