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Inverter modeling method including amplitude limiter and related device

A modeling method and limiter technology, applied in circuit devices, complex mathematical operations, AC network circuits, etc., can solve problems such as inability to apply inverters, and achieve the effect of solving continuity problems

Active Publication Date: 2020-09-04
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Claims
  • Application Information

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Problems solved by technology

[0004] This application provides an inverter modeling method including a limiter and related devices, which are used to solve the problem of inverter modeling through differential equations in the prior art, which requires continuity of the inverter model and cannot be applied to include Technical Problems of Inverter with Limiter

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  • Inverter modeling method including amplitude limiter and related device
  • Inverter modeling method including amplitude limiter and related device
  • Inverter modeling method including amplitude limiter and related device

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Embodiment Construction

[0040] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0041] For ease of understanding, see figure 1 , an embodiment of an inverter modeling method including a limiter provided by the present application, including:

[0042] Step 101, establishing a differential equation model of the voltage and current control loop in the inverter.

[0043] It should be noted that differential equations are a better analytical meth...

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Abstract

The invention discloses an inverter modeling method including an amplitude limiter and a related device. The method comprises the steps of building a differential equation model of a voltage and current control loop in an inverter, wherein the differential equation model comprises a piecewise function of a saturation amplitude limiter; determining the upper and lower boundaries and a critical saturation point of the saturation limiter based on the piecewise function of the saturation limiter; performing continuous function conversion on the piecewise function based on a Sigmoid function, and configuring parameters in the continuous function obtained by conversion through the upper and lower bounds of the saturation limiter and a critical saturation point to obtain a continuous function ofthe saturation limiter; and replacing the piecewise function of the saturation limiter with the continuous function of the saturation limiter to obtain a continuous differential equation model, thereby solving the technical problem that the inverter modeling through the differential equation requires that the inverter model has continuity and cannot be applied to the inverter comprising the limiter in the prior art.

Description

technical field [0001] The present application relates to the technical field of power equipment modeling, and in particular to an inverter modeling method including a limiter and a related device. Background technique [0002] Due to the impact of the fossil energy crisis, people began to study and utilize new energy sources. As one of the core equipment of the microgrid, the inverter can convert renewable energy such as wind power and light energy into electric energy, and transmit the electric energy to the user or the public grid. The inverter is an important device for utilizing new energy. In recent years, to attract widespread attention. [0003] Compared with the traditional grid, the microgrid is a small-scale system, but it also has the basic characteristics of power system operation. Inverters distributed in the microgrid, that is, distributed microsources, can provide voltage and frequency support for the normal operation of the microgrid, and can also directly...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/38G06F17/13G06F17/17
CPCH02J3/00H02J3/38G06F17/13G06F17/17H02J2203/20
Inventor 谈赢杰徐敏郭祚刚雷金勇袁智勇叶琳浩
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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