A high-amplitude multi-state single-sequence waveform controllable output device and method

Abstract

The invention aims at providing a high-amplitude multi-state single-sequence waveform controllable output device and method. A control part of the device is provided with a high-speed multi-grading unit with an IGBT high-speed power electronic switch. Moreover, a primary side of the device is reconstructed, and a high-speed parallel output unit is added. The on / off of different tap positions of switches is controlled through the IGBT high-speed power electronic switch, thereby changing the amplitude of the voltage of a secondary side of a first transformer. Meanwhile, different windings at the primary side of a second transformer are selected, thereby adjusting the secondary output value of the second transformer. The time in switching of tap positions is short, and a transient process can be neglected. According to the technical scheme of the invention, the device is stable in waveform output, is high in speed of waveform transformation, and can highly simulate the change state of a single-phase current of a line in a power system, such as short circuit, reclosing, grounding and surge. Moreover, the device also can be used for simulating the change of a single-phase voltage in a current system, or is used in other fields which need high-precision large-fluctuation waveform output, such as seismology and acoustics. The device is wide in application range, and is high in practicality.

Description

technical field [0001] The invention belongs to electric power system waveform control, in particular to a high-amplitude multi-state single-sequence waveform controllable output device and method. Background technique [0002] At present, the market has higher and higher requirements for the accuracy and immediacy of equipment output waveforms. The devices that can realize arbitrary waveform output are all small waveform output devices, and the line voltage and current values ​​in the power system are large, and the small waveform output device cannot effectively simulate the real power system line waveform state. Therefore, it is very necessary for the research work of the power system to have the equipment that outputs high-amplitude waveforms and the changing state meets the requirements. High-amplitude waveform output devices on the market are mainly high-voltage / high-current output devices, and high-voltage / high-current output devices can only output steady-state wave...

AI Technical Summary

Problems solved by technology

High-amplitude waveform output devices on the market are mainly high-voltage / high-current output devices, and high-voltage / high-current output devices can only output steady-state waveforms in one state, such as figure 1 , or cannot switch between two steady-state waveforms at high speed, and does not have the ability to continuously output waveforms of multiple states at high speed. Waveforms of multiple states such as figure 2

[0003] The principle of the existing high voltage / high current output device is as follows: image 3 As shown, the one-time amplitude change output is mainly completed by the adjustment part, and only one state of steady-state waveform can be output, or it does not have the ability to change the waveform at a high speed.

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