High frequency current source of real-time control of waveform amplitude frequency separation
A technology of real-time control and high-frequency current, applied in the field of current source, can solve problems such as hidden dangers of test content, lack of on-site recording file or simulation sampling file playback output function, and inability to adjust output signal parameters in real time, so as to increase the number of application scenarios Different types of test items and the effect of solving high-frequency limitations
Active Publication Date: 2019-05-03
GUANGDONG POWER GRID CO LTD +1
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Problems solved by technology
During the output process, the output signal parameters cannot be adjusted in real time, and there is no playback output function for live recording files or simulation sampling files
At present, when conducting high-frequency current testing of DC electronic transformers, it is generally realized by controlling the current-type power amplifier. The frequency response test is within the range of 3kHZ, and there is a lack of frequency aliasing tests for higher frequency signals. Hidden danger
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[0063] The invention provides a high-frequency current source for real-time control of waveform amplitude-frequency separation, which has the frequency output capability in the range of 10 kHz to 50 kHz, and can develop frequency characteristics such as frequency response accuracy, filter cut-off frequency, and frequency aliasing effect of DC electronic transformers. test.
[0064] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protect...
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The invention provides the high frequency current source of the real-time control of waveform amplitude frequency separation. The current source is characterized by analyzing the imported original sampling data through PowerPC, analyzing the amplitude and the frequency parameter of a signal, and calculating a direct current amplitude control signal proportional to a sampling signal amplitude, andan alternating current frequency control signal which has the same frequency with a sampling signal; completing the coding output of the control signal and sending sequential control through an FPGA module; generating a direct voltage simulation signal through a first digital to analog conversion module; generating an alternating voltage simulation signal through a second digital to analog conversion module; and outputting a high frequency current signal through a power electronic current generator. Through combining a conventional analog power amplifier test method and the good high-frequencyoutput characteristic of a digital current source, the frequency characteristic tests of the frequency response precision, the filter cutoff frequency, the frequency aliasing and the like of a directcurrent electronic transformer can be performed.
Description
technical field [0001] The invention relates to the technical field of current sources, in particular to a high-frequency current source for real-time control of waveform amplitude-frequency separation. Background technique [0002] The DC transformer is an important primary equipment for the construction and operation of the DC transmission system. It provides accurate and reliable measurement information for the control and protection of the system. Its operation reliability and measurement accuracy are directly related to the safe and stable operation of the DC transmission system. At this stage, the DC electronic transformers used in my country's DC transmission projects are mainly imported from abroad, and there is a lack of corresponding research and production experience and debugging and calibration methods in China, especially in the field of converter stations. Evaluate the operating conditions of DC transformers. In actual operation, the DC transformers of some co...
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Inventor 王红星卢启付余超耘盛超骆潘钿张健肖磊石刘正富唐酿杨汾艳黄辉朱良合黄明欣郭敬梅张炜
Owner GUANGDONG POWER GRID CO LTD