Distributed Dc Power Systems

Dc systems are more efficient and suite better to integrate some of the renewable energy sources storage units and dc loads.

Distributed dc power systems.

A typical dc system distributes power at approximately 380v dc using one of two methodologies. It generally consists of feeders distributors and the service mains. Abb ge critical power dc power systems and installation includes power switching products uninterruptible power supplies ups dc energy systems and installation solutions for small cell and distributed antenna systems das inverters and embedded power supplies such as board mounted power and front end rectifiers. That part of power system which distributes electric power for local use is known as distribution system.

Automated load shedding is one of the most interesting and advanced distributed power capabilities. In general the distribution system is the electrical system between the power substation fed by the transmission system and the consumers meters. Tightly regulated power converters in the aforementioned settings exhibit negative incremental impedance and behave as constant power loads cpls. A wide range voltage 10 percent 20 percent methodology that accommodates direct connection of the battery backup and a narrow range voltage percent.

A dc distributed power system usually consists of large number of power electronic converters connected in cascad0ed configuration to satisfy the power quality and voltage magnitude requirements of the sources and loads. Also sensitive equipment likely to be installed in future intelligent buildings also needs energy backup i e. The energy is transmitted at only one voltage level to all the consumers using this system. Blue sea systems battery management panels can be used to provide a complete stand alone dc main power distribution system.

A typical unipolar dc power distribution system is as shown in the following figure. The panels also can be combined with other blue sea system panels or fuse blocks to create a distributed system consisting of main and branch circuits. The concept is to avoid overloading dc circuits shorepower connections or a generator by temporarily turning off appliances like water heaters and refrigeration when more urgent demands come online.