Three-port direct-current energy router power coordination control method

A coordinated control and router technology, applied in the field of power coordinated control of three-port DC energy routers

Pending Publication Date: 2020-06-02
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] This application provides a three-port DC energy router power coordination con...

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  • Three-port direct-current energy router power coordination control method
  • Three-port direct-current energy router power coordination control method
  • Three-port direct-current energy router power coordination control method

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Embodiment Construction

[0039] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0040] This application mainly focuses on the application scenarios of multi-DC microgrid interconnection systems. figure 1 Shown is a schematic diagram of the structure of a three-DC microgrid interconnection system (or three-port DC microgrid) based on DC-MPET, in which distributed generation (distributed generation, DG) units such as distr...

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Abstract

The invention discloses a three-port direct-current energy router power coordination control method, which comprises the following steps that: a port power controller collects a direct-current bus voltage value of each microgrid, and performs per-unit processing on the active power droop characteristic of the bus voltage value to obtain a voltage per-unit value of each port; therefore, different droop characteristics of the three direct-current micro-grids can be unified, and the direct-current micro-grids can be analyzed and power transmission of each port of the three-port direct-current energy router can be controlled under the same coordinate system. The transmission power deviation of each energy router port is calculated according to the voltage per unit value of each port; and a TABinternal controller converts the transmission power deviation of each energy router port into an adjustment amount of a phase shift angle between the energy router ports. Driving pulses of all switches of the TAB converter are obtained through continuous phase modulation, and power coordination control over the three-port direct-current energy router is achieved. The bus voltage stability can bemaintained, and the risk coping capacity of a power grid system is improved.

Description

technical field [0001] The present application relates to the technical field of multi-DC micro-grid interconnection systems, in particular to a power coordination control method for a three-port DC energy router. Background technique [0002] With the rapid development of distributed power sources such as photovoltaics and wind turbines, microgrids will be the most important operation mode in the DC distribution network in the future, especially DC microgrids. In addition, with the continuous increase of the capacity and scale of DC microgrids, affected by geographical factors and the multi-voltage level power supply requirements of low-voltage DC loads, multiple low-voltage DC microgrids may be formed in some important areas. In order to achieve efficient consumption of distributed energy and improve system power supply reliability, multiple adjacent microgrids may be interconnected to form a multi-microgrid system or DC microgrid group. For a multi-DC microgrid operating...

Claims

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Application Information

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IPC IPC(8): H02J1/10
CPCH02J1/10
Inventor 栾思平涂春鸣苏适唐立军杨家全
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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