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Micro-grid black start control method and device, electronic equipment and storage medium

A control method and micro-grid technology, applied in the field of electric power, can solve problems such as the limited capacity of a single energy storage converter, the inability to operate with a large amount of load, and the small inertia of the system, so as to improve the load capacity and load time, and improve The effect of black start ability

Pending Publication Date: 2021-07-09
CHINA ENFI ENGINEERING CORPORATION
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

These power supplies have a fast response speed, which is of great significance to quickly restore the power supply of important loads; but their system inertia is small, and their overload capacity is also poor, and impact loads and grid failures will have a great impact on the operation of grid-connected inverters. Influence, leading to the difficulty of black start of microgrid
[0005] In addition, in the conventional black start process of the microgrid, a single energy storage converter is used to build voltage and frequency, and the capacity of a single energy storage converter is limited, so it cannot be operated with a large load

Method used

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  • Micro-grid black start control method and device, electronic equipment and storage medium
  • Micro-grid black start control method and device, electronic equipment and storage medium

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Embodiment Construction

[0038] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art.

[0039] The drawings are merely schematic illustrations of the invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus repeated descriptions thereof will be omitted. Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different network and / or processor means...

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Abstract

The invention relates to the technical field of electric power, and provides a micro-grid black start control method and device, electronic equipment and a storage medium. An energy storage converter unit of the micro-grid is configured with a droop control mode. The black start control method of the micro-grid comprises the following steps: converting the control mode of the energy storage converter unit into the droop control mode; determining a target energy storage converter group according to the capacity required by black start; starting the target energy storage converter group, charging the power transmission line, and closing the load line; starting a partial load according to the capacity of the target energy storage converter group; and starting the non-black-start micro-sources in sequence, and starting the residual load according to the capacity of the target energy storage converter group and the capacity of the non-black-start micro-sources. According to the invention, in the black start process of the micro-grid, a plurality of energy storage converters can be started together to establish and maintain the voltage and frequency of the power grid, so that the on-load capacity and the on-load time are greatly improved, and the black start capability of the micro-grid is improved.

Description

technical field [0001] The present invention relates to the field of electric power technology, in particular to a control method, device, electronic equipment and storage medium for black start of a microgrid. Background technique [0002] Black start means that after the power system is out of service due to a fault, without relying on the help of the external network, through the start-up of the units with self-starting ability in the system, the units without self-starting ability are driven, and the recovery range of the power system is gradually expanded, and finally the entire power system is realized. Restoration of the power system. [0003] The traditional power system uses a rotating electrical power source, such as a synchronous generator, which has a large inertia. When a short circuit occurs in the power system, the short-circuit current rise rate is low, so it can provide sufficient reserve capacity and smoothly realize black start. [0004] In a microgrid, g...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/32H02J3/14H02H7/26
CPCH02J3/388H02J3/32H02J3/144H02H7/26Y04S20/222Y02B70/3225
Inventor 刘志豪林瑶瑶
Owner CHINA ENFI ENGINEERING CORPORATION
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