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Method and system for tuning control parameters of photovoltaic virtual synchronous generator

A technology of generator control and virtual synchronization, which is applied in control systems, general control systems, control/regulation systems, etc., to avoid grid-connected stability problems and improve frequency support performance

Active Publication Date: 2020-11-27
NORTH CHINA ELECTRICAL POWER RES INST +3
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention is used to solve the problem of setting the control parameters of the photovoltaic virtual synchronous generator mainly through experience or trial and error in the prior art. There is a problem of grid stability

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  • Method and system for tuning control parameters of photovoltaic virtual synchronous generator
  • Method and system for tuning control parameters of photovoltaic virtual synchronous generator
  • Method and system for tuning control parameters of photovoltaic virtual synchronous generator

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Embodiment Construction

[0028] In order to make the technical features and effects of the present invention more obvious, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings. The present invention can also be described or implemented in other different specific examples. The equivalent transformations done within all belong to the protection category of the present invention.

[0029] In the description of this specification, reference to the terms "an embodiment", "a specific embodiment" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one implementation of the present invention. example or examples. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics descri...

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Abstract

The invention provides a photovoltaic virtual synchronous generator control parameter tuning method and system. The method comprises steps: the minimum damping ratio ximin is acquired, and tuning ranges of an active droop coefficient KDp, virtual inertia J, virtual resistance Rv and virtual inductance Lv are acquired; the KDp and the J are set to be the maximum values, and the Rv is set to be theminimum value; a state space matrix An*n of a photovoltaic virtual synchronous generator grid-connected system is built, and according to the state space matrix An*n, a group of damping ratio expressions is obtained; a feasible domain U1 of the Lv is calculated; the feasible domain U1 of the Lv and the tuning range UL are subjected to intersection, if the intersection result is empty, the value ofthe J is reduced, the former step is returned to calculate the feasible domain U1 of the Lv again, and if the intersection result is not empty, the value of the virtual inductance Lv is set accordingto the intersection result; a feasible domain U2 of the Rv is calculated and obtained; and the feasible domain U2 of the Rv and the tuning range UR are subjected to intersection, and the value of thevirtual resistance Rv is set according to the intersection result. Thus, photovoltaic virtual synchronous generator control parameter tuning can be effectively and quickly realized.

Description

technical field [0001] The invention relates to the field of photovoltaic system stability, in particular to a method for adjusting control parameters of a photovoltaic virtual synchronous generator (VSG). Background technique [0002] In order to solve energy and environmental problems, the proportion of photovoltaic power sources in the grid is increasing. In order to improve the frequency stability and voltage stability of the system with large-scale photovoltaic power supply, the virtual synchronous generator technology can be used to control the photovoltaic power generation equipment to form a photovoltaic virtual synchronous generator. The photovoltaic virtual synchronous generator inherits the advantages of the synchronous machine's inertia and frequency modulation, but at the same time introduces the stability problems that may be caused by the synchronous machine. [0003] At present, there are many theoretical research results on photovoltaic virtual synchronous ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/02H02P9/00H02J3/40
CPCG05B13/02H02J3/40H02P9/00
Inventor 孙大卫刘辉江浩宋鹏葛俊李智朱斯吴林林
Owner NORTH CHINA ELECTRICAL POWER RES INST
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