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Multi-port intelligent microgrid energy switch and control method and system thereof

A micro-grid and multi-port technology, applied in parallel operation of DC power supplies, current collectors, electric vehicles, etc., can solve the problems of large system occupation, large investment, and unfavorable energy Internet construction

Pending Publication Date: 2021-03-12
CHINA ELECTRIC POWER RES INST +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Microgrid is the basic unit of regional energy Internet. Traditional microgrid construction schemes are mostly based on dedicated power electronic grid-connected interfaces such as photovoltaic converters, energy storage converters, and wind turbine converters to realize new energy grid-connected. The system occupies a large area. , the investment is large, which is not conducive to the construction of energy Internet

Method used

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  • Multi-port intelligent microgrid energy switch and control method and system thereof
  • Multi-port intelligent microgrid energy switch and control method and system thereof
  • Multi-port intelligent microgrid energy switch and control method and system thereof

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Embodiment 1

[0068] Based on intensification and one or two fusion ideas, the present invention proposes a multi-port intelligent micro-grid energy switch that integrates an access to photovoltaic, AC power, energy storage, multi-voltage grade DC load and AC load. At the same time, a plurality of complementary operation control strategies for this energy switch are proposed. The policy is integrated into an energy switch that implements the first two-two fusion, which can realize the source reserve between the exchange / DC power supply and the intersection / DC load. Coordination control and energy optimization management function; use dual storage structure, and jointly maintain the DC bus voltage through power salary control, facilitating seamless and closing network switching, providing technical support for future regional energy Internet construction.

[0069] Such as figure 1 As shown, a multi-port intelligent micro-grid energy switch provided by the present invention includes: photovo...

Embodiment 2

[0099] The present invention proposes a specific structure of an energy switch such as figure 1 As shown, the device consists of six single-converters, wherein DD1, DD2, DD3, DD4 is a photovoltaic chopper, a first storage chopper, a second storage chopper, 400V The output chopper, DA1, DA2 are host inverters and slave inverters, all of which are three-phase three-wire, and the transformer becomes three-phase four-wire, which can be loaded. The 48V DC module is input to single-phase AC 220V input. Switches QF1 and QF2 are input and output switches of photovoltaic chopping, switches QF2 and QF5 are the input and output switches of the first storage chopper, switch QF3 and QF6 are input and output switches of the second storage chopper. , Switch QF9 and QF10 are input and output switches of 400V output choppers, switch QF7 is the direct current input switch of the host inverter, switch QF8 is the DC input switch of the slave inverter, QF11 is three-phase four-wire AC load The switch...

Embodiment 3

[0103] Based on the same inventive conception, the present invention also provides a control system for multi-port intelligent microgrid energy switches, including:

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Abstract

The invention discloses a multi-port intelligent microgrid energy switch and a control method and system thereof. The energy switch comprises a photovoltaic chopper, at least two energy storage choppers, an output chopper, a host inverter, a slave inverter and a control chip. One end of the photovoltaic chopper is connected with one end of the host inverter, one end of one energy storage chopper is connected with one end of the slave inverter, and one end of the other energy storage chopper is connected with one end of the output chopper; the other end of the host inverter is connected with the other end of the slave inverter to generate three paths of alternating current ports and a first path of direct current port, and the other end of the output chopper generates a second path of direct current port; and the other ends of the photovoltaic choppers are externally connected with a photovoltaic power station, and the other ends of the two energy storage choppers are respectively connected with an external energy storage device. According to the invention, new energy grid connection is realized, the occupied area of the system is reduced, the investment cost is reduced, and the construction work of the energy internet is facilitated.

Description

Technical field [0001] The present invention relates to the field of microgrid and energy exchange, and more particularly to a multi-port intelligent micro-grid energy switch and a control method thereof. Background technique [0002] Energy Internet is a new power network, oil network, natural gas network such as distributed energy acquisition device, distributed energy storage device, and various types of power networks, oil networks, natural gas networks, such as distributed energy acquisition devices, distributed energy storage devices, and various types of power. Nodes are interconnected to achieve energy-parallel exchange and sharing networks for energy bidirectional flow. Energy Internet has been rapidly developed in recent years. Different researchers have achieved energy Internet from different perspectives, and is committed to establishing a new generation of smart networks that are core, energy and information depth fusion, and interconnection. The microgrid is the bas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J4/00H02J3/38H02J3/02H02J1/10H02J7/35H02J5/00
CPCH02J1/10H02J3/02H02J4/00H02J5/00H02J7/35Y02E10/56
Inventor 丁保迪季宇苏剑刘海涛吴鸣熊雄张颖胡转娣管荑程艳
Owner CHINA ELECTRIC POWER RES INST
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