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Microgrid load shedding method, device, system and storage medium

A technology for microgrid and power grid operation, applied in the field of microgrid, can solve problems such as frequency stability of microgrid that cannot be completely solved

Inactive Publication Date: 2020-12-18
NR ELECTRIC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, even if the microgrid is equipped with a certain proportion of energy storage components, it cannot completely solve the problem of frequency stability of the microgrid.

Method used

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  • Microgrid load shedding method, device, system and storage medium
  • Microgrid load shedding method, device, system and storage medium
  • Microgrid load shedding method, device, system and storage medium

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Embodiment Construction

[0082] The microgrid load shedding method, device, system, and storage medium provided by the embodiments of the present invention are mainly used in the microgrid power supply system. Through real-time monitoring of loads, power supplies, switches, and energy storage components, etc., the emergency situation of the microgrid can be obtained. When the frequency drops to the set frequency value, the active power shortage can be achieved by removing the load according to the priority order or using the power compensation of the energy storage element to achieve the balance of the active power deficit in the microgrid and restore the microgrid frequency value. To the rated value, maintain the frequency of the microgrid within a reasonable fluctuation range, so as to realize the stable operation of the microgrid. The study found:

[0083] (1) The low-frequency load shedding function is integrated in the line protection device. When the line protection device detects that the frequ...

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Abstract

The embodiment of the invention discloses a micro-grid load reducing method. The method comprises the following steps: monitoring the grid frequency of a micro-grid; receiving operation parameters ofthe grid sent by an intelligent monitoring terminal; when the frequency of the grid decreases to a set frequency value, obtaining an active power shortage according to the operation parameter of the grid; according to the active power shortage and the priority order of shedding load, determining a load to be removed; and transmitting a load shedding instruction for the load to be removed to the intelligent monitoring terminal. The embodiment of the invention also discloses a micro-grid load reducing device and system and a storage medium.

Description

technical field [0001] The invention relates to the technical field of micro-grids, in particular to a load-shedding method, device, system and storage medium for a micro-grid. Background technique [0002] With the depletion of the earth's resources and people's concern about environmental issues, the access to renewable energy has attracted more and more attention from all countries in the world. A microgrid is a small power generation and distribution system composed of distributed power sources, energy storage devices, energy conversion devices, loads, monitoring and protection devices, etc. [0003] Compared with the large power grid, the micro-grid has natural advantages. Its scale is much smaller than that of the large power grid. The number of power sources and loads is limited, and the grid structure is simple, so it is easy to monitor and control the micro-grid. The frequency stability is of great significance to the stable operation of the microgrid. In the grid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/14
CPCH02J3/14Y02B70/3225Y04S20/222
Inventor 魏阳徐光福余群兵陈俊朱皓斌华秀娟姜淼
Owner NR ELECTRIC CO LTD
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