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Grid Frequency Response

A frequency response, grid frequency technology, used in wind power generation, photovoltaic power generation, electrical components, etc.

Active Publication Date: 2020-03-10
REACTIVE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This represents a delay in the determination of the frequency response characteristics; this makes it difficult for network operators, etc. to react in a timely manner to changes in the frequency response characteristics

Method used

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example

[0207] refer to Figure 5 , shows an example method for determining the frequency response characteristics (eg, inertia or stiffness) of a specified region of an electrical grid at a specified time.

[0208] Figure 5 A power unit 119 is shown connected to a part of the synchronous grid 504 via a modulation device 118 . Modulation device 118 can be used with the Figure 2a The modulation setup is shown in the same, but in Figure 5 In , only data memory 204 and modulator 208 are shown for clarity. A code 502 is stored in the data memory 204 of the modulating device 118, assigned for use by the group of power units 119, and transmitted to the modulator 208 to generate a power modulation signal at the point where the modulating device is connected to the grid At point 506, the signal is added to the power flow of the remaining grid.

[0209] As mentioned above, power modulation causes a corresponding frequency modulation. These modulated signals propagate through the measu...

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Abstract

Methods and apparatus for determining inertia within a synchronous region of an electrical grid are described. Modulate the power flow to and / or from the group of one or more power cells based on the sequence of control signals ( FIG. 4 a ) and measure the frequency characteristics related to the frequency of the flowing current in the grid ( FIGS. 4 b - 4 d solid line). A frequency response characteristic associated with at least one region of the grid is determined based on the measured frequency characteristic and the determined magnitude characteristic. The inertia in the region of the grid from which the power unit is located is determined to be low (Fig. 4b), medium (Fig. 4c) or high (Fig. 4d) and enables the frequency response characteristics in the synchronous region of the grid to be readily determined.

Description

technical field [0001] The invention relates to a method and a device for determining frequency response characteristics within an electrical power grid. Background technique [0002] The exchange of electricity between suppliers and consumers through a distribution network or grid. In such a grid, electricity is typically supplied by a combination of larger-capacity power plants and smaller-capacity renewable energy sources. [0003] Generators in large power plants (eg, fossil fuel fired or nuclear power plants) typically include higher mass rotating components that rotate at higher speeds, hence the term spinning generation. During its normal operation, a rotating electrical generator stores a relatively large amount of kinetic energy. Smaller renewable energy sources (wind turbines and solar generators) store far smaller amounts of energy or even store no energy at all. [0004] Typically, the grid operates with a nominal grid frequency that is uniform throughout the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00G01R19/25
CPCG01R19/2513H04B3/546H04B2203/5416H02J2310/12H02J13/00004H02J13/00034Y02E10/56H02J13/00002H02J3/144H02J2310/58G01R27/28H02J3/12H02J3/14Y02E10/76
Inventor 海基·霍莫尤卡·阿拉孔蒂奥拉
Owner REACTIVE TECH