Energy router topology structure realizing distributed power supply integration

Abstract

Disclosed is an energy router topology structure realizing distributed power supply integration. The structure comprises an input module, an output module and a DC / DC module. Basic unit modules can form an emerge router of three-phase AC input and three-phase AC and DC output, based on a common-core multi-winding intermediate-frequency or high-frequency transformer, and the input module of the energy router is composed of three filtering reactors, 3*n DC capacitors and 3*n cascading H-bridge type rectification units; the output module is composed of three filtering reactors, three filtering capacitors, one DC capacitor and one three-phase inversion unit; and the DC / DC module is composed of one common-core multi-winding intermediate-frequency or high-frequency transformer, n H-bridge type rectification units and n H-bridge type inversion units. The router can be conveniently connected with regenerative energy generating equipment, energy storage equipment and different loads, provides power supply and power consumption flexibility, can simultaneously output DC power and AC power, enables output voltages to be adjustable and satisfies different demands of users.

Description

Technical field [0001] The present invention relates to the technical field of electronic equipment, in particular to an energy router topology for realizing distributed power integration. Background technique [0002] Energy router is a new type of power device that uses power electronic devices and high-frequency transformers to realize power conversion, voltage conversion, power transmission, and power quality management through power electronic conversion technology. So far, domestic and foreign researchers have proposed many types of energy router devices, which have their own advantages and disadvantages. When facing the power supply demand of the DC grid incorporated into the distributed power supply, the functional requirements of the device are higher, and the general energy router structure becomes more complicated and the scalability is poor. [0003] The existing distribution network has the following problems. First, the network structure and operation mode of the dis...

AI Technical Summary

Problems solved by technology

When facing the DC grid power supply needs of distributed power sources, the functional requirements of the device are higher, and the general energy router structure becomes more complicated and the scalability is poor.

[0003] The existing distribution network has the following problems. First, the network structure and operation mode of the distribution network are not flexible and interactive enough to effectively utilize distributed and intermittent renewable energy, and it is also difficult to meet uncertainties such as electric vehicles. Flexible load access and orderly power consumption

[0004] Second, the intelligence level of primary equipment is not high, the integration of primary and secondary equipment is insufficient, there is a lack of flexible power flow regulation and voltage control means, there is no ability to flexibly optimize configuration, and the utilization rate of power equipment is low

[0005] Third, there are more and more nonlinear loads in the distribution network, and a series of power quality problems such as instantaneous voltage drop, voltage fluctuation, grid harmonics, and three-phase imbalance

[0006] Fourth, the power transformer has a large volume and weight, and the insulating oil of the transformer will cause environmental problems and is not easy to maintain. The nonlinear characteristics of its ferromagnetic components will cause voltage and current distortion of the grid, and generate harmonic pollution

[0007] Fifth, when a fault occurs on the grid side or the load side, the fault cannot be isolated, resulting in the expansion of the fault range, and it does not have a self-protection function, and a supporting relay protection device is required;

[0008] Sixth, without an intelligent mechanism, the interaction between the distribution network and other equipment in the distribution network cannot be realized

Images