Mostly FACTS devices are used to inject the reactive power into weak power system and improve the stability. Nowadays, we include more number of DG in power system. In this condition, does any instability condition occur? What type of instability occurs? Will using facts devices become possible or not?
It is possible. It needs stability simulations. Transient and dynamiic voltage instability is possible. It needs dynamic simulation. It is possible to use FACTS to solve the voltage instability and in certain conditions and applications transient stability.
of late there is increased interest in the potential for Distributed Power Systems (DPS): a combination of distributed sources of power production, and distributed energy storage.
Facts Devices are used for for improving the voltage profile at the buses,reducing the power losses, improving stability, islanding in case of faults nearer to D.Gs,trying to pull down the non conventional energy sources etc at Micro grid level.
But almost all of them involves switching operations and generate Harmonics which are to be eliminated and are also costly.Most of these improvements can easily be achieved by using Capacitor Banks,which are simple,cheaper,and effective,particularly at Primary and Secondary Distribution levels.Facts Devices are very effective in controlling Power Quality involving Voltage sags and swells.
While using Facts Devices one has to consider the absolute necessity and cost.
P.S.
Hello! The answer (positive and negative) to your question depends on some factors and conditions, namely, the power of the system, the importance (category) of consumers fed by this system, the availability of other sources of reactive power, and so on.
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