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Photovoltaic virtual synchronous generator control parameter tuning method and system

A generator control and virtual synchronization technology, 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: 2018-10-02
NORTH CHINA ELECTRICAL POWER RES INST +3
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  • Description
  • 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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  • Photovoltaic virtual synchronous generator control parameter tuning method and system
  • Photovoltaic virtual synchronous generator control parameter tuning method and system
  • Photovoltaic virtual synchronous generator control parameter tuning method and system

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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 may also be illustrated or implemented by other different specific examples. Anyone skilled in the art is within the scope of the claims. The equivalent transformations made inside belong to the protection category of the present invention.

[0029] In the description of this specification, the description with reference to the terms "an embodiment", "a specific embodiment", etc. means that the specific feature, structure, material or characteristic described in combination with the embodiment or example is included in at least one implementation of the present invention Examples or examples. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the...

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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 setting 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 power grid is increasing. In order to improve the frequency stability and voltage stability of systems with large-scale photovoltaic power supplies, virtual synchronous generator technology can be used to control photovoltaic power generation equipment to form a photovoltaic virtual synchronous generator. Photovoltaic virtual synchronous generator inherits the advantages of inertia and frequency modulation of the synchronous machine, but also introduces the stability problems that the synchronous machine may cause. [0003] At present, there are many theoretical research results on photovoltaic virtual synchronous generators, but there are few rese...

Claims

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Application Information

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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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