A UPQC Parameter Optimization Method Based on Punching Function Algorithm

An optimization method and function technology, applied in design optimization/simulation, special data processing applications, etc.

Active Publication Date: 2021-09-14
YUNNAN POWER GRID
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are relatively few studies on the circuit parameter design of the two components of UPQC. Most of the actual design of UPQC is to find the applicable parameters from the feasible domain based on experience, and there are fewer studies on the design of comprehensive multi-factor optimization.

Method used

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  • A UPQC Parameter Optimization Method Based on Punching Function Algorithm
  • A UPQC Parameter Optimization Method Based on Punching Function Algorithm
  • A UPQC Parameter Optimization Method Based on Punching Function Algorithm

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Embodiment Construction

[0060] The present invention is described in detail below in conjunction with accompanying drawing and specific embodiment:

[0061] see figure 1 It is a single-phase equivalent circuit of UPQC, and the UPQC circuit is composed of two active filter circuits of a series unit and a parallel unit, wherein the series unit includes an inductor L c , capacitance C c , resistance R c Constituted LCR type output filter, the parallel unit consists of an inductor L b , capacitance C b , resistance R b Formed LCR output filter;

[0062] see figure 2 Be a kind of flow chart of the UPQC parameter optimization method based on punching function algorithm of the present invention, concrete steps are as follows:

[0063] S1. To establish the mathematical model of UPQC, first perform Laplace transform and derive the voltage transfer function G of the series unit in the frequency domain c (ω) and the voltage transfer function G of the parallel unit b (ω):

[0064]

[0065]

[00...

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Abstract

The present invention relates to a UPQC parameter optimization method based on a hole punching function algorithm, establishes a UPQC model, analyzes and deduces the transfer functions of the series unit and the parallel unit respectively, and determines the working requirements of the UPQC, including the harmonic frequency to be filtered out Range, tracking performance for harmonic current and current ripple requirements; take the filter effect function and circuit cost to be optimized as the objective function, take the resistance, reactance and inductance in the series unit and the parallel unit as the decision variables, and take the harmonic The current tracking requirements and the current ripple requirements are used to establish the UPQC optimization model for the constraint function; the UPQC resistance, reactance and inductance are solved for the optimization model by using the hole punching function, and the UPQC parameter setting scheme suitable for specific working conditions is determined. The invention takes into account the filtering effect, circuit cost and stable performance, fully considers the filtering effect and cost of the UPQC equipment put into operation, and completes the optimization of the filtering effect and circuit cost.

Description

technical field [0001] The invention relates to an UPQC parameter optimization method based on a hole punching function algorithm, belonging to the field of electric equipment design. Background technique [0002] With the continuous expansion of the scale of the power system, the continuous improvement of the level of industrial automation and the continuous growth of various nonlinear loads, the harmonic pollution of the power system is becoming more and more serious, and the power quality problem is becoming more and more serious. High-quality electric energy is of great significance to ensure the safe and economical operation of power grids and electrical equipment, improve product quality and ensure the normal life of residents. [0003] Unified power quality controller (UPQC—Unified Power Quality Conditioner) can quickly compensate sudden rise or fall, fluctuation and flicker, harmonic current and voltage, etc. in the supply voltage, and is a power quality conditioner ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 冯磊
Owner YUNNAN POWER GRID
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