A method and device for analyzing dynamic characteristics of a photovoltaic power generation system

A photovoltaic power generation system and analysis method technology, applied in photovoltaic power generation, circuit devices, electrical components, etc., can solve the problems of unbalanced photovoltaic power generation system dynamic characteristics, can not fully reflect the grid voltage, etc., achieve stable phase-locked loop, slow down abnormal The effect of linear mutation

Active Publication Date: 2021-09-03
CHINA ELECTRIC POWER RES INST +1
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  • Claims
  • Application Information

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Problems solved by technology

Since the above models do not consider the negative sequence network, they cannot fully reflect the dynamic characteristics of the photovoltaic power generation system when the grid voltage is unbalanced or asymmetrical.

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  • A method and device for analyzing dynamic characteristics of a photovoltaic power generation system
  • A method and device for analyzing dynamic characteristics of a photovoltaic power generation system
  • A method and device for analyzing dynamic characteristics of a photovoltaic power generation system

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Embodiment Construction

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, 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 described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0029] A method and system for analyzing dynamic characteristics of a photovoltaic power generation system provided by an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0030] figure 1 It is a flowchart of a method for analyzing the dynamic characteristics of a photovolta...

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Abstract

The invention provides a method and device for analyzing the dynamic characteristics of a photovoltaic power generation system. The method includes obtaining the positive-sequence synchronous phase angle of the power grid and the negative-sequence phase angle of the power grid; calculating the injection current command; calculating the operating characteristic index of the photovoltaic power generation system; the device It includes a vector transformation module, a positive and negative double-sequence full digital phase-locked loop, a current calculation module and a dynamic characteristic analysis module. Compared with the prior art, the method and device for analyzing the dynamic characteristics of a photovoltaic power generation system provided by the present invention have the function of positive / negative sequence decoupling and blocking, and can perform positive / negative sequence blocking under serious faults, reflecting the effect of inertia increase , and can also more comprehensively obtain the dynamic characteristics of the photovoltaic power generation system when the grid is symmetrical / asymmetrical.

Description

technical field [0001] The invention relates to the technical field of new energy power generation, in particular to a method for acquiring dynamic characteristics of a photovoltaic power generation system. Background technique [0002] As the scale of photovoltaic power generation access to the grid continues to increase, its impact on the grid has received extensive attention and research. Recently, one of the main trends in the development of photovoltaic power generation technology is the study of the overall operating characteristics of photovoltaic power generation systems. The focus has shifted from the study of operating characteristics under normal grid conditions to the research of non-off-grid or ride-through operating characteristics under grid fault conditions. At present, based on the research on the operating characteristics of photovoltaic power generation systems at home and abroad, several dynamic models suitable for power grid simulation analysis have been...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/38G06F30/20G06F113/04
CPCG06F30/367H02J3/383H02J3/00H02J2203/20Y02E10/56
Inventor 刘艳章赵大伟钱敏慧姜达军张磊朱凌志吴子成陈宁葛路明韩华玲罗芳曲立楠何洁琼于若英
Owner CHINA ELECTRIC POWER RES INST
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