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A virtual synchronous generator control method and control system with adaptive parameters

A technology of self-adaptive parameters and virtual synchronization, applied in photovoltaic power generation, electrical components, circuit devices, etc., can solve the problem of lack of self-adaptive adjustment parameters

Active Publication Date: 2020-10-20
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, an object of the present invention is to propose a control method of a virtual synchronous generator with adaptive parameters, to solve the defect of lack of adaptive adjustment parameters in the power system in the prior art

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  • A virtual synchronous generator control method and control system with adaptive parameters
  • A virtual synchronous generator control method and control system with adaptive parameters
  • A virtual synchronous generator control method and control system with adaptive parameters

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Embodiment Construction

[0051] The following description and drawings illustrate specific embodiments of the invention sufficiently to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely represent possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. The scope of embodiments of the present invention includes the full scope of the claims, and all available equivalents of the claims. These embodiments of the present invention may be referred to herein, individually or collectively, by the term "invention", which is for convenience only and is not intended to automatically limit the application if in fact more than one invention is disclosed The scope is any individual invention or inventive concept.

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Abstract

The invention provides a virtual synchronous generator control method and control system with adaptive parameters, and relates to the technical field of photovoltaic power generation grid connection.The virtual synchronous generator control method includes the steps: deriving an analytical expression of one or more parameter indicators in the frequency-active step response relationship accordingto an active loop small signal model for the virtual synchronous generator; on the basis of the obtained analytical expression of the parameter indicators, inputting control parameters, and obtainingthe output values of a set of parameter indicators; sending the obtained output values of the parameter indicators to a parameter optimization link for optimization processing, and obtaining optimizedvalues of the set of parameter indicators; and based on the obtained optimized values of the parameter indicators, controlling the virtual synchronous generator. The virtual synchronous generator control method with adaptive parameters enables the inverter to provide effective frequency support for the power system according to the requirements for different frequency and active response characteristics, thus improving the grid-connected adaptability of the virtual synchronous generator control method, and being beneficial to security and stability of the grid in the case of large-scale of new energy sources connected to the grid.

Description

technical field [0001] The invention relates to the technical field of grid-connected photovoltaic power generation, in particular to a control method and control system for a virtual synchronous generator with adaptive parameters. Background technique [0002] With the rapid development of the new energy industry and the maturation of new energy grid-connected control technologies, the proportion of new energy power generation dominated by photovoltaic and wind power in the power system is gradually increasing. Since the new energy power station is connected to the grid to replace the original synchronous generator set in the power system, the equivalent inertia of the system is reduced, resulting in severe frequency fluctuations when the load changes. In addition, since new energy units mostly operate in the maximum power point tracking mode and operate decoupled from the grid frequency, they cannot provide support for the grid frequency and endanger the frequency stabilit...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
CPCH02J3/383Y02E10/56
Inventor 李旭涛胡正阳焦龙陈宁曲立楠任勇葛路明梁剑薛飞张迪
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY
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