Automatic adjusting and controlling device for electricity energy quality

Abstract

The invention discloses an automatic adjusting and controlling device for electricity energy quality, which consists of a measuring and controlling circuit as well as a direct current excitation controllable saturable reactor (9), a harmonic filter channel (24), a capacitor compensating element (11) and a voltage balance adjusting part (18) connected in parallel, wherein a reactance coil (91) of the direct current excitation controllable saturable reactor (9) is connected in parallel with the harmonic filter channel (24) and an excitation coil (92) of the direct current excitation controllable saturable reactor is electrically connected with the output end of a controllable direct current excitation power supply (6); the output end of the measuring and controlling circuit is respectively and electrically connected with the control ends of the controllable direct current excitation power supply (6), a first switching part (15) and a second switching part (21), and is used for respectively controlling the switching of the exciting current of the excitation coil (92), the capacitor compensating element (11) and the voltage balance adjusting part (18) according to the detected variable quantity. The automatic adjusting and controlling device for electricity energy quality can automatically adjust the power factors of a power grid, implement reactive compensation, eliminate harmonic waves and three phase imbalance, and can be broadly applied for guaranteeing the electricity energy quality.

Description

technical field [0001] The invention relates to a control device, in particular to an automatic control device for power quality. Background technique [0002] Electric energy is the most important form of energy today. With the rapid development of my country's economy and technology and the rapid improvement of people's living standards, various complex, sophisticated, and power-quality-sensitive electrical equipment continue to popularize. Higher requirements have been put forward for the safety, stability and power quality of the system. [0003] With the advancement of science, the load structure of modern power systems has undergone major changes, such as the rapid development of loads such as semiconductor rectifiers, thyristor voltage regulators and frequency conversion adjustment devices, steelmaking electric arc furnaces, electrified railways, and household appliances. Due to its non-linearity, impact and unbalanced power consumption characteristics, the voltage wa...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a method that can correct the low power factor, harmonics, three-phase unbalance and voltage fluctuations caused by voltage waveform distortion in the power grid. An automatic power quality control device that adjusts, filters and eliminates flicker problems

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