High-voltage automatic-tuning compensator in power quality treatment

Abstract

The invention discloses a high-voltage automatic-tuning compensator in the power quality treatment. The high-voltage automatic-tuning compensator comprises a control unit CT / H and at least one tuning compensation unit. The control unit CT / H is electrically connected with the tuning compensation units, a switching switch K1 is arranged between the control unit and the tuning compensation units, each tuning compensation unit comprises a switching capacitor set and a current transformer CT, a signal inlet of the switching capacitor set is connected with the switching switch K1, a signal outlet of the switching capacitor set is connected with one ends of the current transformers CT, and the other ends of the current transformers CT are connected with high voltage. The switching capacitor set comprises at least two groups of switching capacitors connected in parallel, and each switching capacitor is composed of a fuse FU and a capacitor C which are serially connected. By the high-voltage automatic-tuning compensator, system voltage quality is improved, transmission capacity of electric transmission and transformation equipment is improved, and defects of excessive or deficient compensation are overcome.

Description

technical field [0001] The invention relates to a tuning compensation device, in particular to a high-voltage automatic tuning compensation device in power quality control. Background technique [0002] With the wide application and development of power electronics technology, there are more and more nonlinear loads in the power system, such as rectifiers, frequency converters, UPS, household appliances and computers. These non-linear loads will generate harmonic currents and inject them into the grid, distorting the voltage waveform in the grid, thus causing the harmonics of the grid to be "polluted". In addition, impact and fluctuating loads, such as electric arc furnaces and welding equipment, will not only generate a large number of high-order harmonics during operation, but also cause voltage fluctuations, flicker, and three-phase imbalances to become more serious, endangering the safety of the power grid Operation, harmonic current flows in the power grid, increases t...

AI Technical Summary

Problems solved by technology

These non-linear loads will generate harmonic currents and inject them into the grid, distorting the voltage waveform in the grid, thus causing the harmonics of the grid to be "polluted"

In addition, impact and fluctuating loads, such as electric arc furnaces and welding equipment, will not only generate a large number of high-order harmonics during operation, but also cause voltage fluctuations, flicker, and three-phase imbalances to become more serious, endangering the safety of the power grid Operation, harmonic current flows in the power grid, increases the loss of the power grid, affects the economic operation of the power grid and various electrical equipment, greatly increases the possibility of resonance in the power grid, and leads to overvoltage or overcurrent, causing serious accidents; and, Harmonics increase the loss of power transformers and generators, generate overheating, reduce output power, and cause errors in various instruments widely used in the power grid, such as voltmeters, ammeters, power meters, and watt-hour meters.

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