Розробка моделі активного фільтра вищих гармонік для забезпечення показників якості електричної енергії

Authors

  • В. Я. Бунько

Abstract

UDC 621.311.001.57

DEVELOPMENT of active filter MODEL of higher harmonics INDICATORS FOR QUALITY ELECTRIC POWER

V. Bunko

The quality of electric energy significantly affects the conditions and technical and economic characteristics of electricity as a receiver, and the entire electrical system. The deterioration of power quality can lead to a significant worsening of these conditions. In this regard, the work of electrical networks should be made so that the value set by GOST parameters of power quality did not exceed permissible. Otherwise, should take appropriate steps for the normalization of these indicators. Measures taken will vary depending on what quality of electricity should be normalized.
The basis for the decision taken on voltage regulation requirements for software specification. Know that the voltage regulation system is only in direct sequence. This reverse voltage and zero sequence remain uncompensated. They change the value of voltage deviations in individual phases. Ways to reduce this impact are mainly associated with balancing loads in three-phase system and some other events.
The feature of electricity is that its quality at the production site does not guarantee the quality of on-site consumption. Power quality before and after turning to the power consumers may also be different. Therefore, the appropriate quality of electricity - is one of its main performance production, transmission and distribution of consumer goods.

The main forms of action higher harmonic components of current and voltage on the electrical system components are:

- Increase the current and voltage harmonics due to resonance;

- Reducing the efficiency of the processes of generation, transmission and use of electricity as a result of additional losses;

- Speed up the aging of electrical insulation;

- Faulty operation of relay protection and automation.

In this research work the main objective of computer simulation is proof of theoretical analysis of electromagnetic processes occurring in the active harmonic filter and accuracy of the basic principles of management and accepted with assumptions. For this simulation environment of active harmonic filter selected software package MATLAB.

The advantage of the software system MATLAB compared with other specialized packages for simulation of electrical circuits is a great selection algorithms, both the variable and fixed-step calculation. This will reduce the time calculation in keeping high accuracy by choosing a suitable algorithm. Also, there is a possibility of storage and further processing in Simulink simulation results using batch tools MATLAB.

In this article the study design model active filter of higher harmonics based software environment MATLAB, affecting the quality of electricity distribution networks in the electrical system of agricultural and industrial enterprises. The model, which will analyze the different modes of converter circuits and electronic devices for research quality indicators of electricity.

To test the effectiveness of the resulting model active filter harmonics and control systems were modeled different modes of load, as well as an assessment of compensation of higher harmonics.

Overall, the analysis of models of three-phase compensating device demonstrates the correctness and effectiveness of its work modeled in all modes. Built a virtual model of the active harmonic filter and its management in the appendix Simulink software MATLAB. Built a virtual model of power that allows you to simulate different modes of load due time and nonlinearity. Investigated the quality of higher harmonics compensation in these modes. In the above modes ratio distortion sine wave voltage curve after enabling active filter of higher harmonics decreases 12 times that satisfies the requirements of GOST 13109-97 on ensuring quality parameters of electricity distribution networks in the electricity supply system.

 

References

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Published

2017-02-16

Issue

No. 240 (2016)

Section

Статті

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