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A virtual synchronous machine damping configuration method and device

A technology of a virtual synchronous machine and a configuration method, which can be applied to circuit devices, AC network circuits, electrical components, etc., and can solve problems such as low damping and low inertia

Active Publication Date: 2021-01-26
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The embodiment of the present invention provides a virtual synchronous machine damping configuration method and device, which are used to solve the technical problems of low inertia and low damping when distributed power sources are connected to distribution networks

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  • A virtual synchronous machine damping configuration method and device
  • A virtual synchronous machine damping configuration method and device
  • A virtual synchronous machine damping configuration method and device

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Embodiment Construction

[0044] Embodiments of the present invention provide a virtual synchronous machine damping configuration method and device, which are used to solve the technical problem of low inertia and low damping when distributed power sources are connected to distribution networks.

[0045] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0046] see figure 1 and figure 2 , an embodiment of a virtual sync...

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Abstract

The embodiment of the present invention discloses a virtual synchronous machine damping configuration method and device. The method includes: establishing a second-order switching cycle average model of the virtual synchronous machine, and obtaining the second-order switching cycle average model of the virtual synchronous machine according to the second-order switching cycle average model. A small-signal model, a small-signal expression of the output active power, a second small-signal model of the rocking equation and a power angle equation; the output active power change is calculated according to the small-signal expression, the first small-signal model, and the second small-signal model The fourth-order transfer function of the variable to the load-side frequency change; when the load-side frequency has a step, the response function of the output active power is obtained by performing inverse Laplace transformation on the fourth-order transfer function; the response function is calculated for the maximum value, Get the maximum expression of the output active power. The invention provides a clear and effective damping configuration method for matching the energy storage capacity of the virtual synchronous machine, which is convenient for people to configure damping for the virtual synchronous machine.

Description

technical field [0001] The invention relates to the field of distributed power generation control, in particular to a virtual synchronous machine damping configuration method and device. Background technique [0002] In recent years, due to the increasingly prominent world energy problems and the increasing environmental pressure, distributed power generation forms such as photovoltaic power generation and wind power generation have developed rapidly. Most of the output of distributed generation is DC, so it needs to be connected to the distribution network through grid-connected inverters. The development of distributed generation has made the penetration rate of inverters in the power system higher and higher, resulting in the occurrence of traditional power system structures. a huge change. The access of distributed power to the distribution network will bring about the problems of low inertia and low damping of the power system. In order to solve this problem, some sch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
CPCH02J3/381H02J2203/20
Inventor 唐酿盛超黄辉陈晓科黄明欣王红星张健朱良合袁敞赵天扬
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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