Research On DC Power Quality Control

Currently, the worldwide energy shortage and environmental pollution problems have become increasingly prominent, countries around the world have launched a new type of resource development and use of clean stage. It is expected mid-2000 s, China's renewable energy production to meet the country's 40% to 45% of demand.Renewable resources applications, there are some specific issues, such as solar, wind, ocean energy, there is a certain randomness and intermittent, to use this energy in the power grid would be to time constraints. In order to meet the needs of future energy development, we must continue to improve existing technologies and equipment, and optimize the structure of China's power grid. Many people will turn to research DC power grid, improve power quality has become a key driver of the current distribution network urgent problems.In this paper, power quality conditions and improve the traditional power grid were studied to explore the traditional power quality control whether the DC grid as effective. Then put forward the DC power quality control and effective measures. Finally, through modeling Influence access mixing energy storage device DC distribution network.Under the premise of research results are summarized and distributed DC power distribution network impacts the DC power quality control analysis, the following conclusions:(1) DC distribution network storage link may be a hybrid energy storage system, thereby improving the quality of power supply.(2) Compared with traditional single storage system, highlighting the advantages of hybrid energy storage system that can be quickly converted between the active and reactive power for voltage fluctuations, thereby protecting the power grid can be stabilized.