Variable-frequency series resonance test method based on FPGA (field programmable gate array)

A frequency conversion series resonance and test method technology, applied in the direction of testing dielectric strength, etc., can solve the problems of poor smoothness of AC output voltage waveform and heavy program debugging workload, etc.

Active Publication Date: 2012-10-24
广东电网有限责任公司惠州供电局
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Problems solved by technology

[0005] Based on this, it is necessary to provide a FPGA-based frequency conversion series resonance test method for the problems of large pr

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  • Variable-frequency series resonance test method based on FPGA (field programmable gate array)

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Embodiment Construction

[0015] The specific implementation of the FPGA-based frequency conversion series resonance test method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0016] figure 1 The flow chart of the FPGA-based frequency conversion series resonance test method of an embodiment is shown, which mainly includes the following steps:

[0017] Step S101, collecting the voltage signal and current signal of the three-phase power supply;

[0018] In one embodiment, the voltage signal and the current signal of the three-phase power supply are collected respectively at first by using the voltage sensor and the current sensor, and then they are input to the A\D interface of the VHS-ADC platform interface board;

[0019] In the above steps, through the voltage and current collection, the grid voltage and current signals that have been preliminarily filtered and fixed ratio can be obtained, so that the collected voltage and current signals c...

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Abstract

The invention provides a variable-frequency series resonance test method based on an FPGA (field programmable gate array). The method comprises the following steps: collecting voltage signals and current signals of a three-phase power supply; conditioning the voltage signals and the current signals with a VHS-ADC (video home system-analog to digital converter) platform; carrying out the SVPWM (space vector pulse width modulation) according to the digital voltage signals and the digital current signals obtained through the conditioning and sine wave and cosine wave so as to obtain the SVPWM modulation signal; establishing a VHS-ADC control system based on an FPGA chip for realizing the SVPWM manner; generating SVPWM pulse signals from the SVPWM modulation signals with the VHS-ADC control system; and carrying out the series resonance test according to the SVPWM pulse signals. According to the technology disclosed by the invention, the power factor of a power supply on the alternating-current (AC) input side of the variable-frequency series resonance test device is increased, and the fluctuation of the output direct-current (DC) voltage is reduced, so that the voltage waveform on the output side of the variable-frequency power supply becomes the sinusoidal waveform with good smoothness, and the utilization rate of the power supply is increased; and due to the VHS-ADC control model established based on the FPGA, the development for the control system part is short in cycle, low in debugging workload and fast in processing speed.

Description

technical field [0001] The invention relates to a frequency conversion series resonance test technology, in particular to an FPGA-based frequency conversion series resonance test method. Background technique [0002] In some research and industrial application fields, it is necessary to judge the insulation strength of electrical equipment through the AC withstand voltage test, which can test the insulation strength of electrical equipment to withstand the effect of long-term power frequency voltage and the ability of power frequency voltage to rise. Then decide whether the electrical equipment can leave the factory or whether it can be put into operation. Therefore, in the factory test, handover test and insulation preventive test of general electrical equipment, AC withstand voltage test is required. [0003] Some electrical equipment, such as transmission lines, power cables, large generators, GIS combined electrical appliances and other large-capacity tested products, r...

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Application Information

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IPC IPC(8): G01R31/12
Inventor 董玉玺解德英付志红李春燕曾力朱毅刚李国良谢兵平陈奋林志明肖云王万宝黄穗雯王俊星王云龙刘敏
Owner 广东电网有限责任公司惠州供电局
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