Multi-port electric energy router and control method thereof

A router, multi-port technology, applied in the field of power electronics, can solve the problems of low integration, complex structure and control, and high cost

Inactive Publication Date: 2020-10-23
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems of low integration, complex structure and control, low efficiency and high cost existing in ex

Method used

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  • Multi-port electric energy router and control method thereof
  • Multi-port electric energy router and control method thereof
  • Multi-port electric energy router and control method thereof

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Embodiment Construction

[0035] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings, but it is not limited thereto. Any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention should be covered by the present invention. within the scope of protection.

[0036]figure 1 A specific embodiment of the circuit structure of a multi-port power router is shown. The circuit structure consists of 3 strings of upper-bridge sub-modules, 3 strings of lower-bridge sub-modules, MMC-SST integrated module 1, and MMC-SST integrated module 2 , MMC-SST integrated module 3, reactor L g , Medium-voltage AC MVAC ports, medium-voltage DC MVDC ports, and low-voltage DC LVDC1-LVDC3 ports. The upper bridge arm submodule string and the lower bridge arm submodule string are respectively composed of N submodules (SM 1 ~SM N ) in ...

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Abstract

The invention discloses a multi-port electric energy router and a control method thereof. The multi-port electric energy router comprises a medium-voltage alternating-current MVAC port, a medium-voltage direct-current MVDC port, a low-voltage direct-current LVDC port, a three-phase MMC-SST hybrid circuit and an electric reactor Lg; in the three-phase MMC-SST hybrid circuit, the A phase, the B phase and the C phase are respectively composed of an upper bridge arm sub-module string, a lower bridge arm sub-module string and an MMC-SST integrated module. A transformer is integrated on the bridge arm of the MMC, and the leakage inductance and the excitation inductance of the transformer are utilized to form the bridge arm inductor, so the integration level of the system is improved, the size and the cost are reduced, and the safety of the system is improved through isolation of the transformer; MVDC, MVAC and LVDC port interconnection can be realized by using a single MMC, medium-voltage and low-voltage power grid interconnection and alternating current and direct current power grid interconnection are realized, the structure is simple, the control is simple and convenient, the functionis strong, and the safety is high; and connection modes are diversified, and different application scenes can be adapted.

Description

technical field [0001] The invention belongs to the technical field of power electronics and relates to a multi-port power router and a control method thereof, in particular to a medium-low voltage AC-DC hybrid power router based on MMC and SST integration technology and a control method thereof. Background technique [0002] Power routers, also known as power electronic transformers, energy routers, etc., are key components of the Energy Internet. Grid interconnection and grid interconnection of multiple voltage levels are the inevitable requirements of the future Energy Internet. Therefore, the power router needs to provide the functions of multi-port, multi-voltage level, and AC / DC hybrid connection. [0003] In this context, new power electronic topologies such as MMC (Modular Multilevel Converter, modular multilevel converter), SST (solid-state transformer, solid-state transformer) and their control methods continue to emerge. DC hybrid connection and conversion of di...

Claims

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Application Information

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IPC IPC(8): H02M7/797H02M1/10
CPCH02M1/10H02M7/797H02M1/0067H02M1/009Y02B70/10
Inventor 李彬彬廖志贤赵晓东毛舒凯付勤天徐殿国
Owner HARBIN INST OF TECH
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