Development of a Method of Analyzing the Control Characteristics of Thermal Power Plants and their Interaction with Power Systems
Jan Andersson · 1993
This thesis describes a network simulator system that has been developed in order to simulate special type of network conditions, e.g. islanding operation, for networks connected to thermal power stations, especially with regard to frequency control. The simulator has been developed so that it can operate both connected to an actual power station in operation or to a power station simulator. It has been designed primarily with regard to the Stenungsund thermal power station, but is of a general design and will in the continuation of this project be adapted also for other types of power stations. The main principle of the simulator is that it can be applied to a power station in operation and perform simulations where special network conditions are simulated in spite of that the power station is still connected to its normal network. This simulator has been developed as a tool for further studies of special operating conditions for power stations, in particular islanding operation. Certain such studies have been carried out and are described in this thesis. The studies have shown that islanding operation is a complex situation where unexpected behavior of the power station can sometimes lead to very unwanted consequences and that it is therefore necessary to be able to test such situations in advance, as it is otherwise highly unlikely that the station will be able to remain in operation under such conditions. Tests as described above can show the need for new control systems or systems settings as well as new routines for operating the stations under such conditions and also for operator training so that the station operators know how to handle these situations. The simulator can be used as a tool for all these purposes.