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Adaptive adjustment method of virtual synchronous machine and virtual synchronous machine including the same

A virtual synchronous machine, self-adaptive adjustment technology, applied in the direction of reducing/preventing power oscillation, single-network parallel feeding arrangement, etc., can solve problems such as inappropriate control parameters and oscillation

Inactive Publication Date: 2019-01-25
JIANGSU ELECTRIC POWER CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are also some problems in the virtual synchronous machine itself, such as the oscillation problem caused by inappropriate control parameters

Method used

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  • Adaptive adjustment method of virtual synchronous machine and virtual synchronous machine including the same
  • Adaptive adjustment method of virtual synchronous machine and virtual synchronous machine including the same
  • Adaptive adjustment method of virtual synchronous machine and virtual synchronous machine including the same

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Embodiment Construction

[0031] In order to make the purpose, technical solution and advantages of the application clearer, the application will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the 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.

[0032] Reference will now be made in detail to embodiments of the invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like parts throughout. Hereinafter, exemplary embodiments are described in order to explain the present invention by referring to the figures.

[0033] The invention is described hereinafter with reference to flowcharts of methods according to exemplary embodiments of the invention. It wil...

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Abstract

The invention relates to a self-adaptive adjustment method of a virtual synchronous machine, comprising the following steps: receiving a power difference value, wherein the power difference value is adifference value of an electromagnetic power and a power reference value; Fuzzifying the power difference to obtain the power difference fuzzy value; calculating The fuzzy solutions of damping coefficient and inertia coefficient according to the fuzzy value of power difference and fuzzy control rules. Defuzzing The fuzzy solution of damping coefficient and inertia coefficient and obtaining the exact solution of damping coefficient and inertia coefficient. By using fuzzy control algorithm, taking the difference e between the electromagnetic power Pe and the power pref as input and the dampingcoefficient Dp and the inertia coefficient J as output, the adaptive control of the parameters is realized when the operating condition or load changes, which makes the virtual synchronous machine have the ability of voltage active control.

Description

technical field [0001] The present invention relates to the technical field of control of a grid-connected inverter of a distribution network or a microgrid, in particular to a virtual synchronous machine self-adaptive adjustment method and a virtual synchronous machine including the method. Background technique [0002] Grid-connected inverters are widely used as the hub of new energy and distribution networks, and have become an indispensable part of modern power systems. However, due to the rapidity of power electronic devices, the "inertia" of the power system decreases, which has a certain adverse effect on the stable operation of the distribution network. [0003] To solve this problem, virtual synchronization machine technology was proposed. The virtual synchronous machine technology applies the electromagnetic equation and mechanical equation of the synchronous generator to the design of the control strategy, so that the grid-connected inverter can simulate the exte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/24
CPCH02J3/24H02J3/38
Inventor 曹良单杨尹雄马仲坤曹丹怡
Owner JIANGSU ELECTRIC POWER CO