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Self-discipline floating microgrid system and control method thereof

A microgrid and control unit technology, applied in the field of self-disciplined floating microgrid system and its control, can solve the problems of complex control parameter configuration and high investment cost, and achieve the effect of reducing control objects and complexity

Active Publication Date: 2020-04-24
SHANGHAI MINGHUA ELECTRIC POWER TECH & ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The configuration of control parameters is relatively complicated, and at the same time, the number of controllable power conversion devices equal to the number of distributed power sources is required, and the investment cost is relatively high

Method used

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  • Self-discipline floating microgrid system and control method thereof
  • Self-discipline floating microgrid system and control method thereof

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Embodiment Construction

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0038] see figure 1 , figure 1 It is a schematic diagram of an autonomous floating DC microgrid provided by an embodiment of the present invention.

[0039] The DC microgrid includes:

[0040] Detection module 100: used to detect the bus voltage of the busbar and the main busbar;

[0041] DC main bus (DC Bus1) 301; DC bus (DC Bus2) 302;

[0042] A first execution module (Breaker1) 201 connecting the DC main bus 301 and the DC bus 302;

[0043] The ene...

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Abstract

The invention relates to a self-discipline floating microgrid system and a control method thereof. The system comprises a bus bar, a main bus, an alternating current bus, a power generation device which is connected with the bus bar, an energy storage device which is connected with the main bus, a first control unit which connects the bus bar and the main bus, a second control unit which is connected with the bus bar and the alternating current bus, a converter device which is connected with the alternating current bus and the main bus, a load which is connected with the main bus, and a connecting device which is used for connecting the alternating current bus to an external alternating-current power grid. Compared with the prior art, the system provided by the invention has the advantagesthat a micro-grid centralized control system is not needed; control objects and complexity are reduced to the maximum extent; a natural rectification outlet of the external alternating-current powergrid is used as a micro-grid voltage supporting base; and systematic risks are reduced while investment of interface power electronic equipment is reduced.

Description

technical field [0001] The invention relates to the technical field of DC microgrids, in particular to an autonomous floating microgrid system and a control method thereof. Background technique [0002] With the maturity and wide application of distributed energy technology, the application of micro-grid technology based on new energy has also developed rapidly. Among them, DC micro-grid has become a research and application hotspot due to its natural advantages. In the DC microgrid, the DC power supply is the power supply mode of the main network, and a large number of distributed DC power supplies and energy storage systems directly supply power to the DC loads through the DC main grid. [0003] In the DC microgrid, the bus voltage is the only index to measure the power balance. The stability of the voltage in the grid depends on the power balance between the power supply side and the load side, including steady-state stability and dynamic stability. Maintain floating wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/12
CPCH02J1/12
Inventor 张健张翼
Owner SHANGHAI MINGHUA ELECTRIC POWER TECH & ENG
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