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Method and system for configuring VSMES parameters in inhibiting distribution network transient fault

A parameter configuration method and instantaneous fault technology are applied in the field of power grid to ensure the effect of normal and safe operation

Inactive Publication Date: 2017-03-15
YUXI POWER SUPPLY BUREAU OF YUNNAN POWER GRID
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Problems solved by technology

[0005] Based on this, it is necessary to provide a VSMES parameter configuration method and system for suppressing distribution network transient faults in order to quickly suppress distribution network transient faults and ensure power supply. Normal and safe operation of the power grid

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  • Method and system for configuring VSMES parameters in inhibiting distribution network transient fault
  • Method and system for configuring VSMES parameters in inhibiting distribution network transient fault

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Embodiment Construction

[0027] The present invention proposes a VSMES parameter configuration method and system for suppressing instantaneous faults in the distribution network. The main circuit topology of the VSMES is as follows figure 1 As shown, the parameter configuration method mainly includes three aspects: the selection of the inductance value L of the superconducting coil, the initial current I of the superconducting coil sm_ref The selection and supporting capacitor voltage U dc selection. The selection of the inductance value L of the superconducting coil is the key to determine the magnitude of the subsequent initial current, which affects the energy magnitude of the superconducting magnetic energy storage. The initial current I sm_ref The selection of directly reflects the minimum energy storage value ΔE of VSMES to suppress the voltage drop, and the supporting capacitor voltage U dc The selection and correction of will directly affect the power adjustment range of VSMES.

[0028] lik...

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Abstract

The invention provides a method and a system for configuring VSMES parameters in an inhibiting distribution network transient fault. The system comprises the following steps: estimating the basic energy of the VSMES inhibiting distribution network transient fault, determining superconducting coil inductance in the VSMES according to the estimated basic energy, superconducting coil critical current in the VSMES and direct-current voltage born by a superconducting coil in the VSMES, obtaining the minimum stored energy required for voltage drop caused in the VSMES inhibiting distribution network transient fault, determining initial current in the VSMES, obtaining an operating point when the voltage is supported by the VSMES and a power circle indicating the power adjusting range of the VSMES, and determining capacitor voltage supported in the VSMES. In the whole process, the VSMES parameters in the inhibiting distribution network transient fault can be quickly and accurately configured by using an engineering parameter design method and a parameter design thought based on the power circle, so that normal and safe operation of an electric power grid is guaranteed.

Description

technical field [0001] The invention relates to the technical field of power grids, in particular to a VSMES (V-superconducting magnetic energy storage, voltage source superconducting magnetic energy storage) parameter configuration method and system for suppressing instantaneous faults in distribution networks. Background technique [0002] The distribution network is the key link between the power supply and the user. Due to the wide range of the distribution network, the large number of equipment, and the complex operating conditions, various faults occur frequently, especially the normal power consumption behavior of power users. Among the many faults in the distribution network, transient faults are particularly prominent, manifested as instantaneous voltage drops, which seriously affect the normal power consumption of power users. [0003] Since SMES (superconducting magnetic energy storage, superconducting magnetic energy storage) has the dynamic characteristics of fa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/28H02J3/12
CPCH02J3/001H02J3/12H02J3/28Y02E40/10Y02E40/60
Inventor 赵华郭伟周伟杨隽冯磊李媛
Owner YUXI POWER SUPPLY BUREAU OF YUNNAN POWER GRID
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