High-voltage pulse signal generator and circuit and circuit parameter calculation method thereof

Abstract

The invention discloses a high-voltage pulse signal generator and circuit and a circuit parameter calculation method thereof. A high-voltage direct current source uses a charging resistor to charge amain capacitor via a wave head adjusting resistor. The main capacitor, the wave head adjusting resistor, a wave tail adjusting resistor, a primary storage capacitor and a controllable trigger switch form a primary microsecond pulse loop to generate wavefront-adjustable microsecond pulse wave; the primary storage capacitor, a steepening switch, a secondary storage capacitor, and a wave modulation resistor form a secondary nanosecond pulse output loop to output a high-voltage nanosecond pulse wave; according to the capacitance value of a load inlet, a proper wave adjusting resistor is selected and frequency domain distribution of the output pulse is adjusted. The circuit has advantages of large output pulse spectrum range and high voltage; and the first-end voltage pulse frequency spectrum range of the converter transformer is large and the distribution is uniform. The amplitude of the output voltage can be controlled via the input. The circuit is suitable for the high-voltage pulse generator of the transformer time domain characteristics measurement.

Description

technical field [0001] The invention relates to a high-voltage nanosecond pulse generating device, in particular to a high-voltage pulse signal generator, a circuit thereof, and a method for calculating circuit parameters. Background technique [0002] my country has a vast territory, uneven distribution of energy resources and load centers, UHV DC transmission has long transmission distance, large capacity, and low loss, which is an effective way to optimize the allocation of energy resources in my country. As a key component of the UHVDC transmission system, the converter station may suffer from different types of overvoltage intrusion under normal or fault conditions. Its safe and stable operation is the core technology of UHVDC transmission. Whether the overvoltage calculation and insulation coordination design of the converter station are reasonable will directly affect the economy and safety of the entire project, so it is of great significance to accurately calculate ...

AI Technical Summary

Problems solved by technology

The physical modeling method based on electromagnetic field calculation does not consider the frequency-varying effect of equipment parameters at high frequencies, so the model response error is large at high frequencies

However, there are the following problems in the modeling method based on the frequency domain measurement of external characteristics: First, the accuracy of the frequency response of the application of low-power signal measurement equipment: due to the limited power of the network analyzer and impedance analyzer used, the current high-frequency The output power of the test is very low, and the amplitude of the output frequency sweep voltage is only 1V, which is far lower than the normal operating voltage of the equipment. Whether the measurement results can accurately reflect the response characteristics of the equipment under normal operation is currently seldom researched, and there are still some doubts

Second, when using a network analyzer or impedance analyzer to measure the frequency characteristics of large-scale equipment, the measurement results are greatly affected by the measurement leads and the error increases significantly as the frequency increases. Although the test method can be used to avoid it, the effect is still unknown

When the traditional nanosecond pulse generator carries a large capacitive load, the frequency domain range of the converter transformer inlet voltage is small, and the voltage amplitude is low. At present, there is still a lack of high-voltage nanosecond pulse signal generators for UHV converter transformers.

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