Series active AC voltage quality regulator and controlling method

Abstract

The invention discloses the mass adjuster of series active alternating voltage and the controlling method, thereinto, the charging and the storing setting can be formed by the anode of the controlled silicon V1 and the cathode of the controlled silicon V2 connecting, then it can be connected by the fan-out of the isolating transformer 2; the anode of the controlled silicon V3 and the cathode of the controlled V4 are connected, then it can be connected by the other fan-out of the isolating transformer 2; the cathode of the controlled silicon V1 and the cathode of the controlled silicon V3 is parallel connected, then, it can be connected by the anode of the capacitor C; the anode of the controlled silicon V2 and the anode of the controlled silicon V4 are parallel connected, then, it can be connected by the cathode of the capacitor C. the invention can adjust fitly the direct current voltage of the contradictorily changing organ. The alternating supply of the qualified system is conducted the firming the pressure and the strain, the power supply voltage mass of the alternating supply can be improved. Even in the instance of fluctuating of the frequency of the power supply voltage, the alternating current mass control has the good firming voltage ability and the straining wave ability.

Description

technical field [0001] The invention belongs to the field of electrotechnical technology, and in particular relates to a series active AC voltage quality regulator and a control method capable of adaptively adjusting DC side voltage. Background technique [0002] With the development of modern science and technology, on the one hand, various complex, sophisticated, and power-quality-sensitive electrical equipment are becoming more and more popular, and people have higher and higher requirements for power quality and reliability; on the other hand, causing power The factors of quality problems are constantly increasing, and the contradictions of the above problems are becoming more and more prominent. [0003] Most of the power quality problems can be attributed to the voltage quality problem, especially the voltage quality problem of the common node. Various disturbances in the grid voltage, such as voltage rises, drops, transients, harmonics, etc., will lead to the normal ...

AI Technical Summary

Problems solved by technology

Disadvantages: poor load adaptability, sensitive to frequency changes, large volume

Disadvantages: sensitive to frequency changes, poor load adaptability

Even when the system defect voltage is zero, the inverter works at a higher DC voltage, which is very unreasonable

On the other hand, the DC side voltage is high and the duty ratio of the inverter is small, and the dead zone of the inverter operation is more serious, which will affect the compensation performance of the series active AC voltage quality regulator.

[0010] For the slow-change or steady-state voltage quality problems of the low-voltage power distribution system, the DC side voltage is not controlled or kept constant, and cannot automatically follow the change of the difference between the grid voltage and the rated output voltage. One of the main reasons for not being high enough

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