Black-start method, energy management system and off-grid light storage micro-grid with shared alternating-current bus

An energy management system and a common AC bus technology, applied in the direction of AC network circuit, AC network load balancing, energy reserve, etc. Unable to achieve black start and other problems, to achieve the effect of improving black start ability

Active Publication Date: 2014-06-04
SUNGROW POWER SUPPLY CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] However, when the power of the storage battery 11 is insufficient, the bidirectional energy storage converter 12 cannot perform V / F control to establish the microgrid voltage and frequency, thus causing the off-grid optical storage microgrid with the common AC bus to fail to achieve black start.

Method used

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  • Black-start method, energy management system and off-grid light storage micro-grid with shared alternating-current bus
  • Black-start method, energy management system and off-grid light storage micro-grid with shared alternating-current bus
  • Black-start method, energy management system and off-grid light storage micro-grid with shared alternating-current bus

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Embodiment Construction

[0025] For reference and clarity, technical terms, abbreviations or abbreviations used hereinafter are summarized as follows:

[0026] V / F control: voltage / frequency control;

[0027] P / Q control: active / reactive power control;

[0028] MPPT: Maximum Power Point Tracking, maximum power point tracking.

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] see figure 2 , Embodiment 1 of the present invention discloses a black start method for an off-grid optical storage microgrid sharing an AC bus, so ...

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Abstract

The embodiment of the invention discloses a black-start method of an off-grid light storage micro-grid with a shared alternating-current bus. The black-start method comprises the steps that the electric quantity in a storage battery is obtained, and whether the electric quantity in the storage battery is large enough to support generation of a micro-grid voltage and micro-grid frequency by a bidirectional energy storage converter is judged; if not, first black-start logic is started, wherein the starting of the first black-start logic comprises the step of controlling a photovoltaic inverter to be in a V/F control mode and the bidirectional energy storage converter to be in a P/Q control mode, so that the black-start ability of the off-grid light storage micro-grid with the shared alternating-current bus is improved when the electric quantity in the storage battery is insufficient. In addition, the invention further discloses an energy management system and the off-grid light storage micro-grid with the shared alternating-current bus.

Description

technical field [0001] The present invention relates to the technical field of microgrid black start, and more specifically, to a black start method for an off-grid optical storage microgrid sharing an AC bus, an energy management system, and an off-grid optical storage microgrid sharing an AC bus. storage microgrid. Background technique [0002] A microgrid refers to a small-scale power generation and distribution system that integrates distributed generators, loads, and energy management systems. It can be connected to a large power grid and run in parallel, or it can be isolated from the large power grid. [0003] The process of re-establishing the voltage and frequency of the micro-grid and finally recovering the operation of the micro-grid that is out of service due to a fault is called the black start of the micro-grid. Among them, the black start of an isolated microgrid (also known as an off-grid microgrid) needs to rely on its own distributed generators to provide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/32
CPCY02E70/30H02J3/32H02J2310/10H02J2300/26H02J3/381Y02E10/56H02J3/388
Inventor 余勇曹伟洪婷婷江涛朱信捷
Owner SUNGROW POWER SUPPLY CO LTD
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