Variable-frequency harmonic wave and surge suppressing device

Abstract

The invention relates to a variable-frequency harmonic wave and surge suppressing device. A harmonic wave and surge suppressing part is correspondingly connected between the output ends of a three-phase power supply and the input ends of a frequency converter in series, the output ends of the frequency converter are correspondingly connected with the input ends of a power load in series, a harmonic wave absorbing and suppressing and power improving part is correspondingly connected between the harmonic wave and surge suppressing part and the input ends of the frequency converter in parallel, wherein the harmonic wave and surge suppressing part comprises three double-tuning reactors, one ends of the three double-tuning reactors are correspondingly connected with the output ends of the three-phase power supply in series, and the other ends of the three double-tuning reactors are correspondingly connected with the input ends of the frequency converter in series; the harmonic wave absorbing and suppressing and power improving part comprises three single-tuning reactors and three filter capacitors, the other ends of the three single-tuning reactors are correspondingly connected with the three filter capacitors in series, and one ends of the single-tuning reactors are correspondingly connected with the other ends of the three double-tuning reactors in parallel. The variable-frequency harmonic wave and surge suppressing device can effectively absorb and suppress sudden surges generated by instantly using the power supply and current harmonic waves generated by the frequency converter and simultaneously can improve the power factors of a system.

Description

technical field [0001] The invention relates to a power load equipment device controlled by frequency conversion. Background technique [0002] With the rapid development of social economy, the lack of resources has become a problem in all countries in the world. Improper use of power resources and the increase of pollution sources have caused waste of power energy. The waste of power resources accounts for more than 60% of the total power consumption with power load. However, the main reason is the unreasonable distribution of its utilization efficiency. Based on this, common users have also begun to use frequency conversion speed regulation technology to rationally use energy. However, the introduction of frequency converters has created harmonic sources and pollution to the power grid. Interference caused by some precision equipment makes it unable to work normally, causing malfunction of relay protection and automatic devices, serious deviation of electric energy measure...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of social economy, the lack of resources has become a problem in all countries in the world. Improper use of power resources and the increase of pollution sources have caused waste of power energy. The waste of power resources accounts for more than 60% of the total power consumption with power load. However, the main reason is the unreasonable distribution of its utilization efficiency. Based on this, common users have also begun to use frequency conversion speed regulation technology to rationally use energy. However, the introduction of frequency converters has created harmonic sources and pollution to the power grid. Interference caused by some precision equipment makes it unable to work normally, causing malfunction of relay protection and automatic devices, serious deviation of electric energy measurement and interference of communication equipment, and causing additional loss and overheating of some equipment, and even burns out these in serious cases. equipment

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