A Novel Virtualization Intelligent Power Supply with Large Capacity Energy Storage

With the rapid development of urban-rural integration, distributed generation and electric vehicles, the distribution network presents the characteristics of multisource, interconnection and ubiquity, which puts forward higher requirements for security, reliability, interactivity and adaptability of power system. Based on the urgent demand of distribution transformer short-circuit test, this paper combines energy storage power supply technology and high-power inverter multiple technology. The double feedback automatic constant voltage design is used to realize the compensation of energy storage element capacity attenuation. This paper innovatively puts forward the technical scheme of large capacity storage virtual test power supply, which breaks through the limitation of power supply capacity for the transformer sudden short-circuit test. The power supply system has the characteristics of miniaturization, integration, mobility and accurate output control, which makes it possible to carry out some related tests of distribution network equipment on site. The application of the intelligent power supply effectively ensures the safety and reliability of distribution network system. It also has a wide application prospect in reactor switching test, capacitor withstand voltage test, transformer hot oil circulation and so on.