Uncategorized

Power system stability is a single problem, however, it is impractical to deal with it as such. Instability of the power system can take different forms and is influenced by a wide range of factors. Analysis of stability problems, including identifying essential factors that contribute to instability and devising methods of improving stable operation is […]

While it is true that power systems are designed to be transiently stable, and many of the methods described above may be used to achieve this goal, in actual practice, systems may be prone to being unstable. This is largely due to uncertainties related to assumptions made during the design process. These uncertainties result from

Transient stability is an important consideration that must be dealt with during the design of power systems. In the design process, time-domain simulations are conducted to assess the stability of the system under various conditions and when subjected to various disturbances. Since it is not practical to design a system to be stable under all

Many factors affect the transient stability of a generator in a practical power system. From the small system analyzed above, the following factors can be identified: Ø The post-disturbance system reactance as seen from the generator. The weaker the post-disturbance system, the lower the Pmax will be. Ø The duration of the fault clearing time.

1) MODELING: The basic concepts of transient stability presented above are based on highly simplified models. Practical power systems consist of large numbers of generators, transmission circuits, and loads. For stability assessment, the power system is normally represented using a positive sequence model. The network is represented by a traditional positive sequence power flow model,

Denotes the ability of an electric power system, for a given initial operating condition, to regain a state of operating equilibrium after being subjected to a physical disturbance, with most system variables bounded so that system integrity is preserved. Integrity of the system is preserved when practically the entire power system remains intact with no

OPERATION OF FUEL CELL POWER PLANTS: Telecommunications installations with backup fuel cell power often incorporate fuel cells and batteries. As the system voltage changes, rectifiers or controllers switch between the primary power source and the backup power sources. In the absence of grid power or another primary alternating current (AC) power source, the fuel cells,

Telecommunications providers rely on backup power to maintain a constant power supply, to prevent power outages, and to ensure the operability of cell towers, equipment, and networks. The backup power supply that best meets these objectives is fuel cell technology. The telecommunications industry relies on an elaborate network of cell phone towers and field facilities

Fuel injection is a system for mixing fuel with air in an internal combustion engine. A fuel injection system is designed and calibrated specifically for the type of fuel it will handle. Most fuel injection systems are for diesel applications. With the advent of electronic fuel injection (EFI), the diesel gasoline hardware has become similar.

FUEL SUPPLY SYSTEM OF DIESEL POWER PLANT It consists of storage tank, strainers, fuel transfer pump and all day fuel tanks. The fuel oil is supplied at the plant site by rail or road. The oil is stored in the storage tank. From the storage tank, oil is pumped to smaller all day tank at