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Multi-objective optimization design method of AC filter based on improved particle swarm optimization algorithm

An AC filter, a technology for improving particle swarms, applied in AC networks to reduce harmonics/ripples, AC network circuits, power transmission AC networks, etc., can solve the problem of failing to achieve multi-objective optimization of AC filters in HVDC power transmission projects Design, can not guarantee the performance indicators and economic indicators at the same time to achieve the most ideal state and other issues

Active Publication Date: 2021-12-07
JIANGSU FRONTIER ELECTRIC TECH +3
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Problems solved by technology

The design method of the AC filter of HVDC transmission project adopts traditional theoretical calculation, or adopts the intelligent algorithm of single-objective optimization, which cannot guarantee the performance index and economic index to reach the optimal state at the same time, and fails to realize the AC filter of HVDC transmission project. multi-objective optimization design of

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  • Multi-objective optimization design method of AC filter based on improved particle swarm optimization algorithm
  • Multi-objective optimization design method of AC filter based on improved particle swarm optimization algorithm
  • Multi-objective optimization design method of AC filter based on improved particle swarm optimization algorithm

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Embodiment Construction

[0080] The present invention is described in further detail now in conjunction with accompanying drawing.

[0081] Such as figure 1 As shown, the object system is a circuit model of the rectification side of a 1000MW (500kV, 2kA) HVDC transmission system, including a three-phase voltage source with series RL branch, load impedance of RL parallel branch, three-phase three-winding transformer , 12-pulse rectifier, 12-pulse generator, oscilloscope, smoothing reactor, 1000MW resistive load; the converter is open-loop controlled using an external / discrete control library of "synchronous 12-pulse generator" with constant trigger Angle α19 degrees.

[0082] 1. Calculate the reactive power Q consumed by the converter station dc

[0083] 1) Calculate the commutation angle μ according to the relative inductive voltage drop of the converter transformer:

[0084]

[0085] In the formula, α is the firing angle, d x is the relative inductive voltage drop of the converter transformer...

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Abstract

The AC filter multi-objective optimization design method based on the improved particle swarm optimization algorithm adopts the multi-objective particle swarm algorithm. The AC filter is composed of a double-tuned high-pass filter with high-pass, a triple-tuned filter and a shunt capacitor; Determine the total capacity and single-group capacity of the AC filter; determine the type of filter by analyzing the frequency spectrum of the current harmonics of the AC bus bar and combining economics; and determine the filter type based on the investment cost of the filter and the total harmonic distortion rate As the objective function, multi-objective optimization is realized; the algorithm uses the secondary storage library of particles, each particle guides their respective flight, introduces a mutation operator to improve the exploration ability of the algorithm, and adopts the method of fuzzy control to store The final non-inferior solution set in the library is evaluated, and the particle with the best benefit is output as the optimal solution. The results show that the method can effectively filter out the harmonics generated by the converter station, and at the same time save costs, and is highly efficient and reliable.

Description

technical field [0001] The invention belongs to the field of high-voltage direct current transmission, and in particular relates to an evolutionary multi-objective optimization design for an AC filter under the background of high-voltage direct current transmission. Background technique [0002] In order to reduce the loss of transmission lines and save precious land resources, high voltage direct current transmission (HVDC) technology has been gradually developed. With the continuous maturity of high-power power electronic technology, the advantages of high-voltage DC transmission system in terms of large-capacity and long-distance transmission in terms of economy, stability and flexibility are becoming more and more prominent. However, the high-voltage direct current transmission system will inevitably generate a large number of harmonics during operation, and these harmonics must be suppressed by AC and DC filtering devices. Therefore, whether the design of the filtering...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/01H02J3/36
CPCH02J3/01H02J3/36H02J2003/365Y02E40/40Y02E60/60
Inventor 石凡王宏华王成亮王金虎徐妍樊森官国飞
Owner JIANGSU FRONTIER ELECTRIC TECH
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