Network construction type flexible interconnection device and control method thereof

Abstract

The invention discloses a network construction type flexible interconnection device, which comprises three phase units, and each phase unit comprises three bridge arms; the input sides of the three phase units input the same three-phase power supply, the positive electrode end of the first bridge arm of each phase unit is connected with a first power supply through a bridge arm inductor, and the positive electrode end of the second bridge arm of each phase unit is connected with a second power supply through a bridge arm inductor. The positive end of the third bridge arm of each phase unit is connected with a third power supply through a bridge arm inductor; the negative ends of the three bridge arms of each phase unit are connected to serve as the leading-out end of the corresponding phase unit, and the reactor and the first mechanical switch are connected in series between the leading-out end of each phase unit and the electric phase of the power grid. The modular design is adopted, integrated production and redundancy expansion are easy, and the reliability is high.

Description

technical field [0001] The invention relates to the technical field of power converters, in particular to a flexible interconnection device of a network configuration type and a control method thereof. Background technique [0002] With the continuous improvement of the penetration rate of distributed new energy, its inherent output uncertainty, the diversity of access methods and power generation and grid modes have an increasingly prominent impact on the distribution network, making the operation and scheduling of the distribution network face new challenges. The distribution network faces severe challenges such as the safe and stable consumption of the fluctuating power of the source and the load, the suppression of the three-phase imbalance, and the coordination of multiple subjects under the market mechanism. At the same time, the large-scale application of power electronic devices represented by converters in the distribution network can significantly improve the power...

Images