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Island type microgrid small interference stability analysis method

An analysis method and technology of small disturbances, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problem of little research on the stability of small disturbances

Inactive Publication Date: 2016-08-31
XI AN JIAOTONG UNIV
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Problems solved by technology

There are relatively few studies on the small-disturbance stability of island microgrids based on master-slave control

Method used

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  • Island type microgrid small interference stability analysis method
  • Island type microgrid small interference stability analysis method
  • Island type microgrid small interference stability analysis method

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Embodiment Construction

[0045] Below in conjunction with accompanying drawing, implementation process of the present invention is described in further detail:

[0046] see figure 1 and figure 2 , applying the small-disturbance stability analysis method of the island-type micro-grid under the large-scale energy storage configuration proposed by the present invention under master-slave control, it is necessary to first obtain the component parameters of the micro-grid system and the operating parameters of the micro-grid system, including:

[0047] Component parameters of the inverter;

[0048] Microgrid system topology and line parameters;

[0049] The real-time load in the microgrid system and the real-time active output and reactive output data of the micro-power supply.

[0050] Step 1: Obtain the component parameters of the inverter, and establish a small disturbance dynamic model of the inverter under different control modes, including:

[0051] 1) Establish the small disturbance dynamic mod...

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Abstract

The invention discloses an island type microgrid small interference stability analysis method, comprising: first, employing a master-slave control strategy for a microgrid system, wherein a main power supply employs droop control, and other power supplies employ PQ control, and an interface inverter control model substitutes for each power supply model in the microgrid system; second, dividing the microgrid system into inverter, network and load modules, respectively establishing a small interference dynamic model for each module, and merging to obtain a complete microgrid system small interference stable model; and finally employing a characteristic value analysis method to analyze microgrid system small interference stability. The method employs a special master-slave control method to analyze microgrid system small interference stability, find microgrid system key links, and provide theoretical basis for microgrid system control parameter optimal configuration.

Description

technical field [0001] The invention relates to the field of stability analysis in a micro-grid system, in particular to a small-disturbance stability analysis method for an island-type micro-grid. Background technique [0002] In recent years, distributed power generation has been widely used. Microgrid, as an organic combination of distributed power sources, has attracted extensive research at home and abroad. Most of the distributed power sources in the microgrid are connected through inverters, and the system inertia is small, and it is prone to oscillation and instability when disturbances occur. It is necessary to analyze the stability of small disturbances. [0003] Small disturbance stability is an important index of traditional power system stability criterion, and there are already a series of mature theoretical basis and analysis methods. However, in the microgrid, the operation mode can be switched, and the power supply is no longer based on the rotating motor,...

Claims

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Application Information

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IPC IPC(8): H02J3/38
CPCH02J3/38H02J3/388H02J2203/20
Inventor 王建学李爽张忠
Owner XI AN JIAOTONG UNIV
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