Research on the Suppression of Interference of Large Capacity Arc Furnace to Power Network
Abstract
As the current level of energy consumption in China continues to increase, the engineering application of electric arc furnace and other large capacity power devices continues to penetrate into various production and living electric loads. However, the large switching capacity and large reactive current of the electric arc furnace process lead to electric network interference, which also leads to some operating and economic problems in the enterprise. Therefore, in order to reduce the interference of electric arc furnace on electric network, some reference solutions and methods are studied. In this paper, we will analyze the research and development of monitoring technology and the application of active power filter system in the electric arc furnace power line to suppress the electric network interference of the electric arc furnace process.
Keywords: Electric arc furnace, Electric network, Interference, Active power filter system
1 Introduction
The electric arc furnace is a smelting device that heats and melts the material, which is widely used in industrial production. Its main body is composed of a large steel shell, which has the advantages of small size, high thermal efficiency and low energy consumption. The large fluctuations, shock currents, and frequent switching associated with the electric arc furnace process often lead to electric network interference, resulting in poor power quality and dangerous operating conditions in the enterprise.(美国论文代写)
The operation of electric arc furnace and other extreme loads will produce large amounts of higher-frequency harmonics, and high harmonic levels can cause large voltage distortion throughout the system. This disturbance affects the quality and stability of the electric network and also affects the operation of other electrical appliances. If these phenomena continue to exist and do not receive effective treatment, some electrical systems and equipment will be permanently damaged. Therefore, it is necessary to mitigate the power network interference generated by the electric arc furnace operation.
2 Research and development of monitoring technology
The analysis of the operation process of the electric arc furnace power line and the monitoring of the component data can provide a basic condition for effectively avoiding the interference of the power network. In order to obtain accurate monitoring data, the micro-power monitoring system can be set up by setting up a microcomputer feature meter at the appropriate location of the transformer in the electric arc furnace power line. By monitoring the alternating current of the transformer, real-time monitoring of each component of the electric arc furnace power line can be realized, so that data can be effectively obtained corresponding to various working states.[1]
Research and development of monitoring technology can effectively collect components of electric arc furnace power line parameters. Through the application of this technology, various components, such as voltage levels and current levels, can be observed and recorded in real time to provide a basis for the maintenance and optimization of the electric arc furnace power line.
3 Application of active power filter system
The active power filter system is used to suppress power network interference in the electric arc furnace process. Its principle is to produce harmonic current that is exactly the opposite of the harmonic component current at the power load end through harmonic estimation, amplitude adjustment and phase-lock control, and to compensate in the opposite direction. Therefore, a balanced three-phase current is obtained on the power connection side of the electric arc furnace, and the power network interference at the end of the power line can be effectively suppressed. Thereby, the compatibility of the electric arc furnace power line with the power system can be improved, and the economic and operational losses can be reduced.[2]
In this way, by applying the active power filter system to the electric arc furnace power line, more accurate harmonic compensation can be obtained. The asynchrony of the electric arc furnace process can be effectively eliminated, which can reduce the electrical interference.
4 Conclusion
In short, the electric network interference of the electric arc furnace process should be given adequate attention. As an effective means to suppress the interference of the electric arc furnace process to the electric network, research and development of monitoring technology and application of active power filter system are both important components. Monitoring technology can effectively realize the real-time collection of electric arc furnace power line parameters and provide a basis for optimizing and maintenance. The active power filter system can eliminate the asynchrony of the electric arc furnace process, reduce the electrical interference, and improve the compatibility of the electric arc furnace power line with the power system.
References:
[1] R. J. H. Wissen, P. F. Driessen and J. Prooijen, “Fundamental Measurements for the Systematic Analysis of Electrical Power Network Disturbances Caused by Light Industrial Power Loads with Learning
[2] Z. Yue et al., “Research on Active Power Filter suppressing the Electromagnetic Interference of the Electric Arc Furnace Process in Power Network”, Advanced Materials Research, vol. 855, pp. 781-784, 2014.
