Electric energy router and electric energy router control method

Abstract

The invention discloses an electric energy router and an electric energy router control method. The electric energy router comprises three phase units; each phase unit comprises two bridge arm units which are connected in series, and a connection point of the two bridge arm units which are connected in series forms a high-voltage alternating-current port of the corresponding phase unit; each high-voltage alternating-current port is connected with an alternating-current power supply of a corresponding phase; the three phase units are connected in parallel to form a high-voltage direct-current port; each bridge arm unit is formed by connecting a bridge arm reactor, a power module unit and a plurality of hybrid alternating-current sub-modules in series; different numbers of hybrid alternating-current sub-modules are connected into each phase unit to form alternating-current ports of different voltage levels corresponding to the phase unit. According to the invention, control of transmission power among the electrical connection ports, bridge arm energy balance and sub-module capacitance voltage-sharing control are realized, high-voltage, medium-voltage and low-voltage alternating-current / direct-current electrical ports can be integrally provided, and the power density and energy utilization efficiency of equipment are effectively improved.

Description

technical field [0001] The invention relates to the technical field of multi-port AC-DC power conversion and energy transfer, in particular to a power router and a power router control method. Background technique [0002] The power router has technical advantages such as active and reactive power independent adjustment, flexible control, etc. It can realize multi-voltage level AC and DC power transformation and multi-system energy interconnection, and directly provide grid-connected and power supply ports for renewable energy and AC-DC loads. It is an important means to improve the acceptance capacity of renewable energy, enhance the stability and flexibility of the power grid, and support energy transformation. The existing power routers need to rectify the power first, then transform it to DC, and finally invert it. The large number of power devices leads to high cost and bulky equipment. Contents of the invention [0003] Therefore, the present invention provides a p...

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Problems solved by technology

[0003] Therefore, the present invention provides a power router and a power router control method, so as to solve the problem that the existing power router has too many power conversion stages and cannot guarantee the operating efficiency of the equipment

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