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Virtual inertia configuration method based on Voronoi diagram centroid interpolation method

A technology of virtual inertia and configuration method, which is applied in the field of inertia configuration and can solve the problems of complex virtual inertia model and unsuitable for allocation calculation of a large number of series-parallel units.

Active Publication Date: 2019-03-26
CHINA THREE GORGES UNIV
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Problems solved by technology

However, its virtual inertia model is relatively complex, and it is not suitable for the distribution calculation of a large number of series and parallel units.

Method used

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  • Virtual inertia configuration method based on Voronoi diagram centroid interpolation method
  • Virtual inertia configuration method based on Voronoi diagram centroid interpolation method
  • Virtual inertia configuration method based on Voronoi diagram centroid interpolation method

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Embodiment Construction

[0045] A method for configuring virtual inertia based on Voronoi diagram center of gravity interpolation method, comprising the following steps:

[0046] Step 1. Establish the second-order dynamic model optimization model of the new energy system;

[0047] Step 2, establishing a system virtual inertia planning model;

[0048] Step 3. Solve the optimal value of the virtual inertia configuration of the system through the center of gravity interpolation method of the Voronoi diagram;

[0049] Step 4. Use the phase angle difference oscillation between nodes to verify the pros and cons of the results.

[0050] In step 1, only the mechanical characteristics of the power system are considered to establish the second-order dynamic model optimization model of the new energy system, and its mechanical characteristic equation is:

[0051]

[0052] In the formula: M, D are inertia coefficient and damping number respectively; P m is the mechanical input system power, P e is the elec...

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Abstract

A virtual inertia configuration method based on a Voronoi diagram centroid interpolation method. The method comprises establishing a new energy system second-order dynamic model optimization model; establishing a system virtual inertia planning model; solving the system virtual inertia configuration optimal value by the Voronoi diagram centroid interpolation method; and verifying the advantages and disadvantages of a result by a phase angle difference oscillation between nodes. The method is fast in convergence speed, high in result precision, automatic in search range adjustment, and less likely to fall into the local optimal solution.

Description

technical field [0001] The invention belongs to the field of inertia configuration, in particular to a virtual inertia configuration method based on a Voronoi diagram center of gravity interpolation method. Background technique [0002] With the development of new energy power generation technology at home and abroad, new energy power generation in some areas has accounted for more than 50% of the total local power generation, and the utilization rate of new energy in Chongming Island in China has even reached 100%. Most new energy sources are connected to the power system through inverters. Compared with synchronous generators, inverters have the characteristics of low inertia and low damping. When the penetration rate of new energy reaches a certain proportion, the system will have the characteristics of an inverter, and the low damping and low inertia characteristics will make its robustness worse, especially the ability to support frequency is significantly lower; in thi...

Claims

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Application Information

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IPC IPC(8): H02J3/38
CPCH02J3/381H02J2203/20
Inventor 马辉刘昊邦冯茂赵金刚
Owner CHINA THREE GORGES UNIV
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