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Virtual synchronous generator-based photovoltaic power control strategy

A technology of virtual synchronous power generation and virtual synchronization, applied in photovoltaic modules, photovoltaic power generation, electrical components, etc., can solve the problems of flexible and stable operation of micro-grids, and achieve the effect of maintaining system voltage and frequency and realizing system power output

Inactive Publication Date: 2016-02-03
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the micro-source control requirements of different operation modes of the micro-grid, it can be seen that the traditional photovoltaic power generation control method is difficult to meet the requirements of flexible and stable operation of the micro-grid.

Method used

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  • Virtual synchronous generator-based photovoltaic power control strategy
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Embodiment Construction

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0038] In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or elem...

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Abstract

The invention discloses a virtual synchronous generator-based photovoltaic power control strategy, which comprises a photovoltaic power generation system, an energy storage device and an inversion device, wherein a power supply output end of the photovoltaic power generation system is respectively connected with an energy storage end of the energy storage device and an inversion end of the inversion device; the output end of the inversion device is connected with a power grid; the inversion device carries out a power control through a virtual synchronous generator method; the output power of the inversion device is adjusted through the virtual synchronous generator method to reach a stable state; the output power is adjusted according to load fluctuation; stable frequency and voltage of the photovoltaic system can be maintained; and the grid-connected generation performance of a photovoltaic power station is effectively improved.

Description

technical field [0001] The invention relates to solar photovoltaic grid-connected power generation technology, in particular to a photovoltaic power supply control strategy based on a virtual synchronous generator. Background technique [0002] Solar photovoltaic grid-connected power generation technology is one of the hot spots in new energy research and development at present. However, there are great differences between photovoltaic power generation systems and traditional power generation methods. Solar photovoltaic power generation has the characteristics of intermittent, random, and low dispatchability. Power output is often subject to external environmental factors. Changes in light intensity and ambient temperature will cause fluctuations in the power output of photovoltaic power generation systems. Especially in cloudy weather, power fluctuations in photovoltaic power generation will affect the power supply of users in the microgrid. Quality has a serious negative i...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02S40/32
CPCY02E10/56
Inventor 杨立滨杨军杨子康熊兰吴雄李正曦李春来张节潭孟可风梁英
Owner STATE GRID CORP OF CHINA
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