Optimal configuration method of fault current limiter based on adaptive particle swarm algorithm

A technology of particle swarm algorithm and fault current, applied in emergency protection circuit devices, circuit devices, design optimization/simulation for limiting overcurrent/overvoltage, etc., can solve premature convergence, optimal impedance sequence is not optimal solution, algorithm types, etc.

Active Publication Date: 2017-02-22
STATE GRID CORP OF CHINA +2
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  • Abstract
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Problems solved by technology

[0003] At present, the impedance selection methods of the fault current limiter can be divided into two categories: the first is the optimal configuration method based on the sensitivity method, which mainly obtains the sensitivity of the self-impedance at the point where the short-circuit current exceeds the standard to the impedance parameters of these branches. Size, select multiple candidate branches for installing FCL, and then optimize the candidate branches to realize the optimal configuration of SFCL installation location, quantity and impedance value; the second is the optimal configuration based on the PSO algorithm, mainly through The basic PSO algorithm is used to optimize the configuration of the

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  • Optimal configuration method of fault current limiter based on adaptive particle swarm algorithm
  • Optimal configuration method of fault current limiter based on adaptive particle swarm algorithm
  • Optimal configuration method of fault current limiter based on adaptive particle swarm algorithm

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Embodiment Construction

[0072] In this embodiment, the structure of the fault current limiter is as follows figure 1 As shown, the equivalent circuit diagram of the normal operation state and the current-limited operation state after the action is as follows Figure 2a and Figure 2b As shown, the capacitance and inductance form a series resonance before the input, and the equivalent impedance is almost zero. After connecting to the line, only the current-limiting inductance is connected, and the value of the inductance is X. The main parameter is the current-limiting impedance connected to the system when a fault occurs. X.

[0073] Such as image 3 As shown, an optimal configuration method of the fault current limiter based on the adaptive particle swarm optimization algorithm can quickly and accurately obtain the optimal solution of the installation impedance sequence, so as to achieve the purpose of improving the accuracy of current limiting and saving the cost of current limiting. Specificall...

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Abstract

The invention discloses an optimal configuration method of a fault current limiter based on an adaptive particle swarm algorithm. The method includes the following steps: 1, calculating short circuit current of each branch circuit, and selecting a standard-exceeding node; 2, building a mathematical model of an FCL optimization configuration problem, 3, conducting optimization configuration on the FCL by the adaptive particle swarm algorithm. According to the optimal configuration method, a more accurate optimal computation can be conducted on installation impedance of the FCL, the installation impedance value is optimized on the premise that fault current is limited, so that a reference is provided for the actual installation of the FCL in an electric power system.

Description

technical field [0001] The invention relates to the technical field of power system analysis, more specifically to a method for optimal configuration of a fault current limiter. Background technique [0002] The rapid development of modern power systems is characterized by increasing unit capacity, increasing voltage levels, expanding the scale of the power grid, and interconnecting large power grids. Correspondingly, the level of short-circuit current in the system is also constantly increasing. As a member of the FACTS family, the fault current limiter has been widely used in fault current limitation in recent years. Because the structure of the commonly used series resonant fault current limiter is well known, but in practical applications, when the current limiting impedance of the fault current limiter is different, the short-circuit current limiting effect on the line and the entire power grid is very significant. big impact. Therefore, using the particle swarm optim...

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Application Information

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IPC IPC(8): G06F17/50G06N3/00H02H9/02
CPCG06F30/20G06N3/006H02H9/028
Inventor 林哲敏董浩张旭昶毛荀罗亚桥王凤霞占勇潘军吴红斌
Owner STATE GRID CORP OF CHINA
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