System and method for generating a reference signal
A technology of reference signal and generation system, applied in the direction of instruments, measuring devices, measuring electricity, etc., can solve the problems of inability to automatically calibrate and compensate automatically, low output signal amplitude, phase and frequency accuracy, and inability to output signal calibration and compensation.
Active Publication Date: 2018-10-09
PONOVO POWER
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[0005] Although the traditional reference signal generation system can generate relay protection test signals including power frequency and various harmonics, the reference signal generation system is an open-loop system, which cannot be automatically calibrated and compensated. The amplitude and phase of the output signal And the frequency accuracy is low, for example: the amplitude error will be greater than 0.5%, and the measurement and calibration of the merging unit cannot be completed
[0006] In summary, the open-loop design of the reference signal generation system in the prior art cannot calibrate and compensate the output signal, and the amplitude, phase, and frequency accuracy of the output signal are low, and it is impossible to complete the measurement and calibration of the merging unit
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[0025] The specific implementation manner of a reference signal generation system and method provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0026] A reference signal generation system provided by an embodiment of the present invention, such as figure 2 As shown, the system includes: a digital control module 202, a digital-to-analog conversion module 204, a power amplifier module 206, and a feedback module 208; wherein, the digital control module 202 is used to receive the waveform parameters of the reference signal to be generated, and according to the reference signal to be generated The waveform parameters of the reference signal to be generated are determined, and the waveform parameters of the reference signal to be generated are corrected according to the output signal fed back by the feedback module 208; the digital-to-analog conversion module 204 is electrically connected to the digit...
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The invention discloses a reference signal generation system and method, and the system and method are used for improving the precision of the amplitude, phase and frequency of an output signal, and achieving the testing and calibration of related metering of a combination unit. The system comprises a digital control module, a digital conversion module, a power amplifier module, and a feedback module. The digital control module is used for receiving waveform parameters of a to-be-generated reference signal, determining a signal value of the to-be-generated reference signal according to the waveform parameters of the to-be-generated reference signal, and correcting the waveform parameters of the to-be-generated reference signal according to an output signal fed back by the feedback module. The digital conversion module is used for converting the signal value of the to-be-generated reference signal into an analog signal. The power amplifier module is used for amplifying the analog signal and then transmitting the amplified analog signal to a tested combination unit. The feedback module is used for collecting the output signal of the power amplifier module, and feeding back the collected output signal to the digital control signal.
Description
technical field [0001] The invention relates to the technical field of merging unit verification, in particular to a reference signal generation system and method for merging unit verification. Background technique [0002] With the expansion of the construction scope of smart substations and the deepening of the intelligent transformation of traditional substations, there are more and more intelligent devices in substations. Based on the application of new technologies, traditional debugging methods can no longer meet the requirements. New requirements were put forward. [0003] In the process layer of the smart substation, the merging unit, as an important intelligent electronic device (IED) for obtaining the current and voltage of the power system, carries the important functions of data collection, merging, and conversion of the front-end data of the secondary equipment of the power system. Effective testing of unit functions and performance has become an important link...
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IPC IPC(8): G01R1/28
CPCG01R1/28
Inventor 周文闻向前王宗兴
Owner PONOVO POWER