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Smart grid fractional electrical spring that does not require non-critical loads

A technology for non-critical loads and smart grids, which is applied in the directions of reducing flicker of AC networks and reducing/preventing power oscillations. It can solve the problems of limited number of non-critical loads and restrictions on the application of electric springs, etc., to achieve flexible and convenient use, avoid impact, The effect of guaranteed voltage

Pending Publication Date: 2018-09-25
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

Therefore, the above-mentioned electric spring must be connected in series with non-critical loads to play a role in suppressing grid fluctuations. However, due to the limited number of non-critical loads, and the electrical spring needs to make non-critical loads work in an abnormal state when suppressing grid fluctuations, these disadvantages are extremely serious. Greatly limits the application of electrical springs in smart grids

Method used

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  • Smart grid fractional electrical spring that does not require non-critical loads
  • Smart grid fractional electrical spring that does not require non-critical loads
  • Smart grid fractional electrical spring that does not require non-critical loads

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with specific examples.

[0017] Such as figure 1 As shown, the smart grid fractional-order electrical spring without non-critical load provided by this embodiment includes a voltage sampler 1, a controller 2 and a fractional-order impedance 3 with adjustable order, and the controller 2 is connected with the voltage sampler 1 respectively. Connected to the fractional impedance 3, the voltage sampler 1 is connected in parallel with the critical load V S At both ends, the controller 2 generates corresponding control signals according to the grid voltage signal collected by the voltage sampler 1 to control the order of the fractional impedance 3, so that the fractional electrical spring suppresses grid voltage fluctuations based on the principle of mechanical springs to suppress mechanical vibration. Fractional-order electric springs are connected in parallel at both ends of the critical load to suppress...

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Abstract

The present invention discloses a smart grid fractional electrical spring that does not require non-critical loads. The smart grid fractional electrical spring includes a voltage sampler, a controller, and an order-adjustable fractional impedance; the controller is connected with a voltage sampler and a fractional impedance; and the voltage sampler is connected to two ends of a critical load in parallel. The controller generates a corresponding control signal according to the grid voltage signal collected by the voltage sampler to control the order of the fractional impedance. The invention can be directly connected to the two ends of the critical load in parallel, does not need to be equipped with non-critical loads, is flexible and convenient to use, ensures the stability of the criticalload voltage, and avoids the influence of the grid fluctuation on the critical load.

Description

technical field [0001] The invention relates to the application of fractional-order devices and the technical field of smart grids, in particular to a fractional-order electrical spring for smart grids that does not require non-critical loads. Background technique [0002] Smart grid is an inevitable trend in the development of grid technology. It is an important feature of the smart grid to allow the access of various renewable energy generation systems and to provide stable power quality that meets the needs of users. Renewable energy power generation systems (such as solar power generation systems, wind power generation systems) have the advantages of cleanliness and unlimited regeneration, but at the same time, due to the instability of weather (such as sunshine, wind power), the power generation of the system is unstable, making the grid voltage Fluctuations can easily cause unstable operation or even failure of important electrical equipment (that is, key loads). In ...

Claims

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Application Information

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IPC IPC(8): H02J3/24
CPCH02J3/24H02J3/002
Inventor 张波江彦伟丘东元
Owner SOUTH CHINA UNIV OF TECH
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