Research On Electric Power Operation DC Power System In Transformer Substation

Electricity energy has become more and more important in daily life. Power system must work safe and reliable to insure the normal of power supply system. So DC power system must work reliable, which is the core of power system, transformer substation. High frequency switching power supply adopting soft switching technology, which has reliable high efficiency and long use time performances becomes the important part of DC power system. Modem network technology and computer control technology have been applied into the DC power system, which realizes remote monitor of power system. Therefore, it can bring safe and reliable power supply for first-use devices in substation and makes product and lives better.At the beginning of the paper, every components of DC power system are introduced. Then, system design rules are given. For key components and key technologies, they are discussed detailed in another part of paper.Charge and discharge modular is the core of DC power system. And it is also the core of the paper, which influences the use life of battery and the system reliability. As is known, conventional charge and discharge modular uses phase control rectification technology, which brings big change of output voltage, interrupt of electrical magnetic, low efficiency, and large size. Because of these, a high frequency switching supply based on phase shift control full bridge PWM soft switching technology can solve the flaws. The phase shift control full bridge PWM technology renders the switchers of converter works under Zero Voltage Zero Current Switching condition, which can reduces switching loss, but also can decrease the size of the converter and enhance the power density of system and make the output more reliable. It is very useful for protecting the battery and the system.Distributed power supply has extendable, high efficiency and response fast performances, which becomes the hot in the world. It combines small power supply unit together to supply power for system, of which the technology is current sharing technology. And the mount of...