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Control method of microgrid and microgrid group

A micro-grid group and control method technology, applied in photovoltaic power generation, wind power generation, electrical components, etc., can solve the problem of lack of real-time control model of micro-grid group, achieve the effect of improving power supply time, realizing absorption and reducing impact

Active Publication Date: 2018-11-16
GUANGXI POWER GRID ELECTRIC POWER RES INST +1
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Problems solved by technology

Another invention proposes a microgrid system and its microgrid system control method. The designed system is mainly used to smooth the fluctuation of microgrid switching from microgrid grid connection to island, and lacks a comprehensive real-time control model of microgrid group

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  • Control method of microgrid and microgrid group
  • Control method of microgrid and microgrid group
  • Control method of microgrid and microgrid group

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Embodiment Construction

[0048] In order to better understand the present invention, the present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0049] A control method for a microgrid and a microgrid group includes a single microgrid operation control method and a microgrid group operation control method, specifically as follows:

[0050] (1) The grid-connected operation control method of a single microgrid: the distributed power supply works in the P-Q control mode, the energy storage unit works in the P-Q control mode, and the energy storage adjustment power of the energy storage unit is determined by a fuzzy algorithm;

[0051] (2) The off-grid operation control method of a single microgrid: the distributed power supply works in the P-Q control mode, the energy storage unit works in the V-f control mode, and the energy storage adjustment power of the energy storage unit is determined by a fuzzy algorithm;

[0052] (3) if figure 1 As sh...

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Abstract

The invention relates to the technical field of running control of a microgrid, in particular to a control method of a microgrid and a microgrid group. By combining droop control characteristic of aninverter in the microgrid, a fuzzy control-based dynamic stability control method of the microgrid is proposed, the problems of large data information, various types, high dimension and difficulty inmodeling of the microgrid are solved, moreover, the power change in the network can be rapidly responded, absorption of power fluctuation is achieved, and voltage oscillation brought by small power fluctuation is reduced. The invention proposes a safety control strategy under grid-connected and off-network conditions of the microgrid and the microgrid group, a corresponding control target is proposed according to different running states of a sub-microgrid in the group, control measure is proposed according to inequality constraints under different states, a power system is enabled to automatically correct when the control target is deviated, the influence on the power system when entering an emergency state or a state to be restored is reduced, and the time power supply of an important load is improved.

Description

technical field [0001] The invention relates to the technical field of micro-grid operation control, in particular to a control method for a micro-grid and a micro-grid group. Background technique [0002] The scale of the microgrid group is small, relying on the distribution network for power supply under the condition of group grid connection, the energy can be distributed and managed reasonably, but the load and distributed generator (Distribution Generator, DG) power fluctuations in the network will still cause some damage to the system. Especially under the condition of group off-grid, without the support of the distribution network, the fluctuations that cannot be stabilized in time may even cause the system to fluctuate greatly and lose stability. [0003] The micro-grids in the micro-grid cluster system can often affect each other. The number and scale of micro-grids vary greatly, and the types of distributed power sources included are different, so the control metho...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/28H02J3/24
CPCH02J3/383H02J3/386H02J3/24H02J3/28H02J3/381H02J3/388H02J2203/20Y02E10/56Y02E10/76
Inventor 陈卫东高立克梁朔文凌锋欧阳健娜肖静杨艺云迟若飞陈绍南郑毅秦丽文郭敏高源良
Owner GUANGXI POWER GRID ELECTRIC POWER RES INST
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